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Gypsum-based building material prepared from plant fibers for treating indoor formaldehyde and application method thereof

A plant fiber and building material technology, which is applied in the field of preparing building gypsum materials that absorb formaldehyde, can solve the problems of resource waste and environmental pollution, and achieve the effects of energy saving, good decoration, and high waste utilization rate

Inactive Publication Date: 2014-02-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More than 95% of these plant straws have not been effectively used, but directly burned on the spot, causing environmental pollution and waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Soak straw in phosphogypsum wastewater for 24 hours, dry, N 2 Under the atmosphere, heat preservation at 313°C for 20 minutes in a muffle furnace to obtain semi-carbonized plant fibers, and then soak in phosphogypsum wastewater for 6 hours to obtain semi-carbonized plant fibers, and then dry them. The phosphogypsum wastewater is the primary washing wastewater in the phosphogypsum preparation process, its pH value is 3.0, and the solution contains a large amount of F - 、PO 4 3+ 、PO 3 + Plasma.

[0032]10% of semi-carbonized plant fiber, 53.59% of α-hemihydrate gypsum construction gypsum, 5% of hemihydrate gypsum whisker, 10% of slaked lime, 10% of white cement, 10% of expanded vermiculite, 0.5% of polycarboxylate superplasticizer, Sodium citrate 0.2%, methyl cellulose ether 0.01%, commercially available internal mixed antistatic agent 0.5%, copper oxide 0.2%, mix to obtain a mixture, add water accounting for 25% of the mixture mass and mix and stir evenly, that is ...

Embodiment 2

[0036] Soak straw in phosphogypsum wastewater for 24 hours, dry, N 2 Under the atmosphere, heat preservation at 313°C for 20 minutes in a muffle furnace to obtain semi-carbonized plant fibers, which will be soaked in phosphogypsum wastewater for 8 hours again, and dried. The phosphogypsum wastewater is prepared from phosphogypsum The primary washing wastewater in the process has a pH value of 4.5, and the solution contains a large amount of F - 、PO 4 3+ 、PO 3 + Plasma.

[0037] 20% of semi-carbonized plant fiber, 39.29% of building gypsum, 6% of hemihydrate gypsum whisker, 10% of slaked lime, 8% of white cement, 15% of expanded vermiculite, 0.5% of polycarboxylate superplasticizer, 0.2% of citric acid, 0.01% of polyacrylamide, 0.6% of commercially available internal mixed antistatic agent, and 0.4% of ferrous oxide are mixed to obtain a mixture, and water accounting for 33% of the mixture is added to mix and stir evenly to obtain a functional gypsum material; When using,...

Embodiment 3

[0041] Soak corn stalks in phosphogypsum wastewater for 24 hours, then dry, N 2 Under the atmosphere, heat preservation at 365°C for 30 minutes in a muffle furnace to obtain semi-carbonized plant fibers, which will be soaked in phosphogypsum wastewater for 6 hours again, and dried. The phosphogypsum wastewater is prepared from phosphogypsum The primary washing wastewater in the process has a pH value of 4.0, and the solution contains a large amount of F - 、PO 4 3+ 、PO 3 + Plasma.

[0042] Mix 5% of semi-carbonized plant fiber, 57.59% of building gypsum, 10% of hemihydrate gypsum whisker, 5% of slaked lime, 6% of white cement, 15% of expanded vermiculite, 0.5% of naphthalene-based water reducer, 0.2% of citric acid, and 0.01% of base cellulose ether, 0.5% of commercially available internal mixed antistatic agent, and 0.2% of ferrous oxide are mixed to obtain a mixture, and water accounting for 28% of the mixture is added to mix and stir evenly to obtain a functional gypsum...

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Abstract

The invention relates to gypsum building materials, and particularly relates to a gypsum-based building material prepared from plant fibers for treating indoor formaldehyde and an application method thereof. The gypsum-based building material is formed by adding water to a mixture and then stirring the watered mixture, wherein the mixture is formed by mixing the following components by percent: 5-20% of semi-carbonization plant fiber, 30-70% of gypsum for buildings, 1-20% of semi-hydrated gypsum whisker, 1-20% of hydrated lime, 1-10% of white cement, 1-20% of expanded vermiculite, 0.1-1% of water reducing agent, 0.1-1% of retarder, 0.01-1% of thickening agent, 0.1-1% of antistatic agent and 0.1-1% of inorganic pigment, and the mass of the water accounts for 20-50% of the mass of the mixture. The utilization rate of wastes is realized; the prepared material has high formaldehyde adsorption property; the gypsum-based building material has the advantages of heat retaining property, good water resistance, small deformation, high mechanical strength, good decorative property and the like.

Description

technical field [0001] The invention relates to the preparation of building gypsum materials for absorbing formaldehyde, in particular to a gypsum-based building material for indoor formaldehyde treatment by using plant fibers and an application method thereof. Background technique [0002] Formaldehyde is a kind of colorless strong irritating gas, has been identified as carcinogenic and teratogenic shape material by the World Health Organization. The release of formaldehyde can cause tears in the eyes, inflammation of the cornea and conjunctiva, skin allergies, nasopharyngeal discomfort, cough, acute and chronic bronchitis and other respiratory diseases. It can also cause nausea, vomiting, and gastrointestinal disorders. Headaches, pneumonia, pulmonary edema, loss of appetite, and even death. In newly renovated houses, formaldehyde generally exceeds the standard. Formaldehyde is hidden in various furniture and decoration materials, and it is emitted into the indoor air onl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B16/02
Inventor 蹇守卫汪婷马保国孔维郅真真王智
Owner WUHAN UNIV OF TECH
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