Anti-cracking self-healing agent for concrete and preparation method thereof and anti-cracking self-healing concrete

Abstract

The invention relates to the technical field of concrete, in particular to a concrete anti-cracking self-repairing agent and a preparation method thereof, and anti-cracking self-repairing concrete, and the concrete anti-cracking self-repairing agent, which comprises the following components by weight: 35-80 parts of expansion filler, 0.1-1 part of magnesium aluminum silicate thixotropic agent, 0.1-2 part of polyvinyl alcohol fiber, 1-3 parts of nanoscale carbon black, 2-5 parts of glucose and 3-8 parts of casein; The particle size is 20-80nm; by adding anti-cracking self-healing agent to concrete, when cracks appear on the concrete surface, the action of the self-healing agent will soften, expand and reshape and solidify the cracks when exposed to water, thereby sealing the cracks. The anti-crack self-healing agent of the present invention can be mixed and stirred together with the raw materials of the concrete when the concrete is processed and stirred, and the normal processing operation of the concrete is not affected. , strong 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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