Permeable concrete based on coal gangue and preparation method thereof

A technology of permeable concrete and coal gangue, applied in the field of building materials, can solve the problem of not using coal gangue at the same time, and achieve the effects of saving natural crushed stone and cement resources, increasing binding capacity and reducing consumption

Active Publication Date: 2021-03-19
山西潞安环保能源开发股份有限公司常村煤矿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no report on using coal gangue as cementitious material and aggregate to prepare permeable concrete, avoiding the use of cement and natural sand

Method used

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  • Permeable concrete based on coal gangue and preparation method thereof
  • Permeable concrete based on coal gangue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0036] The ratio of raw materials used to prepare permeable concrete in Examples 1-5 of the present invention is shown in Table 1.

[0037]

[0038] After testing, the flexural strength, compressive strength and water permeability coefficient measurement data of the permeable concrete test blocks prepared in Examples 1-5 after 28 days of standard curing are shown in Table 2.

[0039]

[0040] It can be seen from Table 2 that the flexural strength, compressive strength, and water permeability coefficient of the permeable concrete prepared in Examples 1 to 5 of the present invention are all within the standard value range compared with the standard value of permeable concrete for construction, and meet the standard for construction.

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Abstract

The invention discloses coal gangue-based pervious concrete, which is prepared by mixing the following raw materials in percentage by mass: 65 to 70 percent of treated coal gangue, 16 to 24 percent ofcalcined coal gangue, 4 to 8 percent of water glass, 2 to 5 percent of sodium hydroxide, 0.5 to 1 percent of water reducing agent and 4 to 6 percent of water, wherein the coal gangue is activated bythe mixed aqueous solution of hydrofluoric acid and acetic acid, and the particle size is 5mm-10mm, and the calcined coal gangue is calcined coal gangue particles with the particle size of less than 2mm. According to the pervious concrete, solid waste coal gangue is completely used as aggregate and a cementing material, and the high strength of the pervious concrete is achieved while the high pervious rate of the concrete is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a permeable concrete, in particular to a permeable concrete prepared by using coal gangue as an aggregate. Background technique [0002] Pervious concrete is an important part of sponge city construction. It has the characteristics of many pores, water permeability and air permeability. It can be used on sidewalks and large squares to avoid water accumulation on the ground when it rains. [0003] At present, the common permeable concrete is prepared with cement as the cementitious material, gravel as the aggregate, and certain admixtures. However, permeable concrete needs a large amount of natural sand and cement, which is not conducive to the country's energy saving and emission reduction and the conservation of natural sand resources, and sand mining and cement production are also not conducive to ecological environmental protection. [0004] Coal gangue is a kind of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B38/00C04B20/02C04B7/24C04B7/44C04B18/12
CPCC04B28/02C04B20/026C04B20/023C04B7/24C04B7/44C04B2111/00284C04B18/12C04B12/04C04B22/062C04B2103/302C04B38/0041Y02P40/10
Inventor 芦志刚王菲张红鸟李小凯李晓军焦利波刘强黄伦杰张志勇
Owner 山西潞安环保能源开发股份有限公司常村煤矿
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