Abrasion-resistant and corrosion-resistant concrete and preparation method thereof

Abstract

The invention relates to the field of building materials, and particularly discloses abrasion-resistant and corrosion-resistant concrete and a preparation method thereof. The abrasion-resistant and corrosion-resistant concrete comprises the following components: cement, fly ash, slag powder, an expanding agent, fine aggregate, coarse aggregate, water, an additive and modified quartzite. The preparation method of the modified quartzite comprises the following steps: crushing quartzite, mixing the crushed quartzite with an acid solution, and conducting washing and roasting to obtain porous quartzite; atomizing and depositing an wear-resistant and corrosion-resistant additive on the porous quartzite to obtain quartzite particles; and (3) mixing carbide slag and the quartzite particles, and keeping the temperature at 950-1000 DEG C for 2-3 hours to obtain modified quartzite. The wear-resistant and corrosion-resistant additive is prepared from the following components: coal gangue, composite fibers, rice hull ash, a silane coupling agent KH-550 and a water repellent agent. The abrasion-resistant and corrosion-resistant concrete has the advantages of being good in sea wave and sediment abrasion resistance and chloride ion erosion resistance, high in impermeability and excellent in durability when being used for ocean engineering infrastructure construction.

Description

technical field [0001] The present application relates to the technical field of building materials, and more specifically, it relates to an abrasion-resistant and corrosion-resistant concrete and a preparation method thereof. Background technique [0002] The 21st century is the century of the ocean. my country's marine industry is developing rapidly, and the blue economy is full of vitality. It is gradually becoming a new growth point of my country's economy. During the development and construction of the blue economy, a large number of marine engineering infrastructures have begun to be built, such as ports. For docks, cross-sea bridges, offshore oil platforms, etc., steel and reinforced concrete are the two most commonly used materials. [0003] Under the condition of alternating dry and wet conditions, the infrastructure of marine engineering is severely eroded by chloride salts. The infiltration of chloride salts has a strong corrosive effect on the steel bars in reinfo...

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Problems solved by technology

[0003] Under the condition of alternating dry and wet conditions, the infrastructure of marine engineering is severely eroded by chloride salts. The infiltration of chloride salts has a strong corrosive effect on the steel bars in reinforced concrete, which causes steel bar corrosion, resulting in concrete swelling and spalling, structural damage, and endangering the safety of buildings. Normal operation, especially the bridges on both sides of the cross-sea bridge or the bridge in the tidal zone, because the coast is shallow, it is easy to be hit by the waves, and the waves carry a lot of mud and sand. Under the influence of climate, the mud and sand carried by the sea will affect the bridge box The beams cause scouring, slapping, wear and other destructive effects, so that the bridge structure is not only eroded by corrosive ions in seawater, but also eroded by sediment in seawater, resulting in poor durability of the bridge structure

[0004] In the marine environment, concrete with a large amount of mineral admixtures (such as fly ash, mineral powder) and the like has good resistance to chlorine salt erosion and cracking, but there are still insufficient concrete surface hardness and erosion resistance. Poor ability and other issues

[0005] In view of the related technologies mentioned above, the inventor believes that the concrete used in the construction of marine engineering infrastructure has poor resistance to sea waves, sand erosion, and chloride ion erosion, and its durability needs to be improved.

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