Low-cost high temperature resistant fiber reinforced cement-based composite material

A technology of high temperature resistant fiber and composite material, applied in the field of high temperature resistant fiber reinforced cement-based composite material, can solve the problems of difficult concrete application, inability to toughen concrete, high cost of nano materials, etc., and achieve the effect of low cost

Pending Publication Date: 2018-07-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fiber materials used are all microfiber materials, which have limited ability to control large-scale cracks, cannot effectively toughen concrete, and the cost of nanomaterials is high, making it difficult to apply in large quantities in concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: A low-cost high-temperature-resistant fiber-reinforced cement-based composite material, including the following components by weight ratio: 100 parts of Portland cement, 50 parts of medium-fine sand, 30 parts of water, polycarboxylic acid high-performance water-reducing 1.2 parts of agent, 2 parts of basalt fiber, 0.6 part of polypropylene fiber, and 2 parts of calcium carbonate whisker.

Embodiment 2

[0017] Example 2: A low-cost high-temperature-resistant fiber-reinforced cement-based composite material, including the following components by weight ratio: 100 parts of Portland cement, 50 parts of medium-fine sand, 35 parts of water, polycarboxylic acid high-performance water-reducing 1 part of agent, 2.5 parts of basalt fiber, 0.4 part of polypropylene fiber, 4 parts of calcium carbonate whisker.

Embodiment 3

[0018] Example 3: A low-cost high-temperature-resistant fiber-reinforced cement-based composite material, including the following components by weight ratio: 100 parts of Portland cement, 50 parts of medium-fine sand, 30 parts of water, polycarboxylic acid high-performance water-reducing 1.2 parts of agent, 1.5 parts of basalt fiber, 0.13 parts of polypropylene fiber, 5.5 parts of calcium carbonate whiskers.

[0019] In each of the above examples, pour the weighed cement, sand and calcium carbonate whiskers into the mixer and stir for 30 seconds; then pour the weighed water and water reducer and stir for 60 seconds; then pour the polypropylene fiber and stir 60s; finally pour basalt fiber, stir for 60s and then pour into shape to obtain the above-mentioned high temperature resistance, burst resistance, high durability, low cost fiber reinforced cement-based composite material.

[0020] A kind of high temperature resistant, anti-burst, high durability, low cost fiber reinforced...

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PUM

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Abstract

The invention relates to a low-cost high temperature resistant fiber reinforced cement-based composite material, and belongs to the technical field of building materials. The material is characterizedin that the volume percentage between reinforcing fibers and cement-based composite material matrix is 2.4-5.6:100, and the volume ratio of basalt fibers to polypropylene fibers and calcium carbonatewhiskers is 1:0.1-1.2:0.3-5.3. According to the high temperature resistant, burst resistant, high durability and low cost fiber reinforced cement-based composite material, the high temperature bearing capability and the burst resistance of the cement-based composite material are significantly improved due to the addition of the calcium carbonate whiskers, the polypropylene fibers and the basalt fibers, and the material has good durability, low cost and good market popularization value.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to a low-cost high-temperature-resistant fiber-reinforced cement-based composite material. Background technique [0002] Cement-based composite materials will burst at high temperatures, and the load-carrying capacity will be greatly reduced. However, existing cement-based composite materials are sometimes used in high-temperature environments or encounter accidents such as fire. Therefore, fiber reinforced materials are added to cement-based composite materials to prepare high-temperature resistant fibers. Reinforced cementitious composites. However, there are still some problems in the existing high-temperature-resistant fiber-reinforced cement-based composite materials, which need to be solved urgently. [0003] Existing representative technical documents in this field include: [0004] Document 1: Chinese invention patent, a fiber-reinforced cement-based composite mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/38C04B14/46C04B16/06
CPCC04B28/04C04B14/06C04B14/383C04B14/4656C04B16/0633C04B20/0052C04B2103/302
Inventor 曹明莉李黎
Owner DALIAN UNIV OF TECH
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