A kind of anti-crack and anti-corrosion marine concrete prepared by using machine-made sand with high stone powder content

Abstract

The invention discloses an anti-crack and corrosion-resisting marine concrete prepared from machine-made sand with high stone powder content. The anti-crack and corrosion-resisting marine concrete prepared from the machine-made sand with the high stone powder content is prepared from cement, silica fume, coal ash beads, gravel, the machine-made sand, steel-imitating fiber, water reducing agent, erosive ion inhibitor, internal curing and shrinkage reducing functional materials and water. The anti-crack and corrosion-resisting marine concrete prepared from the machine-made sand with the high stone powder content replaces river sand by the machine-made sand with the high stone powder content and makes use of the balling, condense filling and water reducing effects of the coal ash beads to regulate the mixability and the microstructures, by means of the erosive ion inhibitor, ensures good corrosion-resisting capability from the aspects of filling capillary pores, forming hydrophobic layers and consuming concrete internal erosive ions, and through the internal curing and shrinkage reducing functional materials as well as the steel-imitating fiber, improves the anti-crack performance and the size stability. The obtained anti-crack and corrosion-resisting marine concrete is high in working performance, mechanical performance and anti-crack, anti-permeating and anti-corrosion performance, low in control requirements on content of stone powder in the machine-made sand and significant in practical application values.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a crack-resistant and corrosion-resistant marine concrete prepared by utilizing machine-made sand with high stone powder content and a preparation method thereof. Background technique [0002] At present, my country is vigorously developing marine resources, and a large number of marine engineering buildings and projects are being used and constructed. However, natural river sand resources in subtropical and tropical marine areas such as Guangdong and Hainan in my country are scarce, and excessive development will cause unrecoverable consequences for local rivers and other ecological environments. Using machine-made sand instead of river sand can make full use of local resources and is in line with the country's long-term development strategy layout. However, during the production process of machine-made sand, a large amount of stone powder (particle size ≤ 0.75 μm) ...

AI Technical Summary

Problems solved by technology

At present, the types of preservatives used to prevent concrete erosion and damage are mainly external spraying and internal mixing. External spraying preservatives are prone to aging and falling off in places with high humidity and osmotic pressure, and their durability is short; while internal preservatives Mainly start from the two aspects of blocking the capillary pores in the concrete or forming a hydrophobic layer, the effect is single, and the damage of the internal sulfate to the concrete is ignored, so the anti-corrosion effect of the concrete is not obvious, and the service life is short

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