Early-strength type aluminate cement based self-leveling material

A technology of aluminate cement and Portland cement, applied in the field of early-strength aluminate cement-based self-leveling materials, can solve the problems of false setting, shortened operation time, adulteration and the like

Inactive Publication Date: 2015-07-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the amount is too much, the working time will be shortened, and even false setting will occur. It is necessary to add an appropriate amount of retarder to control the setting time of the mortar.

Method used

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  • Early-strength type aluminate cement based self-leveling material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In terms of mass, the mix ratio is as follows: 340 parts of CA50 aluminate cement, 40 parts of α-hemihydrate gypsum, 20 parts of PⅡ52.5 Portland cement, 150 parts of 40-60 mesh quartz sand, 60-120 mesh quartz sand 230 parts, 400 mesh heavy calcium powder 220 parts, "Wake" 8 parts of 5044N redispersible latex powder, 2 parts of HY polycarboxylate powder superplasticizer, 1.5 parts of P803 powder defoamer, 0.25 parts of hydroxypropyl methylcellulose ether water retaining agent (viscosity of 80000mpa.s), and the mass ratio of water to material is 0.18. Mortar preparation and performance testing are carried out according to JC / T985-2005 "cement-based self-leveling mortar for ground" industry standard.

Embodiment 2

[0016] In terms of mass, the mix ratio is as follows: 340 parts of CA50 aluminate cement, 40 parts of β-hemihydrate gypsum, 20 parts of PⅡ52.5 Portland cement, 190 parts of 40-60 mesh quartz sand, 60-120 mesh quartz sand 190 parts, 400 mesh heavy calcium powder 220 parts, "Wake" 8 parts of 5044N redispersible latex powder, 2 parts of HY polycarboxylate powder superplasticizer, 1.5 parts of P803 powder defoamer, 0.25 parts of hydroxypropyl methylcellulose ether water retaining agent (viscosity of 80000mpa.s), and the mass ratio of water to material is 0.185. Mortar preparation and performance testing are carried out according to JC / T985-2005 "cement-based self-leveling mortar for ground" industry standard.

Embodiment 3

[0018] In terms of mass, the mix ratio is as follows: 320 parts of CA50 aluminate cement, 60 parts of α-hemihydrate gypsum, 20 parts of PⅡ52.5 Portland cement, 200 parts of 40-60 mesh quartz sand, 60-120 mesh quartz sand 200 parts, 400 mesh heavy calcium powder 200 parts, "Wake" 12 parts of 5044N redispersible latex powder, 2 parts of HY polycarboxylate powder superplasticizer, 1.5 parts of P803 powder defoamer, 0.2 parts of hydroxypropyl methylcellulose ether water retaining agent (viscosity of 80000mpa.s), and the mass ratio of water to material is 0.18. Mortar preparation and performance testing are carried out according to JC / T985-2005 "cement-based self-leveling mortar for ground" industry standard.

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Abstract

The invention relates to an early-strength type aluminate cement based self-leveling material which is characterized by comprising the following raw material components in parts by weight: 300-340 parts of aluminate cement, 40-60 parts of gypsum, 20-60 parts of portland cement, 380-420 parts of quartz sand, 180-220 parts of a heavy calcium carbonate powder, 8-20 parts of a redispersible emulsion powder, 2-2.4 parts of a water reducing agent, 0.15-0.25 part of a water-retaining agent, 1.5-2.5 parts of a defoaming agent, and 0-0.4 part of a retarder, wherein the water-material mass ratio is 0.18-0.19. The self-leveling material has the characteristics of good fluidity, high surface flatness, good stability, fast condensation hardening speed, high early strength, small volume shrinkage rate and the like, and can be used as a ground leveling material and a grouting repairing material.

Description

technical field [0001] The invention relates to an early-strength aluminate cement-based self-leveling material. Background technique [0002] Cement-based self-leveling materials are prepared with cement as the base material, adding aggregates, mineral fillers and chemical admixtures. When using, add water and stir according to the specified ratio or mix the powder and liquid materials evenly. After mechanical pumping or manual construction, there is no need for manual paving and vibration, and the high fluidity of the slurry will automatically level and form a flat plane. , can be used as flooring material or grouting repair material. [0003] The gelling system plays a decisive role in the performance of self-leveling materials. The strength of Portland cement develops slowly, and the volume deformation is large after hardening, which is prone to shrinkage and cracking. Aluminate cement has fast hardening speed, high early strength and strong sulfate resistance. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
Inventor 李东旭戴浩张树鹏琚诚兰
Owner NANJING UNIV OF TECH
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