CN101343168A - Straw gypsum composite board and preparation thereof - Google Patents
Straw gypsum composite board and preparation thereof Download PDFInfo
- Publication number
- CN101343168A CN101343168A CNA200810136954XA CN200810136954A CN101343168A CN 101343168 A CN101343168 A CN 101343168A CN A200810136954X A CNA200810136954X A CN A200810136954XA CN 200810136954 A CN200810136954 A CN 200810136954A CN 101343168 A CN101343168 A CN 101343168A
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- CN
- China
- Prior art keywords
- straw
- composite board
- gypsum
- parts
- citric acid
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Disclosed is a straw gypsum composite board as well as a preparation method thereof, which relate to the composite board and the preparation method. The composite board and method solve the problems of poor gluing property of adhesive, high cost, complex process and poor service performance of products of the current method taking straws as materials to prepare the composite board. The straw gypsum composite board is prepared by gypsum, straw particles, water and a citric acid solution. The method comprises: firstly, preparing the straw particles; secondly, weighting raw materials; thirdly, mixing the straw particles with gypsum after treating the particles, then adding water and the citric acid solution for remixing; fourthly, paving the materials into a slab, then autoclaving the materials after pre-pressing; and fifthly, drying after preservation, finally obtaining the straw gypsum composite board. The composite board and method have advantages of nonuse of adhesive, low production cost, simple process and strong service performance of products.
Description
Technical field
The present invention relates to a kind of composition board and preparation method thereof.
Background technology
The inexpensive new decorative material for building that current building trade, especially villages and small towns comfortable house requirement of engineering are a large amount of; therefore make full use of the stalk residuum; as straw; make the environment-friendly type composite material for decoration; can save a large amount of timber, play protecting forest resources, reducing less environmental contamination.Utilize in the Application of composite of straw for raw material, mainly concentrate on aspects such as making board-like material and wrapping material, but because the harvest season property of straw is stronger, and tap density is less, apt to rot, be unfavorable for long-distance transportation and long-time the storage, and relative Wooden Biomass material, its staple length is less, fibre content is lower, and ash content and solution extractives content are higher, and waxy substance is contained on the surface, include mineral substance, be unfavorable for the bonding of tackiness agent.
At present, with the straw is in the production of feedstock production composition board, have the tackiness agent that adopts conventional urea-formaldehyde resin adhesive class, glue performance is relatively poor, and adopts the tackiness agent of isocyanate glue class to cost an arm and a leg, cause the production cost height, complex process, and the goods use properties is poor,, resistance to flame difference low etc. as intensity, thereby the use of goods is restricted, and loses the market competitiveness.
Summary of the invention
The present invention seeks in order to solve existing is to have the problem of tackiness agent gummed poor-performing, cost height, complex process and goods use properties difference in the method for feedstock production composition board with the straw, and a kind of straw gypsum composite board and preparation method thereof is provided.
Straw gypsum composite board is made by 90～110 parts gypsum, 10～20 parts crushed aggregates of straw, 20～40 parts water and 0.04～0.06 part citric acid solution by ratio of weight and the number of copies; Wherein the mass concentration of citric acid solution is 40%～50%.
The method for preparing straw gypsum composite board realizes according to the following steps: one, will cross 20～40 purpose sieves after straw cutting, pulverizing, the removal of impurity, and get crushed aggregates of straw; Two, take by weighing 90～110 parts gypsum, 10～20 parts crushed aggregates of straw, 20～40 parts water and 0.04～0.06 part citric acid solution by ratio of weight and the number of copies; Three, crushed aggregates of straw is put into boiling water 2～3h, is taken out dry back and the gypsum uniform mixing that takes by weighing, add the water that takes by weighing and citric acid solution uniform mixing more then, mixture; Four, mixture is mated formation into slab, under the pressure of 2～4MPa, suppresses 2～4min then, placing hot-pressing processing 3～5h under 70～90 ℃, the condition of 10～14MPa, sheet material; Five, gained sheet material is placed on health 22～26h under the room temperature condition, placing then and being dried to the sheet material water ratio under 100～104 ℃ the condition is 2%～3%, promptly gets straw gypsum composite board; Wherein the mass concentration of citric acid solution is 40%～50%.
The present invention utilizes gypsum and straw for the materials for wall of feedstock production, compares formaldehydeless pollution with ordinary particle board, saves wood material, but also utilization of waste material; Resulting product has higher intensity and resistance to flame among the present invention, but mechanical workout, the Application in Building excellent property, the sound absorption heat-proof quality is better, and MOR is 6.5～6.9MPa, and Young's modulus is 2000.8～2031.9MPa, internal bond strength is 0.2～0.4MPa, and density is 1.0～1.3g/cm
3, the mechanical property excellence of straw gypsum composite board, use properties is strong, and technology is simple, does not use sizing agent, and production cost is low, is suitable as the environment-friendly energy-saving building and ornament materials and promotes the use of, and has good economic and social benefit.
Embodiment
Embodiment one: the present embodiment straw gypsum composite board is made by 90～110 parts gypsum, 10～20 parts crushed aggregates of straw, 20～40 parts water and 0.04～0.06 part citric acid solution by ratio of weight and the number of copies; Wherein the mass concentration of citric acid solution is 40%～50%.
Embodiment two: what present embodiment and embodiment one were different is that straw gypsum composite board is made by 100 parts gypsum, 15 parts crushed aggregates of straw, 30 parts water and 0.05 part citric acid solution by ratio of weight and the number of copies; Wherein the mass concentration of citric acid solution is 45%.Other step and parameter are identical with embodiment one.
Embodiment three: the method that present embodiment prepares straw gypsum composite board realizes according to the following steps: one, will cross 20～40 purpose sieves after straw cutting, pulverizing, the removal of impurity, and get crushed aggregates of straw; Two, take by weighing 90～110 parts gypsum, 10～20 parts crushed aggregates of straw, 20～40 parts water and 0.04～0.06 part citric acid solution by ratio of weight and the number of copies; Three, crushed aggregates of straw is put into boiling water 2～3h, is taken out dry back and the gypsum uniform mixing that takes by weighing, add the water that takes by weighing and citric acid solution uniform mixing more then, mixture; Four, mixture is mated formation into slab, under the pressure of 2～4MPa, suppresses 2～4min then, placing hot-pressing processing 3～5h under 70～90 ℃, the condition of 10～14MPa, sheet material; Five, gained sheet material is placed on health 22～26h under the room temperature condition, placing then and being dried to the sheet material water ratio under 100～104 ℃ the condition is 2%～3%, promptly gets straw gypsum composite board; Wherein the mass concentration of citric acid solution is 40%～50%.
Embodiment four: what present embodiment and embodiment three were different is to take by weighing 100 parts gypsum, 15 parts crushed aggregates of straw, 30 parts water and 0.05 part citric acid solution in the step 2 by ratio of weight and the number of copies.Other step and parameter are identical with embodiment three.
Embodiment five: present embodiment and embodiment three are different is in the step 3 crushed aggregates of straw to be put into boiling water 2.5h.Other step and parameter are identical with embodiment three.
Putting into the purpose that boiling water handles in the present embodiment is to reduce to influence the sheet material solidified material.
Embodiment six: what present embodiment and embodiment three were different is in the step 4 mixture to be mated formation into slab, suppresses 3min then under the pressure of 3MPa, is placing hot-pressing processing 4h under 80 ℃, the condition of 12MPa.Other step and parameter are identical with embodiment three.
Embodiment seven: what present embodiment and embodiment three were different is in the step 5 gained sheet material to be placed on health 24h under the room temperature condition, and placing then and being dried to the sheet material water ratio under 102 ℃ the condition is 2.5%.Other step and parameter are identical with embodiment three.
Embodiment eight: the method that present embodiment prepares straw gypsum composite board realizes according to the following steps: one, will cross 30 purpose sieves after straw cutting, pulverizing, the removal of impurity, and get crushed aggregates of straw; Two, take by weighing 100 parts gypsum, 15 parts crushed aggregates of straw, 30 parts water and 0.05 part citric acid solution by ratio of weight and the number of copies; Three, crushed aggregates of straw is put into boiling water 3h, is taken out dry back and the gypsum uniform mixing that takes by weighing, add the water that takes by weighing and citric acid solution uniform mixing more then, mixture; Four, mixture is mated formation into slab, under the pressure of 3MPa, suppresses 3min then, placing hot-pressing processing 4h under 80 ℃, the condition of 12MPa, sheet material; Five, gained sheet material is placed on health 24h under the room temperature condition, placing then and being dried to the sheet material water ratio under 102 ℃ the condition is 2.27%, promptly gets straw gypsum composite board; Wherein the mass concentration of citric acid solution is 45%.
Gained straw gypsum composite board in the present embodiment, MOR is 6.8MPa after tested, and Young's modulus is 2031.78MPa, and internal bond strength is 0.3MPa, and density is 1.2g/cm
3, water ratio is 2.27%, the mechanical property excellence of gained straw gypsum composite board, and intensity height, resistance to flame are good.
Claims (7)
1, a kind of straw gypsum composite board is characterized in that straw gypsum composite board made by 90～110 parts gypsum, 10～20 parts crushed aggregates of straw, 20～40 parts water and 0.04～0.06 part citric acid solution by ratio of weight and the number of copies; Wherein the mass concentration of citric acid solution is 40%～50%.
2, a kind of straw gypsum composite board according to claim 1 is characterized in that straw gypsum composite board made by 100 parts gypsum, 15 parts crushed aggregates of straw, 30 parts water and 0.05 part citric acid solution by ratio of weight and the number of copies; Wherein the mass concentration of citric acid solution is 45%.
3, the method for preparing the described straw gypsum composite board of claim 1 is characterized in that the method for preparing straw gypsum composite board realizes according to the following steps: one, will cross 20～40 purpose sieves after straw cutting, pulverizing, the removal of impurity, and get crushed aggregates of straw; Two, take by weighing 90～110 parts gypsum, 10～20 parts crushed aggregates of straw, 20～40 parts water and 0.04～0.06 part citric acid solution by ratio of weight and the number of copies; Three, crushed aggregates of straw is put into boiling water 2～3h, is taken out dry back and the gypsum uniform mixing that takes by weighing, add the water that takes by weighing and citric acid solution uniform mixing more then, mixture; Four, mixture is mated formation into slab, under the pressure of 2～4MPa, suppresses 2～4min then, placing hot-pressing processing 3～5h under 70～90 ℃, the condition of 10～14MPa, sheet material; Five, gained sheet material is placed on health 22～26h under the room temperature condition, placing then and being dried to the sheet material water ratio under 100～104 ℃ the condition is 2%～3%, promptly gets straw gypsum composite board; Wherein the mass concentration of citric acid solution is 40%～50%.
4, the method for preparing straw gypsum composite board according to claim 3 is characterized in that taking by weighing by ratio of weight and the number of copies in the step 2 100 parts gypsum, 15 parts crushed aggregates of straw, 30 parts water and 0.05 part citric acid solution.
5, the method for preparing straw gypsum composite board according to claim 3 is characterized in that in the step 3 crushed aggregates of straw put into boiling water 2.5h.
6, the method for preparing straw gypsum composite board according to claim 3 is characterized in that in the step 4 mixture being mated formation into slab, suppresses 3min then under the pressure of 3MPa, is placing hot-pressing processing 4h under 80 ℃, the condition of 12MPa.
7, the method for preparing straw gypsum composite board according to claim 3 is characterized in that in the step 5 gained sheet material being placed on health 24h under the room temperature condition, and placing then and being dried to the sheet material water ratio under 102 ℃ the condition is 2.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810136954XA CN101343168A (en) | 2008-08-18 | 2008-08-18 | Straw gypsum composite board and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810136954XA CN101343168A (en) | 2008-08-18 | 2008-08-18 | Straw gypsum composite board and preparation thereof |
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| Publication Number | Publication Date |
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| CN101343168A true CN101343168A (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200810136954XA Pending CN101343168A (en) | 2008-08-18 | 2008-08-18 | Straw gypsum composite board and preparation thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529298A (en) * | 2014-12-22 | 2015-04-22 | 吴庆定 | Catalpa tea table and production method thereof |
| CN107337418A (en) * | 2017-07-19 | 2017-11-10 | 山西大美至善石膏设备股份有限公司 | A kind of gypsum board capable of replacing wood board and preparation method thereof |
| CN108724382A (en) * | 2018-08-29 | 2018-11-02 | 南京工业大学 | Wood-based gypsum composite material for structure and preparation method thereof |
-
2008
- 2008-08-18 CN CNA200810136954XA patent/CN101343168A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104529298A (en) * | 2014-12-22 | 2015-04-22 | 吴庆定 | Catalpa tea table and production method thereof |
| CN104529298B (en) * | 2014-12-22 | 2016-06-08 | 吴庆定 | A kind of Lignum catalpae ovatae Tea Service and preparation method thereof |
| CN107337418A (en) * | 2017-07-19 | 2017-11-10 | 山西大美至善石膏设备股份有限公司 | A kind of gypsum board capable of replacing wood board and preparation method thereof |
| CN107337418B (en) * | 2017-07-19 | 2020-09-22 | 山西大美至善石膏设备股份有限公司 | Gypsum board substitute and preparation method thereof |
| CN108724382A (en) * | 2018-08-29 | 2018-11-02 | 南京工业大学 | Wood-based gypsum composite material for structure and preparation method thereof |
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Open date: 20090114 |