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High-activity superfine mineral admixture and preparation method thereof

A technology of mineral admixture and high activity, which is applied in the field of concrete admixtures, can solve the problems of complex preparation process and achieve the effect of simple preparation process

Pending Publication Date: 2020-03-24
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome above-mentioned technical deficiencies, propose a kind of highly active superfine mineral admixture and its preparation method, solve the technical problem of existing admixture preparation process complex in the prior art

Method used

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  • High-activity superfine mineral admixture and preparation method thereof
  • High-activity superfine mineral admixture and preparation method thereof
  • High-activity superfine mineral admixture and preparation method thereof

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preparation example Construction

[0016] For the second solution of the present invention, the present invention proposes a kind of preparation method of highly active ultrafine mineral admixture, comprises the steps:

[0017] Drying process, mixing process, coarse grinding process and fine grinding process. Among them, the drying process is specifically drying the granite powder and slag to a moisture content of ≤3%, so as to avoid the smooth progress of the grinding process due to excessive raw material humidity during the grinding process. Preferably, the granite powder and slag are separately Drying; the mixing process is specifically mixing the dried granite powder, dried slag, fly ash, enhanced activation material, activator and desulfurized gypsum in proportion to obtain the first mixture; the coarse grinding process is Grinding the above first mixture to a specific surface area ≥ 400m 2 / kg to obtain the second mixture; the fine grinding process is to grind the above-mentioned second mixture to a spec...

Embodiment 1～5

[0030] Embodiments 1 to 5 provide 5 different highly active ultrafine mineral admixtures respectively, which are obtained through the following steps:

[0031] Mix the dried granite powder, dried slag, fly ash, activator, reinforcing and activating material and desulfurized gypsum according to a certain ratio, and then get high-quality powder after coarse grinding, sieving, fine grinding and sieving Active microfine mineral admixture.

[0032] See Table 1 for the raw material proportions and process parameters of the highly active ultrafine mineral admixture obtained in Examples 1-5.

[0033] Table 1

[0034]

[0035]

[0036] As can be seen from Table 1, by adopting the raw materials of the present invention and strictly controlling the process parameters in the present invention, such as steel ball or steel forging gradation, ball milling time, etc., specific surface area ≥ 700m can be obtained 2 / kg of highly active ultrafine mineral admixtures.

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Abstract

The invention discloses a high-activity superfine mineral admixture and a preparation method thereof, and the high-activity superfine mineral admixture is composed of the following raw materials in percentage by weight: 20-60% of granite powder, 5-25% of slag, 20-50% of fly ash, 0.1-10% of an excitant, 0.1-3% of a reinforced activation material and 1-5% of desulfurized gypsum. The granite powder,the furnace slag, the coal ash, the excitant, the reinforced activation material and the desulfurized gypsum are mixed and subjected to coarse grinding and fine grinding to obtain the high-activity superfine mineral admixture, the preparation process is simple, and the obtained high-activity superfine mineral admixture reaches the standard of S95 grade or above.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a highly active ultrafine mineral admixture and a preparation method thereof. Background technique [0002] With the increasingly severe energy situation and increasing industrial solid waste, environmental protection and ecological sustainable development have become urgent problems to be solved. Granite stone powder is the powder produced by stone factories in stone sawing, cutting, grinding and other processing processes. The particle size distribution of the powder is uneven, and the recycling rate is extremely low. Most of them are stacked without treatment. Pollution is generated, a large amount of resources are wasted, and the sustainable economic development of the cycle is restricted. [0003] The chemical composition of granite stone powder is similar to industrial fly ash, and its silica and alumina account for more than 90%. At present, researchers have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14C04B28/04
CPCC04B28/04C04B40/0042C04B14/048C04B18/141C04B18/08C04B22/145C04B18/025C04B18/146C04B12/04C04B24/04
Inventor 黄修林桂明祥
Owner HUBEI UNIV
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