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冻融循环对石灰稳定玄武岩纤维增强黄土强度和波速的影响

Effects of Freeze-Thaw Cycles on Strength and Wave Velocity of Lime-Stabilized Basalt Fiber-Reinforced Loess.

作者信息

Wang Wensong, Cao Guansen, Li Ye, Zhou Yuxi, Lu Ting, Zheng Binbin, Geng Weile

机构信息

State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China.

State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China.

出版信息

Polymers (Basel). 2022 Apr 4;14(7):1465. doi: 10.3390/polym14071465.

DOI:10.3390/polym14071465
PMID:35406338
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9003549/
Abstract

Basalt fiber is a new environmentally-friendly material with excellent potential for soil reinforcement in geotechnical engineering construction. This study explores the effects of freeze-thaw cycles on the unconfined compressive strength (UCS) and P-wave velocity () of lime-stabilized basalt fiber-reinforced loess. Reinforced loess samples with different proportions of basalt fiber and lime were subjected to 0, 1, 5, and 10 freeze-thaw cycles, and their UCS and were subsequently measured. The test results showed that the addition of basalt fiber and lime to loess could enhance strength and improve resistance against freeze-thaw damage, and the freeze-thaw damage of reinforced loess decreases with the increase of basalt fiber content and length. A relationship between UCS and of the reinforced samples was obtained for the same number of freeze-thaw cycles, and this relationship exhibited linear characteristics. The fitting results indicate that the can be used to estimate the UCS after freeze-thaw damage. The research results not only have important practical significance in the application of basalt fiber in geotechnical engineering but also provide a reference for the non-destructive testing of the strength of loess after freeze-thaw cycles.

摘要

玄武岩纤维是一种新型环保材料，在岩土工程建设中具有优异的土壤加固潜力。本研究探讨了冻融循环对石灰稳定玄武岩纤维增强黄土的无侧限抗压强度（UCS）和纵波速度（）的影响。对不同比例玄武岩纤维和石灰的增强黄土试样进行了0、1、5和10次冻融循环试验，随后测量了它们的UCS和。试验结果表明，在黄土中添加玄武岩纤维和石灰可以提高强度并改善抗冻融破坏能力，增强黄土的冻融损伤随玄武岩纤维含量和长度的增加而减小。对于相同冻融循环次数的增强试样，得到了UCS与之间的关系，且该关系呈现线性特征。拟合结果表明，可用于估算冻融损伤后的UCS。研究结果不仅在玄武岩纤维在岩土工程中的应用方面具有重要的实际意义，而且为冻融循环后黄土强度的无损检测提供了参考。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5666/9003549/e8b26c3fbc6d/polymers-14-01465-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5666/9003549/5b7aa6ef1a20/polymers-14-01465-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5666/9003549/d6ff47d9ac16/polymers-14-01465-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5666/9003549/b154d1d6f5cb/polymers-14-01465-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5666/9003549/e8b26c3fbc6d/polymers-14-01465-g012.jpg

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