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Waste-residue and magnesium-phosphate cement self-leveling mortar

A technology of magnesium phosphate cement and self-leveling mortar, applied in the field of construction, can solve the problems of loss of fluidity, high price, fast hydration and coagulation, etc., to achieve good wear resistance and acid and alkali corrosion resistance, increase the cost of use, production Processing simple effects

Inactive Publication Date: 2016-04-20
CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP XIAMEN HONGYE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cementitious materials of domestic cement-based self-leveling floor materials generally use ordinary Portland cement or sulphoaluminate cement and ordinary Portland cement. Due to the heterogeneity and shrinkage characteristics of Portland cement, There are the following problems: 1. The early strength is low, and the 24-hour compressive strength is 6-10MPa; 2. The surface is easy to powder and crack, and the product performance stability is not good; 3. The amount of admixture is high, and the polymer material and The thermal expansion coefficient and elastic modulus of the base layer are significantly different. When the temperature changes, the contraction and expansion will not match, resulting in cracking, and even attenuation of mechanical properties and durability. Therefore, it can only be used indoors and places where the temperature difference between day and night is small.
The main reason why magnesium phosphate cement is not widely used is that the hydration and coagulation is too fast and the construction is difficult; , leading to cost reduction

Method used

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  • Waste-residue and magnesium-phosphate cement self-leveling mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Preparation of waste residue magnesium phosphate cement self-leveling mortar

[0030] Unit: parts by mass.

[0031] (1) Magnesium phosphate cement 33, including magnesium oxide 18.7, potassium dihydrogen phosphate 14.3;

[0032] (2) ceramic waste slag 30;

[0033] (3) fine aggregate 34;

[0034] (4) Boric acid retarder 0.7, special retarder water reducer 2.3;

[0035] Preparation method and preparation before use:

[0036] First mix the above (1)-(3) with boric acid retarder evenly, and then add special retarder water reducer before use.

[0037] Specifically, pour water into the mixing tank, then add the special retarding water reducer (liquid) into the water, then pour the mixture of the above (1)-(3) and boric acid retarder into the bucket, and use planetary The mortar mixer can be stirred for 1.5-2 minutes, and the water consumption is 0.18-0.20:1 of the weight of waste residue magnesium phosphate cement self-leveling mortar.

Embodiment 2

[0038] Example 2: Preparation of waste residue magnesium phosphate cement self-leveling mortar

[0039] Unit: parts by mass.

[0040] (1) Magnesium phosphate cement 38, including magnesium oxide 21.8, potassium dihydrogen phosphate 16.2

[0041] (2) Ceramic waste 27

[0042] (3) Fine aggregate 31

[0043] (4) Boric acid retarder 0.8, special retarder water reducer 3.2

[0044] The preparation method and the preparation before use are the same as in Example 1.

Embodiment 3

[0045] Example 3: Preparation of waste residue magnesium phosphate cement self-leveling mortar

[0046] Unit: parts by mass.

[0047] (1) Magnesium phosphate cement 35, of which magnesium oxide 17.6, potassium dihydrogen phosphate 13.4

[0048] (2) Ceramic waste 28

[0049] (3) Fine aggregate 33.4

[0050] (4) Boric acid retarder 0.5, special retarder water reducer 3.1

[0051] The preparation method and the preparation before use are the same as in Example 1.

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Abstract

The invention discloses waste-residue and magnesium-phosphate cement self-leveling mortar. The waste-residue and magnesium-phosphate cement self-leveling mortar comprises, by mass, 33%-38% of magnesium phosphate cement, 25%-31% of ceramic waste residues, 30%-35% of fine aggregate, 0.5%-0.8% of retarder and 2%-4% of special retarding water reducer. By means of the waste-residue and magnesium-phosphate cement self-leveling mortar, water does not need to be added for maintenance after construction is completed, early strength is high, the anti-cracking performance is excellent, and good abrasive resistance and good acid-alkali corrosion resistance are achieved.

Description

technical field [0001] The invention relates to the construction field, in particular to a waste residue magnesium phosphate cement self-leveling mortar. Background technique [0002] Cement-based self-leveling floor material is a new type of floor material that can flow and level itself by itself, which is composed of cement as the cementitious material, mixed with fine aggregate and admixture, and is mainly used for ground leveling or finishing. At present, the cementitious materials of domestic cement-based self-leveling floor materials generally use ordinary Portland cement or sulphoaluminate cement and ordinary Portland cement. Due to the heterogeneity and shrinkage characteristics of Portland cement, There are the following problems: 1. The early strength is low, and the 24-hour compressive strength is 6-10MPa; 2. The surface is easy to powder and crack, and the product performance stability is not good; 3. The amount of admixture is high, and the polymer material and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34C04B14/06C04B18/16C04B22/00C04B24/02C04B24/08C04B24/16C04B103/22C04B103/30C04B111/62
CPCC04B28/34C04B2103/22C04B2103/302C04B2111/62C04B18/165C04B14/068C04B22/0013C04B24/08C04B24/161C04B24/02Y02W30/91
Inventor 彭鹏飞吴玉生陈镇杉秦宪明高言立杨晓慧黄舟
Owner CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP XIAMEN HONGYE
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