Performance analysis of new energy-saving and environment-friendly materials for building decoration based on the whole life cycle

Abstract As people put forward higher demand for the effect and quality of building interior decoration, the attention to building energy-saving materials has become higher and higher. In recent years, there have been many researches on green building energy-saving technology, green building evaluation and other aspects, but there are relatively few researches on applying the concept of full life cycle cost to the performance analysis of new materials for building energy conservation and environmental protection. Considering the economic performance of buildings will help to save resources in the construction industry and reduce energy consumption. The so-called full life cycle optimization of energy-saving design of green buildings is to take the concept of full life cycle optimization as the most reference, fully coordinate all elements in the portfolio project, and ensure that the full life cycle cost of the building can be greatly reduced. To realize the energy-saving optimization of green buildings, it is necessary to ensure that it runs through the whole life cycle of the building, fully combine the life cycle cost with the building function, and systematically do the optimization work. The performance analysis model of building decoration energy-saving and environmental protection new materials based on the whole life cycle proposed in this paper can be used to analyse the various properties of various new materials. The experimental results show that the maximum error of the test results is 9.6%, the minimum error is 1.3%, and the average error is only 6.43%. This shows that the model built in this paper is reliable, and the calculated results are in good agreement with the experimental results, which can be used to analyse the performance of new building decoration energy-saving and environmental protection materials. The ideas and methods of solving the model established in this paper have important guiding significance, and can be used as a powerful reference tool for studying other solving methods.


Introduction
With the continuous improvement of the national economic level, people also put forward higher demands for the effect and quality of building interior decoration.In the context of this demand, the market structure it extends has the characteristics of diversification, which causes materials of different types and qualities to flow into the entire building decoration industry, which in turn leads to a series of environmental protection problems.At present, the problem of indoor gas environmental pollution caused by house decoration is more prominent.Many building decoration materials contain harmful substances such as formaldehyde, benzene and toluene.Many harmful gases are colourless and odourless, which are not easy to be detected.These volatile organic gases are emitted into the atmosphere and will have adverse effects on human health.As an important construction raw material for modern building decoration, new energy-saving and environmentally friendly materials for building decoration have the characteristics of green, healthy, energy-saving and environmental protection [1].The application of these materials in the overall architectural ornament conforms to the consumption concept of modern people and the concept of green and healthy life [2].With the continuous development of the current building functions, the concept of green environmental protection should be integrated into the architectural ornament design process.The application of new energysaving and environmental protection materials will further promote the development of the architectural decoration industry and improve the production environment [3].The construction industry is an industry with high pollution and high energy consumption.At present, the construction of construction projects in China is still in the stage of transformation from extensive to fine, and the pollution caused by construction projects every year is unpredictable [4].Therefore, at present, more and more builders have begun to pay attention to the environmental performance of building materials, and more experts and scholars have begun to intensify their research in this area, and achieved certain results.New building decoration materials have already occupied a relatively important position in the field of decoration design [5].
The so-called whole life cycle optimization of green building energy-saving design is to take the concept of whole life cycle optimization as the most reference, and fully coordinate the various elements in the combined project to ensure that the whole life cycle cost of the building can be greatly reduced [6].To realize the energy-saving optimization of green buildings, it is necessary to ensure that it runs through the entire life cycle of the building, fully combines the life cycle cost with the building function, and systematically optimizes it.Aiming at the problem that the evaluation standards and systems of green building materials are not yet perfect, the aim is to establish a set of standardized evaluation systems that are in line with reality, strong operability and practicality [7].When using the full life cycle theory to evaluate the environmental protection characteristics of building materials, the concept of "green" is proposed to express the greenness of building materials, which can give difficulties and suggestions for evaluation and operation [8].Theoretical research is the basis of practical application.With the development of technology and knowledge, green building materials are widely promoted and used in the construction industry, which provides a reference for the research on energy conservation and environmental protection evaluation of building materials [9].However, there are also some problems in environmental protection and energy saving of building decoration materials at present: At present, there is no unified standard for environmental protection in China's building decoration materials market, and there are many decoration materials that are not environmentally friendly.The reasons can be roughly divided into the following aspects: 1) The state has not given a corresponding reference basis for the environmental protection standards of building decoration materials, and has formulated a corresponding management system, which makes the environmental protection quality of building decoration materials uneven.There is also no more robust data parameters for reference [10].2) When a business owner buys decorative materials, in order to make a profit, the business will disregard whether the product actually has this function and whether it meets the environmental protection standards, and may falsely publicize the environmental protection degree and quality of the product to the user.Users will buy decorative materials that do not meet environmental protection standards.3) Many manufacturers of decorative materials do not produce according to the prescribed formula, which will result in substandard quality.In order to save expenses, enterprises cut corners in the use of materials, resulting in uneven product quality, which cannot be achieved at all.required standard.In addition, the existing technical level and production mode of the building materials industry cannot meet the needs of developing environmental protection and energy conservation.At present, China's residential buildings and public buildings still adopt an extensive production model with high input, high energy consumption, high pollution, low efficiency and low output [9,10].
This paper introduces the relevant content of the performance of new energy-saving and environmental protection materials for building decoration.Based on the whole life cycle theory, the general situation of energy-saving and environmental protection decoration materials is analysed, and an analysis model for the performance of new energy-saving and environmental protection materials for building decoration is established.
This paper studies the performance analysis of new energy-saving and environmentally friendly materials for building decoration based on the whole life cycle.The architecture is as follows: The first chapter is the introduction part.This part mainly expounds the research background and research significance of the performance analysis of new energy-saving and environmental protection materials for building decoration based on the whole life cycle, and proposes the research purpose, method and innovation of this paper.The second chapter mainly summarizes the relevant literature, summarizes the advantages and disadvantages, and puts forward the research ideas of this paper.The third chapter is the method part, which focuses on the research.The fourth chapter is the experimental analysis part.This part is experimentally verified on the dataset to analyse the performance of the model.

Related work
The concept of "passive architecture" was put forward by Professor Mr. Bo Adamson of Lund University in Sweden and Dr. Wolfgang Feist of the German Institute of Housing and Environment in 1988.The design concept and technical level of passive architecture in Europe (represented by Germany) are in the leading position in the world [11].In recent years, with the maturity of the application of life cycle theory in product design, life cycle theory has begun to penetrate into the field of architecture, which includes the whole process from design, production, construction, use, demolition to waste recycling.The introduction of life cycle theory is of great significance to the realization of real energy saving in architecture.
Li put forward the method of using simulation technology and establishing mathematical model to analyse the whole life cycle cost of the project, and put it into practical application, and solved the economic thickness of the insulation layer of the composite envelope of heating building by mathematical model.In addition, based on the theory of unsteady heat transfer, the research on the relationship between the economy of hollow wall and its insulation effect and the thickness of insulation layer has also been carried out [12].Kong X and others believe that only by introducing the concepts of the integrated management team of the whole life cycle and the manager of the whole life cycle to plan and control the objectives in the decision-making stage and the implementation stage can the smooth implementation of the model be ensured.With the same energysaving goal, the composite insulation wall has a lower comprehensive cost.As the thickness of the insulation layer is an important index that affects the insulation performance of the wall, some studies on the thickness of the insulation layer have appeared [13].Wang Lin, et al. integrated LCCA and LCA, and put forward the net environmental cost method, that is, in the case of adopting a certain technical scheme, the cost of unit environmental load income compared with the compared scheme can distinguish the advantages and disadvantages of the seawater source heat pump system, and the entropy weight decision method can be used to evaluate the environmental and economic benefits of the architectural design scheme, so as to optimize the design scheme [14].Jia Huali introduced LCCA theory into the economic benefit evaluation of green buildings, established an estimation model of life cycle cost and benefit of green buildings, and applied it to an actual case.The LCCA method is used to establish a comprehensive economic evaluation model of energy-saving buildings, and the model is applied to a practical project [15].Li Min used LCCA theory to make economic evaluation on the application of thermal insulation materials in building envelope, respectively evaluated the energy-saving and ordinary thermal insulation materials used in buildings, and obtained the economic benefits of energy-saving thermal insulation materials in the life cycle of buildings.Production or service function, the process of seeking the lowest life-cycle cost of a construction project through optimization, also includes the process of emphasizing the close connection between building function and life-cycle cost, and comprehensively analysing and optimising the building function and life-cycle cost to seek the maximisation of the life-cycle value of a building [16].Khalifeeh and others believe that the concept of building life cycle requires cost optimization to run through all stages of the life cycle.Specifically, it is in the planning and design, physical construction, operation and use, demolition and reconstruction of the building, under the conditions of meeting the same needs or achieving the same purpose [17].Dong Yan quantitatively expressed the environmental impact of building materials as two factors: environmental impact load and resource depletion coefficient, and quantitatively evaluated the impact of cement, steel and flat glass in the physical and chemical stage of life cycle.Yang Jianxin, etc. established a method and model to evaluate the environmental impact of Chinese products' life cycle, and adopted the target distance method to determine the weights of various environmental impact categories [18]; Di Maria et al. discussed and established the life cycle environmental impact assessment model and weight determination method based on social willingness to pay, and obtained the specific weight values of various environmental impact factors [19].
Relevant studies have achieved certain results in the research topic of architecture, but some studies still have the defects of not high enough pertinence and insufficient research content, which in turn leads to low effectiveness.And this subject is a new attempt on the performance of new energy-saving and environmentally friendly materials for building decoration based on the whole life cycle.According to the characteristics in the whole life cycle, the performance of building decoration energy-saving and environment-friendly materials is analysed.This is very meaningful for green decoration materials to achieve energy saving and environmental protection for the entire building space.

Overview of energy-saving and environment-friendly materials for building decoration
Building decoration materials refer to the decoration of the house after the completion of a project and before the owner enters.This part of decoration materials is not the main body of building materials.It is a kind of decoration made by people for their own living comfort and aesthetic requirements, which is related to people's spiritual requirements.Using this part of materials can beautify the indoor environment, create various functions to meet people's living needs, visually meet people's requirements, and facilitate people's activities in life.When the energy-saving and environmental protection decorative materials are applied, they themselves act on the interior decoration of buildings.Therefore, it is necessary to analyse the correlation points between the properties of the materials themselves and the whole building space structure, so as to maximize the energy conservation and environmental protection of the whole building space through the green decorative materials under the inherent building process, so as to truly give play to the ontological value of the green decorative materials.
3.1.1.Classification of energy-saving and environment-friendly materials for building decoration 1. Formaldehyde free wood-based panel.Compared with the traditional building decoration materials, the new formaldehyde free wood-based panel is a new decorative material that uses natural plants as raw materials and adopts special manufacturing technology to meet the national building decoration requirements and meet the national technical standards.This material has low formaldehyde content and will not cause great harm to the human body.It is a strong protection for long-term use inside the building.2. Environmentally friendly coating.A green, healthy, non-toxic and tasteless green health paint that does not cause harm to human body and furniture.For example, emulsion paint water-based paint is a new type of environmental protection paint, which is widely used in the decoration of the internal environment of the house.It can not only make the internal colour of the house vivid, but also protect the internal wall structure of the house and improve the overall safety performance of architectural ornament with high practicability.3. Green stone.As an important energy-saving and environment-friendly decorative material, green stone has the characteristics of no harm, no radiation and convenient processing.In the actual use process, it will not deteriorate due to the influence of external environmental factors, further reducing the probability of space pollution.

Advantages of new energy-saving and environmentally friendly materials for building decoration
Nowadays, new energy-saving and environment-friendly building decoration materials have higher safety performance, which can ensure that they will not be used in the process of use.In the event of a dangerous accident, secondly, new energy sources can use their own technology to effectively reduce environmental hazards to the surrounding environment.Finally, in terms of material selection, most of these environmentally friendly materials use renewable energy.Therefore, the phenomenon of pollution can be fundamentally eliminated [20].No harmful gas will be emitted, no harmful radiation will be produced, no mildew and rust will occur, and no harmful gas will be produced in case of fire; it has a health care effect on the human body.It can enhance the safety of building decoration projects and maintain people's health.Traditional building decoration construction materials not only consume relatively high energy consumption, but also contain many pollutants, and these pollutants will also volatilize in the air.For example, formaldehyde and benzene in decorative materials such as floors and doors and windows exceed the standard, which may cause It will cause harm to the physical and mental health of users.The application of new energy-saving and environmentally friendly materials for building decoration can effectively avoid the above problems and create a more comfortable and healthy living environment for people.It can reduce pollution and improve the natural environment.The fibre waste produced by agricultural plants can be used to produce man-made fibreboard, cardboard, light building materials and other building decoration composite materials.Crop straw fibre cement based composite is a new type of green building materials.China is a large agricultural country, and the crop straw resources are relatively rich.Compared with the wood that takes years or decades to grow, it is more in line with the needs of sustainable development.

Energy-saving design of energy-saving and environmentally-friendly new materials for building decoration throughout the life cycle
The whole life cycle is a dynamic and comprehensive process, and an in-depth understanding of the whole life cycle is the basis for proposing the green degree of the whole life cycle.The research on the green degree of building materials from the perspective of the whole life cycle is a multi-dimensional analysis of time and space, which is scientific.
The green degree of the whole life cycle of building materials is a visual representation of researching green building materials and evaluating them.Different from traditional decorative materials, new building materials have the characteristics of green, environmental protection, energy saving and health.Green and healthy environmental protection new materials can not only protect human health, but also reduce the harm of traditional formaldehyde products to the environment.Environmental impact assessment obtains environmental load data through quantitative surveys and evaluates the severity of environmental damage caused by various environmental pollution factors during the production and use of materials.For different types of materials, their damage or impact on the environment is different.In order to quantitatively describe the degree of such damage or influence, a physical quantity, namely the environmental load of materials, needs to be introduced.The impact analysis evaluation method sets evaluation indicators.There are various methods of environmental impact analysis and evaluation, but each method basically includes four steps: classification, characterization, normalization and evaluation.The specific parameters and content of the environmental impact assessment are shown in Figure 1.
The construction of the green degree evaluation framework of building materials should be based on the whole life cycle theory and comprehensively consider the various processes of materials.When constructing a greenness evaluation framework, certain principles should be followed.The first is comprehensiveness, all indicators that affect greenness must be fully considered; the second is representativeness, there are many indicators that affect greenness, some of which are universal, and the selection of representative indicators can simplify the evaluation process; the third is operability, The construction of the index framework must be combined with the actual situation; finally, it is necessary to make it clear that the purpose of constructing the evaluation framework is to evaluate the greenness, and the framework should help to obtain the final comprehensive greenness.The whole-life green degree evaluation index of building materials should be comprehensively analysed at all stages of raw material collection, transportation, production, construction, use, and demolition.In the evaluation process, the collection and transportation stages are incorporated into the building materials production stage for index calculation.The input and output relationship between materials and the environment during their entire life cycle is roughly shown in Figure 2.
The materials selected for the design are based on the materials of the basic components of the building.The outer walls are KPI hollow bricks with a thickness of 210, and  the roof is an upright membrane waterproof and thermal insulation flat roof.Emphasis is placed on the name, density, thermal conductivity and heat storage capacity of materials.The specific structural forms adopted by the building components are shown in Table 1.
Building energy-saving design and energy-saving building design are two different concepts, which can be divided into two methods according to the difference of building energy-saving indicators: the first is the prescriptive index, which stipulates a limit value for the heat transfer coefficient, wall penetration ratio and shape coefficient of building envelope, including roof, window and wall, as well as the minimum ground energy efficiency index of air conditioning, daylighting, lighting system and heating equipment.The scope of the two is different.Building energy conservation covers all the scope of building energy consumption.For residential buildings with centralized heating, it mainly includes boiler room, pipeline transportation system and energy consumption building efficiency.Energy saving building is a concept proposed for the heat consumption performance of the building itself, which is included in the scope of building energy conservation.The second is the comprehensive index control of energy conservation, a comprehensive control method that requires the overall energy consumption of buildings to reach an index.See Figure 3 for the classification of energy-saving design of new energy-saving and environmentally friendly materials for building decoration in the whole life cycle.
When designing passive buildings, the main purpose is to reduce building energy consumption, paying higher economic costs in the initial construction phase of the building in exchange for energy savings in the building operation phase.The design of passive buildings focuses on environmental benefits.The current construction projects analyse the economic and environmental benefits separately.There is no unified method for comprehensive evaluation of the two, and there is no standard for weighing the two.Most enterprises often ignore environmental benefits in order to maximize their benefits.In order to comprehensively evaluate economic and environmental benefits in a unified way, this paper uses emission trading theory to monetize environmental benefits, convert environmental impacts into monetary forms, and control environmental pollution and alleviate environmental problems while considering economic benefits.
Building decoration energy saving is mainly considered from three aspects to achieve the effect of building energy saving, mainly including the application of energy-saving materials, rational design, and the application of advanced technology.In these three aspects, reasonable design is the most crucial factor.If you want to fully consider the energy-saving effect of buildings and live a comfortable life, you often need rich design experience and advanced design concepts.Energy saving is a very important link in building decoration.The area of the external window accounts for about 20% of the total window area.The external window has the functions of heat preservation and heat insulation, reducing indoor air conditioning heat and heating energy consumption.Energy conservation of curtain walls is also very important, especially glass curtain walls and metal curtain walls.The rational design mainly includes the overall architectural planning and the thermal insulation design of the peripheral structure, which mainly includes the proportion of opening windows and so on.In the architectural planning and design stage, factors such as the orientation of the building and the distance between the buildings are mainly considered.If the distance between the buildings is too large, the economic aspect is not very reasonable.If the distance is too small, the room cannot receive sunlight in winter.Operating costs will be too high.In summer, in planning and design, it is necessary to consider the local wind direction as much as possible to avoid the room being too hot and humid, making it extremely uncomfortable to live in.In the initial design stage, the important factor of building energy efficiency must be fully considered, not only to ensure economical rationality, but also to ensure high-quality comfort.

Energy-saving analysis model of new materials for building decoration energysaving and environmental protection based on the whole life cycle
The building design with low energy consumption and high comfort mainly includes four factors: thermal function environment, ecological environment, air quality and light environment.The internationally mature low-energy building technology includes the following aspects: the active energy building foundation system, combined with the ground source heat pump system, provides the main heating and cooling energy of the building, effectively saves the operating cost of the building, and the concrete floor radiant heating and cooling system can provide a high comfortable environmental replacement fresh air system.The standard floor adopts a unit module replacement fresh air device to provide a healthy fresh air intelligent outdoor sunshade system with sufficient indoor space, create a comfortable thermal environment and a comfortable light environment, while achieving energy-saving, environment-friendly and efficient thermal insulation exterior wall system.Other technologies include efficient roofing technology, complete set of toilet back drainage technology, integrated solar building design, temperature screen energy-saving glass and solar photovoltaic power generation, etc. Buildings improve comfort and reduce energy consumption.China has a misunderstanding about intellectualization, thinking that intellectualization depends on computers and robots.In fact, it is not.Building intellectualization has nothing to do with electronics.Spain's intelligent buildings do not have any high-tech components.In summer, the sun avoids direct sunlight on the room, saving refrigeration resources.In winter, with the help of a device to expand the sunshine, it is conducive to heating and reduce energy consumption.
Based on the whole life cycle theory, this section mainly establishes the energy consumption model of new building decoration energy-saving and environmental protection materials, and makes some assumptions about this model.The calculation model of energy consumption of new energy-saving and environment-friendly materials for building decoration based on the whole life cycle is as follows: A stochastic process is the regularity of one or a finite number of random variables on a probability space ðx, c, pÞ: Define X on x and take the value of the function of the set of real numbers.If for any real number, o : Xð}Þ x È É , then XðoÞ is called a random variable, and the function FðxÞ ¼ P o : XðoÞ x È É is called the distribution function of the random variable.If there is a function: Classically, "1" or "0" is used to indicate "belongs to" or "does not belong to", while fuzzy theory proposes to use membership degree to express this fuzzy relationship, membership degree is a continuously changing value from 0 to 1, the fuzzy set in the universe It can be expressed by the element u and the degree of membership, as follows: Statistical sampling is achieved by computer to obtain the statistical distribution of the target object, so that the target variable can be estimated through a large number of independent repeated calculations.Since the MC simulation is repeated sampling experiments from the same parent, when there are enough experiments, the formula of the law of large numbers is satisfied.
In the formula, X i ðx 1 , x 2 , x 3 , . . ., x k Þ is an independent statistical random variable, and the expected value is Eðx k Þ: Using the method of combining mathematical programming and MC simulation, the risk quantification of the most variable parameters in the objective function, such as fuel cost and interest rate, is carried out, and the possibility distribution and optimal plan of optimal investment are given.The energy saving distribution probability can be calculated using the MC computer simulation method.For the unknown variable parameter h, it can be regarded as a random variable to describe its uncertainty, and its value range and law can be expressed in the form of probability distribution.Bayesian theory is a combination of overall information, prior information and sample information, and both probability and statistical inference methods are used.Assuming that pðxjhÞ represents the probability density function of the random variable parameter h under the given conditions x, according to the prior distribution pðhÞ of the parameter h, suppose a sample is generated from the prior distribution, and a sample is generated from the prior distribution, and the probability of its occurrence is Proportional to the following joint density function, the likelihood function is as follows: The joint distribution of the sample and parameter I is: Usually there is an error between the model and the actual value, and the model can be corrected by the Bayesian method.Assuming that the deviation between the simulated value and the actual value is the model deviation (compared with the actual value), it can be expressed as follows: Among them, the model expected value is: Assuming the probability of the observed data and the probability of the observed data itself, let x ¼ a 1 , a 2 , . . ., a m f g be an item to be classified, and each feature attribute has a category set C ¼ y 1 , y 2 , . . ., y n f g , and the category with the highest probability and the posterior probability are calculated as: The multiple linear regression model can use the least squares method to estimate the model parameters and conduct statistical tests, as follows: The purpose of the clustering algorithm is to divide n objects into k different clusters according to their respective attributes, and then decide whether to merge the clusters through the interconnectivity and closeness of the clusters.For the decision-making optimization problem of energy-saving renovation of buildings in the study area, different cluster analysis requirements it also involves the horizontal grouping and combination promotion of different energy-saving measures.The criterion function used is: In this paper, the Monte Carlo simulation method is used to establish the prediction model.Monte Carlo method, also known as random simulation statistical table test method, is a numerical calculation method that uses computers to study the probability of risk occurrence or risk loss based on statistical theory.It is a widely used and relatively accurate method in the current risk analysis of engineering projects.At the same time, the model combines important analysis methods such as probability analysis, Bayesian estimation, stochastic process, fuzzy algorithm, interval estimation, etc. to quantify the uncertainty parameters of building materials, and study and predict the energy saving of new building materials under given constraints.The problem of reconstruction provides a theoretical basis for decision-making and optimization of energy-saving and environmentally-friendly new materials for building decoration.

Result analysis and discussion
For multifactor experiments, the simplest and most commonly used experimental design method is the orthogonal experimental design.First of all, the purpose of the experiment is clarified, the evaluation index is determined, and the level of the factor is determined.For the part of experiment design and data processing, it is the basic procedure of design.In this paper, the whole life cycle energy consumption of autoclaved lime-sand bricks, autoclaved aerated concrete blocks, autoclaved sand aerated concrete blocks and foam concrete is studied.Factors of energy consumption: external wall heat transfer coefficient, roof heat transfer coefficient, floor heat transfer coefficient, window heat transfer coefficient.The orthogonal test method is used for research, and 4 different levels are selected for different influencing factors.The influencing factors and level values are shown in Table 2.
Generally speaking, the influence of the level change of each factor on the test results is unequal, so the range of each column is generally unequal.The index has a greater change in value, so the column with the largest range is the factor whose level has the greatest impact on the test results, that is, the most important factor.In order to verify the feasibility of the energy-saving algorithm based on the whole life cycle building decoration energy-saving and environmental protection new material, we use the orthogonal test method to evaluate the algorithm in the experiment.In this chapter, experiments are carried out, four levels are selected for each influencing factor, and the orthogonal table is used to calculate the change of the load number of the designed building for each experiment, as shown in Figure 4.The cumulative total load throughout the year increases significantly as the heat transfer coefficients of the exterior walls and windows increase.In the initial stage of the increase of the heat transfer coefficient of the roof and floor, the cumulative total load of the year gradually decreases, and as the heat transfer coefficient continues to increase, the cumulative total load of the year begins to increase.However, from a numerical point of view, the annual cumulative total load is not greatly affected by the change of the heat transfer coefficient of the roof, and the maximum range is only from 1.085 to 1.1325, the change range is 0.0475, and the change range of the unit heat transfer coefficient is 0.594.The first category is single-material wall panels, which are pure GRC wall panels and pure C15 lightweight concrete wall panels.Their shrinkage deformation is mainly free shrinkage, and their strain development curves are shown in Figure 5; the second is PC-GRC composite wallboard, which are three wallboards that have undergone three interface treatments of bare joint, steel mesh, and roughening.Their shrinkage is due to the combination of the two materials.Constraint contraction.Their strain development curves are shown in Figure 6.
Taken together, the test wallboard has a common feature: generally speaking, the strain value of the material first increases to a positive value, thus entering the stretching stage, and then gradually decreases to a negative value, thus entering the contraction stage.After entering the contraction stage, the trend is to increase slowly at first, then the growth rate becomes slower and slower, and finally tends to be flat.However, it can also be clearly seen that the strain values of two groups of free shrinkage wallboard are much larger than those of three groups of constrained composite wallboard.At the same time, the peak value of strain and the time when the three groups of composite wallboard with restrained shrinkage are different.It shows that the strain change of free shrinkage wallboard is very different from that of constrained composite wallboard, and the composite wallboard poured under different interface treatment methods has different effects on the strain change of the two materials.The maximum error between the calculated results and the experimental results by ABAQUS is 9.6%, the minimum error is 1.3%, and the average error is only 6.43%.In order to reflect the performance of the algorithm more intuitively, the temperature distribution of different walls was tested.The temperature distribution diagram of the algorithm is shown in Figure 7. From the temperature distribution map of each node, it is more obvious that under the same conditions, when the traditional block has internal insulation, the temperature value in the wall varies greatly, and the thermal insulation of autoclaved lime sand brick is poor.Under the same conditions, when autoclaved sand aerated concrete block and foam concrete are self-insulated, the thermal insulation performance is still good.The internal temperature of autoclaved lime sand brick wall is the highest, and the thermal insulation performance is the worst.The internal temperature of the new concrete wall is evenly distributed, and the temperature is low, and the heat insulation performance is good.The new material air concrete block is to use thermal insulation mortar for external insulation treatment of external walls.From the temperature distribution diagram, it can be seen that the temperature changes greatly in the thermal insulation mortar layer.Because the thermal conductivity of autoclaved sand aerated concrete block and foam concrete is small, they are  used as wall self-insulation system in practical engineering applications.Therefore, their energy-saving performance is still much better than the other two.While the traditional foam concrete and autoclaved sand aerated concrete blocks have similar energy conservation, foam concrete is slightly better.Figure 8 shows the accuracy of different models.
It can be seen that the energy-saving analysis model of building decoration energy-saving and environmental protection new materials established in this paper has higher accuracy and timeliness.This verifies the feasibility and effectiveness of the energy-saving analysis algorithm of new building decoration energy-saving and environmental protection materials based on the whole life cycle, thus achieving the expected effect of this paper.

Conclusions
As people put forward higher demand for the effect and quality of building interior decoration, the attention to building energy-saving materials has become higher and higher.From a long-term perspective, building energy conservation not only brings considerable economic benefits, but also saves a lot of energy for the whole society.Therefore, it is necessary to analyse the performance of new energy-saving and environmentally friendly materials for building decoration.The performance analysis model and solution method of new building decoration energy-saving and environmental protection materials based on the whole life cycle proposed in this paper can be used to analyse the various properties of various new materials, which improves the ideal judgment for the scientific and efficient selection and optimization of building energy-saving design schemes.The experimental results show that the maximum error of the test results is 9.6%, the minimum error is 1.3%, and the average error is only 6.43%.This shows that the model built in this paper is reliable, and the calculated results are in good agreement with the experimental results, which can be used to analyse the performance of new building decoration energysaving and environmental protection materials.The focus of this study is on the economy of new materials for energy conservation and environmental protection of building decoration, almost without considering the ecological problems of buildings.If the technical, economic and ecological aspects of building energy conservation are combined, it will be more conducive to the optimization and promotion of building energy conservation.

Figure 1 .
Figure 1.Specific parameters and content of environmental impact assessment.

Figure 2 .
Figure 2. The input and output relationship with the environment in the whole life cycle process.

Figure 5 .
Figure 5. Strain development curve under free contraction in Test 1.

Figure 7 .
Figure 7. Temperature distribution of corresponding nodes of the wall.

Figure 6 .
Figure 6.Strain development curve under free contraction in Experiment 2.

Figure 8 .
Figure 8. Accuracy of different models.

Table 2 .
Values of influential factors and levels.
Figure 4. Changes in the number of loads.