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Crack-resistant concrete mix and mixing method thereof

A concrete and admixture technology, applied in chemical instruments and methods, cement mixing devices, clay preparation devices, etc., can solve the problems of high cost of impermeable concrete, reduce engineering construction costs, improve cohesiveness, Addressing the effects of strength and impermeability

Inactive Publication Date: 2017-07-04
TIANJIN ZEYUAN CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the coarse sand is transported from other regions, the cost of impermeable concrete will remain high

Method used

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  • Crack-resistant concrete mix and mixing method thereof
  • Crack-resistant concrete mix and mixing method thereof
  • Crack-resistant concrete mix and mixing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of anti-cracking concrete mixture, each cubic meter of raw material contains:

[0021]

[0022] The fineness modulus of fine sand is 1-2mm. The fineness modulus of medium and coarse sand is 4-5mm. The particle size of the stone is 5-25mm. Portland cement is P·O42.5 Portland cement. The mineral powder is S95 grade mineral powder. The length of polypropylene mesh fibers is 15-20mm.

[0023] The mixing method of the above-mentioned anti-cracking concrete mixture is to add stones, fly ash, mineral powder, polypropylene mesh fiber, coarse sand and fine sand successively while stirring, and stir for 2 minutes to make the polypropylene mesh fiber fully Open it, then add Portland cement, water, air-entraining superplasticizer, anti-cracking agent and pumping agent, and stir evenly. Show through many experiments and studies, adopt the C30 / P6 impervious concrete of the present invention's preparation, 7d compressive strength is 22.7Mpa, 28d compressive strength is ...

Embodiment 2

[0025]

[0026]

[0027] The fineness modulus of fine sand is 1-2mm. The fineness modulus of medium and coarse sand is 4-5mm. The particle size of the stone is 5-25mm. Portland cement is P·O42.5 Portland cement. The mineral powder is S95 grade mineral powder. The length of polypropylene mesh fibers is 15-20mm.

[0028] The mixing method of the above-mentioned anti-cracking concrete mixture is to put in stones, fly ash, polypropylene mesh fiber, coarse sand and fine sand successively while stirring, and stir for 2 minutes to fully open the polypropylene mesh fiber, silicon Salt cement, water, air-entraining superplasticizer, anti-cracking agent and pumping agent, just stir evenly. Show through many tests and studies, adopt the C30 / P6 impervious concrete of the present invention's preparation, 7d compressive strength is 21.5Mpa, 28d compressive strength is 31.5Mpa, its strength and impermeability, durability, abrasion resistance, Various properties such as drying shri...

Embodiment 3

[0030] A kind of anti-cracking concrete mixture, each cubic meter of raw material contains:

[0031]

[0032]

[0033] The fineness modulus of fine sand is 1-2mm. The fineness modulus of medium and coarse sand is 4-5mm. The particle size of the stone is 5-25mm. Portland cement is P·O42.5 Portland cement. The mineral powder is S95 grade mineral powder. The length of polypropylene mesh fibers is 15-20mm.

[0034] The mixing method of the above-mentioned anti-cracking concrete mixture is to put in stones, fly ash, polypropylene mesh fiber, coarse sand and fine sand successively while stirring, and stir for 2 minutes to fully open the polypropylene mesh fiber, silicon Salt cement, water, air-entraining superplasticizer, anti-cracking agent and pumping agent, just stir evenly. Show through many experiments and studies, adopt the C30 / P6 impervious concrete of the present invention's preparation, 7d compressive strength is 23.3Mpa, 28d compressive strength is 34.8Mpa, its ...

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Abstract

The invention relates to a crack-resistant concrete mix. The concrete mix comprises, by weight, 286 to 290 parts of Portland cement, 430 to 450 parts of fine sand, 250 to 270 parts of medium coarse sand, 1070 to 1080 parts of cobblestone, 28 to 32 parts of fly ash, 58 to 62 parts of mineral powder, 130 to 135 parts of water, 7.6 to 7.9 parts of a pumping agent, 0.9 to 1.8 parts of polypropylene reticular fibers, 24 to 26 parts of an air-entraining and water-reducing agent, and 4.5 to 5 parts of a crack-resistant agent. According to the invention, aggregate grading is optimized, a sand rate and a water-cement ratio are controlled, and the superfine polypropylene reticular fibers are added, so organic combination of the superfine polypropylene reticular fibers with the fine sand is realized, bonding between the fine sand and other ingredients is improved, the problem of reduction in strength, impermeability, durability, crack resistance and workability during preparation of concrete from ultrafine sand is effectively overcome, and cost for engineering construction is substantially reduced; meanwhile, the air-entraining and water-reducing agent and the crack-resistant agent are used so as to improve the crack resistance and freezing-and-thawing resistance of concrete.

Description

technical field [0001] The invention relates to a building material, in particular to a crack-resistant concrete mixing material and a mixing method thereof. Background technique [0002] Concrete generally refers to the artificial stone made of cement as the main cementitious material, mixed with water, sand, stones, chemical admixtures and mineral admixtures when necessary, mixed in an appropriate proportion, uniformly stirred, densely formed and cured . As a building material with a large amount and a wide range of use in the world, concrete has been widely developed in various countries and regions for its good mechanical properties, economy and adaptability to the environment. put forward higher requirements. As the most commonly used structural form in the field of civil engineering, concrete structures have extremely complex construction and service environments. The durability of concrete in harsh environments is particularly prominent, and has become a research ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B16/06B28C5/40C04B111/34
CPCC04B28/04B28C5/402C04B16/0633C04B2111/343C04B2201/50
Inventor 吕宝旺
Owner TIANJIN ZEYUAN CONCRETE CO LTD
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