防灾减灾工程学报2026，Vol.46Issue(2)：454-466,13.DOI:10.13409/j.cnki.jdpme.20250423001
羧甲基纤维素钠改进MICP固化效果的试验研究
Experimental Study on Improvement of MICP Reinforcement Effect by Sodium Carboxymethyl Cellulose
摘要
Abstract
To enhance the application effectiveness of microbially induced calcium carbonate precipita-tion(MICP)technology in soil reinforcement,this study introduced sodium carboxymethyl cellulose(CMC-Na)as an additive,and conducted laboratory experiments to investigate the influence of CMC-Na content(0-0.8%)on the mechanical properties and microstructure of MICP-treated sandy soil.The experimental results showed that the optimal effect was achieved when the CMC-Na content was 0.2%.The mechanism lay in the fact that CMC-Na could increase the viscosity of the cementation so-lution and slow the infiltration rate,thereby increasing calcium ion utilization by 11.6%and increasing calcium carbonate production by 1.5 times.Macroscopic performance tests showed that at this con-tent,the sand column achieved an unconfined compressive strength of 3 157.5 kPa(9.8 times that of the blank control group),the permeability coefficient decreased by 61.2%,and the longitudinal distri-bution of calcium carbonate became more uniform.Microscopic analysis further revealed that the calci-um carbonate crystals formed under this condition were vaterite,which,compared with the calcite formed without CMC-Na,filled the pores between sand particles more uniformly and formed a dens-er cementation structure.This study provides new insights for the optimization and practical applica-tion of MICP technology.关键词
微生物诱导碳酸钙沉积/外加剂/羧甲基纤维素钠/石英砂/土体加固Key words
microbially induced calcium carbonate precipitation/additive/sodium carboxymethyl cellulose/quartz sand/soil reinforcement分类
建筑与水利引用本文复制引用
郭子豪,白兰兰,张丽瑶,朱琪,罗晨玮,彭劼..羧甲基纤维素钠改进MICP固化效果的试验研究[J].防灾减灾工程学报,2026,46(2):454-466,13.基金项目
国家自然科学基金(51578214)、江苏省交通运输厅科技成果转化项目(2021QD07)资助 （51578214）
