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摘要:本发明提供了一种具有深层自修复功能的水泥基材料的制备方法。将产碳酸酐酶细菌的浓缩液和酵母菌粉(按质量比50~60:1)混合,固载到同一载体上;将底物和营养物质混合(按质量比30~40:1),固定在另一组载体上。然后以载体为轻骨料(载体质量占砂浆总质量的17~23%),添加水泥、沙子和水,均匀搅拌,成型试件。经过标准养护后,对试件制作裂缝,在25~30℃恒温水浴条件下,通入空气养护修复。试件的修复过程利用混凝土无损检测技术(超声波声时)进行监测,修复结果通过透水试验进行检测。结果表明:修复21d后,裂缝完全修复。与其他微生物法修复水泥基材料裂缝相比,极大地改善了裂缝的修复速度和修复深度。
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Abstract: The invention provides a preparation method of a cement-based material having a deep self-repairing function. The preparation method disclosed by the invention comprises the following steps of: mixing concentrated solution of carbonic anhydrase generating bacteria with saccharomycete powder according to the mass ratio of (50-60) to 1, and immobilizing on a same carrier; mixing a substrate with a nutritional substance according to the mass ratio of (30-40) to 1, and fixing on another carrier; adding cement, sand and water by taking the carriers as lightweight aggregates, wherein the mass of the carriers is 17-23% of the total mass of mortar; uniformly stirring, and forming a test piece; and manufacturing a crack of the test piece after standard curing, and introducing air to maintain and repair under 25-30 DEG C constant-temperature water bath conditions. The repairing process of the test piece is monitored by utilizing a concrete nondestructive detection technology (ultrasonic sound); the repairing result is detected through a water permeability test; the result shows that the crack is completely repaired after repairing for 21 d; in addition, compared with other microbiological methods for repairing cracks of the cement-based material, the crack repairing speed and repairing depth are greatly improved.
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申请人: 东南大学
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Applicant: UNIV SOUTHEAST
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地址: 210096 江苏省南京市四牌楼********(隐藏)
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发明(设计)人: 钱春香 陈怀成 任立夫 罗勉
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Inventor: QIAN CHUNXIANG; CHEN HUAICHENG; REN LIFU; LUO MIAN
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主分类号: C04B28/00(2006.01)I
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分类号: C04B28/00(2006.01)I C04B14/02(2006.01)I C04B14/04(2006.01)I
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