Superfine fast-setting self-compacting repair mortar and preparation method thereof

Abstract

The invention relates to superfine quick-setting self-compacting repair mortar material and a preparation method thereof; the superfine quick-setting self-compacting repair mortar material is characterized by being prepared from, by total weight of the materials, 35.0-55.0% of quick-hardening early strength cement, 35.0-55.0% of fine aggregate, 3.0-10.0% of a mineral admixture, 2.5-5.0% of an excitant, 0.80-2.00% of redispersible latex powder, 0.25-0.50% of a water-reducing agent, 0.25-0.50% of a thickening time control agent, and 0.01-0.05% of a defoaming agent. The preparation method comprises: weighing the materials to a proportion, and mixing well in a mixing machine. The superfine quick-setting self-compacting repair mortar material has good constructability, is up to 330 mm in initial mobility, has initial setting time of < / =20 min and final setting time of < / =30 min, is up to 33.0 MPa and 50.0 MPa in 6 h compressive strength and 24 h compressive strength, has stably increasing late strength, is up to 4.0 MPa and 6.0 MPa in 1 d and 3 d interfacial flexural-tensile strength of concrete interface, has the advantages of micro-expansion effect and good construction operational simplicity, and is suitable for the quick repair of housing and roads, particularly for the repair of concrete fracture surfaces and damaged rail plates of high-speed railway ballastless tracks.

Description

technical field [0001] The invention belongs to the technical application field of building materials, and relates to an ultra-fine fast-setting self-compacting repair mortar and a preparation method thereof, specifically, to a kind of mortar suitable for building surface damage and wall cracks and high-speed railway ballastless track Quickly repair the gap and damage between the track plate and the buffer layer. When using it, just add water and stir evenly at the construction site. Background technique [0002] With the rapid development of the construction industry over the years, a large number of concrete construction projects have been built in our country. While bringing great convenience to people's lives, some difficult problems have also emerged. Due to the limitations of the manufacturing process level at that time, and with the passage of time, the buildings have been subjected to various environmental factors for a long time, resulting in surface damage, exposed...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the above-mentioned repair mortar setting time, interface bending and tensile strength and 6h compressive strength, the present invention provides an ultra-fine fast-setting self-compacting repair mortar. Another purpose of the present invention is to provide the above-mentioned ultra-fine fast-setting type Preparation method of self-compacting repair mortar