Coal gangue all-aggregate concrete and preparation method thereof

A technology of coal gangue and full aggregate, applied in the field of coal gangue full aggregate concrete and its preparation, can solve the problems of land resource occupation, complicated process, low efficiency, etc., and achieve the effects of improving production efficiency, improving macroscopic mechanical properties, and reducing costs

Pending Publication Date: 2022-05-10
CHINA UNIV OF MINING & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, this application solves the existing problems of coal gangue occupation of land resources and the environment, the coal gangue is selected, crushed and screened, and the process is complicated and inefficient; it provides a coal gangue full aggregate concrete and its Preparation

Method used

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  • Coal gangue all-aggregate concrete and preparation method thereof
  • Coal gangue all-aggregate concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of coal gangue full aggregate concrete comprises the following steps:

[0036] In the first step, the raw materials of coal gangue full aggregate concrete include the following proportions by mass: Portland cement, coal gangue fine aggregate, coal gangue coarse aggregate, external water reducing agent, and water are 271 parts and 691 parts respectively. , 1228 copies, 1.4 copies and 190 copies;

[0037] Step 2: Add coal gangue coarse aggregate, coal gangue fine aggregate, and Portland cement into the mixer in turn, mix and stir well, and fully stir for 2 minutes; after mixing evenly, slowly add the mixed water reducer and water, Fully stir for 3 minutes;

[0038] Step 3: After testing, the 28d compressive strength of coal gangue full aggregate concrete reaches 30.02MPa.

Embodiment 2

[0040] The preparation method of coal gangue full aggregate concrete comprises the following steps:

[0041] In the first step, the raw materials of coal gangue full aggregate concrete include the following proportions by mass: Portland cement, coal gangue fine aggregate, coal gangue coarse aggregate, water reducing agent, and water are 345 parts and 664 parts respectively. 1180, 1.7 and 190;

[0042] Step 2: Add coal gangue coarse aggregate, coal gangue fine aggregate, and Portland cement into the mixer in turn, mix and stir well, and fully stir for 2 minutes; after mixing evenly, slowly add the mixed water reducer and water, Stir fully for 3 minutes; the third step: After testing, the 28d compressive strength of coal gangue full aggregate concrete reaches 41.28MPa.

Embodiment 3

[0044] The preparation method of coal gangue full aggregate concrete comprises the following steps:

[0045] In the first step, the raw materials of coal gangue full aggregate concrete include the following proportions by mass: Portland cement, coal gangue fine aggregate, coal gangue coarse aggregate, water reducing agent, and water are 475 parts and 617 parts respectively. 1098, 2.4 and 190;

[0046] Step 2: Add coal gangue coarse aggregate, coal gangue fine aggregate, and Portland cement into the mixer in turn, mix and stir well, and fully stir for 2 minutes; after mixing evenly, slowly add the mixed water reducer and water, Fully stir for 3 minutes;

[0047] Step 3: After testing, the 28d compressive strength of coal gangue full aggregate concrete reaches 53.81MPa.

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Abstract

The invention discloses coal gangue all-aggregate concrete and a preparation method thereof. The coal gangue all-aggregate concrete is prepared from the following raw materials in parts by mass: 250-500 parts of cement, 600-700 parts of coal gangue fine aggregate, 1050-1250 parts of coal gangue coarse aggregate, 1-3 parts of an additional water reducing agent and 190 parts of water, sequentially adding the coal gangue coarse aggregate, the coal gangue fine aggregate and the cement into a stirrer, and uniformly mixing and stirring for 5-10 minutes; and fully mixing the external water reducing agent with water to form a mixed solution, adding the mixed solution into a stirrer, and fully stirring the mixed solution with the cement and coal gangue all-aggregate.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a coal gangue full aggregate concrete and a preparation method thereof. Background technique [0002] my country is a country with rich coal resources, and a large amount of solid waste—coal gangue will be produced in the process of coal mining, tunneling and washing. According to statistics, there are more than 2,600 piles of coal gangue stacked in the open air, most of which are located in mining areas, covering an area of ​​about 13,000 hectares. This not only exacerbates the shortage of land resources, but also causes water, soil and air pollution through the physical and chemical effects of gangue dumps, which will gradually deteriorate the environment of the mining area. Structural erosion, instability, debris flow and other disasters will also occur. In order to reduce the occupation of coal gangue on land resources and the impact on the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/00C04B18/12
CPCC04B28/04C04B20/0096C04B2111/00017C04B18/12C04B2103/302C04B22/002Y02W30/91
Inventor 夏军武郁林利徐恩来王玉婧张宇航
Owner CHINA UNIV OF MINING & TECH
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