Pilot Fracture Tests of Special Fine-Grained Composites

Iva Rozsypalová; Emília Bystrianska; Ondřej Koutný; Petr Daněk; Petr Frantík; Zbyněk Keršner

doi:10.4028/www.scientific.net/SSP.322.3

Paper Titles

Preface

Pilot Fracture Tests of Special Fine-Grained Composites
p.3

Methodology of Controlled Crack Introduction in Cementitious Materials
p.9

Influence of the Method of Production of Test Specimens on the Result of the Frost Resistance Test of Concrete
p.17

Determination of a Suitable Moment for Formwork Removal from a Concrete Structure Using Rebound Hammer Test Methods
p.23

The Analysis of the Intensity and Vibration Time on the Mechanical Properties of Hardened Concrete
p.28

Concrete in the Environment of Agricultural Buildings
p.35

Effects of Concrete Compositions on the Elastic Modulus
p.41

Comparison of Methods for Crack Development State for Steel Fibre Reinforced Concrete
p.48

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Pilot Fracture Tests of Special Fine-Grained Composites

Abstract:

Mechanical fracture parameters were obtained for special fine-grained cement-based composites from three-point bending tests. A total of four sets of composite specimens were tested. All of the sets of composites were based on a general recipe and differ in the amount of high-strength aggregate and/or dispersed steel fibres present. Standardized prism specimens with a nominal size of 40 × 40 × 160 mm were used for the fracture tests after 131 days of curing. An initial notch was cut in the centre of the prisms with a depth approximately equal to one third of the specimen’s height. Three specimens from each set of composites were tested in the three-point bending fracture test configuration. Load versus midspan deflection diagrams were recorded. Experimentally obtained load vs displacement diagrams were corrected and analysed using the Effective Crack Model, the Work-of-Fracture method and an independent identification technique using numerical modelling. The most important mechanical fracture parameters, such as static modulus of elasticity, effective fracture toughness, specific fracture energy and effective tensile strength, were determined. Compressive and splitting tensile strength values were obtained from the halves of the specimens left over after the bending tests.

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Periodical:

Solid State Phenomena (Volume 322)

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3-8

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.322.3

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Online since:

August 2021

Authors:

Iva Rozsypalová*, Emília Bystrianska, Ondřej Koutný, Petr Daněk, Petr Frantík, Zbyněk Keršner

Keywords:

Fracture Test, Load–Displacement Diagram, Mechanical Fracture Parameters, Numerical Model Identification, Ultra-High Performance Composite

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