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A platform for research: civil engineering, architecture and urbanism
Preparation method of cheap and efficient microbial crack self-repairing concrete
The invention discloses cheap and efficient microbial self-repairing concrete and a preparation method thereof. The cheap and efficient microbial self-repairing concrete comprises the following components: self-repairing particles loaded with a microbial repairing agent, cement, stones, sand, silica fume, water and a polycarboxylate superplasticizer. According to the crack self-repairing concrete,aerobic basophilic mixed bacteria with mineralization deposition characteristics are used as a self-repairing agent, whey and calcium acetate are used as nutrient substances for metabolism of the mixed bacteria, and light porous materials such as expanded perlite, fly ash pottery sand and the like which are low in price are used as microbial carriers. Reasonable immobilization of microorganisms and nutrient substances is realized by adopting a two-layer film wrapping method. Concrete cracks are efficiently self-repaired through calcium carbonate precipitates generated in the metabolism process of the microorganism self-repairing agent, the crack self-repairing capacity of concrete in the service period is improved, and therefore the durability of the concrete is improved, the crack efficiency can be improved by 40%, and the service life of the concrete is prolonged. Moreover, the microbial culture cost and the nutrient substance cost can be respectively reduced by 60% and 50%.
本发明公开了一种廉价高效的微生物自修复混凝土及其制备方法，其组分为载有微生物修复剂的自修复颗粒、水泥、石子、砂、硅灰、水、聚羧酸高效减水剂。该裂缝自修复混凝土以具有矿化沉积特性的好氧嗜碱混菌作为自修复剂，以乳清和乙酸钙为混菌新陈代谢的营养物质，微生物载体采用价格低廉的膨胀珍珠岩、粉煤灰陶砂等轻质多孔材料，并采用两层膜包裹法来实现微生物和营养物质的合理固载。通过微生物自修复剂在新陈代谢过程中产生的碳酸钙沉淀对混凝土裂缝进行高效自修复，提高混凝土在服役期间的裂缝自修复能力，从而改善混凝土的耐久性能，不仅能够使裂缝效率提高40％，而且能够使微生物培养费用和营养物质费用分别降低60％和50%。
Preparation method of cheap and efficient microbial crack self-repairing concrete
The invention discloses cheap and efficient microbial self-repairing concrete and a preparation method thereof. The cheap and efficient microbial self-repairing concrete comprises the following components: self-repairing particles loaded with a microbial repairing agent, cement, stones, sand, silica fume, water and a polycarboxylate superplasticizer. According to the crack self-repairing concrete,aerobic basophilic mixed bacteria with mineralization deposition characteristics are used as a self-repairing agent, whey and calcium acetate are used as nutrient substances for metabolism of the mixed bacteria, and light porous materials such as expanded perlite, fly ash pottery sand and the like which are low in price are used as microbial carriers. Reasonable immobilization of microorganisms and nutrient substances is realized by adopting a two-layer film wrapping method. Concrete cracks are efficiently self-repaired through calcium carbonate precipitates generated in the metabolism process of the microorganism self-repairing agent, the crack self-repairing capacity of concrete in the service period is improved, and therefore the durability of the concrete is improved, the crack efficiency can be improved by 40%, and the service life of the concrete is prolonged. Moreover, the microbial culture cost and the nutrient substance cost can be respectively reduced by 60% and 50%.
本发明公开了一种廉价高效的微生物自修复混凝土及其制备方法，其组分为载有微生物修复剂的自修复颗粒、水泥、石子、砂、硅灰、水、聚羧酸高效减水剂。该裂缝自修复混凝土以具有矿化沉积特性的好氧嗜碱混菌作为自修复剂，以乳清和乙酸钙为混菌新陈代谢的营养物质，微生物载体采用价格低廉的膨胀珍珠岩、粉煤灰陶砂等轻质多孔材料，并采用两层膜包裹法来实现微生物和营养物质的合理固载。通过微生物自修复剂在新陈代谢过程中产生的碳酸钙沉淀对混凝土裂缝进行高效自修复，提高混凝土在服役期间的裂缝自修复能力，从而改善混凝土的耐久性能，不仅能够使裂缝效率提高40％，而且能够使微生物培养费用和营养物质费用分别降低60％和50%。
Preparation method of cheap and efficient microbial crack self-repairing concrete
一种廉价高效的微生物裂缝自修复混凝土制备方法
ZHANG JIAGUANG (author) / FAN YUEDONG (author) / ZHOU AIJUAN (author) / LIU YUANZHEN (author)
2021-02-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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