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Ultra-high-performance fiber concrete and production method thereof

A fiber-reinforced concrete, ultra-high-performance technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor brittleness, poor compactness and poor homogeneity, and achieve increased toughness and ductility, good Fluidity, the effect of improving compactness

Active Publication Date: 2018-08-17
陕西建研结构工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ultra-high performance fiber concrete is mostly composed of cement, gravel, sand, water and water reducing agent, which has poor compactness and homogeneity, and the interior of the concrete contains large pores and poor brittleness.

Method used

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  • Ultra-high-performance fiber concrete and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of ultra-high-performance fiber concrete of this embodiment is composed of P.O.52.5R Portland cement, silica fume, sand, steel fiber, polypropylene fiber, early-strength polycarboxylate high-efficiency water reducer, silicone defoamer and Composition of water; the loss on ignition of the silica fume is 6%, and the specific surface area of ​​the silica fume is 16000m 2 / kg, the mass content of silicon dioxide in the silica fume is 92%, the particle diameter of the sand is 0.85mm~2mm, and the mass ratio of the P.O.52.5R Portland cement, silica fume, sand and water is 1: 0.24:1.25:0.2, the water reducing rate of the early-strength polycarboxylate superplasticizer is 35%, and the dosage of the early-strength polycarboxylate superplasticizer is P.O.52.5R Portland cement and silica fume 2.38% of the total mass, the dosage of the organosilicon defoamer is 0.137% of the total mass of P.O.52.5R Portland cement and silica fume, the steel fiber is Shanghai Zhenqiang brand s...

Embodiment 2

[0023] A kind of ultra-high-performance fiber concrete of this embodiment is composed of P.O.52.5R Portland cement, silica fume, sand, steel fiber, polypropylene fiber, early-strength polycarboxylate high-efficiency water reducer, silicone defoamer and Composition of water; the loss on ignition of the silica fume is 5%, and the specific surface area of ​​the silica fume is 19000m 2 / kg, the mass content of silicon dioxide in the silica fume is 95%, the particle diameter of the sand is 0.85mm~2mm, and the mass ratio of the P.O.52.5R Portland cement, silica fume, sand and water is 1: 0.21:1.26:0.22, the water reducing rate of the early-strength polycarboxylate superplasticizer is 40%, and the dosage of the early-strength polycarboxylate superplasticizer is P.O.52.5R Portland cement and silica fume 2.35% of the total mass, the dosage of the organosilicon defoamer is 0.12% of the total mass of P.O.52.5R portland cement and silica fume, the steel fiber is Sichuan Sanhe brand steel ...

Embodiment 3

[0026] A kind of ultra-high-performance fiber concrete of this embodiment is composed of P.O.52.5R Portland cement, silica fume, sand, steel fiber, polypropylene fiber, early-strength polycarboxylate high-efficiency water reducer, silicone defoamer and Composition of water; the loss on ignition of the silica fume is 7%, and the specific surface area of ​​the silica fume is 19000m 2 / kg, the mass content of silica in silica fume is 94%, the particle diameter of described sand is 0.85mm~2mm, and the mass ratio of described P.O.52.5R Portland cement, silica fume, sand and water is 1: 0.22:1.27:0.24, the water reducing rate of the early-strength polycarboxylate superplasticizer is 33%, and the dosage of the early-strength polycarboxylate superplasticizer is P.O.52.5R portland cement and silica fume 2.35% of the total mass, the dosage of the organosilicon defoamer is 0.12% of the total mass of P.O.52.5R Portland cement and silica fume, and the steel fiber is the steel fiber produce...

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Abstract

The invention discloses ultra-high-performance fiber concrete, comprising cement, silica fume, sand, steel fiber, polypropylene fiber, a polycarboxylate superplasticizer, an organosilicon defoaming agent and water. The silica fume in the fiber concrete improves compactness and homogeneity for the concrete; the sand has filling and framework functions; stress can be effectively transmitted, and load can be effectively supported; contraction and cracking of the concrete are inhibited; the steel fiber inhibits and restrains the occurrence and development of microcracks in the concrete, so that the concrete has improved toughness and ductility. The invention also discloses a preparation method of the concrete, comprising: stirring well cement, silica fume, polypropylene fiber and sand, addingthe polycarboxylate superplasticizer, organosilicon defoaming agent and 90% by total mass of water, adding steel fiber, stirring well, adding the rest 10% of water, and stirring well. The production method has reasonable process and good simplicity as well as high efficiency.

Description

technical field [0001] The invention belongs to the technical field of building material preparation, and in particular relates to an ultra-high performance fiber concrete and a preparation method thereof. Background technique [0002] Ultra-high-performance fiber-reinforced concrete plays a role in improving the compressive strength and improving durability in the reinforcement of concrete structures. Ultra-high performance fiber reinforced concrete has strong deformation ability and strong bonding performance with other concrete structural components, which plays a vital role in improving the seismic performance of concrete structural components. At present, ultra-high-performance fiber-reinforced concrete is mostly composed of cement, gravel, sand, water and water-reducing agent, which has poor compactness and homogeneity, and the interior of the concrete contains large pores and poor brittleness. Contents of the invention [0003] The technical problem to be solved by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/14C04B14/48C04B16/06
CPCC04B14/48C04B16/0633C04B18/146C04B28/04C04B2201/50C04B14/06C04B24/24C04B24/42C04B22/002Y02W30/91
Inventor 梁兴文于婧李林高宗祺胡翱翔景晓辉张涛常亚峰皇垚华尹文哲
Owner 陕西建研结构工程股份有限公司
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