Predicting the chemo-thermo-hydro-mechanical behaviors of cement stabilized rammed earth materials from the design stage

Zhang, Xiang and Nowamooz, Hossein 2023. Predicting the chemo-thermo-hydro-mechanical behaviors of cement stabilized rammed earth materials from the design stage. Springer.

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Abstract

To understand the general coupled chemo-thermo-hydro-mechanical (CTHM) behavior of CSRE, this work reviews the cement hydration process in CSRE and its influence on the thermo-hydro-mechanical (THM) behaviors of CSRE materials. It has been observed that the unconfined compressive strength of CSRE increases with material dry density. Compared to other factors such as grain size distribution, dry density, and water content, the effect of cement hydration on the variations of the soil water retention curve (saturation-suction scale) and thermal conductivity is not significant. The free water consumed in the hydration process exists in the form of chemically reacted water and gel water. Moreover, cement hydration increases the mechanical resistance of CSRE over time and is influenced by the curing conditions. The characteristics of CSRE vary considerably among different experimental works reported in the literature. The combined effect of initial water content, initial dry density, initial grain size distribution, initial cement content, curing conditions and curing time needs to be considered together from the design stage of CSRE material. The lack of a global view of all types of CSRE materials poses great difficulties in making a worldwide acceptable standard for CSRE materials. Consequently, based on the experimental results from literature review, a finite element numerical framework is proposed to reproduce a typical CSRE material as well as to globally explain the complex coupled CTHM properties of CSRE from the design stage.

Item Type:	Other
Date Type:	Published Online
Schools:	Earth and Environmental Sciences
Publisher:	Springer
ISSN:	1359-5997
Date of Acceptance:	15 April 2023
Last Modified:	07 Jun 2023 08:45
URI:	https://orca.cardiff.ac.uk/id/eprint/160207

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