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16.59%,吸水系数降低了 37.74%。氮吸附测试分析表面,微生物诱导的矿化产物有效填充了微孔,
              提高了水工混凝土的力学性能和抗渗性。
                  (3)根据混凝土裂缝自修复试验可知,掺驯化微生物混凝土试样的裂缝自愈合效果更佳,修复养
              护 56d时,裂缝最大修复宽度为 0.57mm,优于掺未驯化微生物混凝土试样的 0.44mm。同时,相较
              于未驯化微生物混凝土试样,驯化微生物混凝土试样在养护 28d后的渗透系数降低了 19.22%。
                  ( 4)试验表明,驯化后的巴氏芽孢杆菌在水工混凝土高碱内环境中具备更高的活性和诱导矿化沉
              积效率,据此证明微生物梯度驯化技术对提升巴氏芽孢杆菌耐碱性是有效可行的。


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