Prepn. of retardant for magnesite binding material

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 cement, also known as magnesite cement, is a kind of air-hardening cement. 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 to ensure ...

Examples

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.

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 cement, also known as magnesite cement, is a kind of air-hardening cement. 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 to ensure ...

Examples

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.