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Flexural and durable cement-based composite material containing PP fiber

A composite material and cement-based technology, applied in the field of building materials, can solve the problems of poor tolerance, weak bonding force, and disintegration of cement-based composite materials.

Active Publication Date: 2019-11-08
维特国际新材料(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, a large amount of fly ash is added as a raw material, which consumes the existing industrial waste that is not conducive to environmental protection, reduces the amount of cement used, and is conducive to reducing carbon emissions, making the high-ductility cement-based composite material greener, but the surface of PVA fiber is smooth There is no attachment site, and the bonding force with cement, fly ash, and sand is weak after being added. The long-term use tolerance is poor, and it is easy to slip under the action of external force, resulting in the overall disintegration of cement-based composite materials. The practical application prospect is worrying.

Method used

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  • Flexural and durable cement-based composite material containing PP fiber
  • Flexural and durable cement-based composite material containing PP fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of anti-bending and durable cement-based composite material containing PP fiber, consisting of the following components by weight:

[0028] 33 parts of cement, 40 parts of aggregate made by mixing river sand with a particle size of 2-5 mm and river sand with a particle size of 0.5-1 mm in a weight ratio of 1:1, 14 parts of PP fiber, 10 parts of sisal fiber, Fly ash, granulated blast furnace slag, and silica fume powder are mixed in a weight ratio of 1:1:1, 20 parts of mineral admixture, 8 parts of modified waste tire rubber powder, 2 parts of sodium lignin sulfonate, hydroxyethyl 4 parts of base cellulose, 0.4 parts of tetraethylenepentamine, 2 parts of melamine-based water reducer, 2 parts of water-based epoxy resin BASF-1455, 15 parts of tertiary vinyl ester copolymer emulsion, and 30 parts of water.

[0029] The preparation method of above-mentioned modified waste tire rubber powder is as follows:

[0030] Add sorbitan monopalmitate and polyvinyl alcohol to w...

Embodiment 2

[0034] A kind of anti-bending and durable cement-based composite material containing PP fiber, consisting of the following components by weight:

[0035] 50 parts of cement, 30 parts of aggregate mixed with river sand with a particle size of 2-5 mm and river sand with a particle size of 0.5-1 mm in a weight ratio of 1:1, 12 parts of PP fiber, 7 parts of sisal fiber, Granulated blast furnace slag and shell powder are mixed at a weight ratio of 1:1, 16 parts of mineral admixture, 6 parts of modified waste tire rubber powder, 1.2 parts of sodium lignosulfonate, 3 parts of hydroxyethyl cellulose, four parts 0.4 parts of ethylene pentamine, 2 parts of melamine-based water reducer, 4 parts of water-based epoxy resin BASF-1422, 12 parts of vinyl tertiary carbonate copolymer emulsion, and 25 parts of water.

[0036] The preparation method of above-mentioned modified waste tire rubber powder is as follows:

[0037] Add sorbitan monopalmitate and polyvinyl alcohol to water 100 times its ...

Embodiment 3

[0041] A kind of anti-bending and durable cement-based composite material containing PP fiber, consisting of the following components by weight:

[0042] 40 parts of cement, 35 parts of aggregate made by mixing river sand with a particle size of 2-5 mm and river sand with a particle size of 0.5-1 mm in a weight ratio of 1:1, 10 parts of PP fiber, 5 parts of sisal fiber, 12 parts of steel slag powder, 6 parts of modified waste tire rubber powder, 1 part of sodium lignosulfonate, 3 parts of hydroxyethyl cellulose, 0.8 parts of tetraethylenepentamine, 3 parts of melamine-based water reducer, water-based epoxy resin 4 parts of BASF-1455, 12 parts of vinyl tertiary carbonate copolymer emulsion, 25 parts of water.

[0043] The preparation method of above-mentioned modified waste tire rubber powder is as follows:

[0044] Add sorbitan monopalmitate and polyvinyl alcohol to water 100 times its total weight at a weight ratio of 1:1, stir in a water bath at 50°C for 15 minutes, add was...

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Abstract

Relating to the field of building materials, the invention provides a flexural and durable cement-based composite material containing PP fiber. The composite material is composed of the following components by weight: 30-50 parts of cement, 30-50 parts of aggregate, 10-15 parts of PP fiber, 5-10 parts of sisal fiber, 10-20 parts of a mineral admixture, 5-10 parts of modified waste tire rubber powder, 1-2 parts of sodium lignosulfonate, 2-5 parts of hydroxyethyl cellulose, 0.1-1 part of tetraethylenepentamine, 1-3 parts of a melamine water reducing agent, 2-4 parts of a waterborne epoxy resin surface modifier, 10-15 parts of a vinyl versatate copolymer emulsion, and 20-30 parts water. The cement-based composite material provided by the invention has excellent mechanical strength, and has 28d compressive strength of greater than or equal to 90MPa and 28d splitting tensile strength of greater than or equal to 6Mpa, thus being far superior to commercially available cement-based composite materials.

Description

technical field [0001] The invention relates to the field of building materials, and specifically relates to a bending-resistant and durable cement-based composite material containing PP fibers. Background technique [0002] Due to the high brittleness of traditional cement-based building materials such as concrete, the application in many special engineering structures or special components of structures has been limited. In order to overcome the unique brittleness of traditional cement-based materials, a special high-performance fiber-reinforced cement-based composite material has been gradually developed in recent years, which is called engineering cement-based composite material abroad. Compared with traditional cement-based materials, this cement-based composite material has an important characteristic; that is, when the material cracks, its tensile bearing capacity can continue to increase, so that the material can undergo strain hardening with multi-slit cracking. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B2201/52C04B14/06C04B16/0633C04B18/248C04B18/22C04B18/146C04B18/141C04B18/08C04B24/18C04B24/121C04B24/125C04B24/383C04B24/24C04B24/281C04B14/28C04B18/142
Inventor 胡汉桥魏小华张运华王欣
Owner 维特国际新材料(武汉)有限公司
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