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Cement grinding aid and preparation method thereof

A technology of cement grinding aids and high-efficiency water reducers, applied in the field of cement grinding aids, can solve the problems of restricting the popularization of industrialization and high production costs, and achieve the effects of reducing production costs, reducing dosage, and reducing production costs

Inactive Publication Date: 2015-12-30
徐福明 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the production cost of existing cement grinding aids of the same type is relatively high, and the cost per ton of finished products is about 4000-5000 yuan, which greatly restricts the popularization of industrialization

Method used

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  • Cement grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: Preparation of cement grinding aid.

[0019] First add 300kg triethanolamine in the reaction kettle, then add 500kg Glauber's salt, 300kg industrial salt, 100kg sodium nitrite, 100kg sodium thiosulfate, 200kg sodium acetate and 100kg sodium thiocyanate successively, stir 30min under 150rpm rotating speed, heat to 80°C and keep warm for 4h, then add 100kg triethanolamine, 100kg ethylene glycol, 50kg glycerol, 50kg polyethylene glycol 400, 100kg ASPF-Na and 100kg colloidal silicon dioxide in sequence, and continue to keep warm and stir for 30min, stop heating and Stir and discharge when the temperature drops to 40°C to obtain the required cement grinding aid.

Embodiment 2

[0020] Embodiment 2: Preparation of cement grinding aid.

[0021] First add 500kg triethanolamine in the reactor, then add 700kg Glauber's salt, 500kg industrial salt, 150kg sodium nitrite, 150kg sodium thiosulfate, 300kg sodium acetate and 150kg sodium thiocyanate successively, stir 40min under 140rpm rotating speed, heat to 70°C and keep warm for 5h, then add 100kg triethanolamine, 150kg ethylene glycol, 70kg glycerol, 70kg polyethylene glycol 400, 150kg ASPF-Na and 150kg colloidal silicon dioxide in sequence, and continue to keep warm and stir for 40min, stop heating and Stir and discharge when the temperature drops to 40°C to obtain the required cement grinding aid.

Embodiment 3

[0022] Embodiment 3: Preparation of cement grinding aid.

[0023] First add 400kg triethanolamine in the reactor, then add 600kg Glauber's salt, 400kg industrial salt, 125kg sodium nitrite, 125kg sodium thiosulfate, 250kg sodium acetate and 125kg sodium thiocyanate successively, stir 40min under 150rpm rotating speed, heat to 80°C and keep warm for 5h, then add 100kg triethanolamine, 125kg ethylene glycol, 60kg glycerol, 60kg polyethylene glycol 400, 125kg ASPF-Na and 125kg colloidal silicon dioxide in sequence, and continue to keep warm and stir for 30min, stop heating and Stir and discharge when the temperature drops to 40°C to obtain the required cement grinding aid.

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Abstract

The invention discloses a cement grinding aid and a preparation method thereof. The cement grinding aid concretely comprises, by weight, 3-7 parts of saltcake, 1-5 parts of industrial salt, 0.5-1.5 parts of sodium nitrite, 0.5-1.5 parts of sodium hyposulfite, 1-3 parts of sodium acetate, 0.5-1.5 parts of sodium sulfocyanate, 2-6 parts of triethanolamine, 0.5-1.5 parts of glycol, 0.3-0.7 parts of glycerol, 0.3-0.7 parts of polyethylene glycol, 0.5-1.5 parts of a high efficiency water reducer and 0.5-1.5 parts of a high efficiency reinforcing agent. The amounts of all materials in the cement grinding aid are controlled in order to effectively control the concentrations of chloride ions and alkalis in finished cement. Additionally, reduction of the amount of triethanolamine in the above formula greatly reduces the production cost of present cement grinding aids.

Description

technical field [0001] The invention belongs to the technical field of cement production, and relates to a low-chlorine, low-alkali and low-cost cement grinding aid and a preparation method thereof. Background technique [0002] In the grinding process of cement clinker, the addition of a small amount of cement grinding aid can not only significantly improve the grinding efficiency, but also improve the performance of cement. However, the simultaneous introduction of chloride ions and alkali in cement has brought disadvantages that cannot be ignored. Chloride ions can cause corrosion of steel bars in steel-concrete structures, and steel bar corrosion is an important factor affecting the durability of steel-concrete structures. Excessively high alkalinity will shorten the setting time of cement, increase water demand, and may even cause alkali-aggregate reaction with concrete aggregate, thereby destroying the concrete structure. [0003] In response to the above situation, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B103/52
Inventor 恽夕度徐福明武泉芳孙叶明胡斌李卫李卫鹏陈欢吕辉军尹志明
Owner 徐福明
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