Cement-based self-leveling mortar

A self-leveling mortar and cement mortar technology, applied in the field of concrete additives, can solve the problems of unacceptable user, low early strength, surface sanding, etc., achieve good fluidity and leveling performance, speed up construction progress, and smooth the surface.

Inactive Publication Date: 2012-05-02
CHENGDU JIAXIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, it is because this material is not suitable for the national conditions at present.
Second, the current domestic economy and construction technology are relatively backward, and the cost of large-area use in construction projects is relatively high, which is difficult for users to accept
[0003] (1) The early strength is low. Since the cement-based self-leveling mortar generally uses ordinary Portland cement as the main cementing material, ultra-fine sand and high water-cement ratio are used, the early strength of the mortar is seriously insufficient, which directly affects the construction process. and the time

Method used

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  • Cement-based self-leveling mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] formula:

[0027] 350kg of ordinary Portland cement with a standard mortar strength grade of 42.5; 100kg of fast-hardening sulfoaluminate cement with a standard mortar strength grade of 42.5; heavy calcium 15kg; redispersible latex powder 4.5kg; polycarboxylate superplasticizer NT-200 (produced by Suzhou Fuke New Building Materials Co., Ltd.) 1.5kg; triethanolamine 1.5kg; tartaric acid 1.5kg; hydroxypropyl methylcellulose ether 1.5kg; fine river sand with a fineness modulus of 1.4 524.5kg.

[0028] During construction, add water to the above product and stir evenly to form a slurry that can be used (the weight ratio of water to dry powder mortar of this product is 0.16-0.20:1).

Embodiment 2

[0030] formula:

[0031] 380kg of ordinary Portland cement with a standard mortar strength grade of 42.5; 120kg of fast-hardening sulfoaluminate cement with a standard mortar strength grade of 42.5; heavy calcium 16kg; redispersible latex powder 7kg; polycarboxylate superplasticizer NT -201 (produced by Suzhou Fuke New Building Materials Co., Ltd.) 2kg; triethanolamine 2kg; tartaric acid 2kg; hydroxypropyl methylcellulose ether 2kg; fine river sand with a fineness modulus of 1.4 469kg.

[0032] During construction, the above product can be used by adding water and stirring it into a slurry (the weight ratio of water to dry powder mortar of this product is 0.16-0.21:1).

Embodiment 3

[0034] formula:

[0035] 400kg of ordinary Portland cement with a standard mortar strength grade of 42.5; 150kg of fast-hardening sulfoaluminate cement with a standard mortar strength grade of 42.5; heavy calcium 18kg; redispersible latex powder 1kg; polycarboxylate superplasticizer NT -300 (produced by Suzhou Fuke New Building Materials Co., Ltd.) 3kg; triethanolamine 3kg; tartaric acid 3kg; hydroxypropyl methylcellulose ether 3kg; fine river sand with a fineness modulus of 1.4 419kg.

[0036] During construction, add water to the above product and stir it into a slurry (the weight ratio of water to dry powder mortar of this product is 0.16-0.21:1).

[0037] The method of use of the present invention:

[0038] The construction technology of cement self-leveling mortar has a crucial influence on the quality of the mortar. The specific construction technology is as follows:

[0039] 1. Requirements for the basic ground

[0040] The basic cement floor is required to be clean,...

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PUM

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Abstract

The invention relates to cement-based self-leveling mortar, which is prepared from the following raw materials in percentage by weight: 35 to 40 percent of No.425 ordinary portland cement, 10 to 15 percent of No.42.5 rapid hardening sulphoaluminate cement, 15 to 18 percent of heavy calcium carbonate, 0.45 to 1 percent of high polymer, 0.15 to 0.3 percent of water reducing agent, 0.15 to 0.3 percent of early strength agent, 0.15 to 0.3 percent of retarder, 0.15 to 0.3 percent of thickener and the balance of fine river sand with the fineness modulus of 1.2 to 1.5. Compared with other traditional cement self-leveling mortar, the self-leveling mortar has the characteristics of higher fluidity, higher leveling property, high early strength and the like.

Description

technical field [0001] The invention relates to the field of concrete additives, in particular to a cement-based self-leveling mortar. Background technique [0002] Cement-based self-leveling mortar has good fluidity and stability, high early strength, fast construction speed, and low labor intensity. It is an ideal material for ground paving of large supermarkets, parking lots and warehouses, and is also an ideal material for ground construction of modern buildings. The development direction has great market potential. Compared with developed countries, the research on cement-based self-leveling mortar in my country started relatively late, around the late 1980s and early 1990s, and the initial development speed and popularization were also slow. On the one hand, it is because this material is not very suitable for the national conditions at present. The second is that the current domestic economy and construction technology are relatively backward, and the cost of large-...

Claims

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Application Information

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IPC IPC(8): C04B28/06
Inventor 钱炳黄泰东杨杨
Owner CHENGDU JIAXIN TECH
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