Concrete and preparation technology thereof

Abstract

The invention discloses concrete and a preparation technology thereof. The concrete comprises, by weight, 290-345 parts of cement, 870-945 parts of sand, 750-900 parts of stones, 80-105 parts of fly ash, 56-88 parts of slag, 1-3 parts of polycarboxylate-type water reducing agent, 0.5-2 parts of expanding agent, 0.8-1.5 parts of addictive, 3-8 parts of fiber mixtures, 1-2 parts of defoaming agent and 145-170 parts of water. The cement is P.O 42.5 cement, the additive comprises MCC, xanthan gum and polyvinylpyrrolidone, the fiber mixtures comprise at least two kinds of glass fiber, steel fiber and carbon fiber, and the defoaming agent comprises at least one kind of polysiloxane and polyether modified polysiloxane. The concrete and the preparation technology have the advantages that the air content is lowered, and the impervious performance and the crack resistance of the solidified concrete are improved.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, more specifically, it relates to a concrete and its preparation process. Background technique [0002] Concrete is one of the most important civil engineering materials in contemporary times and is widely used in all aspects of construction. However, due to the widespread shrinkage of concrete (especially mass concrete and high-strength concrete, etc.), the performance of concrete cracking, strength, anti-seepage, and corrosion resistance is reduced. However, the obvious disadvantages of using expansion agents as shrinkage-compensating concrete materials in the market are: the heat of hydration of concrete is high, the shrinkage and deformation of concrete are large, and phenomena such as cracking and leakage of concrete are common. Therefore, a concrete with better impermeability and crack resistance has better commercial prospects. Contents of the invention [0003] In view of ...

AI Technical Summary

Problems solved by technology

However, due to the widespread shrinkage of concrete (especially large-volume concrete and high-strength concrete, etc.), the performance of concrete cracking, strength, anti-seepage, and corrosion resistance is reduced.

However, the obvious defects of using expansion agents as shrinkage-compensating concrete materials in the market are: the heat of hydration of concrete is high, the shrinkage and deformation of concrete are large, and concrete cracking and leakage are common.

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