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Method of preparing light insulating batten from salt gypsum and plant straws and light insulating batten prepared thereby

A technology of plant straw and salt gypsum is applied in the field of lightweight thermal insulation slats, which can solve the problems of poor thermal insulation performance and low strength, and achieve the effects of good economic and social benefits, low price and production cost saving.

Pending Publication Date: 2019-07-19
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal insulation board prepared by the invention can not only solve the problems of poor thermal insulation performance and low strength of the slats prepared with salt gypsum, but also can make full use of industrial and agricultural waste salt gypsum and plant straws, turn waste into treasure, and reduce the cost of light thermal insulation slats. Lower production costs, improve economic efficiency, and comply with national policies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing light-weight insulation slats with salt gypsum and plant straw. The raw materials are composed of main materials and auxiliary materials. The percentage of the total weight is as follows: wheat straw 1wt%, sodium tripolyphosphate retarder 0.16wt%, glass fiber 0.07%, naphthalene-based water reducer 1.0wt%, sodium oxalate activator 0.07wt%, sodium silicate activator 0.70 wt%, first mix the retarder, water reducer, and activator evenly, then add water accounting for 20wt% of the total weight of the main material and stir evenly, then add building gypsum, wheat straw, glass fiber, salt gypsum, and white cement in sequence, Stir it evenly in a blender, add it to the mold, cure it to the specified age, remove the mold and let it dry before use. According to the standard test of GB / T23451-2009 "Lightweight Partition Wall Slats for Buildings", the basic properties of the material are as follows: compressive strength is 4.1MPa, softening coefficient is 0.8...

Embodiment 2

[0035]A method for preparing light-weight insulation slats with salt gypsum and plant straw. The raw materials are composed of main materials and auxiliary materials. The percentage of the total weight is as follows: wheat straw 1wt%, sodium tripolyphosphate retarder 0.18wt%, glass fiber 0.07%, naphthalene-based water reducer 1.0wt%, sodium oxalate activator 0.06wt%, sodium silicate activator 0.60 wt%, first mix the retarder, water reducer, and activator evenly, then add water accounting for 25wt% of the total weight of the main material and stir evenly, then add building gypsum, wheat straw, glass fiber, salt gypsum, and white cement in sequence, Stir it evenly in a blender, add it to the mold, cure it to the specified age, remove the mold and let it dry before use. According to the standard test of GB / T23451-2009 "Lightweight Partition Wall Slats for Buildings", the basic properties of the material are as follows: compressive strength is 4.3MPa, softening coefficient is 0.88...

Embodiment 3

[0037] A method for preparing light-weight insulation slats with salt gypsum and plant straw. The raw materials are composed of main materials and auxiliary materials. The percentage of the total weight is as follows: corn stalk 1wt%, sodium tripolyphosphate retarder 0.18wt%, glass fiber 0.056%, polypropylene fiber 0.014%, polycarboxylate water reducer 1.0wt%, sodium oxalate activator 0.07wt% , Sodium silicate activator 0.70wt%, firstly mix the retarder, water reducer and activator evenly, add water accounting for 17wt% of the total weight of the main material and stir evenly, then add building gypsum, corn stalks, fiber, Salt gypsum and white cement are mixed evenly in a mixer, added to the mold, cured to the specified age, and then dried after removal of the mold. According to the standard test of GB / T 23451-2009 "Lightweight Partition Wall Slats for Buildings", the basic properties of the material are as follows: the compressive strength is 2.3MPa, the softening coefficient...

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Abstract

The invention discloses a method of preparing a light insulating batten from salt gypsum and plant straws and the light insulating batten prepared thereby. A raw material is prepared from a main material and auxiliary materials. The main material is prepared from the following components in percent by weight: 40-60wt% of salt gypsum, 30-45wt% of building gypsum and 10-15wt% of white cement. The raw material is prepared from the auxiliary materials in percent by weight: 1-3wt% of plant straws, 0.15-0.20wt% of a retarder, 0.05-0.20wt%of fibers, 0.5-2.0wt% of a water reducer and 0.3-1.0wt% of anactivator. The method comprises the following steps: first, uniformly mixing the retarder, the water reducer and the activator; adding the mixture into water which accounts for 20-30wt% of total weight of the main material to be stirred; then successively adding residual materials; uniformly stirring the mixture in a stirrer; adding the mixture into a mold; maintaining the mold to a regulated age;and removing the mold and airing the mixture to obtain the light insulating batten. The light insulating batten is free of radioactivity, good in insulating effect and high in compressive strength, and the production cost of the light insulating batten is lowered.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of industrial solid waste and building wall materials, and in particular relates to a method for preparing light-weight heat-insulating slats from salt gypsum and plant straws and the prepared light-weight heat-insulating slats. Background technique [0002] Salt gypsum is the waste residue mainly composed of anhydrous calcium sulfate discharged during the production process of my country's salt industry. For every 1 million tons of vacuum salt produced, about 20,000 tons of salt gypsum waste residue will be produced. For a long time, due to its low activity and slow hydration, the utilization of salt gypsum has become a problem. Therefore, it is mainly disposed of by stockpiling and landfilling, which not only occupies a large amount of land, but also pollutes groundwater during the process of stockpiling and landfilling. source, which brings a great burden to the salt-making enterprises ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/16C04B111/40
CPCC04B28/16C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B22/143C04B7/02C04B18/24C04B2103/22C04B2103/302C04B24/04C04B12/04C04B14/42C04B16/0633
Inventor 李志新王继娜徐开东马先伟张建武牛季收
Owner HENAN UNIV OF URBAN CONSTR
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