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Expansive anti-crack fiber concrete and preparation method thereof

A technology of anti-crack fiber and concrete, applied in the direction of fiber treatment, fiber type, fiber chemical characteristics, etc., can solve the problems that concrete cannot have repair ability, long time, etc., to shorten the healing time, the preparation method is simple, and the brittleness is large. Effect

Inactive Publication Date: 2021-04-09
青岛光大集团工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned related technologies, the inventor believes that when repairing internal cracks in concrete through the hydration reaction between unhydrated gel particles and water, it takes a long time to form sufficient strength due to cement hydration, and the concrete cannot be repaired in a short time. ability

Method used

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  • Expansive anti-crack fiber concrete and preparation method thereof
  • Expansive anti-crack fiber concrete and preparation method thereof
  • Expansive anti-crack fiber concrete and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1-10

[0038] In Preparation Example 1-10, o-cresol novolac epoxy resin was selected from Changsha Fudakang Chemical Materials Co., Ltd., the model was CYDCN-200; the α-cyanoacrylate adhesive was selected from Shanghai Hezhiqin Intelligent Technology Co., Ltd., and the model was HZ701; Epoxy resin adhesive is selected from Jinan Yisheng Resin Co., Ltd., the model is E-128; polyphenylene sulfide fiber is selected from Tai’an Jiacheng Fiber Co., Ltd., the product number is T436; sorbitan monostearate, octyl The base phenol polyoxyethylene ether is selected from Jiangsu Maoheng Chemical Co., Ltd., the model is OP-40; the EEA particles are selected from the plastic raw material management department of Jinyunlai, Zhangmutou, Dongguan City, and the brand is 4700; the polyphenylene sulfide particles are selected from Shanghai Plastic Hair Plastic Co., Ltd., the model is P2020A; methyl methacrylate is selected from Jinan Huasheng Chemical Co., Ltd., the model is 2-2.

preparation example 1

[0039] Preparation Example 1: Dissolve 2kg o-cresol novolac epoxy resin with dimethylformamide solution, add 0.5kgα-cyanoacrylate adhesive, 0.25kg epoxy resin adhesive and 1kg polyphenylene sulfide fiber to o-cresol novolac epoxy resin Add an emulsifier to the resin, ultrasonically disperse for 20 minutes, and spray dry to obtain fiber capsules. The spray pressure is 0.5 MPa, and the drying temperature is 160°C. The preparation of o-cresol novolac epoxy resin, dimethylformamide solution and emulsifier An example is 1:0.4:0.05, and the emulsifier is made by mixing octylphenol polyoxyethylene ether and sorbitan monostearate in a mass ratio of 1:0.5.

preparation example 2

[0040] Preparation example 2: Dissolve 2.5kg o-cresol novolac epoxy resin with dimethylformamide solution, add 0.6kgα-cyanoacrylate adhesive, 0.28kg epoxy resin adhesive and 1.5kg polyphenylene sulfide fiber to o-cresol novolac Add an emulsifier to the epoxy resin, ultrasonically disperse for 25 minutes, and spray dry to obtain fiber capsules. The spray pressure is 1MPa, and the drying temperature is 150°C. The preparation example is 1:0.5:0.07, and the emulsifier is made by mixing octylphenol polyoxyethylene ether and sorbitan monostearate in a mass ratio of 1:0.6.

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Abstract

The invention relates to the field of building materials, and particularly discloses expansive anti-crack fiber concrete and a preparation method thereof. The expansive anti-crack fiber concrete is prepared from the following components in parts by weight: 280-360 parts of cement, 200-230 parts of river sand, 470-510 parts of artificial sand, 950-990 parts of gravel, 150-190 parts of water, 120-150 parts of an admixture, 43-49.5 parts of an additive, 30-50 parts of a fiber capsule and 15-25 parts of an accelerator. The fiber capsule is prepared by mixing and spray-drying the following raw materials in parts by weight: 1-2 parts of polyphenylene sulfide fiber, 0.5-0.7 part of an alpha-cyanoacrylate adhesive, 0.25-0.3 part of an epoxy resin adhesive and 2-3 parts of an o-cresol formaldehyde epoxy resin. The expansive anti-crack fiber concrete has the advantages that crack repairing can be accelerated, the repairing time is shortened, and when the concrete is damaged again, the expansive anti-crack fiber concrete still has high self-repairing performance.

Description

technical field [0001] The application relates to the field of building materials, more specifically, it relates to an expansion-cracking-resistant fiber concrete and a preparation method thereof. Background technique [0002] Concrete is the largest and most widely used building material in the world today, but its brittle nature makes it poor in crack resistance, and it is easy to produce micro-cracks during construction or long-term use. The existence and expansion of these cracks will inevitably affect the quality of concrete. strength and durability. [0003] In order to reduce the impact of concrete cracking on its strength and durability, the main form of concrete repair is after-the-fact maintenance or regular maintenance. The main methods are: 1. Apply mortar on the surface, apply epoxy mastic on the surface; 2. Cement grouting, chemical grouting ; 3 Use steel reinforcement and prestressed reinforcement, etc. These repair methods are mainly aimed at visible cracks,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/12C04B16/06D01F8/16D01F8/06D01F1/10D06M11/83D06M11/46D06M13/224D06M101/20D06M101/30C04B111/20C04B111/27C04B111/34
CPCC04B28/04C04B20/12C04B16/0675D01F8/16D01F8/06D01F1/10D06M11/83D06M11/46D06M13/224D06M2101/20D06M2101/30C04B2111/29C04B2111/27C04B2111/343C04B14/068C04B18/04C04B14/02C04B18/08C04B18/141C04B2103/302C04B2103/65C04B2103/0068C04B24/122C04B24/32C04B24/121C04B20/1037C04B20/1022
Inventor 王辉马淑梅崔坤栋刘传海夏秀成王泽洋肖云侯润伟张娟
Owner 青岛光大集团工程有限公司
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