CN104478382A - Light-weight reinforced gypsum plaster board and preparation method thereof - Google Patents
Light-weight reinforced gypsum plaster board and preparation method thereof Download PDFInfo
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- CN104478382A CN104478382A CN201410664054.8A CN201410664054A CN104478382A CN 104478382 A CN104478382 A CN 104478382A CN 201410664054 A CN201410664054 A CN 201410664054A CN 104478382 A CN104478382 A CN 104478382A
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- 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
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to a light-weight reinforced gypsum plaster board and a preparation method thereof. The light-weight reinforced gypsum plaster board is prepared from the following raw materials in parts by weight: 100 parts of a gypsum clinker, 0.1-1 part of modified starch, 0.01-0.1 part of a foaming agent, 2-10 parts of rice straw fiber powder, 0.1-0.6 part of CMC (carboxyl methy cellulose) powder and 50-100 parts of water. By adding the rice straw fiber powder and the CMC powder, the workability of slurry is improved, the problems of low grade and low strength of desulfurization gypsum are solved, and particularly the rice straw fiber powder has an adsorption effect on Cl, so that the wetting bond quality of the gypsum plaster board is greatly improved; meanwhile, the consumption of the desulfurization gypsum and the foaming agent is reduced, and the strength and bond performance of the board are improved; the prepared gypsum plaster board is good in wetting bond performance, the mass per unit area of a 9.5mm waterproof board is 6.4kg/m<2> which is far superior to a national standard requirement that the mass per unit area is not less than 9.5kg/m<2>; and the average value of the transverse breaking load is 216.5N, the minimum value of the transverse breaking load is 202.6, the average value of the longitudinal breaking load is 448.0N, the minimum value of the longitudinal breaking load is 423.8N, and the strength is far higher than a national standard requirement.
Description
Technical field
The present invention relates to a kind of gypsum for building plate, specifically, relate to a kind of lightweight and strengthen Thistle board and preparation method thereof.
Background technology
Desulfurated plaster is the byproduct of power plant desulfurization industry, is also the main raw material producing plasterboard at present.But a domestic desulfurated plaster ubiquity centralized particle diameter, grade is low, the situation that detrimental impurity is high, cause finish mix slurry workability and poor water retention property in gypsum board manufacturing process, add the control difficulty of gypsum board manufacture technique, also had a strong impact on Paper-faced gyp slab products intensity and bond quality.The measure that current domestic gypsum board production line addresses this problem mostly is increases sheet material mass area ratio, and this not only causes the waste of resource, and makes plasterboard be not easy to carrying and construction, adds production, transport and construction cost.
Rice straw is one of Main By product of agriculture production, present stage, and straw is mainly used in animal feed and cooking stove and burns bavin and use, and annual backlog is comparatively large, land occupation, waste resource and contaminate environment.
Rice straw because of the present circumstance, is used as the strongthener that preparation lightweight strengthens Thistle board, solves the intensity of desulfurated plaster slab products and a difficult problem for bond quality difference simultaneously, reach efficent use of resources and cost-saving object by contriver.
Summary of the invention
The object of this invention is to provide a kind of lightweight and strengthen Thistle board and preparation method thereof.
Lightweight of the present invention strengthens Thistle board, and comprise the plasterboard between two-layer mask paper and two-layer mask paper, described plasterboard is made up of the raw material of following parts by weight: gypsum grog: 100 parts; Treated starch: 0.1-1 part; Whipping agent: 0.01-0.1 part; Straw fibers powder: 2-10 part; CMC powder: 0.1-0.6 part; Water: 50-100 part.
Preferably, described plasterboard is made up of the raw material of following weight fraction: gypsum grog: 100 parts; Treated starch: 0.2-0.6 part; Whipping agent: 0.01-0.05 part; Straw fibers powder: 5-8 part; CMC powder: 0.1-0.4 part; Water: 60-80 part.
Preferred, described plasterboard is made up of the raw material of following weight fraction: gypsum grog: 100 parts; Treated starch: 0.5 part; Whipping agent: 0.04 part; Straw fibers powder: 8 parts; CMC powder: 0.2 part; Water: 75 parts.
Wherein, described gypsum grog is made up of desulfurated plaster, the described method making grog can adopt the conventional method in this area to carry out, in the present invention, a kind of method desulfurated plaster being made gypsum grog of special proposition, by desulfurated plaster frying in hammer beater, sloughing that whole attached water and partial crystallization water obtains with semi-hydrated gypsum is the gesso of main component, enter the modification of ball mill grinding, obtained gypsum grog.
The intensity of plasterboard is mainly derived from the intensity that gypsum grog produces after hydration and hardening.
Treated starch be native starch through suitable chemical treatment, introduce some chemical group and molecular structure and physico-chemical property changed, generate starch derivative.The present invention adopts modified corn starch, and its gelatinization point is 70-75 DEG C, and treated starch can migrate to mask paper and gypsum core contact layer after Heat Gelatinization, and mask paper and gypsum core are bonded together firmly.
Straw fibers powder is the powder will obtained after rice straw pulverization process, adopt in the present invention and be crushed to 30-70 object straw, facts have proved, this straw fibers powder can Some substitute whipping agent, intensity and the toughness of sheet material can be strengthened, thus reduce the substance of sheet material; Also adsorption is played to detrimental impurity chlorine root in gypsum, effectively can prevent making moist or de-paper of sheet material.
CMC powder is carboxymethyl cellulose powder, and its Main Function is water-keeping thickening, effectively can prevent the layering of slip bleeding, have the effect of binding agent, can improve the adhesive property of mask paper and gypsum core.
The Main Function of whipping agent makes plate in-core be uniformly distributed pore, reduces plasterboard mass area ratio; Water is the required material of gypsum aquation, and in preparation process, water and whipping agent mixed diluting are used for, for plasterboard foams, carrying out α-TCP bone cement to the plaster of Paris.
Lightweight of the present invention strengthens the method that Thistle board can adopt this area conventional, and especially, the present invention also provides above-mentioned lightweight to strengthen the preparation method of Thistle board.
Lightweight of the present invention strengthens the preparation method of Thistle board, comprises the following steps:
1) gypsum grog and straw fibers powder are added after mixing reamer fully mixes and enter stirrer, then CMC powder and treated starch are added stirrer successively, continue to stir;
2) whipping agent mixes with part water, and the weight of whipping agent is 1.2% of the weight of water, and foaming agent solution foams through foamed system, then also enters stirrer;
3) raw material fully stirs in stirrer, obtained distributed slurry, and continuous pouring, between two-layer cardboard, obtains plasterboard wet plate through extrusion molding;
4) plasterboard wet plate through solidifying, cutting off, behind dry, saw limit obtained Paper-faced gyp board finished product.
In described preparation method, the reamer that described mixing reamer can adopt this area conventional, the stirrer that described stirrer can select this area conventional; The foamed system that described foamed system also can adopt ability conventional.
Step 1) in, first gypsum grog and straw fibers powder are mixed, wild phase can be made to be evenly distributed in gypsum grog, add the mixture of treated starch and CMC powder subsequently, the Homogeneous phase mixing of these two kinds of mixtures can strengthen adhesiveproperties, makes the uniform intensity of plasterboard goods better.
Adopt above-mentioned formula and preparation method, obtained Thistle board adhesive property meets national standard requirement, and bonding of making moist is better than common paper surface gypsum board; The thick water-fast plate mass area ratio 6.4kg/ ㎡ of 9.5mm, is far superior to the national standard requirement that mass area ratio is not more than 9.5kg/ ㎡; Transverse breakage load mean value 216.5N, minimum value 202.6N, longitudinal fracture load mean value 448.0N, minimum value 423.8N, intensity is far above national standard requirement.All the other indices all meet national standard requirement.
Along with adding of straw fibers powder and CMC powder, improve slip workability, solve the problem that desulfurated plaster grade low strength is low, special straw fibers powder (migrates to mask paper and gypsum core contact layer in wet condition to chlorine root, generation is saltoutd and is returned white phenomenon, the bonding of salt-pepper noise expansion effects mask paper) there is adsorption, substantially improve Thistle board and to make moist bond quality.Reduce the consumption of desulfurated plaster and whipping agent, improve intensity and the adhesive property of sheet material, achieve effective utilization of resource, saved production cost.
Accompanying drawing explanation
Fig. 1 is preparation method's flow process that lightweight of the present invention strengthens Thistle board.
Embodiment
Described embodiment is in order to the present invention is described, but is not used in restriction the present invention scope required for protection.As do not specialized, described raw material is all the raw material that this area is commonly used, the equipment that described equipment adopts this area conventional.
Wherein, described gypsum grog is by power plant desulfurization industrial by-product---desulfurated plaster (grade >=90%, chlorine root≤300ppm) make, by desulfurated plaster frying in hammer beater, sloughing that whole attached water and partial crystallization water obtains with semi-hydrated gypsum is the gesso of main component, enter the modification of ball mill grinding, obtained gypsum grog.The physical properties of the plaster of Paris obtained is as follows: specific surface area 3500-4000cm
2/ g, crystal water 5.0-5.5%, initial set 1 '-1 ' 30 ", final set 3 ' 30 "-5 '.
Treated starch is modified corn starch, gelatinization point 70-75 DEG C, alkaline degree of mobilization 14-20 second (after evaluation gelatinization, the index of viscosity, affects adhesive property and travelling speed); Producer: Shenyang snow is public.
Whipping agent is: make plate in-core be uniformly distributed pore, reduces plasterboard mass area ratio, sodium lauryl sulphate based surfactants, composite water, frostproofer, stablizer etc., producer: Zibo is all entered.
Straw fibers powder is: straw is crushed to 30-70 order, Substitute For Partial whipping agent, and reduce sheet material substance, activeness and quietness, plays adsorption to detrimental impurity chlorine root in gypsum, can effectively prevent sheet material to make moist de-paper.
CMC powder is: carboxymethyl cellulose powder, soluble in water, and property becomes thick-pasty colloid, plays the effect of water-keeping thickening, prevents the layering of slip bleeding, has the effect of binding agent, improves the adhesive property of mask paper and gypsum core.
The paper that described paper selects this area conventional, what the present embodiment was selected is the common mask paper of Shandong Bo Hui: paper grammes per square metre 160g/m in model
2, width 1178mm, lower paper 180,1245 (grammes per square metre g/m
2, width mm).
Embodiment 1
Each raw material is taken: gypsum grog: 100 parts by following portions by weight; Treated starch: 1 part; Whipping agent: 0.1 part; Straw fibers powder: 8 parts; CMC powder: 0.5 part; Water: 80 parts.
Prepare lightweight as follows and strengthen Thistle board:
1) gypsum grog and straw fibers powder are added after mixing reamer fully mixes and enter stirrer, then CMC powder and treated starch are added stirrer successively, continue to stir;
2) whipping agent mixes with part water, and the weight of whipping agent is 1.2% of the weight of water, and foaming agent solution foams through foamed system, then also enters stirrer;
3) raw material fully stirs in stirrer, obtained distributed slurry, and continuous pouring, between two-layer cardboard, obtains plasterboard wet plate through extrusion molding;
4) plasterboard wet plate through solidifying, cutting off, behind dry, saw limit obtained Paper-faced gyp board finished product.
Embodiment 2
Each raw material is taken: gypsum grog: 100 parts by following portions by weight; Treated starch: 0.2 part; Whipping agent: 0.02 part; Straw fibers powder: 5 parts; CMC powder: 0.1 part; Water: 60 parts.
Prepare lightweight as follows and strengthen Thistle board:
1) gypsum grog and straw fibers powder are added after mixing reamer fully mixes and enter stirrer, then CMC powder and treated starch are added stirrer successively, continue to stir;
2) whipping agent mixes with part water, and the weight of whipping agent is 1.2% of the weight of water, and foaming agent solution foams through foamed system, then also enters stirrer;
3) raw material fully stirs in stirrer, obtained distributed slurry, and continuous pouring, between two-layer cardboard, obtains plasterboard wet plate through extrusion molding;
4) plasterboard wet plate through solidifying, cutting off, behind dry, saw limit obtained Paper-faced gyp board finished product.
Embodiment 3
Each raw material is taken: gypsum grog: 100 parts by following portions by weight; Treated starch: 0.5 part; Whipping agent: 0.04 part; Straw fibers powder: 8 parts; CMC powder: 0.2 part; Water: 75 parts.
Prepare lightweight as follows and strengthen Thistle board:
1) gypsum grog and straw fibers powder are added after mixing reamer fully mixes and enter stirrer, then CMC powder and treated starch are added stirrer successively, continue to stir;
2) whipping agent mixes with part water, and the weight of whipping agent is 1.2% of the weight of water, and foaming agent solution foams through foamed system, then also enters stirrer;
3) raw material fully stirs in stirrer, obtained distributed slurry, and continuous pouring, between two-layer cardboard, obtains plasterboard wet plate through extrusion molding;
4) plasterboard wet plate through solidifying, cutting off, behind dry, saw limit obtained Paper-faced gyp board finished product.
The properties of plasterboard prepared by embodiment 1-3 is in table 1:
The performance of plasterboard prepared by table 1 embodiment 1-3
Along with adding of straw fibers powder and CMC powder, improve slip workability, solve the problem that desulfurated plaster grade low strength is low, special straw fibers powder (migrates to mask paper and gypsum core contact layer in wet condition to chlorine root, generation is saltoutd and is returned white phenomenon, the bonding of salt-pepper noise expansion effects mask paper) there is adsorption, substantially improve Thistle board and to make moist bond quality.Reduce the consumption of desulfurated plaster and whipping agent, improve intensity and the adhesive property of sheet material, achieve effective utilization of resource, saved production cost.
The performance of existing market circulation 9.5mm thick common paper surface gypsum board is as follows: mass area ratio 7.0kg/ about ㎡, horizontal mean value about the 185N of breaking load, about minimum value 160N, longitudinal mean value about 420N, about minimum value 380N, adhesive property has individually gypsum core exposed, seamed edge about hardness 75N, termination hardness about 90, there is crackle at the indivedual back side of shock resistance.Compare with existing Thistle board, the adhesive property that makes moist of the Thistle board of greatest service of the present invention improves greatly with amount of deflection of making moist, to make moist amount of deflection detection method by GB/T9775-2008 Thistle board, maintenance is carried out to sheet material and detects make moist amount of deflection and bonding of making moist: the present invention produces Thistle board, make moist amount of deflection 3mm, the adhesive property that makes moist is better, and gypsum core is not exposed; The general Thistle board in market makes moist amount of deflection at about 15mm, and bonding of making moist is poor, and gypsum core has over half exposed.
Claims (6)
1. lightweight strengthens a Thistle board, and comprise the plasterboard between two-layer mask paper and two-layer mask paper, it is characterized in that, described plasterboard is made up of the raw material of following parts by weight: gypsum grog: 100 parts; Treated starch: 0.1-1 part; Whipping agent: 0.01-0.1 part; Straw fibers powder: 2-10 part; CMC powder: 0.1-0.6 part; Water: 50-100 part.
2. plasterboard as claimed in claim 1, it is characterized in that, described plasterboard is made up of the raw material of following weight fraction: gypsum grog: 100 parts; Treated starch: 0.2-.6 part; Whipping agent: 0.01-0.05 part; Straw fibers powder: 5-8 part; CMC powder: 0.1-0.4 part; Water: 60-80 part.
3. plasterboard as claimed in claim 1 or 2, it is characterized in that, described plasterboard is made up of the raw material of following weight fraction: gypsum grog: 100 parts; Treated starch: 0.5 part; Whipping agent: 0.04 part; Straw fibers powder: 8 parts; CMC powder: 0.2 part; Water: 75 parts.
4. the plasterboard as described in as arbitrary in claim 1-3, it is characterized in that, described gypsum grog is made up of desulfurated plaster.
5. the plasterboard as described in as arbitrary in claim 1-3, it is characterized in that, described straw fibers powder is the powder obtained after pulverization process by rice straw, and its granularity is 30-70 order.
6. the lightweight as described in as arbitrary in claim 1-5 strengthens the preparation method of Thistle board, it is characterized in that, comprises the following steps:
1) gypsum grog and straw fibers powder are added after mixing reamer fully mixes and enter stirrer, then also enter stirrer by after treated starch and the mixing of CMC powder, continue to stir;
2) whipping agent mixes with part water, and the weight of whipping agent is 1.2% of the weight of water, and foaming agent solution foams through foamed system, then also enters stirrer;
3) raw material fully stirs in stirrer, obtained distributed slurry, and continuous pouring, between two-layer cardboard, obtains plasterboard wet plate through extrusion molding;
4) plasterboard wet plate through solidifying, cutting off, behind dry, saw limit obtained Paper-faced gyp board finished product.
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| CN105272109A (en) * | 2015-10-26 | 2016-01-27 | 圣戈班石膏建材（常州）有限公司 | Super-light gypsum board with honeycomb foam core structure and preparation method of super-light gypsum board |
| CN105399395A (en) * | 2015-12-09 | 2016-03-16 | 文登蓝岛建筑工程有限公司 | Gypsum board with air purification function and preparation method thereof |
| CN106003400A (en) * | 2016-05-23 | 2016-10-12 | 北新集团建材股份有限公司 | Gypsum slurry thickness fine regulation system and method |
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