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OALib Journal期刊
ISSN: 2333-9721
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菌液浸泡法在水泥基材料表面覆膜研究
Abstract:
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。
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