Synergistic Effect of Microbial-Induced Carbonate Precipitation Modified with Hydroxypropyl Methylcellulose on Improving Loess Disintegration and Seepage Resistance.

IF 4.9 3区工程技术 Q1 POLYMER SCIENCE Polymers Pub Date : 2025-02-19 DOI:10.3390/polym17040548

Xingyu Wang, Hong Sun

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Abstract

Microbial-induced carbonate precipitation (MICP) is an eco-friendly soil stabilization technique. This study explores the synergistic effects of incorporating hydroxypropyl methylcellulose (HPMC) into the MICP process to enhance the disintegration and seepage resistance of loess. A series of disintegration, seepage, scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP) tests were conducted. The results show that HPMC forms protective membranes around calcium carbonate crystals produced by MICP and soil aggregates, which enhance cementation, reduce soluble salt dissolution, promote soil particle aggregation, and seal pore structures. At the optimal 0.4% HPMC dosage, the maximum accumulative disintegration percentage and the disintegration velocity decreased to zero. Additionally, HPMC-modified MICP reduced the amount, size, and flow velocity of seepage channels in loess. The integration of MICP with HPMC provides an efficient and sustainable solution for mitigating loess disintegration and seepage issues.

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羟丙基甲基纤维素改性微生物诱导碳酸盐沉淀对黄土崩解和抗渗性能的协同作用。

微生物诱导碳酸盐沉淀（MICP）是一种生态友好的土壤稳定技术。本研究探讨了羟丙基甲基纤维素（HPMC）在MICP过程中的协同作用，以增强黄土的崩解性和抗渗性。进行了一系列的崩解、渗流、扫描电镜（SEM）和压汞孔隙度（MIP）测试。结果表明：HPMC在MICP与土壤团聚体生成的碳酸钙晶体周围形成保护膜，增强胶结作用，减少可溶性盐的溶解，促进土壤颗粒聚集，密封孔隙结构；当HPMC的最佳投加量为0.4%时，最大累积崩解率和崩解速度降至零。此外，hpmc改性的MICP降低了黄土中渗流通道的数量、尺寸和流速。MICP与HPMC的结合为缓解黄土崩解和渗流问题提供了有效和可持续的解决方案。

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来源期刊

Polymers POLYMER SCIENCE-

CiteScore

8.00

自引率

16.00%

发文量

4697

审稿时长

1.3 months

期刊介绍： Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.