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Machine-made sand modified self-compacting concrete and preparation method thereof
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A technology of self-compacting concrete and machine-made sand, applied in the field of concrete, can solve the problems of low concrete strength, poor concrete compactness, and high roughness of machine-made sand, and achieve the effect of high roughness and excellent performance
Inactive Publication Date: 2022-05-13
江苏昆腾新材料科技有限公司
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Problems solved by technology
Machine-made sand is obtained by crushing and pulverizing stone materials. Compared with traditional river sand, the cost is greatly reduced. However, the machine-made sand has high roughness, irregular shape, and poor compactness of the proportioned concrete, resulting in low concrete strength.
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Embodiment 1
[0024] This embodiment provides a machine-made sand modified self-compacting concrete, comprising the following components in parts by weight: 200-300 parts of coarse aggregate, 500-700 parts of machine-made sand, 250-320 parts of cement, 200-300 parts of water, 30-50 parts of fly ash, 35-55 parts of mineral powder, 10-20 parts of water reducing agent, and 12-18 parts of compacting enhancer.
[0025] In this embodiment, the following components by weight are included: 250 parts of coarse aggregate, 600 parts of machine-made sand, 280 parts of cement, 250 parts of water, 40 parts of fly ash, 42 parts of mineral powder, 15 parts of water reducer, compact Enhancer 15 parts.
[0026] In this embodiment, the machine-made sand is modified, and the treatment process is as follows:
[0027] S1: Add machine-made sand into the ball mill and grind until the fineness modulus is 2.3-2.8;
[0028] S2: Soak the ground machine-made sand in water and dry it;
[0029] S3: carry out hydroxyla...
Embodiment 2
[0043] This embodiment provides a kind of machine-made sand modified self-compacting concrete, comprising the following components by weight: 200 parts of coarse aggregate, 500 parts of machine-made sand, 250 parts of cement, 200 parts of water, 30 parts of fly ash, mineral powder 35 parts, 10 parts of water reducer, 12 parts of compact enhancer.
Embodiment 3
[0045] This embodiment provides a kind of machine-made sand modified self-compacting concrete, comprising the following components by weight: 300 parts of coarse aggregate, 700 parts of machine-made sand, 320 parts of cement, 300 parts of water, 50 parts of fly ash, mineral powder 55 parts, 20 parts of water reducer, 18 parts of compact enhancer.
[0046] To the concrete of embodiment 1, embodiment 2 and embodiment 3, carry out performance test, test result is as table 1:
[0047]
[0048] It can be seen from the above table that the concretes of Example 1, Example 2 and Example 3 fully reached the strength of river sand concrete in the slump spread test and compressive strength test, and the cohesion is good, which meets the use standard .
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Abstract
The machine-made sand modified self-compacting concrete is prepared from the following components in parts by weight: 200 to 300 parts of coarse aggregate, 500 to 700 parts of machine-made sand, 250 to 320 parts of cement, 200 to 300 parts of water, 30 to 50 parts of fly ash, 35 to 55 parts of mineral powder, 10 to 20 parts of water reducing agent and 12 to 18 parts of compacting enhancer. According to the invention, the machine-made sand is adopted as a concrete raw material, and the machine-made sand is modified by considering that the machine-made sand is higher in roughness and irregular in shape compared with river sand, and the compact reinforcing agent is matched and matched with the preparation method, so that the concrete adopting the machine-made sand raw material also has excellent performance.
Description
technical field [0001] The invention relates to the field of concrete, in particular to machine-made sand modified self-compacting concrete and a preparation method thereof. Background technique [0002] Machine-made sand refers to sand processed by sand making machines and other auxiliary equipment. The finished product is more regular and can be processed into sand of different rules and sizes according to different process requirements, which can better meet daily needs. Machine-made sand is obtained by crushing and pulverizing stone materials. Compared with traditional river sand, the cost is greatly reduced. However, the machine-made sand has high roughness, irregular shape, and poor compactness of the proportioned concrete, resulting in low concrete strength. Contents of the invention [0003] Purpose of the invention: The technical problem to be solved by the present invention is to provide a kind of machine-made sand modified self-compacting concrete and its prepar...
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Application Information
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