火山岩负载巴氏芽孢杆菌对水工混凝土的裂缝修复作用研究  

Study on the Concrete Crack Repair Using Volcanic Rocks with Bacillus Pasteurella

作　　者：周颖 ZHOU Ying(Suizhong County Water Conservancy Construction Engineering Company,Suizhong 125200,China)

机构地区：[1]绥中县水利建筑工程公司,辽宁绥中125200

出　　处：《广东水利水电》2025年第3期96-102,共7页Guangdong Water Resources and Hydropower

摘　　要：该文以火山石为负载材料,主要探究了负载时间、负载方法、营养物质、负载比、温度、pH值对细菌活性的影响,通过比较直接浸泡法和离心浓缩法选择尿素分解浓度较高的优化方法;然后将火山石负载细菌后填入裂缝中,采用胶凝液和培养液修复裂缝,通过超声波、抗压强度测试评估修复后的裂缝密实度和强度恢复情况。结果表明,火山石负载巴氏芽孢杆菌可以有效提高混凝土抗压强度,且修复效果优于常规修复方法;在优化负载条件下,经过20 d的修复期,裂缝宽度为1.2 mm和1.8 mm的试件强度恢复率可以达到17.3%、14.5%,可为微生物修复水工混凝土裂缝提供一种新的有效途径。In this paper,the effects of loading time,loading method,nutrients,loading ratio,temperature and pH value on bacterial activity were mainly explored by using volcanic stone loading materials,and the optimization method with higher urea decomposition concentration was selected by comparing direct immersion method and centrifugal concentration method.Then,the volcanic stone was loaded with bacteria and filled into the cracks,and the cracks were repaired with gelling solution and culture medium,and the compactness and strength recovery of the repaired cracks were evaluated by ultrasonic and compressive strength tests.The results showed that Bacillus pasteurii could effectively improve the compressive strength of concrete,and the repair effect was better than that of conventional repair methods.Under the condition of optimized load,the strength recovery rate of specimens with crack widths of 1.2 and 1.8mm can reach 17.3%and 14.5%after 20 days of repair period,which can provide a new and effective way for microbial repair of hydraulic concrete cracks.

关 键 词：火山岩 巴氏芽孢杆菌 裂缝修复 碳酸钙沉积 

分 类 号：TU528[建筑科学—建筑技术科学]