A kind of high ductility cement-based composite material and preparation method thereof

A composite material and cement-based technology, applied in physical treatment, textiles and papermaking, fiber types, etc., can solve problems such as poor fracture toughness, building hazards, and easy cracking, and achieve the effect of improving strength and toughness

Active Publication Date: 2022-05-27
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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  • A kind of high ductility cement-based composite material and preparation method thereof
  • A kind of high ductility cement-based composite material and preparation method thereof
  • A kind of high ductility cement-based composite material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0037] Preparation examples of starting materials and intermediates

[0038] raw material

[0039] The cement is PO5 2.5 cement;

[0040] Fly ash is first-grade fly ash;

[0041] The mineral powder is S105 mineral powder;

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

[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 alcohol phosphate salt is cetostearyl alcohol phosphate salt;

[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. Mix 10kg polyoxyethylene polyoxypropylene block copolymer, 10kg fatty alcohol polyoxyethylene ether phosphate potassium salt, and 10kg higher alcohol phosphate ester salt, then add 2000kg emulsifier and mix to obtain dispersant;

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

[0053] A3. Mix the polyvinyl alcohol fiber after A2 treatment with the dispersant obtained from A1, the solid-liquid ratio is 1:200, shake at room temperature for 0.5h, and the shaking speed is 135r / min, then take out the sample and dry it to constant weight at 100℃ , to obtain modified polyvinyl alcohol fibers

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 POM fiber cleaned by B1 in a plasma processor for 60s. The processing parameters of the plasma processor are: air atmosphere, 400W power, and a distance between two electrodes of 3mm;

[0058] B3. The polyoxymethylene fibers treated by B2 are immediately immersed in nano-SiO with a mass concentration of 3% 2 In the aqueous solution, and at 60 °C, the reaction was oscillated for 3 hours at a speed of 135 r / min, and then the polyoxymethylene fiber was taken out, washed three times with clean water, and dried at 90 °C to constant weight to obtain the modified polyoxymethylene fiber.

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Abstract

The application relates to the technical field of building materials, and specifically discloses a high-ductility cement-based composite material and a preparation method thereof. A high-ductility cement-based composite material, comprising the following raw materials in parts by weight: 200-450 parts of cement, 100-350 parts of fly ash, 100-350 parts of mineral powder, 100-450 parts of aggregate, 20-45 parts of silica fume 5-25 parts of water reducing agent, 1-6 parts of defoamer, 0.1-0.8 parts of cellulose ether, 0.5-6 parts of spray regulator, 5-40 parts of polyvinyl alcohol fiber, 1000-3000 parts of water; The regulator includes magnesium aluminum silicate and starch ether in a weight ratio of (2-6):1. The compressive strength of the composite material 60d of the present application reaches 61.76N / mm 2 , The flexural strength reaches 19.44N / mm 2 , Bending strength reaches 15.10N / mm 2 , Bending toughness reaches 138.15KJ / m 3 , the strength and toughness of composite materials are better.

Description

technical field [0001] The present application relates to the technical field of building materials, and more particularly, 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, and are mixed with water, sand, stone or some necessary additives in proportion, stirred, compacted, and cured and hardened. [0003] Cement-based composite materials sometimes need spray construction. During spray construction, pre-prepared cement, sand, stones, water and a certain amount of admixtures are loaded into the sprayer, and high-pressure air is used to send them to the nozzle and accelerator. After mixing, it is sprayed at very high speed towards the surface of rock or concrete. [0004] In view of the above-mentioned related technologies, the applicant has found that the existing cement-based composite materials used f...

Claims

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Application Information

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Patent Type & Authority Patents(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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