不同因素影响下微生物修复混凝土裂隙效果研究

Study on the effect of microbial remediation of concrete cracks under different factors

为探究不同因素对微生物修复混凝土裂隙效果的影响,分析了不同裂隙宽度、裂隙角度及菌液pH对修复效果的影响。结果表明,混凝土裂隙试件在注入菌液一段时间后单轴抗压强度有明显提高,且pH=8的菌液修复效果要优于pH=7的菌液。裂隙宽度对修复效果的影响要大于裂隙角度,裂隙的修复效果与菌液注入的时间成正比,混凝土裂隙最佳的修复工况:裂隙角度90°、裂隙宽度0.5 mm、菌液pH=8。

To explore the influence of different factors on the effectiveness of microbial remediation of concrete cracks,the effects of different crack widths,crack angles,and bacterial solution pH on the remediation effect were analyzed.The results showed that the uniaxial compressive strength of concrete crack specimens was significantly improved after injecting bacterial solution for a period of time,and the repair effect of pH=8 bacterial solution was better than that of pH=7 bacterial solution.The influence of crack width on the repair effect is greater than that of crack angle.The repair effect of cracks is proportional to the time of bacterial solution injection.The optimal repair conditions for concrete cracks are crack angle of 90°,crack width of 0.5 mm,and bacterial solution pH=8.