Preparation method of magnesite cementing material retarders

A technology of gelling materials and retarders, which is applied in the field of magnesite gelling material modifiers, can solve problems such as insufficient operation, short initial setting time of slurry, and influence on product appearance

Inactive Publication Date: 2013-01-09
杨永
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the hydration reaction of magnesite cementitious material is an exothermic reaction, its heat of hydration is much higher than that of cement, which leads to a short initial setting time of the slurry, especially at high temperatures (25-40°C ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A kind of preparation method of magnesite gelling material retarder, the raw material that adopts is water, phosphoric acid, tartaric acid, sodium gluconate, and the mass fraction of each raw material is respectively:

[0014] water 50%

[0015] Tartaric acid 20%

[0016] Sodium Gluconate 10%

[0017] Phosphoric acid 20%

[0018] The above-mentioned raw materials are measured according to their mass percentages, then added into the reaction kettle, and stirred for 90 minutes under normal temperature conditions.

Embodiment 2

[0020] A kind of preparation method of magnesite gelling material retarder, the raw material that adopts is water, phosphoric acid, tartaric acid, sodium gluconate, and the mass fraction of each raw material is respectively:

[0021] water 60%

[0022] Tartaric acid 15%

[0023] Sodium Gluconate 7%

[0024] Phosphoric acid 18%

[0025] The above-mentioned raw materials are measured according to their mass percentages, then added into the reaction kettle, and stirred for 60 minutes under normal temperature conditions.

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PUM

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Abstract

The invention relates to magnesite cementing material modifiers, in particular to a preparation method of magnesite cementing material retarders. The magnesite cementing material retarders comprise, by mass, 50-60% of water, 15-20% of phosphoric acid, 10-20% of tartaric acid and 5-10% of sodium gluconate. The preparation method includes: adding the raw materials which are weighed by mass into a reaction kettle, and stirring for 60-90 minutes at the normal temperature prior to taking out for packaging. By the preparation method, initial setting time of magnesite cement can be effectively prolonged, operability of slurry is improved, and water-resistant and halogen-resistant performances of products can be improved. Besides, the preparation method can be widely applied to production of various magnesite products in a high-temperature production environment.

Description

technical field [0001] The invention relates to a modifier for a magnesite gelling material, in particular to a preparation method of a retarder for a magnesite gelling material. Background technique [0002] Magnesite cementitious material, also known as magnesite cement, is an air-hardening cementitious material, which has the characteristics of rapid hardening (no high-temperature steam curing), light weight and high strength, fire resistance and heat resistance, low temperature resistance, low corrosion, and good cementation. It is widely used in construction, municipal administration, machinery, agriculture and other fields. However, since the hydration reaction of magnesite cementitious material is an exothermic reaction, its heat of hydration is much higher than that of cement, which leads to a short initial setting time of the slurry, especially at high temperatures (25-40°C ) In the production environment, problems such as insufficient operation and waste of materi...

Claims

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Application Information

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IPC IPC(8): C04B24/06
Inventor 杨永
Owner 杨永
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