Crack self-repairing concrete and preparation and repairing method thereof

Abstract

The invention discloses crack self-repairing concrete as well as a preparation method and a repairing method thereof. The crack self-repairing concrete is composed of cement, fly ash, water, sand, calcium lactate, a triterpenoid saponin air entraining agent, a 108 cfu/mL ATCC11859 bacillus pasteurii solution, PVA fibers and a water reducing agent according to the mass ratio of 927.4: 103: 309.1: 371: 31: 0.1: 16: 5: 2. When the crack self-repairing concrete disclosed by the invention generates cracks, calcium carbonate precipitates are generated to fill the cracks after microorganisms contactair and water, so that the self-repairing purpose is achieved, and the water seepage resistance of the concrete can be improved. By adding the triterpenoid saponin air entraining agent into the concrete, the working performance of the plastic concrete can be obviously improved, the durability of the hardened concrete can be improved, and meanwhile, the generated pores provide proper ecological niche for bacterial growth.

Description

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AI Technical Summary

Benefits of technology

This new compound helps create better quality cement products that are more durable than older methods like Portland Cement or Concrete Masonry Units (CMUs). It uses certain types of microbia called Bacillussallianicus instead of traditional chemicals such as potassium nitrate which were previously commonly found on building materials due to their environmental concerns. By utilizing this method, there will be no harmful substances produced during production while still producing effective amounts of calciorus carbonates from natural sources like coal ash. Additionally, these compositions have improved resistance against water damage compared to previous techniques. Overall, they provide technical benefits over existing ways of making stronger buildings.

Problems solved by technology

The technical issue addressed in this patents relating to improving concrete's ability to resist damage from external factors like weathering or environmental stressors caused by freezing rainwater during winter months can be attributed to lack of proper cure techniques due to weakened tensional properties and reduced autonomy overcomes these issues through enzyme systems called Baechleran cells.

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