High-ductility cement-based composite material and preparation method thereof

A composite material, cement-based technology, used in fiber types, textiles and papermaking, ultrasonic/sonic fiber processing, etc., can solve problems such as poor fracture toughness, prone to cracking, building damage, etc., to achieve the effect of improving strength and toughness

Active Publication Date: 2021-12-07
河北拓创远威科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned related technologies, the applicant found that the existing cement-based composite materials used for spraying construction have poor fracture toughness and are prone to cracking, which brings certain hazards to buildings.

Method used

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  • High-ductility cement-based composite material and preparation method thereof
  • High-ductility cement-based composite material and preparation method thereof
  • High-ductility cement-based composite material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0037] Preparation Examples of Raw Materials and Intermediates

[0038] raw material

[0039] The cement is PO5 2.5 cement;

[0040] Fly ash is a first-class fly ash;

[0041] Mineral powder is S105 mineral powder;

[0042] The water reducer is a high-efficiency polycarboxylate water reducer;

[0043] Starch ether is potato starch ether;

[0044] Polyoxyethylene polyoxypropylene block copolymer, CAS No. 9003-11-6, molecular weight 102.132;

[0045] Fatty alcohol polyoxyethylene ether phosphate potassium salt, model MOA3PK;

[0046] The higher carbon alcohol phosphate is cetostearyl phosphate;

[0047] The emulsifier is fatty alcohol polyoxyethylene ether, the model is AE09.

preparation example 1

[0050] The preparation method of modified polyvinyl alcohol fiber:

[0051] A1. 10kg polyoxyethylene polyoxypropylene block copolymer, 10kg fatty alcohol polyoxyethylene ether phosphate potassium salt, 10kg higher carbon alcohol phosphate ester salt are mixed homogeneously, then add 2000kg emulsifier and mix homogeneously, make dispersant;

[0052] A2. Soak the polyvinyl alcohol fiber in acetone solution, heat and reflux for 5 hours, take out the polyvinyl alcohol fiber, wash it twice with water, and then dry it to constant weight at 100°C;

[0053] A3. Mix the polyvinyl alcohol fibers treated in A2 with the dispersant obtained in A1. The solid-to-liquid ratio is 1:200. Shake at room temperature for 0.5h at a speed of 135r / min, then take out the sample and dry it to constant weight at 100°C , to obtain modified polyvinyl alcohol fiber

preparation example 2

[0055] The preparation method of modified polyoxymethylene fiber:

[0056] B1. Wash the polyoxymethylene fiber with absolute ethanol, and then vacuum-dry the polyoxymethylene fiber at 90°C for 2 hours;

[0057] B2. Treat the polyoxymethylene fibers cleaned by B1 in a plasma processor for 60s. The processing parameters of the plasma processor are: air atmosphere, 400W power, and 3mm distance between two electrodes;

[0058] B3. The polyoxymethylene fiber treated by B2 is immediately immersed in nano-SiO with a mass concentration of 3%. 2 In aqueous solution, and at 60°C, oscillate for 3 hours at a speed of 135r / min, then take out the polyoxymethylene fiber, wash it with water three times, and dry it at 90°C until constant weight to obtain the modified polyoxymethylene fiber.

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Abstract

The invention relates to the technical field of building materials, and particularly discloses a high-ductility cement-based composite material and a preparation method thereof. The high-ductility cement-based composite material is prepared from the following raw materials in parts by weight: 200 to 450 parts of cement, 100 to 350 parts of fly ash, 100 to 350 parts of mineral powder, 100 to 450 parts of aggregate, 20 to 45 parts of silica fume, 5 to 25 parts of a water reducing agent, 1 to 6 parts of a de-foaming agent, 0.1 to 0.8 part of cellulose ether, 0.5 to 6 parts of a spraying regulator, 5 to 40 parts of polyvinyl alcohol fiber and 1000 to 3000 parts of water, wherein the spraying regulator comprises magnesium aluminum silicate and starch ether in a weight ratio of (2-6):1. The 60d compressive strength of the composite material reaches 61.76 N/mm<2>, the breaking strength reaches 19.44 N/mm<2>, the bending strength reaches 15.10 N/mm<2>, the bending toughness reaches 138.15 KJ/m<3>, and the strength and toughness of the composite material are good.

Description

technical field [0001] The application relates to the technical field of building materials, more specifically, it relates to a high-ductility cement-based composite material and a preparation method thereof. Background technique [0002] Cement-based composite materials refer to building materials that use cement as the main cementing material, mixed with water, sand, stone or some necessary admixtures in proportion, mixed, compacted and formed, and cured and hardened. [0003] Cement-based composite materials sometimes need spraying construction. During spraying construction, the pre-prepared cement, sand, stones, water and a certain amount of admixture are loaded into the sprayer, and sent to the nozzle and accelerator by high-pressure air. After mixing, spray at high velocity onto rock or concrete surfaces. [0004] In view of the above-mentioned related technologies, the applicant found that the existing cement-based composite materials used for spraying construction h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/04C04B16/06C04B24/38D06M15/53D06M13/295D06M13/292D06M10/02D06M11/79D06M101/24D06M101/30
CPCC04B28/04C04B16/0641C04B14/042C04B24/38C04B16/0675D06M15/53D06M13/295D06M13/292D06M10/025D06M11/79C04B2111/00155C04B2201/50D06M2101/24C04B18/08C04B18/12C04B14/06C04B18/146C04B2103/302C04B2103/50C04B24/383
Inventor 不公告发明人
Owner 河北拓创远威科技有限公司
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