High-toughness anti-cracking cement concrete and preparation method thereof

Abstract

The invention belongs to the technical field of building materials, and discloses high-toughness anti-cracking cement concrete and a preparation method of the high-toughness anti-cracking cement concrete. The high-toughness anti-cracking cement concrete comprises the following raw materials in a mass ratio: 3% to 8% of hydroxyethyl cellulose, 0.2% to 0.8% of cellulose ether, 4% to 6% of FRP fiber,3% to 5% of PP fiber, 0.2% to 0.8% of pH sensitive hydrogel, 20% to 25% of cement, 45% to 55% of aggregate, 1% to 2% of redispersible rubber powder, 0.5% to 1% of a cellulose ether modified additive,1% to 2% of a water reducer, 0.1% to 0.2% of an adjustable solidification agent, 5% to 10% of waste glass and 10% to 15% of fly ash. According to the invention, the FRP fiber is a high-strength material to improve the strength of cement concrete, and the PP fiber is a high-toughness material to improve the toughness of the cement concrete, and effectively prevent the drying shrinkage and crackingof the concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-toughness anti-cracking cement concrete and a preparation method thereof. Background technique [0002] At present, cement concrete is the main material of my country's national economic construction. With the increasing application range of concrete, its performance degradation in the natural environment is gradually exposed. Ordinary cement concrete has high compressive strength and high stiffness, but it has the characteristics of shrinkage cracking, low tensile strength and poor toughness during the setting and hardening process, and its brittleness becomes more obvious with the increase of strength. It has a great impact on the durability of concrete structures. When cement concrete is placed in unsaturated air, the internal capillary pores and gel pores lose absorbed water and undergo irreversible shrinkage, which will cause cracking of the c...

AI Technical Summary

Problems solved by technology

[0005] In summary, the existing problems in the prior art are: cement concrete is prone to shrinkage cracking and low tensile strength during the setting and hardening process; The irreversible shrinkage caused by the adsorption of water will cause the cracking of the concrete, which will lead to the decline of the durability of the concrete.

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