岩土工程学报2024，Vol.46Issue(z2)：72-76,5.DOI:10.11779/CJGE2024S20001
EICP固化轮胎颗粒混合黏土的强度特性及微观机理
Mechanical properties and microscopic mechanisms of enzyme-induced calcium carbonate precipitation(EICP)-reinforced clay mixtures with rubber particles
摘要
Abstract
The utilization of enzyme-induced carbonate precipitation(EICP)to enhance the strength of rubber particles mixed with clay as lightweight backfill materials can effectively absorb waste tires and promote the sustainable utilization of rubber particles in geotechnical engineering.In this study,the strength characteristics and mechanism of the composite-modified clay are systematically investigated using the EICP technique combined with rubber particles.The results show that the EICP treatment can improve the unconfined compressive strength of the mixed clay with tire particles,and the best treatment effect was achieved when the concentration of the cementation solution is 0.5 mol/L.As the concentration of cementation solution increases,the CaCO3 content also increases,but the conversion rate decreases.The strength and modulus of elasticity of the EICP-treated clay mixed with rubber particles first increase and then decrease with the content of rubber particles,and the optimal content of rubber particles is 5%.The optimal amount of rubber particles to incorporate is 5%.The microstructural analysis reveals that the CaCO3 produced by the EICP significantly improves the bonding between rubber particles and soil particles,while also filling the pores.The results of the study can provide a theoretical basis for the utilization of the EICP-treated rubber particles mixed with clay as filling materials.关键词
酶诱导碳酸钙沉淀/轮胎颗粒/力学特性/微观机理Key words
enzyme-induced calcium carbonate precipitation/rubber particle/mechanical property/microscopic mechanism分类
建筑与水利引用本文复制引用
马强,李蒙,周鑫隆,习磊,孙君..EICP固化轮胎颗粒混合黏土的强度特性及微观机理[J].岩土工程学报,2024,46(z2):72-76,5.基金项目
国家自然科学基金项目(52078194) （52078194）
湖北省杰出青年科学基金项目(2022CFA043) （2022CFA043）
湖北省高校优秀中青年科技创新团队项目(T2022010) （T2022010）
