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Fibre-polymer compound toughened concrete and preparation method for same

A polymer and concrete technology, which is applied in the field of fiber and polymer composite toughened concrete and its preparation, can solve the problems of poor anti-aging performance of polymers, and achieve the effect of optimizing the maintenance system and optimizing the construction process

Inactive Publication Date: 2013-04-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary concrete is a quasi-brittle material. Adding suitable fibers can improve the tensile strength, flexural strength and fracture performance of concrete, but there is an interface transition zone between the fiber and the cementitious material matrix, which is the weak zone of the composite material; Appropriate and appropriate polymers can optimize the performance of the interfacial transition zone, but have little effect on improving the compressive strength, and the polymers in concrete face the problem of poor long-term anti-aging performance

Method used

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  • Fibre-polymer compound toughened concrete and preparation method for same
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  • Fibre-polymer compound toughened concrete and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]1. Preparation method:

[0049] 1) Pour gravel, sand, cement, and fly ash into the mixer, and stir evenly for 30 seconds;

[0050] 2) Disperse the fiber, and then slowly sprinkle the fiber with a volume content of 0.08% into the working mixer. After the fiber is completely sprinkled, mix it with the dry material for 30 seconds (the time can be adjusted according to the speed of the fiber) (single mixing omit this step for polymers);

[0051] 3) Pour the polycarboxylate high-efficiency water reducer into the water, start the mixer, pour the water evenly into the working mixer, and stir for 3 minutes;

[0052] 4) Pour the polymer with an amount of 10% of the total mass of the cementitious material (Portland cement + fly ash) into the working mixer evenly, and stir for 3 minutes, (ignore this step when only mixing fibers);

[0053] 5) After the mixing is completed, turn off the power, pour out the freshly mixed concrete, and pour it into the steel mold. The numbers of eac...

Embodiment 2

[0069] 1. Preparation method:

[0070] 1) Pour gravel, sand, cement, and fly ash into the mixer, and stir evenly for 30 seconds;

[0071] 2) Disperse the fiber, and then slowly sprinkle the fiber with a volume content of 0.08% into the working mixer. After the fiber is completely sprinkled, mix it with the dry material for 30 seconds (the time can be adjusted according to the speed of the fiber) (single mixing omit this step for polymers);

[0072] 3) Pour the polycarboxylate high-efficiency water reducer into the water, start the mixer, pour the water evenly into the working mixer, and stir for 3 minutes;

[0073] 4) Pour the polymer with an amount of 10% of the total mass of the cementitious material (Portland cement + fly ash) into the working mixer evenly, and stir for 3 minutes, (ignore this step when only mixing fibers);

[0074] 5) After the mixing is completed, turn off the power, pour out the freshly mixed concrete, and pour it into the steel mold.

[0075] 2. Main...

Embodiment 3

[0085] 1. Preparation method:

[0086] 1) Pour gravel, sand, cement, and fly ash into the mixer, and stir evenly for 30 seconds;

[0087] 2) Disperse the fiber, and then slowly sprinkle the fiber with a volume content of 0.08% into the working mixer. After the fiber is completely sprinkled, mix it with the dry material for 30 seconds (the time can be adjusted according to the speed of the fiber) (single mixing omit this step for polymers);

[0088] 3) Pour the polycarboxylate high-efficiency water reducer into the water, start the mixer, pour the water evenly into the working mixer, and stir for 3 minutes;

[0089] 4) Pour the polymer with an amount of 10% of the total mass of the cementitious material (Portland cement + fly ash) into the working mixer evenly, and stir for 3 minutes, (ignore this step when only mixing fibers);

[0090] 5) After the mixing is completed, turn off the power, pour out the freshly mixed concrete, and pour it into the steel mold.

[0091] 2. Main...

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Abstract

The invention discloses a fibre-polymer compound toughened concrete and a preparation method for the same. The basic raw materials of the concrete are coarse aggregate, fine aggregate, portland cement, fly ash and a polycarboxylic water reducer; moreover, fibres and a polymer are added, the fibres are any one of end-hook type steel fibres, superfine type steel fibres, modified polyester fibres, polyvinyl alcohol fibres, basalt fibres and cellulose fibres, and are doped in a ratio that the volume doped amount in per 1 m<3> concrete is 0.08%; and the polymer is any one of ethylene-vinyl acetate copolymer, ethyl acrylate, styrene-acrylate copolymer, vinyl acetate-acrylate copolymer and organosilicone acrylate, and the doped amount of each polymer is 10% based on the mass of the portland cement and the fly ash. The preparation method comprises the following steps of: pouring stone, sand, a gelling material, fibres, and water dissolved with a water reducer, and then stirring according to a blending mode of pouring dry materials at first and then pouring wet materials; and pouring the polymer, and stirring and forming.

Description

technical field [0001] The patent of the present invention relates to a raw material optimization principle and preparation method of fiber and polymer composite toughened concrete. Background technique [0002] High strength, high toughness, high crack resistance and high durability are the development trend of concrete material performance requirements in the field of civil engineering, and also meet the requirements of large-scale construction projects for material crack resistance and durability. Ordinary concrete is a quasi-brittle material. Adding suitable fibers can improve the tensile strength, flexural strength and fracture performance of concrete, but there is an interface transition zone between the fiber and the cementitious material matrix, which is the weak zone of the composite material; An appropriate amount of polymer can optimize the performance of the interfacial transition zone, but it has little effect on improving the compressive strength, and the polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B16/06C04B14/48C04B24/26C04B24/42
Inventor 郭丽萍孙伟曹擎宇张丽辉张文潇陈波
Owner SOUTHEAST UNIV
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