Fiber-modified gypsum-based composite material

A composite material and fiber modification technology, which is applied in the field of fiber-modified gypsum-based composite materials, can solve the problems of no improvement in gypsum strength and toughness, general lifting effect, and complicated process, so as to achieve good social benefits, increase strength, and improve The effect of ecological environment

Inactive Publication Date: 2012-06-20
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the fiber-reinforced gypsum product in the prior art mainly adopts glass fiber, gypsum powder, water reducer, retarder and water to make as main ingredients, for example: CN101284722A discloses a kind of glass fiber-reinforced gypsum product and its The manufacturing method uses glass fiber mesh cloth for reinforcement. Although the strength and toughness of the gypsum product are enhanced as a whole, faults appear in the part of the gypsum that does not contain the glass fiber layer, and the strength and toughness of this part of the gypsum are not improved.
CN101851081A discloses another method for glass fiber reinforced gypsum products, the difference is that 1-3cm broken glass fibers are used to disperse disorderly in the product, but supporting production equipment is required
This method uses α high-strength gypsum as raw material, which can increase the strength, but the improvement effect is general, and the process is more complicated and the cost is higher

Method used

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  • Fiber-modified gypsum-based composite material
  • Fiber-modified gypsum-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A fiber-modified gypsum-based composite material, recorded in parts by mass (for example: kilograms, the same below), firstly mix 100 parts of β-type hemihydrate phosphogypsum, 1.2 parts of polyvinyl alcohol fiber with a length of 9 mm, and 0.5 parts of high-efficiency reducing Add water agent and 0.1 part of retarder to the mixer and pre-stir for 60s, then add 46 parts of water and stir for 120s~180s, after stirring evenly, form a mold and vibrate to shape, and release the mold after it is condensed. The molded gypsum-based composites were cured under test conditions for 3 days. After testing, the 3-day flexural strength of the prepared composite material is 6.33MPa, and the compressive strength is 8.5MPa, which is 58.25% higher than that of the fiber-free material.

Embodiment 2

[0021] A fiber-modified gypsum-based composite material, recorded in parts by mass, first mix 100 parts of β-type hemihydrate phosphogypsum, 1 part of polyvinyl alcohol fiber with a length of 12 mm, 1 part of high-efficiency water reducer and 0.1 part of retarder Add to the mixer and pre-stir for 60s, then add 46 parts of water and stir for 120s to 180s, stir evenly, form a mold and vibrate to shape, and release the mold after it is condensed. The molded gypsum-based composites were cured under test conditions for 3 days. After testing, the 3-day flexural strength of the prepared composite material is 6.51MPa, and the compressive strength is 7.7MPa, which is 62.75% higher than that of the fiber-free material.

Embodiment 3

[0023] A fiber-modified gypsum-based composite material, recorded in parts by mass, first mix 100 parts of β-type hemihydrate phosphogypsum, 1.5 parts of polyvinyl alcohol fiber with a length of 15mm, 1 part of high-efficiency water reducer and 0.1 part of retarder Add to the mixer and pre-stir for 60s, then add 48 parts of water and stir for 120s to 180s, stir evenly, form a mold and vibrate to shape, and release the mold after condensation. The molded gypsum-based composites were cured under test conditions for 3 days. After testing, the 3-day flexural strength of the prepared composite material is 8.27MPa, and the compressive strength is 7.4MPa, which is 106.75% higher than that of the fiber-free material.

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Abstract

The invention discloses a fiber-modified gypsum-based composite material which is characterized by comprising the following components by mass ratio: 100 parts of beta-hemihydrate gypsum, 0.1-5 parts of high-efficiency water reducing agent, 0.05-3 parts of retarder, 0.1-5 parts of polyvinyl alcohol fiber and 40-65 parts of water. The polyvinyl alcohol fiber is short chopped fiber and has the length of 5-30mm and the good diameter of 6-70mum. The polyvinyl alcohol fiber is uniformly and disorderly distributed in the gypsum-based composite material, thus the strength and the toughness of all parts of the product can be greatly improved. The composite material disclosed by the invention has the characteristics of low cost, low power consumption, high strength and environment friendliness and can be used as the decorative material and the non-load-bearing building material.

Description

technical field [0001] The invention belongs to building materials containing gypsum, and relates to a fiber-modified gypsum-based composite material. It is especially suitable for indoor and outdoor architectural decoration plaster products, and can also be made into blocks for non-load-bearing wall materials in construction projects. Background technique [0002] Fiber-reinforced and modified gypsum products have the characteristics of high decoration, environmental protection, and fire prevention, and have good market demand. But the fiber-reinforced gypsum product in the prior art mainly adopts glass fiber, gypsum powder, water reducer, retarder and water to make as main ingredients, for example: CN101284722A discloses a kind of glass fiber-reinforced gypsum product and its The manufacturing method uses glass fiber mesh cloth for reinforcement. Although the strength and toughness of the gypsum product are enhanced as a whole, faults appear in the part of the gypsum that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
Inventor 霍冀川李春洪秦钢雷洪
Owner SOUTHWEAT UNIV OF SCI & TECH
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