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Impact-resistant and corrosion-proof cement-based composite material and preparation method thereof

A composite material and cement-based technology, applied in the field of building materials, can solve problems such as failure to meet construction requirements, and achieve the effects of easy construction, simple preparation method, and good impermeability.

Inactive Publication Date: 2017-02-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the fiber-reinforced cement-based composite material cracks, the fibers begin to bear the full load of the cracked matrix gradually, so that the ultimate bending strength of the composite material is improved. And impact resistance, reduction of micro-cracks and other improvements are limited, can not meet the construction requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare the impact-resistant and anti-corrosion cement-based composite material. The raw materials and dosage are as follows: 270g of cement, 90g of fly ash, 67.5g of mineral powder, 22.5g of silica fume, 360g of ultra-fine sand, 3.6g of steel fiber, 2.7g of polypropylene fiber, carbon Nanotube 5.4g, polyvinyl alcohol 0.9g, polycarboxylate superplasticizer 3.6g, water 117g. First add polypropylene fibers, carbon nanotubes, water reducer and polyvinyl alcohol into water and stir, then add cementitious materials and aggregates into water and stir, then add steel fibers and stir, and finally cast and vibrate to obtain the above-mentioned anti-corrosion Impact-resistant cement-based composites (mortar).

[0021] The cement-based composite material obtained in this example was tested with reference to the standard JGJ / T 70-2009 "Basic Performance Test Methods of Building Mortar". The test result of the impermeability of the mortar: the 28d impermeability pressure was 0.6MPa....

Embodiment 2

[0023] Prepare the impact-resistant and anti-corrosion cement-based composite material. The raw materials and dosage are as follows: 261g of cement, 81g of fly ash, 81g of mineral powder, 27g of silica fume, 360g of ultra-fine sand, 3.15g of steel fiber, 2.25g of polypropylene fiber, carbon nanotube 4.5g, polyvinyl alcohol 1.5g, water reducing agent 3.15g, water 117g. First add polypropylene fibers, carbon nanotubes, water reducer and polyvinyl alcohol into water and stir, then add cementitious materials and aggregates into water and stir, then add steel fibers and stir, and finally cast and vibrate to obtain the above-mentioned anti-corrosion Impact-resistant cement-based composites (mortar).

[0024] The cement-based composite material obtained in this example was tested with reference to the standard JGJ / T 70-2009 "Basic Performance Test Methods of Building Mortar". The test result of the impermeability of the mortar: the 28d impermeability pressure was 0.7MPa. Impact resi...

Embodiment 3

[0026] Prepare impact-resistant and anti-corrosion cement-based composite materials. The raw materials and dosage are as follows: 252g of cement, 85.5g of fly ash, 90g of mineral powder, 27g of silica fume, 450g of ultra-fine sand, 4.05g of steel fiber, 2.25g of polypropylene fiber, carbon nano Tube 5.4g, polyvinyl alcohol 1.13g, water reducer 2.7g, water 144g. First add polypropylene fibers, carbon nanotubes, water reducer and polyvinyl alcohol into water and stir, then add cementitious materials and aggregates into water and stir, then add steel fibers and stir, and finally cast and vibrate to obtain the above-mentioned anti-corrosion Impact-resistant cement-based composites (mortar).

[0027] The cement-based composite material obtained in this example was tested with reference to the standard JGJ / T 70-2009 "Basic Performance Test Methods of Building Mortar". The test result of the impermeability of the mortar: the 28d impermeability pressure was 0.6MPa. Impact resistance ...

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Abstract

The invention relates to an impact-resistant and corrosion-proof cement-based composite material and a preparation method thereof. The impact-resistant and corrosion-proof cement-based composite material comprises a cementing material, aggregate, steel fibers, polypropylene fibers, carbon nanotubes, polyvinyl alcohol, a water reducing agent and water. The mass ratio of the cementing material: the aggregate: the water is 1: 0.8-1: 0.26-0.32. With the weight of the cementing material counted as 100 parts, the composite material comprises 0.6-1.0 part of steel fibers, 0.5-0.8 part of polypropylene fibers, 1-1.5 parts of carbon nanotubes, 0.5-1 part of water reducing agent and 0.18-0.32 part of polyvinyl alcohol. According to the technical scheme of the preparation method, firstly, polypropylene fibers, carbon nanotubes, the water reducing agent and the polyvinyl alcohol are added into water and then obtained materials are stirred. Secondly, the cementing material and the aggregate are added and then obtained materials are stirred. Thirdly, the steel fibers are added and then obtained materials are stirred. Finally, obtained materials are subjected to casting, vibrating and molding to obtain the impact-resistant and corrosion-proof cement-based composite material.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to an impact-resistant and anti-corrosion cement-based composite material and a preparation method thereof. Background technique [0002] When concrete materials are used in underwater projects, they will be impacted by water and corroded and damaged by different harmful ionic substances. Improving the anti-corrosion of concrete can be solved by improving the hydrophobicity of concrete and increasing the anti-penetration ability of concrete. It is also possible to apply anti-corrosion coatings on the surface of concrete to isolate the concrete from the surrounding corrosive media to achieve the purpose of anti-corrosion. However, this method has a high engineering cost and short corrosion resistance time. [0003] Therefore, recently, a method of wrapping a layer of mortar with excellent impact resistance and corrosion resistance on the surface of concrete has been develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/74
CPCC04B28/04C04B2111/20C04B2111/74C04B18/141C04B18/08C04B18/146C04B14/06C04B14/48C04B16/0633C04B14/026C04B24/2623C04B2103/302
Inventor 李相国徐朋辉刘卓霖杨蓉蒋文广
Owner WUHAN UNIV OF TECH
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