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Anti-crack concrete and preparation method thereof

A technology of concrete and mixture, applied in the field of concrete, can solve the problems of reducing the heat of hydration, reducing the tensile strength and compressive strength of concrete, etc., to achieve the effect of improving the bearing capacity, avoiding the shrinkage deformation, and improving the tensile strength

Inactive Publication Date: 2020-06-23
上海石化安东混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fly ash and mineral powder replace the same amount of cement, which reduces the tensile strength and compressive strength of concrete while reducing the heat of hydration.

Method used

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  • Anti-crack concrete and preparation method thereof
  • Anti-crack concrete and preparation method thereof
  • Anti-crack concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1: A kind of anti-cracking concrete, each component and its corresponding parts by weight are shown in Table 1, and are prepared through the following steps:

[0053] S1, uniformly mix fly ash, mineral powder, sand and fine stones in corresponding parts by weight to obtain mixture A;

[0054] S2, uniformly mixing cement, reinforcing fibers, superabsorbent resin balls and elastic rubber particles in corresponding parts by weight to obtain a mixture B;

[0055] S3, dissolving the water reducing agent into water to obtain a mixture C;

[0056] S4, mix mixture A and mixture B uniformly, add mixture C and stir and mix uniformly to prepare crack-resistant concrete.

[0057] The particle size of the superabsorbent resin ball is 1mm, the particle size of the elastic rubber particle is 3mm, and the reinforcing fiber is steel fiber.

Embodiment 2-6

[0058]Embodiment 2-6: A crack-resistant concrete, the difference from Embodiment 1 is that each component and its corresponding parts by weight are shown in Table 1.

[0059] Each component and parts by weight thereof in table 1 embodiment 1-6

[0060]

[0061]

Embodiment 7

[0062] Example 7: A crack-resistant concrete, the difference from Example 1 is that steel fibers and nylon fibers are used as reinforcing fibers, and the dosage ratio is 1:1 in parts by weight.

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Abstract

The invention discloses anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. The anti-crack concrete is characterized by comprising the following components in parts by weight: 200-250 parts of cement, 100-120 parts of fly ash, 40-45 parts of mineral powder; 750-800 parts of sand; 1000-1050 parts of fine stone; 1-3 parts of a water reducing agent; 150-175 parts of water; 10-50 parts of reinforcing fibers; 10-15 parts of super absorbent resin balls and 20-25 parts of elastic rubber particles. The anti-crack concrete prepared by adopting the formula has the advantages of high strength and high crack resistance.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to a crack-resistant concrete and a preparation method thereof. Background technique [0002] In today's infrastructure construction, such as high-rise buildings, bridge construction, highways, marine engineering, high-speed rails, iron grids in big cities, etc., the most used building materials are concrete. Especially for super-long walls (length > 10m) or thick walls (thickness > 500mm), they belong to mass concrete, and the hydration of cement and admixtures in early concrete pouring produces and releases a large amount of heat, making it The internal temperature rises and the concrete expands due to heat. When the hydration of cement and admixtures is basically completed, the concrete begins to cool down and shrink, but the structure is constrained to generate tensile stress. When the stress is greater than the tensile strength of concrete, temperature c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/34C04B111/50
CPCC04B28/04C04B2111/343C04B2111/503C04B2201/50C04B18/08C04B18/141C04B14/06C04B14/02C04B14/48C04B24/00C04B18/22C04B24/04
Inventor 顾连林张耀赵凤秀
Owner 上海石化安东混凝土有限公司
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