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Roller steel slag fine aggregate and composite slag powder cemented material

A technology of slag powder and fine aggregate, applied in cement production, etc., can solve the problems of poor grindability of steel slag and cement, insignificant cost reduction, and increased production cost, so as to achieve good hydration activity and promote sustainable development of the national economy , the effect of reducing energy consumption

Inactive Publication Date: 2011-01-05
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is only mixed with cement in the form of admixture, which cannot completely replace cement, and the addition amount is small. The cement is still the main material, and the cost reduction is not obvious. In addition, the steel slag powder needs to be dried and ground Fine, and steel slag is less grindable than cement, which will lead to a substantial increase in production costs

Method used

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  • Roller steel slag fine aggregate and composite slag powder cemented material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh the composite slag powder and the natural water-containing drum steel slag fine aggregate with a particle size of 0-4.75 mm and mix them evenly at a weight ratio of 1:2 to prepare the cementing material A1. Among them, the composite slag powder is calculated as 100% by weight, the combined material accounts for 25%, and the slag powder accounts for 75%. The combined material (calculated as 100% by weight) is composed of 35% gypsum and 65% Portland cement clinker after grinding, and the specific surface area is greater than 400m 2 / kg.

Embodiment 2

[0034] Weigh the composite slag powder and the natural water-containing drum steel slag fine aggregate with a particle size of 0-4.75 mm and mix them evenly at a weight ratio of 1:1 to prepare the cementitious material A2. Among them, the composite slag powder is calculated as 100% by weight, the composite material accounts for 8%, and the slag powder accounts for 92%. The combined material (calculated as 100% by weight) is composed of 99% gypsum and 1% admixture NNO after grinding, and the specific surface area is greater than 400m 2 / kg.

Embodiment 3

[0036] Weigh the composite slag powder and the natural water-containing drum steel slag fine aggregate with a particle size of 0-4.75 mm and mix them evenly at a weight ratio of 1:3 to prepare the cementitious material A3. Among them, the composite slag powder is calculated as 100% by weight, the combined material accounts for 35%, and the slag powder accounts for 65%. The combined material (calculated as 100% by weight) is composed of 25% gypsum and 75% Portland cement clinker after grinding, and the specific surface area is greater than 400m 2 / kg.

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Abstract

The invention relates to a roller steel slag fine aggregate and composite slag powder cemented material, which solves the problem that the existing steel slag can not completely replace cement for producing the cemented material owing to high production cost and can be only made into low-strength (less than C30) concrete. The cemented material is composed of composite slag powder and roller steel slag in the weight ratio of 1:1-4; and the composite slag powder is composed of 8-35wt% of a blended material and 65-92wt% of the slag powder, wherein, the blended material is made by finely grinding at least one of 25-99wt% of plaster, 0-75wt% of silicate cement clinker and 0-5wt% of an additive. The cemented material of the invention can completely replace a cementitious material, and the material has the advantages of high strength grade, simple production process, low production cost and stable product performances, thus being especially applicable to preparing high-strength concrete with good service performances and various engineering with higher flexural strength requirement.

Description

technical field [0001] The invention relates to a cementing material for construction engineering, in particular to a drum steel slag fine aggregate composite slag powder cementing material. Background technique [0002] When preparing concrete, cement is usually used as a binding material, and then mixed with sand, gravel and water to make concrete. The most common application of steel slag in concrete preparation is to use steel slag instead of sand to prepare concrete. In order to further increase its added value, researchers have considered applying steel slag to cement materials in recent years. There are two public methods: one is to use steel slag fine powder Adding it into cement as an admixture can eliminate the problem of the difference in grindability in the production of steel slag cement. Steel slag can be ground to a certain fineness to remove metallic iron to the greatest extent, and the crystal structure of the material can be reorganized through ultra-fine g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21
CPCY02P40/10
Inventor 方宏辉薛改凤李继铮朱书景
Owner 武汉钢铁有限公司
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