High-strength impermeable anti-freezing concrete and preparation method thereof

Abstract

The invention discloses high-strength impermeable anti-freezing concrete and a preparation method thereof. The high-strength impermeable anti-freezing concrete is prepared from the following raw materials: cement, water, sand, stones, fly ash, an anti-freezing agent, a rust-inhibiting anti-corrosion waterproof agent, waste concrete particles and waste rubber particles. The anti-freezing agent is prepared from the following components in parts by weight: 3.4 to 6.8 parts of modified coal gangue; 1.2 to 2.0 parts of rice hull ash, 1.5 to 3 parts of vinyl acetate-ethylene copolymer latex powder;0.8 to 1.6 parts of silicon powder; 2.4 to 3.8 parts of polypropylene reticular fiber; 0.8 to 1.6 parts of seaweed extract; 0.9 to 1.8 parts of urea; 1.4 to 2.2 parts of calcium nitrite and 10 to 20 parts of water. The high-strength impermeable anti-freezing concrete has the advantages of effective utilization of waste materials, strong freeze-thaw resistance and mechanical properties, reduction of freeze-thaw diseases of concrete in cold regions, and purification of automobile exhaust.

Description

technical field [0001] The invention relates to the technical field of building materials, more specifically, it relates to a high-strength anti-seepage and anti-freeze concrete and a preparation method thereof. Background technique [0002] Freeze-thaw damage is a common disease in concrete structure engineering in cold areas, especially in coastal areas, where the wind is strong and the temperature is low, and the concrete structures that are often in contact with water suffer from different degrees of freeze-thaw damage locally or in large areas, which will accelerate The performance degradation of concrete structures seriously affects the safety and durability of concrete structures and causes huge economic losses. Therefore, it is very necessary to study the causes and influencing factors of concrete freeze-thaw damage and improve the durability of concrete in freeze-thaw environments. Concrete freeze-thaw damage is a form of damage under freezing, mainly manifested as ...

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Problems solved by technology

[0003] At present, there are two main measures to improve the frost resistance of concrete: one is to lower the freezing point of water by adding some salts into the admixture, and the other is to alleviate the freezing point of water caused by the solid-liquid phase transition through air-entraining agents. Ice expansion stress, both of these two measures have certain limitations. The freezing point depression of salt on water is not large, and generally can only be maintained at a few degrees below zero without freezing, and the addition of air-entraining agent increases the air content It will bring about a decrease in strength. The greater the air content, the lower the concrete compressive strength. For every 1% increase in air content, the strength will decrease by 3-5%. Therefore, a trade-off between strength and durability is required.

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