A kind of repair mortar, its preparation method and construction method

Abstract

The invention provides a repair mortar, its preparation method and construction method. The repair mortar includes raw materials: Portland cement, expansion agent, polymer emulsion, viscosity modifier, water, powder water reducer, composite fiber , super absorbent resin and sand. The preparation method includes step S1, mixing wollastonite needle powder, potassium feldspar powder and polymer emulsion to obtain mixture A; step S2, mixing portland cement, magnesium oxide, viscosity modifier, powder The water reducer, the composite fiber, the superabsorbent resin and the sand are mixed uniformly to prepare a mixture B; in step S3, water is uniformly mixed with the mixtures A and B to prepare a repair mortar. The construction method includes step W1, pretreating the construction surface of the concrete matrix to be repaired; step W2, directly forming the repair mortar prepared in step S3 on the pretreated construction surface. The repair mortar described in the invention has better thixotropy.

Description

A kind of repair mortar, its preparation method and construction method technical field The present invention relates to concrete material technical field, be specifically related to a kind of repair mortar, its preparation method and construction method Law. Background technique Concrete structures are generally faced with serious durability problems, which greatly reduces the durability and service of concrete. life, but also directly promote the development of the concrete repair industry. Concrete repair works are mainly divided into structural repair works. There are two types of repairs and non-structural repairs. Among them, the concrete problem addressed by non-structural repairs is generally the occurrence of tortoises on the entire exposed surface. cracks, peeling, etc., or cracks and defects of non-main stress-bearing parts. For non-structural repairs, mainly using repair materials material to replace problematic parts of concrete structures. However...

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Problems solved by technology

The thixotropic cement-based materials obtained in the above patents have the problems of high cost, single function, and small application range

[0006] In summary, there is an urgent need for a repair mortar, its preparation method and construction method to solve the problems of high cost, single function and small application range of thixotropic cement-based materials in the prior art

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