Elsevier

Applied Clay Science

Volume 9, Issue 3, September 1994, Pages 151-164
Applied Clay Science

Research paper
Effects of methods of drying on the engineering behavior of clays

https://doi.org/10.1016/0169-1317(94)90017-5Get rights and content

Abstract

This research was conducted to investigate the effect of drying methods on the basic physical and engineering properties of soils. The properties considered were grain size distribution, consistency limits, swelling, and compressibility characteristics, as well as the unconfined compressive strength. To accomplish the objectives of this study, five soils with a wide range of plasticity were selected from northern Jordan and subjected to three different drying schemes before conducting the laboratory work. These schemes basically encompassed air drying the soils (25°C±3°C), oven drying at 60°C, and 110°C.

The experimental results showed that drying at 110°C removed all of the free water and most of the clay attached water while 60°C removed part of this latter water. On the other hand, air drying caused a minimal loss of attached water. Loss of this type of water (which is considered an integrated part of the soil) resulted in a destruction of the soil structure and consequently affecting the soil properties. Additionally, it was noted that drying at 110°C and 60°C caused soil aggregation and thus resulted in a marked reduction in liquid limit, plasticity index, and clay content. Although the drying temperature did not change soil classification, it was observed that higher temperatures caused the soil to behave in a less plastic manner. The results of the swell and consolidation tests indicated that both swell potential and swell pressure were reduced with drying temperature while the compression index and coefficient of compressibility increased. Furthermore, the unconfined compressive strength was found to decrease with increasing drying temperature.

References (5)

  • P.V. Lade et al.

    Soil Drying by Microwave Oven

  • T.W. Lambe

    How dry is a dry soil?

There are more references available in the full text version of this article.

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