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High-strength polyvinyl alcohol fiber reinforced cement-based composite material as well as preparation method and application thereof

A technology of polyvinyl alcohol fiber and reinforced cement, which is applied in the field of building materials to achieve the effects of rapid strength growth, increased strength, and improved strength and durability

Pending Publication Date: 2021-06-29
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Ultra-high performance concrete has ultra-high strength, excellent durability and good working performance, and its wide application will subvert the current design and construction of civil engineering structures; reactive powder concrete is one of the typical representatives of ultra-high performance concrete First, it is a cement-based composite material with high strength, high toughness, high durability and good volume stability, which was first proposed by Richard et al. of Bouygues company in France in 1993. For composite materials used in structures and composite structures, if the PVA-ECC material can be applied to ultra-high performance concrete, the comprehensive performance of the composite material will be effectively improved, but the prior art has not applied PVA-ECC material to Technology in Ultra High Performance Concrete

Method used

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  • High-strength polyvinyl alcohol fiber reinforced cement-based composite material as well as preparation method and application thereof
  • High-strength polyvinyl alcohol fiber reinforced cement-based composite material as well as preparation method and application thereof
  • High-strength polyvinyl alcohol fiber reinforced cement-based composite material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0033] A preparation method of high-strength polyvinyl alcohol fiber reinforced cement-based composite material, comprising the steps of:

[0034] (1) Weighing: Weigh according to the following raw materials in parts by weight: 100kg of superfine portland cement; 325kg of active mineral admixture; 230kg of inorganic admixture; 2kg of water-soluble defoamer; 2.3kg of water agent and lignosulfonate superplasticizer; 60kg of water; 5kg of polyvinyl alcohol fibers with a diameter of 12 μm and a length of 20 μm, for use;

[0035] Inorganic admixtures include quartz sand and diatomite, the mass ratio of quartz sand and diatomite is 4:1, the particle size of quartz sand is 0.075-0.15mm, and diatomite is ultrafine diatomite powder;

[0036] The active mineral admixture includes fly ash, silica fume and granulated blast furnace slag, and the mass ratio of fly ash, silica fume and granulated blast furnace slag is 1:0.5:1; the fly ash is ground pulverized coal Ash, its specific surface ...

Embodiment 2

[0042] A preparation method of high-strength polyvinyl alcohol fiber reinforced cement-based composite material, comprising the steps of:

[0043] (1) Weighing: Weigh according to the following raw materials in parts by weight: ultrafine Portland cement 115kg; active mineral admixture 335kg; inorganic admixture 220kg; water-soluble defoamer 1.5kg; 2.2kg of water agent; 50kg of water; 4kg of polyvinyl alcohol fibers with a diameter of 15 μm and a length of 15 μm, for standby;

[0044] The inorganic admixture includes quartz sand and diatomite, the mass ratio of quartz sand and diatomite is 5:1, the particle size of quartz sand is 0.075-0.15mm, and diatomite is ultrafine diatomite powder;

[0045] The active mineral admixture includes fly ash, silica fume and granulated blast furnace slag, and the mass ratio of fly ash, silica fume and granulated blast furnace slag is 1.2:0.5:1; the fly ash is ground pulverized coal Ash, its specific surface area is 500-700m 2 / kg; silica fume...

Embodiment 3

[0051] A preparation method of high-strength polyvinyl alcohol fiber reinforced cement-based composite material, comprising the steps of:

[0052] (2) Weighing: Weigh according to the following raw materials in parts by weight: 130kg of superfine portland cement; 350kg of active mineral admixture; 215kg of inorganic admixture; 1kg of water-soluble defoamer; 2kg of water agent; 45kg of water; 3kg of polyvinyl alcohol fibers with a diameter of 18 μm and a length of 10 μm, for standby;

[0053] Inorganic admixtures include quartz sand and diatomite, the mass ratio of quartz sand and diatomite is 6:1, the particle size of quartz sand is 0.075-0.15mm, and diatomite is ultrafine diatomite powder;

[0054] The active mineral admixture includes fly ash, silica fume and granulated blast furnace slag, and the mass ratio of fly ash, silica fume and granulated blast furnace slag is 1.5:0.5:1; the fly ash is ground pulverized coal Ash, its specific surface area is 500-700m 2 / kg; silica ...

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Abstract

The invention relates to the technical field of building materials, in particular to a high-strength polyvinyl alcohol fiber reinforced cement-based composite material and a preparation method and application thereof. The high-strength polyvinyl alcohol fiber reinforced cement-based composite material is prepared from the following raw materials in parts by weight: 100-130 parts of superfine Portland cement, 325-350 parts of an active mineral admixture, 215-230 parts of an inorganic admixture, 1-2 parts of a defoaming agent, 2-2.3 parts of a water reducing agent, 45-60 parts of water and 3-5 parts of polyvinyl alcohol fiber. According to the invention, a PVA-ECC material is applied to the ultra-high performance concrete to prepare the composite material, and the composite material is applied to preparation of an anti-seismic structure, a large-deformation structure and a composite structure.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength polyvinyl alcohol fiber reinforced cement-based composite material and a preparation method and application thereof. Background technique [0002] In the past few hundred years, concrete materials have made great contributions to modernization due to the advantages of easy material selection, simple mixing process, low cost, high bearing capacity and good compressive performance. With the expansion, the requirements for the performance of concrete materials are getting higher and higher. For some special structures and constructions that require materials to have better toughness, durability, impact resistance and tensile properties, ordinary concrete can no longer meet them. [0003] ECC is a kind of random distributed short fiber reinforced cement-based composite material with strong toughness. ECC usually uses cement, mineral admixtures and quartz sa...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B16/06C04B18/08C04B18/14C04B14/06C04B14/08C04B111/20
CPCC04B28/04C04B2201/50C04B2201/52C04B2111/2053C04B18/08C04B18/146C04B18/141C04B14/06C04B14/08C04B16/0641C04B2103/302C04B2103/50Y02W30/91Y02A30/30
Inventor 王英俊雷艳杰朱亚红
Owner XUCHANG UNIV
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