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Prepn of retardant for magnesite binding material

A technology of cementitious material and retarder, applied in the field of magnesite cementitious material modifier, can solve the problems of short initial setting time of slurry, poor water resistance of products, and difficulty in ensuring the appearance quality of products.

Inactive Publication Date: 2002-02-27
SHANDONG PROVINCIAL ACAD OF BUILDING RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, due to the short initial setting time of the slurry of this material and the poor water resistance of the product, it is not conducive to the molding operation of the slurry in the process of manufacturing the finished product, and it is difficult to ensure the appearance quality of the product. This is the existing magnesite cementitious material. insurmountable flaws

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The percentage by weight that each raw material accounts for in the total weight is:

[0013] 30% water, 25% aluminum hydroxide, 15% tartaric acid, 30% phosphoric acid.

[0014] Add the above raw materials into the reaction kettle and stir for 45 minutes at normal temperature.

Embodiment 2

[0016] The percentage by weight that each raw material accounts for in the total weight is:

[0017] Water 25%, aluminum hydroxide 30%, tartaric acid 20%, phosphoric acid 25%.

[0018] Add the above raw materials into the reaction kettle and stir for 30 minutes at normal temperature.

Embodiment 3

[0020] The percentage by weight that each raw material accounts for in the total weight is:

[0021] Water 35%, aluminum hydroxide 20%, tartaric acid 10%, phosphoric acid 35%.

[0022] Add the above raw materials into the reaction kettle and stir for 60 minutes at normal temperature.

[0023] Among the above-mentioned embodiments, embodiment 2 is the best embodiment.

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Abstract

The retarding agent of magnesite cementing material is made up by using (wt%) water 25-35%, aluminium hydroxide 20-30%, tartaric acid 10-20% and phosphoric acid 25-35%. It can effectively delay initial setting time of slurry material, and can raise water-proof property of product.

Description

technical field [0001] The invention relates to a magnesite gelling material modifier, in particular to a preparation method of a magnesite gelling material retarder. Background technique [0002] Magnesite cementitious material, also known as magnesite cement, is an air-hardening cementitious material. When using this material to manufacture products, it has the characteristics of no need for moisture curing, fast strength growth, high flexural and compressive strength, weak alkali Non-toxic, low corrosion, high elasticity, good toughness, light weight, good cementation to organic and inorganic materials or fibers, etc., widely used in construction, decoration, urban construction, agriculture and other fields. Even so, due to the short initial setting time of the slurry of this material and the poor water resistance of the product, it is not conducive to the molding operation of the slurry in the process of manufacturing the finished product, and it is difficult ...

Claims

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Application Information

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IPC IPC(8): C04B22/16C04B24/04C04B28/30
Inventor 曹永敏王自福王守宪王翔殷晓梅宋建华张春山
Owner SHANDONG PROVINCIAL ACAD OF BUILDING RES
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