选取一种碳酸盐矿化菌,利用其新陈代谢过程中发生的酶化反应分解底物生成CO23–,通过适时引入Ca2+,最终在水泥石表面沉积一层致密而坚硬的碳酸钙保护层。研究了不同生长阶段的细菌和Ca2+浓度对所得碳酸钙层的物理、化学性能的影响,并通过测试毛细吸水系数表征试样表面覆膜后的抗渗效果。结果表明:细菌活性和Ca2+浓度对所沉积的碳酸钙的晶型和形貌均有很大程度的影响;经过菌液浸泡法表面覆膜的水泥石试样,其表面吸水系数大大降低,抗渗性能得到有效改善。 Select a carbonate mineralization bacteria, the use of its metabolism during the enzyme reaction to decompose the substrate to generate CO23-, by the timely introduction of Ca2 +, eventually deposited in the cement surface layer of dense and hard calcium carbonate protective layer. The effects of bacteria and Ca2 + concentration at different growth stages on the physical and chemical properties of the resulting calcium carbonate layer were studied. The anti-permeability effect of the coated surface was characterized by measuring the capillary water absorption coefficient. The results showed that the bacterial activity and Ca2 + concentration had a great influence on the morphology and morphology of the precipitated calcium carbonate. The surface water absorption coefficient of the cement coated with bacterium liquid immersion method greatly decreased, Permeability can be effectively improved.