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A kind of concrete containing refining slag and preparation method thereof

A technology of refining slag and concrete, which is applied in the field of solid waste resource utilization and building materials, can solve problems such as the consumption of refining slag, the waste of refining slag hydraulic gelation, and the lack of in-depth research on the stability of refining slag. The effect of reducing production costs and reducing environmental pollution

Active Publication Date: 2020-12-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In the current existing technologies, refining slag is mainly used to recycle additives for iron and steel smelting, to cement pellets, or to return to recycling step by step, but these technologies do not fundamentally eliminate a large amount of refining slag, wasting the water in refining slag Hard gelation, and lack of in-depth research on the stability of refining slag

Method used

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  • A kind of concrete containing refining slag and preparation method thereof
  • A kind of concrete containing refining slag and preparation method thereof
  • A kind of concrete containing refining slag and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of concrete, the cementitious material is prepared from the following raw materials in mass percentage: slag 70.5%, refining slag 17.5%, desulfurization gypsum 12%, the three are mixed and ground to a specific surface area of ​​560m 2 / kg; In concrete, cementitious material accounts for 19.6%, aggregate accounts for 74%, and water reducing agent accounts for 0.06%.

[0035] The concrete mix ratio is shown in the following table: (amount of concrete material per cubic meter: kg / m 3 )

[0036]

[0037] Coarse aggregate is mine waste rock, fine aggregate is tailings sand, and water reducer is solid polycarboxylate high-efficiency water reducer.

[0038] The stability test of cementitious materials is carried out in accordance with GB / T 1346-2011 "Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Methods". The ratio of the stability test refers to the "cementation material" part in the above table, and the cake test method and the R...

Embodiment 2

[0041] A kind of concrete, the cementitious material is prepared from the following raw materials in mass percentage: 70% of slag, 20% of refining slag, 10% of waste pottery mold gypsum, and the three are mixed and ground to a specific surface area of ​​650m 2 / kg; In concrete, cementitious material accounts for 18.2%, aggregate accounts for 76.7%, and water reducing agent accounts for 0.15%.

[0042] The concrete mix ratio is as follows: (amount of concrete material per cubic meter: kg / m 3 )

[0043]

[0044] Coarse aggregate is mine waste rock, fine aggregate is tailings sand, and water reducer is solid polycarboxylate high-efficiency water reducer.

[0045] The stability test of cementitious materials is carried out in accordance with GB / T 1346-2011 "Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Methods". The ratio of the stability test refers to the "cementation material" part in the above table, and the cake test method and the Rayleig...

Embodiment 3

[0048] A kind of concrete, the cementitious material is prepared from the following raw materials in mass percentage: slag 74%, refining slag 15%, fluorine gypsum 11%, the three are mixed and ground to a specific surface area of ​​550m 2 / kg; In concrete, cementitious material accounts for 16.6%, aggregate accounts for 76.7%, and water reducing agent accounts for 0.17%.

[0049] The concrete mix ratio is as follows: (amount of concrete material per cubic meter: kg / m 3 )

[0050]

[0051] The coarse aggregate is limestone stones, the fine aggregate is quartz river sand, and the water reducer is naphthalene-based high-efficiency water reducer.

[0052] The stability test of cementitious materials is carried out in accordance with GB / T 1346-2011 "Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Methods". The ratio of the stability test refers to the "cementation material" part in the above table, and the cake test method and the Rayleigh method...

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Abstract

The invention provides concrete containing refining slag and a preparation method of the concrete. The preparation method comprises the following steps: firstly, grinding and uniformly mixing the following components based on dry base by mass percent: 55 to 75 percent of slag, 15 to 35 percent of the refining slag and 10 to 20 percent of industrial by-product gypsum to obtain a cementing material;secondly, adding water into 15 to 50 percent of the cementing material, 50 to 85 percent of aggregate and 0 to 3 percent of water reducing agent for uniformly stirring, and carrying out pouring molding and curing to obtain a qualified concrete material. According to the preparation method of the concrete, disclosed by the invention, the key problem of poor stability of the refining slag is solved, a whole solid waste system cementing material is prepared by playing the gelling property and the synergistic excitation effect of the slag, and further the concrete material is prepared. The metallurgical industry solid waste refining slag and the industrial by-product gypsum are cooperatively treated; the refining slag can be comprehensively utilized to the maximum extent, resource utilizationrate is improved, environmental load is reduced and the comprehensive resource utilization rate of metallurgical slag in China is obviously improved; meanwhile, the production cost of the concrete isreduced and obvious economic benefits are obtained.

Description

technical field [0001] The invention relates to the field of solid waste resource utilization and building materials, in particular to concrete containing refining slag and a preparation method thereof. Background technique [0002] First of all, the concept of refining slag should be clarified. Many iron and steel enterprises refer to the slag added in the secondary refining process as refining slag or refining synthetic slag, and some iron and steel enterprises refer to the waste slag discharged after the secondary refining of molten steel as refining slag, refining waste slag or casting residue. The refining slag in the present invention refers to the latter. At present, the refining ratio of my country's iron and steel industry has exceeded 70%. In 2017, the annual output of crude steel in my country was 832 million tons, and the refining slag accounted for 3% of the steel production. A rough estimate will produce 17.47 million tons of refining slag every year. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B18/14
CPCC04B18/141C04B28/142C04B28/144C04B2201/50C04B18/12C04B2103/302C04B14/068C04B14/28Y02W30/91
Inventor 倪文李颖徐东许成文高广军
Owner UNIV OF SCI & TECH BEIJING
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