摘要
以添加巴氏芽孢八叠球菌或其脲酶的水泥砂浆试块为研究对象,分别使用营养液(尿素-乙酸钙溶液)、细菌培养液和水对水泥砂浆试块进行养护,通过单轴抗压强度、劈裂抗拉强度和冻融循环等试验研究其强度和耐久性的变化,并通过压汞试验研究其微观孔隙结构。结果表明:添加微生物后,水泥砂浆的抗压和抗拉强度都有提高,抗压、抗拉强度提高最多的分别是对照组的1.47倍和1.60倍;添加菌液在水中养护的水泥砂浆试块的抗冻融能力有较大提高。
The bacteria Sporosarcina pasteurii （S. p） solution and the urease of S. p was added into the cement mortar. The urea-calcium acetate solution, bacterial culture medium and water were used to cure specimens. The uniaxial compressive test, the split tensile strength test and freeze-thaw cycling test were carried out to study the changes of their strength and durability . The mercury intrusion porosimeter was used to understand the microstructure of microbial cement mortar. The results showed that the microbial cement mortar had an increase in strength, the highest compressive strength increased by 47.22% , the highest tensile strength increased by 60. 39%. In addition, the microbial cement mortar specimen cured in water had an excellent performance in freeze-thaw cycle test.
出处
《工业建筑》
CSCD
北大核心
2015年第7期42-47,共6页
Industrial Construction
基金
国家自然科学基金项目(50908122
51078202)
关键词
微生物诱导碳酸钙沉淀
水泥砂浆
抗压强度
抗拉强度
耐久性
microbially induced carbonate precipitation
cement mortar
compressive strength
tensile strength
durability
