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a cement grinding aid

A technology of cement grinding aids and catalysts, applied in the field of cement grinding aids, can solve problems such as poor adaptability, achieve good grinding aid effect, good reinforcement effect, and increase strength

Active Publication Date: 2021-07-23
SHANDONG HONGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the unique molecular structure of alcohol amines such as triethanolamine and triisopropanolamine has good adsorption, dispersion and induction of early hydration, which can improve cement grinding efficiency and early strength, but in the face of many varieties of cement and The adaptability of various types of industrial solid waste as mixed materials is poor

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A cement grinding aid is composed of the following raw materials in parts by weight: 40 parts of nitrilotriacetic acid and ethylene glycol reactant, 20 parts of isooctanyl phosphate, 15 parts of alcohol amine compound, and 8 parts of surfactant; The reactant of nitrilotriacetic acid and ethylene glycol is prepared by the following method: adding ethylene glycol in molar ratio: nitrilotriacetic acid=0.8:1 into the reactor, and then adding 2% of the total mass of nitrilotriacetic acid and ethylene glycol Catalyst, stirred, heated up to 120°C for 4 hours of constant temperature reaction, and lowered to room temperature to obtain the reactant of nitrilotriacetic acid and ethylene glycol.

[0021] The catalyst is sulfamic acid.

[0022] The isooctyl phosphate is isooctyl phosphate monoester.

[0023] The alcohol amine compound is diethanol monoisopropanolamine.

[0024] The surfactant is polyoxyethylene octylphenol ether.

Embodiment 2

[0026] A cement grinding aid, which is composed of the following raw materials in parts by weight: 55 parts of nitrilotriacetic acid and ethylene glycol reactant, 15 parts of isooctyl phosphate, 20 parts of alcohol amine compound, and 3 parts of surfactant; The reactant of nitrilotriacetic acid and ethylene glycol is prepared by the following method: adding ethylene glycol in molar ratio: nitrilotriacetic acid=1.5:1 into the reactor, and then adding 0.5% of the total mass of nitrilotriacetic acid and ethylene glycol Catalyst, stirred, heated up to 150°C for 3 hours at a constant temperature, and cooled down to room temperature to obtain the reactant of nitrilotriacetic acid and ethylene glycol.

[0027] The catalyst is concentrated sulfuric acid.

[0028] The isooctyl phosphate is isooctyl phosphate diester.

[0029] The alcohol amine compound is monoethanol diisopropanolamine.

[0030] The surfactant is polyvinylpyrrolidone.

Embodiment 3

[0032] A cement grinding aid, which is composed of the following raw materials in parts by weight: 50 parts of nitrilotriacetic acid and ethylene glycol reactant, 18 parts of isooctyl phosphate, 17 parts of alcohol amine compound, and 5 parts of surfactant; The reaction product of nitrilotriacetic acid and ethylene glycol is prepared by the following method: adding ethylene glycol in molar ratio: nitrilotriacetic acid = 1:1 into the reactor, and then adding 1% of the total mass of nitrilotriacetic acid and ethylene glycol Catalyst, stirred, heated up to 130°C for 3.5 hours at a constant temperature, and cooled down to room temperature to obtain the reactant of nitrilotriacetic acid and ethylene glycol.

[0033] The catalyst is boric acid.

[0034] The isooctyl phosphate is formed by mixing isooctyl phosphate diester and isooctyl phosphate monoester according to a molar ratio of 2.5:1.

[0035] The alcohol amine compound is monoethanol diisopropanolamine.

[0036] The surfact...

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Abstract

The invention discloses a cement grinding aid, which belongs to the technical field of cement process admixtures. The grinding aid of the present invention is composed of the following raw materials in parts by weight: 40-55 parts of nitrilotriacetic acid and ethylene glycol reactant, 15-20 parts of isooctyl phosphate, 15-20 parts of alcohol amine compound, 3 parts of surfactant ‑8 parts; the reactant of nitrilotriacetic acid and ethylene glycol is prepared by the following method: add nitrilotriacetic acid and A catalyst with 0.5-2% of the total mass of ethylene glycol is obtained by stirring, raising the temperature to 120-150° C. for constant temperature reaction for 3-4 hours, and cooling down to room temperature. At 0.01%-0.015% dosage, the 3d strength can be increased by more than 4MPa, and the 28d strength can be increased by more than 6MPa, which has good grinding aid and strengthening effects, and can significantly improve the grinding efficiency of large-volume smelting slag cement .

Description

technical field [0001] The invention belongs to the technical field of cement process admixtures, in particular to a cement grinding aid. Background technique [0002] Cement grinding aid is an admixture added during cement grinding to aid in grinding without harming human health and cement concrete performance. The power consumption of cement grinding not only saves the cost of cement production and increases the economic benefits of the enterprise, but also facilitates the comprehensive utilization of industrial waste, realizes low-carbon, circular economic production, and accelerates the process of energy conservation and emission reduction in the cement industry and the green revolution. a good helper. [0003] At present, the cement grinding aids used in China are still produced by the technical route of preparing alcohol amines such as triethanolamine and triisopropanolamine as the main raw materials. Although the unique molecular structure of alcohol amines such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B24/26C04B24/20C04B103/52
CPCC04B40/0039C04B2103/52C04B24/121C04B24/003C04B24/122C04B24/32C04B24/2652C04B24/20
Inventor 冯恩娟司宏振秦尤敏董芹玺宋南京李耀王志强张辉
Owner SHANDONG HONGYI TECH
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