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Steel slag concrete with steel slag replacing broken stone and preparation method thereof

A technology of steel slag concrete and ordinary concrete, which is applied in the field of concrete preparation, can solve the problems of difficulty in meeting use requirements, water absorption, large shrinkage rate, etc., and achieves the effects of reducing expansion and shrinkage, simple process and easy operation.

Inactive Publication Date: 2020-06-19
河南国泰建筑安装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main way to utilize steel slag in my country is to recycle it within the iron and steel company, replace lime as a solvent, and return it to the blast furnace or sintering furnace as a raw material for ironmaking; because steel slag gravel has high density, high strength, rough surface, wear resistance, and durability Good and other advantages, so it can also be used for roadbeds, railway roadbeds, etc., but it also has the problems of water absorption and large shrinkage, which makes it difficult to meet the use requirements

Method used

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  • Steel slag concrete with steel slag replacing broken stone and preparation method thereof

Examples

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Effect test

Embodiment 1

[0015] A kind of steel slag concrete in which steel slag replaces gravel, the steel slag concrete label is C30, and its preparation method is as follows:

[0016] S101, pulverizing the steel slag after hot stewing to obtain coarse aggregate; taking 30kg of steel slag with a particle size of 5-15mm and 120kg of steel slag with a particle size of 5-25mm;

[0017] S102. Take 50kg of medium sand that meets the requirements of ordinary concrete preparation;

[0018] S103, take 24kg of 42.5 cement, 3kg of grade II fly ash, 8kg of S95 grade mineral powder, and 0.7kg of polycarboxylate superplasticizer;

[0019] S104, uniformly mixing steel slag, cement, fly ash, mineral powder, sand, and polycarboxylate water reducer to obtain steel slag concrete;

[0020] S105, curing the steel slag concrete.

Embodiment 2

[0022] A kind of steel slag concrete in which steel slag replaces gravel, the steel slag concrete label is C25, and its preparation method is as follows:

[0023] S101, pulverizing the steel slag after hot stewing to obtain coarse aggregate; taking 30kg of steel slag with a particle size of 5-15mm and 120kg of steel slag with a particle size of 5-25mm;

[0024] S102. Take 53kg of medium sand that meets the requirements of ordinary concrete preparation;

[0025] S103, take 21kg of 42.5 cement, 3kg of grade II fly ash, 8kg of S95 grade mineral powder, and 0.7kg of polycarboxylate superplasticizer;

[0026] S104, uniformly mixing steel slag, cement, fly ash, mineral powder, sand, and polycarboxylate water reducer to obtain steel slag concrete;

[0027] S105, curing the steel slag concrete.

Embodiment 3

[0029] A kind of steel slag concrete in which steel slag replaces gravel, the steel slag concrete label is C20, and its preparation method is as follows:

[0030] S101, pulverizing the steel slag after hot stewing to obtain coarse aggregate; taking 30kg of steel slag with a particle size of 5-15mm and 120kg of steel slag with a particle size of 5-25mm;

[0031] S102, take 56kg of medium sand that meets the requirements of ordinary concrete preparation;

[0032] S103, take 18kg of 42·5 cement, 3kg of grade II fly ash, 8kg of S95 grade mineral powder, and 0.7kg of polycarboxylate superplasticizer;

[0033] S104, uniformly mixing steel slag, cement, fly ash, mineral powder, sand, and polycarboxylate water reducer to obtain steel slag concrete;

[0034] S105, curing the steel slag concrete.

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Abstract

The invention relates to the technical field of concrete preparation, specifically to steel slag concrete with steel slag replacing broken stone and a preparation method for the steel slag concrete. The steel slag concrete with the steel slag replacing the broken stone comprises the following raw materials: the steel slag, cement, fly ash, mineral powder, sand and a polycarboxylate superplasticizer. According to the invention, waste steel slag is used as aggregate and subjected to heat braising treatment, so free calcium oxide and free magnesium oxide in the steel slag are subjected to a hydration reaction, and expansion and shrinkage of the steel slag are reduced; meanwhile, the water content of the steel slag is saturated, so the problem of quick slump loss of the steel slag concrete with the steel slag replacing the broken stonel in the production process is solved. The concrete prepared by taking the cement, the fly ash and the mineral powder as cementing materials has the advantages of high strength and strong stability and stretch resistance. The preparation method comprises the following steps: subjecting the steel slag to hot braising, then carrying out crushing so as to obtain coarse aggregate, then allowing the steel slag to replace the broken stone, and preparing the steel slag concrete according to a preparation method of common concrete. The preparation method provided by the invention is simple in process, easy and convenient in operation, and capable of recycling the waste steel slag.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a steel slag concrete in which steel slag replaces gravel and a preparation method thereof. Background technique [0002] Steel slag is an inevitable product of converter steelmaking, accounting for about 10% to 15% of crude steel production. The main mineral composition of steel slag is dicalcium silicate, tricalcium silicate, calcium magnesium olivine, calcium magnesium rhodoxene, dicalcium ferrite, free calcium oxide, free magnesium oxide, and some residual steel and iron oxide are embedded . The main way to utilize steel slag in my country is to recycle it within the iron and steel company, replace lime as a solvent, and return it to the blast furnace or sintering furnace as a raw material for ironmaking; because steel slag gravel has high density, high strength, rough surface, wear resistance, and durability Good and other advantages, so it can also be used for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/142C04B18/08C04B18/12C04B14/06C04B2103/302
Inventor 贾书轩颜炜卫欣冯亚丽孙文浩聂乃忠吕卫晓付岩冯欢欢孔超超
Owner 河南国泰建筑安装有限公司
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