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A kind of highly active auxiliary cementitious material for cement concrete and its preparation method

A technology for auxiliary cementitious materials and cement concrete, which is applied in the field of high-activity auxiliary cementitious materials and their preparation, and can solve the problems of early performance degradation of cementitious materials and concrete, lack of application performance, and low hydration activity of auxiliary cementitious materials. , to achieve the effect of improving the composition of hydration products, fast setting and hardening rate, and high hydration activity

Active Publication Date: 2022-02-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, other industrial wastes such as ground steel slag are lacking in the application performance of cement concrete materials as auxiliary cementitious materials. Therefore, the development and utilization of new high-quality auxiliary cementitious materials is an urgent problem to be solved in the cement concrete industry.
[0005] As another example, the hydration activity of auxiliary cementitious materials is generally low or slow. After replacing part of the cement, the early properties of the cementitious materials and concrete (especially early strength and setting time) tend to decrease, which affects and It limits its application in high-volume cement concrete and its application effect in high-strength cement concrete

Method used

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  • A kind of highly active auxiliary cementitious material for cement concrete and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First, mix 25 parts of air-quenched ladle furnace refining slag, 30 parts of phosphorus tailings, 15 parts of ceramic waste mold gypsum and 30 parts of phosphorus slag according to the mass ratio or parts; secondly, take 10 parts of vitamin C residue, 10 parts Alcohol amine-carboxylic acid polymer, 10 parts of calcium nitrate, 70 parts of water are uniformly mixed according to the mass ratio or parts to make a performance regulator; then, before entering the mill for grinding, 0.3 parts of the performance regulator is The proportion or the number of parts is evenly sprayed on the above-mentioned solid materials; finally, the above-mentioned materials are ground in a ball mill until the specific surface area is 425±10m 2 / kg of micropowder, namely obtain the described highly active auxiliary cementitious material for cement concrete.

Embodiment 2

[0041] First, mix 50 parts of refining slag from air-quenched ladle furnace, 15 parts of phosphorus tailings, 25 parts of ceramic waste mold gypsum and 10 parts of phosphorus slag according to the mass ratio or parts; secondly, take 25 parts of vitamin C residue, 10 parts Alcoholamine-carboxylic acid polymer, 5 parts of calcium nitrate, 60 parts of water are uniformly mixed according to the mass ratio or parts to make a performance regulator; then, before entering the mill for grinding, 0.8 parts of the performance regulator is The proportion or the number of parts is evenly sprayed on the above-mentioned solid materials; finally, the above-mentioned materials are ground in a ball mill until the specific surface area is 425±10m 2 / kg of micropowder, namely obtain the described highly active auxiliary cementitious material for cement concrete.

Embodiment 3

[0043] Firstly, mix 35 parts of air-quenched ladle furnace refining slag, 20 parts of phosphorus tailings, 20 parts of ceramic waste mold gypsum and 25 parts of phosphorus slag according to the mass ratio or parts; secondly, take 20 parts of vitamin C residue, 15 parts of Alcoholamine-carboxylic acid polymer, 10 parts of calcium nitrate, 55 parts of water are uniformly mixed according to the mass ratio or parts to make a performance regulator; then, before entering the mill for grinding, 0.5 parts of the performance regulator is The proportion or the number of parts is evenly sprayed on the above-mentioned solid materials; finally, the above-mentioned materials are ground in a ball mill until the specific surface area is 425±10m 2 / kg of micropowder, namely obtain the described highly active auxiliary cementitious material for cement concrete.

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Abstract

The invention discloses a highly active auxiliary cementitious material for cement concrete, which comprises the following components in parts by mass: 25-50 parts of refining slag from an air-quenched ladle furnace, 15-30 parts of phosphorus tailings, and ceramic waste mold plaster 10-25 parts, 10-30 parts of phosphate slag, 0.1-1.0 parts of performance regulator. Its preparation method includes: first uniformly mixing the refining slag of the air-quenched ladle furnace with phosphorus tailings, ceramic waste mold gypsum and phosphorus slag according to the mass ratio or parts; The agent is evenly sprayed on the above-mentioned solid material according to the mass ratio or the number of parts; finally, the above-mentioned material is ground in a ball mill until the specific surface area is 400m 2 / kg or more of the micropowder, the high activity auxiliary gelling material of the present invention can be obtained. The invention gives full play to the compound superposition effect of several industrial waste residues, has high hydration activity, and can adjust performance, and has high early and late strength, good comprehensive effect, and high adaptability when applied to cement concrete, and has a prospect of popularization and application. broad.

Description

technical field [0001] The invention relates to the technical field of utilization of building material resources from industrial solid waste, and more specifically relates to a highly active auxiliary cementitious material for cement concrete and a preparation method thereof. Background technique [0002] Cement concrete is the most widely used man-made building material in modern times, and it is still the main building material of human society for a long time. However, the cement concrete industry consumes a lot of energy and resources, and the environmental load is serious, especially in our country. In recent years, the use of industrial waste residues as auxiliary cementitious materials in cement concrete can not only reduce the amount of cement used, but also help to save energy, reduce emissions, and reduce consumption. Green, low-carbon and sustainable development of concrete. [0003] At present, the industrial waste slag used as auxiliary cementitious materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/28
CPCC04B40/0042C04B18/142C04B18/145C04B18/16C04B18/12C04B18/18C04B24/28C04B22/085
Inventor 赵计辉杨刚强刘强
Owner SUN YAT SEN UNIV