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Cement-based self-leveling mortar

A self-leveling mortar and cement-based technology, applied in the field of self-leveling mortar, can solve the problems of increased segregation and settlement, accelerated surface, and easy cracking of the surface, and achieves the effect of significantly reducing the cost and reducing the cost of raw materials.

Inactive Publication Date: 2017-05-17
北京宝辰联合科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, when ordinary cement-based self-leveling mortar is used as a leveling layer, there are at least the following problems: (1) When the construction thickness of self-leveling mortar is high, the degree of segregation and settlement will increase, that is, coarse aggregate It sinks and the mortar floats up, resulting in loose surface structure, prone to dusting, sanding and cracking; (2) thick self-leveling mortar is easy to form a moisture gradient in the thickness direction, that is, the surface moisture is lower than the interior, thus forming stress Accelerate surface cracking; (3) The amount of cementitious material used in ordinary self-leveling mortar is high, the aggregate is fine, and when the laying thickness is high, the surface is more prone to cracking

Method used

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  • Cement-based self-leveling mortar

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In terms of mass fraction, the component ratio is as follows: 160 parts of PⅡ52.5 Portland cement, 55 parts of CA50 aluminate cement, 35 parts of anhydrous gypsum, 15 parts of bentonite, 125 parts of heavy calcium powder, 20-40 mesh water washing river 200 parts of sand, 200 parts of washed river sand of 40-70 mesh, 200 parts of washed river sand of 70-140 mesh, 5 parts of redispersible latex powder, 0.5 part of water reducer, 0.6 part of retarder, 0.8 part of cellulose ether, 0.8 parts of defoaming agent, 0.3 parts of lithium carbonate, 0.3 parts of polypropylene fiber, and a water-material mass ratio of 0.22 to prepare cement-based self-leveling mortar.

Embodiment 2

[0042] In terms of mass fraction, the ratio of raw materials is as follows: 170 parts of PO42.5 Portland cement, 45 parts of CA50 aluminate cement, 35 parts of anhydrous gypsum, 20 parts of bentonite, 70 parts of heavy calcium powder, 20-40 mesh washing 150 parts of river sand, 250 parts of washed river sand of 40-70 mesh, 250 parts of washed river sand of 70-140 mesh, 5 parts of redispersible latex powder, 0.6 part of water reducer, 0.5 part of retarder, 1 part of cellulose ether , 1.2 parts of defoaming agent, 0.5 part of lithium carbonate, 0.4 part of polypropylene fiber, and the mass ratio of water to material is 0.21 to prepare cement-based self-leveling mortar.

Embodiment 3

[0044] In terms of mass fraction, the raw material components are as follows: 165 parts of PO42.5 Portland cement, 45 parts of 52.5 sulfoaluminate cement, 40 parts of anhydrite, 15 parts of bentonite, 120 parts of heavy calcium powder, 20-40 mesh 150 parts of washed river sand, 250 parts of washed river sand of 40-70 mesh, 200 parts of washed river sand of 70-140 mesh, 10 parts of redispersible latex powder, 0.4 part of water reducing agent, 0.5 part of retarder, 0.7 part of cellulose ether 1 part, 1 part of defoamer, 0.5 part of lithium carbonate, 0.3 part of polypropylene fiber, and the mass ratio of water to material is 0.21 to prepare cement-based self-leveling mortar.

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Abstract

The invention discloses cement-based self-leveling mortar, which comprises the following components, by mass part, 160-180 parts of Portland cement, 40-55 parts of aluminate cement or sulphoaluminate cement, 30-40 parts of anhydrite, 15-25 parts of bentonite, 60-125 parts of heavy calcium carbonate powder, 600-650 parts of washed fluvial sand, 5-10 parts of redispersible emulsion powder, 0.4-0.6 part of a water reducer, 0.5-0.7 part of a retarder, 0.5-1.0 part of cellulose ether, 0.8-1.2 parts of an antifoaming agent and 0.3-0.5 part of an early strength agent. The cement-based self-leveling mortar is excellent in separation resistance, is low in cost, and is particularly suitable for a self-leveling layer with a relatively large thickness.

Description

technical field [0001] The invention belongs to the field of self-leveling mortar, in particular to a cement-based self-leveling mortar. Background technique [0002] Self-leveling mortar has excellent workability, can save labor, improve construction efficiency, and is widely used in architectural decoration projects. In the construction of floor materials, a leveling layer is usually laid on the base layer first, and then surface materials such as floor tiles, floors, and carpets are laid on top. [0003] When the ground base is relatively rough or there are pipes on it, the thickness of the self-leveling leveling layer must be high enough to pave the ground, and the local construction thickness can sometimes reach 5cm. In this case, when ordinary cement-based self-leveling mortar is used as a leveling layer, there are at least the following problems: (1) When the construction thickness of self-leveling mortar is high, the degree of segregation and settlement will increas...

Claims

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Application Information

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IPC IPC(8): C04B28/16C04B111/62
CPCC04B28/16C04B2111/62C04B2201/50C04B7/02C04B7/32C04B14/104C04B14/28C04B14/068C04B24/383C04B22/10C04B16/0633C04B24/2623C04B2103/302C04B2103/22C04B2103/50
Inventor 戴浩
Owner 北京宝辰联合科技股份有限公司
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