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Cement modifier

A conditioner and cement technology, applied in the field of cement conditioners, can solve the problems of high cost and incomplete functions of cement conditioners, and achieve the effects of reducing shrinkage cracks due to temperature differences, improving frost resistance, and reducing shrinkage

Active Publication Date: 2013-08-07
蓝烟(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to provide a low-cost, excellent performance and comprehensive functions to solve the problems of high cost and incomplete functions of the existing cement conditioners mentioned above. cement conditioner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Based on 100kg product, it contains 1kg of cellulose ether, 6kg of fiber, 12kg of cross-linked polyacrylate, 8kg of montmorillonite, 12kg of ethoxylated sodium alkyl sulfide, and the rest is kaolin. The mortar formula is as follows: by mass: water: cement: sand: cement regulator = 0.48:1:3:0.01. Using the regulator of this formula, the delamination degree of the mortar can be reduced to less than 18mm, and the water retention rate is 80%, which improves the performance of the mortar. Frost resistance, reduce the shrinkage rate of mortar, 30d compressive strength 13MPa, 30d bond strength 0.4MPa, frost resistance: 30d mass loss 3%, strength loss 18%, 30d shrinkage rate 0.4%; setting time 5 hours; and The use of the preferred formula of the present invention greatly improves the performance of the mortar.

Embodiment 2

[0023] Based on 100kg product, it contains 1.2kg of cellulose ether, 8.8kg of fiber, 10kg of cross-linked polyacrylate, 10kg of montmorillonite, 10kg of ethoxylated sodium alkyl sulfide, 10kg of starch grafted acrylonitrile, and dibutyl tin dilaurate The remaining 10kg is kaolin. The mortar formula is as follows: by mass: water: cement: sand: cement conditioner = 0.45:1:3:0.01. Using the regulator of this formula, the delamination degree of the mortar can be reduced to 15mm, the water retention rate is above 85%, the frost resistance of the mortar is improved, and the shrinkage rate of the mortar is reduced. The 30d compressive strength is 15MPa, the 30d bond strength is 0.5MPa, and the freeze resistance Properties: 30d mass loss 2%, strength loss 15%, 30d shrinkage rate 0.3%; setting time 4 hours; and the use of the preferred formula of the present invention greatly improves the performance of the mortar.

Embodiment 3-11

[0025] The mortar formula is as follows: by mass: water: cement: sand: cement conditioner = 0.5:1:3:0.01.

[0026] The formula of each example is as follows, and the measured data is as follows.

[0027]

[0028]

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Abstract

The invention relates to the field of building materials, in particular to a cement modifier, solving the problem that the existing cement modifiers have high cost and incomplete functions. The cement modifier has low cost, excellent performances and complete functions and comprises the following substances by mass percentage: 0.5-2% of cellulose ether, 5-10% of fibers, 5-15% of crosslinked polyacrylate, 5-15% of montmorillonite and the balance of kaolin. The modifier has the beneficial effects of improving the frost resistance, increasing the strength and reducing the shrinkage and is suitable for popularization and application.

Description

Technical field [0001] The invention relates to the field of building materials and is a cement regulator. Background technique [0002] Due to the generally low design strength grade of building mortar, the amount of cement used in the manufacture is relatively small. Most of the material is yellow sand. Although the strength of the mortar can meet the requirements, its workability, water retention and workability are quite poor. Later, it is easy to crack, even bulge and peel off, which seriously affects the construction quality. In order to improve the workability of construction mortar, for a long time, the method of adding lime paste has been commonly used in construction projects, although the workability of the mortar has been improved to a certain extent. It has an adverse effect on the water resistance of the mortar and does not improve the crack resistance of the mortar. Although the use of microfoaming agent can also improve the workability of the mortar and reduce del...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38
Inventor 林二军
Owner 蓝烟(北京)科技有限公司
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