Straw gypsum lightweight plate and preparation method thereof

A straw and light technology, applied in the preparation of light boards, straw gypsum light boards, and wood-based panels, to achieve good durability, good sound insulation and good market prospects

Inactive Publication Date: 2010-06-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an environmentally friendly and energy-saving straw gypsum light board and its preparation method in view of many problems existing in the existing light wall

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Use a straw grinder to crush the rice and wheat straw to a specified length of 5-10mm, put it into the reaction kettle, add water to adjust, the amount of water used is twice the quality of the straw, adjust the pH value of hydrochloric acid to 5, and raise the temperature to 50°C at the same time .

[0020] 2) Add cellulase which is 1 / 1000th of the mass of the straw, stir for 60 minutes, add water glass to adjust the pH value to 9, and inactivate the enzyme.

[0021] 3) Discharging, the centrifuge filters out moisture, and dries for later use.

[0022] 4) Take the following ingredients in parts by weight: calcined gypsum powder-100, pretreated crushed straw powder-30, water-40 and gypsum retarder-0.6, commercially available redispersible latex powder-0.3 , Polyvinyl alcohol powder-0.2, white cement-10 and defoamer-0.1 are mixed evenly in the mixer.

[0023] 5) Put the mixed dispersion mixture into a paving machine to form a slab, fasten and cold-press it into a 60...

Embodiment 2

[0031] 1) Grind rice and wheat straws to a specified length (5-10mm) with a straw grinder, put them into the reaction kettle, add water to adjust, the amount of water used is twice the quality of the straws, adjust the pH value of hydrochloric acid to 5, and raise the temperature to 50°C.

[0032] 2) Add cellulase which is 1 / 1000th of the mass of the straw, stir for 60 minutes, add water glass to adjust the pH value to 9, and inactivate the enzyme.

[0033] 3) Discharging, the centrifuge filters out moisture, and dries for later use.

[0034] 4) Take the following ingredients in parts by weight: calcined gypsum powder-90, pretreated crushed straw powder-20, water-30 and gypsum retarder-0.5, commercially available redispersible latex powder-0.2 , Polyvinyl alcohol powder-0.4, white cement-5 and defoamer-0.1 are mixed evenly in the mixer.

[0035] 5) Put the mixed dispersion mixture into a paving machine to form a slab, fasten and cold-press it into a 60mm thick plate under th...

Embodiment 3

[0043] 1) Grind rice and wheat straws to a specified length (5-10mm) with a straw grinder, put them into the reaction kettle, add water to adjust, the amount of water used is twice the quality of the straws, adjust the pH value of hydrochloric acid to 5, and raise the temperature to 50 ℃.

[0044] 2) Add cellulase which is 1 / 1000th of the mass of the straw, stir for 60 minutes, add water glass to adjust the pH value to 9, and inactivate the enzyme.

[0045] 3) Discharging, the centrifuge filters out moisture, and dries for later use.

[0046] 4) Take the following ingredients in parts by weight: calcined gypsum powder-110, pretreated crushed straw powder-40, water-50 and gypsum retarder-0.7, commercially available redispersible latex powder-0.4 , Polyvinyl alcohol powder-0.2, white cement-15 and defoamer-0.2 are mixed evenly in the mixer.

[0047] 5) Put the mixed dispersion mixture into a paving machine to form a slab, fasten and cold-press it into a 60mm thick plate under ...

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Abstract

The invention discloses a straw gypsum lightweight plate, which comprises the following materials in part by weight: 90 to 100 parts of calcined gypsum, 20 to 40 parts of pulverized straw, 0.2 to 0.4 part of redispersible powder, 0.5 to 0.7 part of gypsum retarder, 0.2 to 0.4 part of polyvinyl alcohol (PVA) powder, 5 to 15 parts of white cement and 0.1 to 0.2 part of defoaming agent. The invention also discloses a method for preparing the straw gypsum lightweight plate, which comprises the following steps: firstly, pulverizing and putting straw in a reaction kettle for pretreatment; secondly, performing enzymolysis on the straw by adopting cellulose and centrifugalizing the straw to remove moisture: and thirdly, uniformly mixing in a stirring machine in a proportion of the raw material and water, paving mixture in a paving machine into a plate blank, performing fastening and cold compression on the plate blank to form the plate, and performing subsequent treatment to obtain the straw gypsum lightweight plate. The straw gypsum lightweight plate prepared by the method has the advantages of light weight, fireproofing, waterproofing, good sound isolation effect and good durability, is particularly suitable for an inner wall partition, a non-bearing wall and other building parts, and has good market prospect.

Description

technical field [0001] The invention relates to a gypsum board, in particular to a light board made of plaster of paris and straw as main raw materials, which belongs to the artificial board; the invention also relates to a preparation method of the straw gypsum light board. Background technique [0002] Existing light-duty partition boards mainly consist of materials such as fly ash, sandstone, cement, gypsum powder, and glass wool. Although the density is much smaller than that of solid clay bricks, the actual weight is still relatively heavy. Density (60mm thick) up to 70-100kg / m 2 , Construction is inconvenient. Another type of light-weight board material, such as a board made of perforated polystyrene board as the core material and covered with cement mortar, has poor strength and can only be used as a veneer insulation board. The cost of benzene board is relatively high, therefore, it is urgent to invent a kind of straw wall that can be light in weight and suitable f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B13/02E04C2/16B28B13/04
Inventor 李炎锋梁振宇鲍本林苏经宇田杰李俊梅
Owner BEIJING UNIV OF TECH
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