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Steel slag concrete and preparation method thereof

A technology of steel slag concrete and steel slag, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of lack of steel slag concrete preparation methods, etc., achieve shortened final setting time, simple preparation method, and reduce cracking Effect

Active Publication Date: 2021-03-26
湖北环沙再生资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, there is currently a lack of a kind of steel slag concrete and its preparation method that can meet the above needs in the field

Method used

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  • Steel slag concrete and preparation method thereof
  • Steel slag concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Concrete raw material is weighed by table 1, and step preparation step is as follows:

[0036] (1) Grind steel slag to 200 mesh to obtain steel slag powder, then add potassium hexatitanate, boric acid, anhydrous calcium hexaaluminate, plaster of paris and stir for 20 minutes, let stand at 130°C for 10 minutes, and collect the specific surface area >500m 2 / kg of mixed powder;

[0037] (2) Stir and mix the mixed powder obtained in step (1) with Portland cement, fly ash, light-burned magnesia, gravel, machine-made sand, and half of the water for 30 minutes to obtain a slurry;

[0038] (3) After mixing the remaining water and the water reducing agent, add it to the slurry in step (2), and continue to stir and mix for 5 minutes;

[0039] (4) Collect the slurry and pour it into the mold, put it on a vibrating table for vibration molding, after molding, cure it in an environment with a temperature of 20±2°C and a relative humidity of not less than 95% for 24 hours, then dem...

Embodiment 2

[0041] (1) Grind steel slag to 300 mesh to obtain steel slag powder, then add potassium hexatitanate, boric acid, anhydrous calcium hexaaluminate, and plaster of paris and stir and mix for 30 minutes, let stand at 140°C for 15 minutes, and collect the specific surface area >500m 2 / kg of mixed powder;

[0042] (2) Stir and mix the mixed powder obtained in step (1) with Portland cement, fly ash, light-burned magnesia, gravel, machine-made sand, and half of the water for 40 minutes to obtain a slurry;

[0043] (3) After mixing the remaining water and the water reducing agent, add it to the slurry in step (2), and continue to stir and mix for 10 minutes;

[0044] (4) Collect the slurry and pour it into the mold, put it on a vibrating table for vibration molding, after molding, cure it in an environment with a temperature of 20±2°C and a relative humidity of not less than 95% for 24 hours, then demold it, and then place it in a curing box Breed in reclaimed water for 4 days, and...

Embodiment 3

[0046] (1) Grind steel slag to 300 mesh to obtain steel slag powder, then add potassium hexatitanate, boric acid, anhydrous calcium hexaaluminate, and plaster of paris and stir and mix for 30 minutes, let stand at 130°C for 15 minutes, and collect the specific surface area >500m 2 / kg of mixed powder;

[0047] (2) Stir and mix the mixed powder obtained in step (1) with Portland cement, fly ash, light-burned magnesia, gravel, machine-made sand, and half of the water for 40 minutes to obtain a slurry;

[0048] (3) After mixing the remaining water and the water reducing agent, add it to the slurry in step (2), and continue to stir and mix for 5 minutes;

[0049](4) Collect the slurry and pour it into the mold, put it on a vibrating table for vibration molding, after molding, cure it in an environment with a temperature of 20±2°C and a relative humidity of not less than 95% for 24 hours, then demold it, and then place it in a curing box Breed in reclaimed water for 4 days, and y...

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Abstract

The invention relates to a steel slag concrete and a preparation method thereof. The steel slag concrete is prepared from the following raw materials in parts by weight: 100 to 130 parts of Portland cement, 60 to 75 parts of water, 15 to 25 parts of gypsum, 35 to 50 parts of fly ash, 10 to 20 parts of light calcined magnesia, 120 to 180 parts of coarse aggregate, 140 to 200 parts of fine aggregate, 70 to 90 parts of steel slag, 10 to 20 parts of potassium hexatitanate, 2 to 5 parts of boric acid, 6 to 12 parts of anhydrous calcium sulphoaluminate and 3 to 5 parts of polycarboxylic water. The potassium hexatitanate is added into the steel slag concrete, so that the final setting time of the concrete is effectively shortened, and the final setting time of the concrete can better meet the requirements of building construction. The change rule of the compressive strength of the steel slag concrete is equivalent to that of 52.5 R Portland cement, but the average compressive strength of thesteel slag concrete is far higher than that of ordinary Portland cement.

Description

technical field [0001] The invention relates to the technical field of building material preparation, in particular to steel slag concrete and a preparation method thereof. Background technique [0002] Concrete is an indispensable building material in the process of engineering construction, and it is also the most widely used building material at present. However, the traditional cement concrete industry produces a large amount of energy consumption and waste of resources, and the harm to the ecological environment is also very serious. The application of metallurgical waste slag in the concrete industry can consume the metallurgical solid waste that is currently widely stockpiled on a large scale, and at the same time save energy and resource consumption in the cement concrete production process and reduce the cost of concrete, which has obvious economic benefits and environmental benefits. benefit. [0003] Steel slag is obtained by cooling the remaining steelmaking sl...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/14
CPCC04B28/14C04B2201/52C04B2201/50C04B7/02C04B18/08C04B14/304C04B14/02C04B14/06C04B18/142C04B22/08C04B22/0013C04B22/142C04B2103/302Y02W30/91
Inventor 陈辉曹国兵徐新强
Owner 湖北环沙再生资源有限公司
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