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A water-reducing early-strength mineral admixture and its preparation method

A mineral admixture and water-reducing technology, which is applied in the field of admixture preparation, can solve the problems of inability to apply high-strength high-performance concrete and low activity index, and achieve improved workability, high early activity index, and increased early strength. Effect

Active Publication Date: 2022-05-03
江苏博拓新型建筑材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent CN201911314954.9 An easy-flowing composite mineral admixture and its preparation method and the mortar prepared by using the admixture. The composite mineral admixture prepared is made of mineral powder, fly ash floating beads, quartz sand tailings, etc. The admixture can improve the fluidity of mortar, but its 7d and 28d activity index is low, only 65%, so it cannot be used in high-strength and high-performance concrete

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  • A water-reducing early-strength mineral admixture and its preparation method
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  • A water-reducing early-strength mineral admixture and its preparation method

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Embodiment 1

[0023] A water-reducing early-strength mineral admixture comprises the following raw materials in parts by weight: 50 parts of fly ash microbeads, 20 parts of fluorochlorate cement clinker, 20 parts of superfine mineral powder, 10 parts of silicon micropowder, 0.5 parts of plastic regulator, 0.5 parts of early strength agent.

[0024] Among them, the plastic regulator is nano-SiO 2 - polycarboxylate shell-core nanocomposite particles, the early strength agent includes lithium hydroxide, triethanolamine, and sodium sulfate at a ratio of parts by weight of 1:0.2:1.

[0025] The preparation method of the water-reducing early-strength mineral admixture comprises the following steps: putting fly ash microbeads and calcium fluoroaluminate cement clinker into an airflow mill, grinding for 0.5h, and mixing the mixture with the The superfine mineral powder is added into the high-speed shear mixer, and the surface of the mixture is coated with superfine mineral powder. After the surfac...

Embodiment 2

[0027] A water-reducing early-strength mineral admixture comprises the following raw materials in parts by weight: 57 parts of fly ash microbeads, 18 parts of fluorochlorate cement clinker, 17 parts of superfine mineral powder, 4 parts of silicon micropowder, 0.5 parts of plastic regulator, 0.8 parts of early strength agent.

[0028] Among them, the plastic regulator is nano-SiO 2 - Polycarboxylic acid shell-core nanocomposite particles, the early strength agent includes lithium hydroxide, triethanolamine, and sodium sulfate in a ratio of parts by weight of 1:0.2-0.3:1-3.

[0029] The preparation method of the water-reducing early-strength mineral admixture comprises the following steps: during preparation, put fly ash microbeads and calcium fluoroaluminate cement clinker into an airflow mill, grind for 0.6h, and mix the The material and ultrafine mineral powder are added to the high-speed shear mixer, and the surface of the mixture is coated with ultrafine mineral powder. Af...

Embodiment 3

[0031] A water-reducing early-strength mineral admixture comprises the following raw materials in parts by weight: 64 parts of fly ash microbeads, 16 parts of fluorochlorate cement clinker, 14 parts of superfine mineral powder, 6 parts of silicon micropowder, 0.8 parts of plastic regulator, 0.8 parts of early strength agent.

[0032] Among them, the plastic regulator is nano-SiO 2 - Polycarboxylic acid shell-core nanocomposite particles, the early strength agent includes lithium hydroxide, triethanolamine, and sodium sulfate in a ratio of parts by weight of 1:0.2:2.

[0033] The preparation method of the water-reducing early-strength mineral admixture comprises the following steps: during preparation, put fly ash microbeads and calcium fluoroaluminate cement clinker into an airflow mill, grind for 0.7h, and grind the mixture Add ultra-fine mineral powder into the high-speed shear mixer to coat the surface of the mixture with ultra-fine mineral powder. After the surface coatin...

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Abstract

The invention discloses a water-reducing early-strength mineral admixture and a preparation method thereof. The admixture includes 50-80 parts of fly ash microbeads, 10-20 parts of calcium fluoroaluminate cement clinker, superfine mineral powder 8~20 parts, 1~5 parts of silicon micropowder, 0.5~1 part of plastic modifier, 0.5~1 part of early strength agent. Put the fly ash microbeads and calcium fluoroaluminate cement clinker into the jet mill and grind for 0.5~1h. After grinding, add the mixture and ultrafine mineral powder into the high-speed shear mixer to make the surface of the mixture Coating ultra-fine mineral powder treatment, after the surface coating is completed, add silicon micropowder and mix and homogenize to obtain mineral admixture, add plastic regulator and early strength agent, mix and homogenize for 10 minutes, and then the water-reducing early-strength mineral can be obtained Admixtures. The water-reducing early-strength mineral admixture prepared by the invention has an auxiliary water-reducing function, can significantly improve the workability of the concrete mixture, and meanwhile has a high early-stage activity index, improves the early-stage strength of the concrete, and develops steadily in the later-stage strength.

Description

technical field [0001] The invention relates to the technical field of admixture preparation, in particular to a water-reducing early-strength mineral admixture and a preparation method thereof. Background technique [0002] With the rapid development of my country's construction industry, there are higher requirements for the working performance, strength grade and durability of concrete, and the demand for high-performance concrete is increasing. High-performance concrete is widely used in the construction industry for its excellent mechanical properties and durability. However, the preparation of high-performance concrete has higher requirements on the performance of various raw materials. At present, the mineral admixtures widely used in high-performance concrete mainly include ground slag powder, silica powder, and metakaolin, but they are expensive and cannot be used. Conducive to the disadvantages of concrete fluidity, there are certain limitations in application. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C04B103/14C04B103/30
CPCC04B40/0039C04B2103/14C04B2103/302C04B18/082C04B7/326C04B18/12C04B18/146C04B24/24C04B22/062C04B24/122C04B22/147
Inventor 朱宝贵吴浩李云杰肖钧羊中军罗乃将吴其胜
Owner 江苏博拓新型建筑材料股份有限公司