Fiber reinforced concrete and preparation method thereof

A fiber-reinforced concrete technology, applied in the field of concrete, can solve problems such as structural damage, functional degradation, social loss, etc., and achieve the effects of improving impermeability, prolonging service life, and improving mechanical properties

Active Publication Date: 2016-11-16
江苏狮腾工程材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increase of the service time of these engineering structures, more and more attention has been paid to the durability damage of concrete materials and stru

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) 5 parts of ultra-short glass fiber, 75 parts of polyvinyl chloride chips, 0.5 parts of inorganic ceramic powder, 0.5 parts of coupling agent γ-aminopropyltriethoxysilane, and 0.5 parts of lubricant ethylene bisstearic acid amide The parts are mixed evenly to obtain the premix; after the premix is ​​heated and melted, it is introduced into the spinning box and heated at a high pressure of 150kg / cm 2 Extruded from a porous spinneret, then stretched through 40 times the spinneret holes for multiple times, and then cut into PVC modified glass fibers with a length of 3-5mm;

[0033] (2) 500 parts of Portland cement, 800 parts of fly ash, 200 parts of sand and 250 parts of water are stirred and mixed into cement slurry;

[0034] (3) After mixing 50 parts of polyvinyl chloride modified glass fiber and cement slurry, add 20 parts of water reducing agent and 70 parts of nano-kaolin and continue mixing evenly to obtain fiber reinforced concrete.

Embodiment 2

[0036] (1) 25 parts of ultra-short glass fiber, 95 parts of polyvinyl chloride chips, 3 parts of inorganic ceramic powder, 3 parts of coupling agent γ-(2,3-glycidyloxy) propyltrimethoxysilane, lubricant 1 part of ethylene bis stearamide is mixed uniformly to obtain a premix; after the premix is ​​heated and melted, it is introduced into the spinning box at a high pressure of 200kg / cm 2 Extruded from a porous spinneret, then stretched through 60 times of spinneret holes for multiple times, and then cut into PVC modified glass fibers with a length of 3-5mm;

[0037] (2) 600 parts of Portland cement, 800 parts of fly ash, 300 parts of sand and 300 parts of water are stirred and mixed into cement slurry;

[0038] (3) After mixing 80 parts of polyvinyl chloride modified glass fiber and cement slurry, add 30 parts of water reducer and 50 parts of nano silicon dioxide and continue to mix evenly to obtain fiber reinforced concrete.

Embodiment 3

[0040] (1) 15 parts of ultra-short glass fiber, 85 parts of polyvinyl chloride chips, 2 parts of inorganic ceramic powder, 1 part of coupling agent γ-(2,3-glycidyloxy) propyltrimethoxysilane, lubricant 0.8 parts of pentaerythritol stearate are mixed uniformly to obtain a premix; after the premix is ​​heated and melted, it is introduced into the spinning box at a high pressure of 180kg / cm 2 Extruded from a porous spinneret, then stretched through 50 times the spinneret holes for multiple times, and then cut into PVC modified glass fibers with a length of 3-5mm;

[0041] (2) 550 parts of Portland cement, 700 parts of fly ash, 250 parts of sand and 280 parts of water are stirred and mixed into cement slurry;

[0042] (3) After mixing 60 parts of polyvinyl chloride modified glass fiber and cement slurry, add 25 parts of water reducer and 60 parts of nano-diatomaceous earth and continue mixing evenly to obtain fiber reinforced concrete.

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PUM

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Abstract

The invention discloses fiber reinforced concrete and a preparation method thereof. The fiber reinforced concrete is prepared from the following components in parts by weight: portland cement 500-600 parts, flyash 600-800 parts, sand 200-300 parts, water 250-300 parts, polyvinyl chloride modified glass fibers 50-80 parts, a water reducer 20-30 parts, and nano packing 50-70 parts. Polyvinyl chloride slices are used for modifying the glass fibers so as to improve mechanical performance of fibers, and the tensile strength, elastic modulus and the like of the fibers are improved by about 10%. Then the fibers are added in cement slurry, chloride penetration resistance of a cement base body can be improved remarkably, the impermeability is improved by 20-30%, the mechanical performance is improved by 25-30%, the bending deflection can reach 20-30 mm, the fiber reinforced concrete can well adapt to effect of repeated load of a bridge structure, the structure repair and reinforcement effect can be improved remarkably, and the service life is prolonged.

Description

technical field [0001] The invention relates to a concrete, in particular to a fiber concrete and a preparation method thereof. Background technique [0002] Concrete structure is one of the most widely used structures. In my country, about 70% of housing construction and 50% of bridge structures use concrete structure. With the increase of the service time of these engineering structures, more and more attention has been paid to the durability damage of concrete materials and structures. Many engineering structures often cause functional degradation or even structural damage due to durability, which brings unnecessary damage to society. loss. [0003] For example, with the increasing size and weight of bridge-crossing vehicles and the rapid growth of traffic volume, the impact force of vehicles on bridge components and the frequency of stress exceeding are also increasing, which has a greater impact on component fatigue. This makes the bridge deck pavement in an extremely...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/02C04B14/42C04B111/20
CPCC04B20/023C04B28/04C04B2111/20C04B18/08C04B14/06C04B14/42C04B2103/302C04B20/008C04B14/106C04B14/062C04B14/08
Inventor 王青
Owner 江苏狮腾工程材料有限公司
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