A kind of anti-seepage and anti-freezing and thawing self-compacting concrete and its preparation method

Abstract

The invention discloses an anti-seepage anti-freezing and thawing self-compacting concrete and a preparation method thereof. The anti-seepage and anti-freezing and thawing self-compacting concrete includes the following components by weight: 350-370 parts of cement, 25-45 parts of fly ash, 25-35 parts of modified metakaolin, 30-50 parts of mineral powder, 770-800 parts Medium sand, 810-830 parts of gravel, 20-40 parts of silica fume, 170-180 parts of water, 1-3 parts of water reducing agent, 20-34 parts of expansion agent, 2-6 parts of air-entraining agent, 10-20 parts Fiber composition; the fiber composition is composed of modified polyester fiber, basalt fiber and polyacrylonitrile fiber with a mass ratio of 1:0.6-0.9:0.3-0.6. The anti-seepage and anti-freeze-thaw self-compacting concrete of the invention has the advantages of good workability and fluidity, and excellent anti-seepage performance and antifreeze performance.

Description

technical field [0001] The invention relates to the technical field of concrete, and more specifically relates to an anti-seepage and anti-freezing and thawing self-compacting concrete and a preparation method thereof. Background technique [0002] Concrete is an indispensable and important engineering material in modern civil engineering. And self-compacting concrete is a kind of high-performance concrete. Its mixture has high fluidity without segregation and bleeding, and can level itself without vibration, and is filled with models and wrapped steel bars; its slump The time loss is small. Due to the low cement consumption of self-compacting concrete, the high utilization rate of waste slag and good construction performance, it can save waste, manpower and material resources, speed up the construction progress, reduce the overall cost of concrete, and solve the problem of disturbing people when pouring concrete, especially for difficult-to-use concrete. Pouring, even par...

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Problems solved by technology

[0004] Although the existing self-compacting concrete reduces the consumption of cement and cementitious materials, comprehensively utilizes waste, reduces the processing cost of concrete, and the added aliphatic (hydroxyl) sulfonate high-efficiency water reducer increases the concrete's strength. Antifreeze, but the aliphatic (hydroxyl) sulfonate high-efficiency superplasticizer can only be used as an antifreeze at a fixed temperature of -5°C. When the concrete prepared in this case is in an environment less than -5°C, the antifreeze-thaw effect Not good, makes concrete prone to cracks and fine lines

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