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C30-grade all-solid-waste concrete and preparation method thereof

A waste concrete and carbide slag technology, applied in the field of building materials, can solve the problems of limited application, insufficient concrete strength, low strength, etc., and achieve the effects of reducing production costs, reducing excessive mining of stone materials, and reducing high energy consumption

Active Publication Date: 2020-12-25
YANSHAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventors of the present invention found that the strength of concrete directly using alkali slag as an alkali-activated cementitious material cannot even reach the level of C20, and the low strength greatly limits its application

Method used

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  • C30-grade all-solid-waste concrete and preparation method thereof
  • C30-grade all-solid-waste concrete and preparation method thereof
  • C30-grade all-solid-waste concrete and preparation method thereof

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preparation example Construction

[0034] The preparation method of the all-solid waste concrete of the present invention can be a general concrete preparation method, but the relevant raw materials are replaced with the alkali slag-carbide slag, slag, fly ash, and iron tailing sandstone of the present invention. But in order to be able to achieve better strength, it is preferably prepared by the following steps:

[0035] S1. Put the alkali slag and the carbide slag stock solution into static stratification to obtain the upper clear liquid and the lower slurry of the alkali slag and the carbide slag respectively, and store the upper clear liquid and the lower slurry separately for later use; the upper clear liquid of the calcium carbide slag, its OH - The concentration is 0.032-0.063mol / L, the pH value is 12.5-12.8; the moisture content of the slurry in the lower part of the alkali slag and carbide slag is 50%-60%.

[0036] S2. Pretreat the lower slurry of alkali slag and carbide slag, dry it naturally, crush i...

Embodiment 1

[0041] Alkali slag, carbide slag, slag, fly ash, iron tailings, iron tailings, water reducing agent by weight: 52-156 parts of alkali slag, 26-78 parts of calcium carbide slag, 182-234 parts of slag , 104-208 parts of fly ash, 170-190 parts of water, 460-510 parts of iron tailings, 1030-1150 parts of iron tailings, 1-3 parts of polycarboxylate superplasticizer.

[0042] The specific mixing ratio of all solid waste concrete is shown in the following table: (Concrete material consumption per cubic meter: kg / m 3 ):

[0043]

[0044] According to the above mixing ratio, the specific preparation steps are as follows:

[0045] S1. Put the alkali slag and the carbide slag stock solution into static stratification to obtain the upper clear liquid and the lower slurry of the alkali slag and the carbide slag respectively, and store the upper clear liquid and the lower slurry separately for later use;

[0046] S2. Pretreat the lower slurry of alkali slag and carbide slag, dry it nat...

Embodiment 2

[0076] Alkali slag, carbide slag, slag, fly ash, iron tailings, iron tailings, water reducing agent by weight: 52-156 parts of alkali slag, 26-78 parts of calcium carbide slag, 182-234 parts of slag , 104-208 parts of fly ash, 170-190 parts of water, 460-510 parts of iron tailings, 1030-1150 parts of iron tailings, 1-3 parts of polycarboxylate superplasticizer.

[0077] The specific mixing ratio of all solid waste concrete is shown in the following table: (Concrete material consumption per cubic meter: kg / m 3 ):

[0078]

[0079] According to the above mixing ratio, the specific preparation steps are as follows:

[0080] S1. Put the alkali slag and the carbide slag stock solution into static stratification to obtain the upper clear liquid and the lower slurry of the alkali slag and the carbide slag respectively, and store the upper clear liquid and the lower slurry separately for later use;

[0081]S2. Pretreat the lower slurry of alkali slag and carbide slag, dry it natu...

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Abstract

The invention provides a C30-grade all-solid-waste concrete and a preparation method thereof. Alkali residue carbide slag is utilized to synergistically excite a slag and fly ash composite cementing material to replace cement, and iron tailing sandstone is utilized to replace traditional sandstone. The all-solid-waste concrete is prepared from the following components in parts by weight: 52 to 156parts of alkaline residue, 26 to 78 parts of carbide slag, 182 to 234 parts of slag, 104 to 208 parts of fly ash, 170 to 190 parts of water, 460 to 510 parts of iron tailing sand, 1030 to 1150 partsof iron tailing ore and 1 to 3 parts of polycarboxylate superplasticizer. The new all-solid-waste concrete is prepared from various industrial solid waste residues, the 28d strength reaches 30 MPa orabove, waste is turned into wealth, the environment is protected, and meanwhile the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of building materials, and particularly relates to a C30 grade all-solid waste concrete using alkali slag, calcium carbide slag, slag, fly ash and iron tailing sandstone and a preparation method thereof. Background technique [0002] With the development of industrial production, the amount of industrial waste is increasing day by day. In particular, industries such as metallurgy and thermal power generation have the largest emissions. Industrial waste is huge in quantity, various in variety and complex in composition, making it quite difficult to deal with. Now only a limited number of industrial wastes are utilized, such as the United States, Sweden and other countries have utilized iron and steel slag, and countries such as Japan and Denmark have utilized fly ash and coal slag. Other industrial wastes are still mainly stored passively, and some harmful industrial solid wastes are disposed of by landfill, incinera...

Claims

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Application Information

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IPC IPC(8): C04B28/22
CPCC04B28/186C04B2201/50C04B18/0481C04B18/141C04B18/08C04B18/12C04B24/24Y02W30/91
Inventor 赵庆新张兆云郭维超桑兆虎潘慧敏齐文跃杜建军
Owner YANSHAN UNIV
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