Concrete anti-crack self-repairing agent, preparation method thereof and anti-crack self-repairing concrete

Abstract

The invention relates to the technical field of concrete, in particular to a concrete anti-crack self-repairing agent, a preparation method thereof and anti-crack self-repairing concrete. The concrete anti-crack self-repairing agent comprises, by weight, 35-80 parts of bulking fillers, 0.1-1 part of magnesium aluminum silicate thixotropic agents, 0.1-2 part of polyvinyl alcohol fibers, 1-3 parts of nano-scale black carbon, 2-5 parts of glucose and 3-8 parts of casein. The particle diameter of the nano-scale black carbon is 20-80nm. The anti-crack self-repairing agent is added into the concrete, the inside of a crack touching water is softened, expanded, remodeled and solidified under the action of the self-repairing agent when the surface of the concrete is cracked, so that the crack of the concrete is plugged and self-repaired, and the compressive strength of the concrete is improved. The anti-crack self-repairing agent can be mixed and stirred along with raw materials the concrete in processing and stirring process of the concrete, normal processing of the concrete cannot be affected, and the self-repairing agent is high in practicability.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a concrete anti-crack self-repairing agent, a preparation method thereof, and a crack-resistant self-repairing concrete. Background technique [0002] Concrete is the largest and most widely used building material in the world today, but its brittle nature makes it poor in crack resistance, and it is easy to produce micro-cracks during construction or long-term use. The existence and expansion of these cracks will inevitably affect the quality of concrete. strength and durability. [0003] In order to reduce the impact of concrete cracking on its strength and durability, there have been many means of self-repairing concrete. According to the principle of repair, it can be divided into three types of repair methods based on physical, chemical, and biological principles. The repair method based on physical principles mainly uses shape memory alloys for self-repair; the repair met...

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Problems solved by technology

However, this method is greatly affected by the type of bacteria and the properties of the substrate, and different bacteria have different requirements for the living environment, such as acidity, alkalinity and aerobicity, so the application of this repair method is also limited.

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