A high-strength cement-based repair material for concrete prefabricated components

Abstract

The present invention relates to the field of repair materials for prefabricated components, in particular to a high-strength cement-based repair material for prefabricated concrete components, comprising the following components by weight: 20-40 parts of ordinary Portland cement, 40-40 parts of white Portland cement 60 parts, 20-40 parts of fly ash, 1-2 parts of concrete expansion agent, 10-20 parts of titanium dioxide, 50-100 parts of quartz sand, 1-3 parts of high-performance early-strength and early-setting admixture, 5-VAE emulsion 10 parts, 10‑20 parts of water, can achieve the same effect of color, texture, appearance and finished components, and greatly improve the flexural strength, compressive strength and durability.

Description

technical field [0001] The invention relates to the field of repair materials for prefabricated components, in particular to a high-strength cement-based repair material for prefabricated concrete components. Background technique [0002] In the prefabricated building industry, during the production and delivery of prefabricated components, due to production problems and hoisting and transportation problems, prefabricated components will suffer shallow damage and structural damage, such as: prefabricated components surface honeycomb pitting, missing edges and corners, etc. At present, component factories generally use the same grade of mortar for repairs. The repaired parts are prone to shrinkage and cracking, weak bonding, poor strength, serious color difference, etc., which seriously affect the quality of concrete precast components. [0003] Prefabricated building components or prefabricated components will be quickly cured under high temperature and high humidity. The hy...

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Problems solved by technology

[0002] In the prefabricated building industry, during the production and delivery of prefabricated components, due to production problems and hoisting and transportation problems, prefabricated components will suffer shallow damage and structural damage, such as: prefabricated components surface honeycomb pitting, missing edges and corners, etc. At present, component factories generally use the same grade of mortar for repairs. The repaired parts are prone to shrinkage and cracking, weak bonding, poor strength, serious color difference, etc., which seriously affect the quality of concrete prefabricated components.

[0003] Prefabricated building components or prefabricated components will be quickly cured under high temperature and high humidity. The hydration degree of the cementitious material has reached a very high level. Reaching this level of hydration will lead to serious color difference after repair. Even if ink and other pigments are used for color matching, the color and texture of the finished component cannot be achieved.

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