Basalt fiber reinforced cement based material and preparation method therefor

A basalt fiber and cement-reinforced technology, which is applied in the field of cement-based materials, can solve the problems of insignificant reinforcement effect of basalt fibers, increase the porosity of cement-based materials, and increase the brittleness of cement-based materials, so as to improve the structure and mechanical properties, and improve the resistance to resistance. The effect of pressing and increasing the density

Inactive Publication Date: 2016-05-04
CHINA MINSHENG ZHUYOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the addition of basalt fibers or other fibers, the accumulation structure principle of cement-based materials is seriously changed, and the porosity of cement-based materials is increased to a certain extent. At the same time, there will be an interface layer between fibers and cement cement substances. The interfac

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this embodiment, 1 cubic meter of basalt fiber-reinforced cement-based material is used as the total proportion.

[0029] (1) Proportional to 650kg / m 3 Cement, 150kg / m 3 Fly ash, 90kg / m 3 Silica fume, 1400kg / m 3 Continuously graded fine sand below 2mm is added to the concrete mixer and stirred until it is evenly mixed;

[0030] (2) Weigh water according to the water-cement ratio of 0.25, and add 25kg / m 3 High-efficiency polycarboxylate superplasticizer and 0.035kg / m 3 The citric acid is dispersed in water and added to the mixer in step (1) to continue mixing and the admixture is dispersed evenly;

[0031] (3) 2.5% (volume ratio) of basalt fibers with a diameter of 13-80 μm and a length of 3-45 mm are mixed with 0.18% (mass ratio) of epoxy emulsion, 0.15% (mass ratio) of water-based polyurethane emulsion, and 0.2% (mass ratio) silane coupling agent, 0.07% (mass ratio) lubricant and 0.05% (mass ratio) antistatic agent are mixed uniformly, then the above-mentioned...

Embodiment 2

[0036] In this embodiment, 1 cubic meter of basalt fiber-reinforced cement-based material is used as the total proportion.

[0037] Except that step (4) is not vacuumized, the others are the same as in Example 1. Table 1 lists the test results of basalt fiber reinforced cement-based materials in this example.

Embodiment 3

[0039] (1) Proportional to 700kg / m 3 Cement, 160kg / m 3 Fly ash, 140kg / m 3 Silica fume, 1500kg / m 3 Continuously graded fine sand below 2mm is added to the concrete mixer and stirred until it is evenly mixed;

[0040] (2) Weigh water according to the water-cement ratio of 0.2, and add 30kg / m 3 High-efficiency polycarboxylate superplasticizer and 0.04kg / m 3 The citric acid is dispersed in water and added to the mixer in step (1) to continue mixing and the admixture is dispersed evenly;

[0041] (3) 2.8% (volume ratio) of basalt fibers with a diameter of 13-80 μm and a length of 3-45 mm are mixed with 0.2% (mass ratio) of epoxy emulsion, 0.1% (mass ratio) of water-based polyurethane emulsion, and 0.3% (mass ratio) silane coupling agent, 0.08% (mass ratio) lubricant and 0.04% (mass ratio) antistatic agent are mixed uniformly, then the above-mentioned mixture is added to the mixer in step (2) and mixed uniformly;

[0042] (4) Pour the admixture in the mixer of step (3) into th...

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Abstract

The invention relates to cement-based materials and particularly discloses a basalt fiber reinforced cement based material and a preparation method therefor. The basalt fiber reinforced cement based material contains the following ingredients: 400-800kg/m<3> of cement, 150-330kg/m<3> of active mineral admixture, 800-1,500kg/m<3> of fine aggregate, 10-40kg/m<3> of water reducing agent, 0.01-0.05kg/m<3> of setting retarder, 0.5-3.0% (volume percent) of basalt fibers and 0.2-1.0% (mass percent) of fiber surface modifier. According to the basalt fiber reinforced cement based material and the preparation method therefor, through optimizing a formula, the compactness of the material is improved, meanwhile, the property of an interface layer between the basalt fibers and a cement bonding material is improved, and the interfacial bonding strength is improved. The structure and mechanical properties of the basalt fiber reinforced cement based material disclosed by the invention are improved relatively greatly, and the compression strength, folding strength and toughness are improved greatly.

Description

technical field [0001] The invention relates to cement-based materials, in particular to a basalt fiber reinforced cement-based material and a preparation method thereof. Background technique [0002] Cement-based materials have a series of advantages such as high strength, good durability, and low cost. However, cement-based materials have their own disadvantages such as large shrinkage deformation, high brittleness and easy cracking, etc., especially those developed by adding chemical admixtures. Although the strength of the new high-performance cement-based material has been improved, problems such as poor toughness, cracks, dry shrinkage and brittleness have also appeared. At present, there are many studies on improving the performance of cement-based materials by adding fibers, and adding basalt fibers is one of the common methods. Basalt fiber is a pure natural inorganic non-metallic material made of natural basalt ore through high-temperature melting and drawing. It ...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B20/10C04B14/46C04B18/08C04B18/14C04B24/06C04B24/24C04B103/30C04B103/22
CPCC04B20/1051C04B28/02C04B2103/22C04B2103/302C04B18/08C04B18/146C04B24/24C04B24/06C04B14/46C04B40/0028C04B20/1037Y02W30/91
Inventor 康志坚徐志辉张鹏
Owner CHINA MINSHENG ZHUYOU
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