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

A cement concrete and anti-cracking technology, which is applied in the field of building materials, can solve the problems of concrete durability decline, concrete cracking, and low tensile strength, and achieve the effects of increasing strength, improving toughness, and improving flexibility

Inactive Publication Date: 2018-04-20
NANTONG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment 1

[0051] The high-toughness and anti-cracking cement concrete provided by the embodiment of the present invention has the mass ratio of raw materials as 3% of hydroxyethyl cellulose, 0.2% of cellulose ether, 4% of FRP fiber, 3% of PP polypropylene fiber, and 0.2% of pH-sensitive hydrogel ~0.8%, cement 20%, aggregate 45%, redispersible rubber powder 1%~2%, cellulose ether modified additive 0.5%~1%, water reducer 1%, coagulation regulator 0.1%, waste Glass 5% and fly ash 10%. Strength can reach Cc80.

Embodiment 2

[0053] The high-toughness anti-cracking cement concrete provided by the embodiments of the present invention has the mass ratio of raw materials as 8% of hydroxyethyl cellulose, 0.8% of cellulose ether, 4%-6% of FRP fiber, 3%-5% of PP polypropylene fiber, pH Sensitive hydrogel 0.8%, cement 25%, aggregate 55%, redispersible rubber powder 1%~2%, cellulose ether modified additive 0.5%~1%, water reducing agent 1%~2%, adjusting 0.1% to 0.2% coagulant, 5% to 10% waste glass and 115% fly ash. Strength can reach Cc85.

Embodiment 3

[0055] The high-toughness and anti-cracking cement concrete provided by the embodiments of the present invention has the mass ratio of raw materials as 5% of hydroxyethyl cellulose, 0.5% of cellulose ether, 5% of FRP fiber, 3% to 5% of PP polypropylene fiber, and pH-sensitive hydraulic coagulation Glue 0.2%~0.8%, cement 22%, aggregate 50%, redispersible rubber powder 1%~2%, cellulose ether modified additive 0.5%~1%, water reducing agent 1%~2%, adjusting 0.1% to 0.2% coagulant, 5% to 10% waste glass and 12% fly ash. Strength can reach Cc82.

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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...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B111/34
CPCC04B28/00C04B2111/343C04B2201/50C04B24/383C04B20/0048C04B16/0633C04B18/022C04B14/00C04B2103/0057C04B2103/0068C04B24/24C04B22/0013C04B18/16C04B18/08
Inventor 吴旭戴丽谢巍杨峰
Owner NANTONG INST OF TECH
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