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A kind of sulfoaluminate cement-based self-compacting mortar and its application method

A sulfoaluminate cement and self-compacting technology, applied in the field of special building materials, can solve the problems of volume deformation, product quality is difficult to guarantee, effect gap, etc., and achieve the effect of low cost

Active Publication Date: 2022-04-08
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ordinary Portland cement grouting material is mostly used, the construction period is long, and the construction process is cumbersome. After setting and hardening, the strength is not high, the volume deformation is serious, the product quality is difficult to guarantee, and the gap between the expected construction effect and the construction effect is obvious.

Method used

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  • A kind of sulfoaluminate cement-based self-compacting mortar and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 109 parts of sulphoaluminate cement clinker, 712 parts of sand, 199 parts of stone powder, 45 parts of gypsum, 45 parts of lime, 1 part of coagulation regulator, 2 parts of water reducing agent, 0.2 part of thickener, and 0.2 part of air-entraining agent.

[0036] When the self-compacting mortar is applied to the project, all the raw material components of the self-compacting mortar are weighed and measured according to the proportion, and then all the weighed raw material components are put into the mixer for stirring and dry mixing, and the mixture is obtained. material, then add water to the mixture and stir evenly, ready to use. The amount of water added is 23.96% of the weight of the self-compacting mortar mixture used.

Embodiment 2

[0038] 109 parts of sulphoaluminate cement clinker, 712 parts of sand, 199 parts of stone powder, 45 parts of gypsum, 45 parts of lime, 1 part of coagulation regulator, 4 parts of water reducing agent, 0.2 part of thickener, and 0.2 part of air-entraining agent.

[0039]When the self-compacting mortar is applied to the project, all the raw material components of the self-compacting mortar are weighed and measured according to the proportion, and then all the weighed raw material components are put into the mixer for stirring and dry mixing, and the mixture is obtained. material, then add water to the mixture and stir evenly, ready to use. The amount of water added is 23.96% of the weight of the self-compacting mortar mixture used.

Embodiment 3

[0041] 109 parts of sulphoaluminate cement clinker, 712 parts of sand, 199 parts of stone powder, 45 parts of gypsum, 45 parts of lime, 1 part of coagulation regulator, 2 parts of water reducing agent, 0.2 part of thickener, and 0.2 part of air-entraining agent.

[0042] When the self-compacting mortar is applied to the project, all the raw material components of the self-compacting mortar are weighed and measured according to the proportion, and then all the weighed raw material components are put into the mixer for stirring and dry mixing, and the mixture is obtained. material, then add water to the mixture and stir evenly, ready to use. The amount of water added is 31.95% of the weight of the self-compacting mortar mixture used.

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Abstract

The invention provides a sulphoaluminate cement-based self-compacting mortar and its use method. The self-compacting mortar is composed of 100-150 parts of sulphoaluminate cement clinker, 670-750 parts of sand, and 180-180 parts of stone powder in parts by weight. 220 parts, 30-60 parts of gypsum, 30-60 parts of lime, 0.5-2 parts of coagulation regulator, 1-4 parts of water reducing agent, 0.1-0.4 parts of thickener, and 0.1-0.3 parts of air-entraining agent. Each component is dry mixed into a mixture and used by adding water; the amount of water added is 21.3-33.2% of the weight of the mixture. The initial fluidity of this self-compacting mortar is ≥360mm, and can be directly pumped to the working face for use without vibration; it can reach initial setting in 5-15 minutes and final setting in 20-30 minutes, and has high early strength. After 1 hour of construction The mortar can work normally; there is no shrinkage phenomenon, which can ensure that the mortar can be tightly and firmly bonded to the working surface.

Description

technical field [0001] The invention relates to the technical field of special building materials, in particular to a sulphoaluminate cement-based self-compacting mortar and a use method thereof. Background technique [0002] Self-compacting mortar is a cement-based material with high fluidity, self-compacting and no shrinkage. It has the characteristics of high fluidity, fast setting and hardening, self-compacting and high early strength. Self-compacting mortar is widely used in roadway temporary support, building repair, emergency repair and reinforcement, secondary grouting and other projects. [0003] With the increasing speed of economic construction, the demand for early-strength and fast-setting materials is increasing, and the performance requirements are getting higher and higher for projects such as waterproof and anti-seepage repair of high-rise buildings, road crack repair, and temporary support of mine roadways. At present, ordinary portland cement grouting mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06
Inventor 王雨利贺航熊祖强王成王春张耀辉
Owner HENAN POLYTECHNIC UNIV