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Mineral slag micro powder and preparation method thereof

A technology for slag micropowder and slag, which is applied in the field of construction, can solve the problems of insufficient cement concrete strength, large cement concrete dosage, and insufficient densification performance, etc., so as to improve the reaction performance of alkali-resistant aggregates, reduce the heat of hydration, and inhibit alkali. Effects of Aggregate Reaction

Inactive Publication Date: 2015-10-14
ZHOUSHAN HUIBON BUILDING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the amount of cement concrete used in the project is large, the workability is poor, the early strength performance is poor, and the phenomenon of hydration heat is prone to occur, so that the strength of cement concrete is not high enough, the corrosion resistance is poor, the amount of water is large, and the compactness performance is not strong enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The components of the slag micropowder are calculated by weight percentage: 75% of blast furnace slag, 15% of coal slag, and 10% of fly ash.

[0025] The preparation method of slag micropowder comprises the following steps:

[0026] (1) Convey the blast furnace slag to the drying system for drying treatment at a rate of 30 tons per hour. After the moisture in the blast furnace slag is dried, it is sent to the silo;

[0027] (2) Send the dry slag in the silo to the roller press for pre-grinding, and extrude it into a cake and discharge it from the roller press;

[0028] (3) Send the material cake discharged from the roller press into the dispersing classifier for breaking up, and then separate the dry slag fine powder with a particle size of less than 2mm from the dry slag coarse powder with a particle size larger than 2mm;

[0029] (4) Return the coarse dry slag powder with a particle size greater than 2mm to the silo, and repeat step (2);

[0030] (5) Send the dry sl...

Embodiment 2

[0036] The components of the slag fine powder are calculated by weight percentage: 80% of blast furnace slag, 10% of coal slag, and 10% of fly ash. According to the above components, the materials are taken in proportion, and the preparation method is the same as in Example 1.

Embodiment 3

[0038] The components of the slag micropowder are calculated by weight percentage: 85% of blast furnace slag, 5% of coal slag, and 10% of fly ash. According to the above components, the materials are taken in proportion, and the preparation method is the same as in Example 1.

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Abstract

The invention discloses a mineral slag micro powder and a preparation method thereof. The mineral slag micro powder is composed of following raw materials, by weight, 75-85% of blast furnace slag, 5-15% of coal slag and 10% of fly ash. The mineral slag micro powder can greatly improve strength of cement concrete, can be used for preparing ultrahigh-strength cement concrete, can effectively improve the anti-erosion performance of the cement concrete and is especially suitable for anti-corrosion engineering. The mineral slag micro powder can significantly reduce water bleeding and improve workability of the cement concrete, can significantly improve the compactness and the anti-permeability of the cement concrete, can significantly hydration heat of the cement concrete, and is suitable for preparing large-volume concrete. The mineral slag micro powder can effectively inhibit an alkali-aggregate reaction of the cement concrete, can significantly improve the performance of alkali-aggregate reaction resistance of the cement concrete and can improve the durability of the cement concrete.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a slag micropowder and a preparation method thereof. Background technique [0002] Concrete is an important building material in construction engineering. At present, the amount of cement concrete used in the project is large, the workability is poor, the early strength performance is poor, and the phenomenon of hydration heat is prone to occur, so that the strength of cement concrete is not high enough, the corrosion resistance is poor, the amount of water is large, and the compactness performance is not strong enough. In order to reduce the production cost of concrete, various fillers are added to concrete, and slag micropowder is a new filler. Contents of the invention [0003] The purpose of the present invention is to overcome the existing defects and provide a concrete dry-mixed mortar and a preparation method thereof, which can reduce the amount of concrete cement,...

Claims

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Application Information

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IPC IPC(8): C04B18/30C04B18/14C04B18/08C04B18/12
CPCY02W30/91
Inventor 虞海舟
Owner ZHOUSHAN HUIBON BUILDING MATERIAL CO LTD