Desiccation cracking behavior of discrete fiber mixed with clay material

IF 3.7 2区工程技术 Q3 ENERGY & FUELS

Geomechanics for Energy and the Environment Pub Date : 2026-03-01 Epub Date: 2026-01-05 DOI:10.1016/j.gete.2026.100788

Changde Yang , Yang Chen , Binbin Yang

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引用次数: 0

Abstract

This study introduces the results of evaporation cracking test on soil with different discrete polypropylene fiber content (PPFC). Changes in the cracking characteristics are quantitatively analyzed by using digital image processing technology. The results indicate that the fractal dimension (FD) of the cracking process can be divided into three stages. Stage A is defined as the rapid cracking stage when the rate of cracking increases rapidly with a PPFC of 0.2 %. However, the rate of cracking decreases with further increases in PPFC. In Stage B, the FD of cracks with a PPFC of 0.2 % and 0.7 % tends to be stable at first, while that of cracks with a PPFC less than 0.2 % increases gradually with time. The FD approaches a constant in Stage C and its value decreases with increases in the PPFC. The characteristics of the average moisture content of soil with different PPFC along with the drying time show a close agreement with those when the PPFC is less than 0.2 %. It is found that fibers can restrain the expansion of soil which reduces cracking and evaporation of free water which results in a delay of the evaporation of the bounded water. The 0.2 % PPFC is the optimal ratio for inhibiting Xinjiang clay.

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离散纤维与粘土混合材料的干燥开裂行为

介绍了不同离散聚丙烯纤维含量（PPFC）土壤的蒸发开裂试验结果。利用数字图像处理技术定量分析了裂纹特征的变化。结果表明，裂纹过程的分形维数（FD）可划分为三个阶段。阶段A定义为快速开裂阶段，当PPFC为0.2 %时，开裂速率迅速增加。然而，随着PPFC的进一步增加，开裂率降低。在B阶段，当PPFC为0.2 %和0.7 %时，裂缝的FD开始趋于稳定，而当PPFC小于0.2 %时，裂缝的FD随着时间的推移逐渐增大。FD在C期接近一个常数，其值随着PPFC的增加而降低。不同PPFC条件下土壤平均含水率随干燥时间的变化特征与PPFC < 0.2 %时基本一致。结果表明，纤维可以抑制土体的膨胀，减少土体的开裂和自由水的蒸发，从而延缓有界水的蒸发。0.2 %的PPFC是抑制新疆粘土的最佳配比。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geomechanics for Energy and the Environment Earth and Planetary Sciences-Geotechnical Engineering and Engineering Geology

CiteScore

5.90

自引率

11.80%

发文量

期刊介绍： The aim of the Journal is to publish research results of the highest quality and of lasting importance on the subject of geomechanics, with the focus on applications to geological energy production and storage, and the interaction of soils and rocks with the natural and engineered environment. Special attention is given to concepts and developments of new energy geotechnologies that comprise intrinsic mechanisms protecting the environment against a potential engineering induced damage, hence warranting sustainable usage of energy resources. The scope of the journal is broad, including fundamental concepts in geomechanics and mechanics of porous media, the experiments and analysis of novel phenomena and applications. Of special interest are issues resulting from coupling of particular physics, chemistry and biology of external forcings, as well as of pore fluid/gas and minerals to the solid mechanics of the medium skeleton and pore fluid mechanics. The multi-scale and inter-scale interactions between the phenomena and the behavior representations are also of particular interest. Contributions to general theoretical approach to these issues, but of potential reference to geomechanics in its context of energy and the environment are also most welcome.