CN109206108A - A kind of scratch coat gypsum and preparation method thereof - Google Patents

A kind of scratch coat gypsum and preparation method thereof Download PDF

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Publication number
CN109206108A
CN109206108A CN201710530228.5A CN201710530228A CN109206108A CN 109206108 A CN109206108 A CN 109206108A CN 201710530228 A CN201710530228 A CN 201710530228A CN 109206108 A CN109206108 A CN 109206108A
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China
Prior art keywords
plastering gupsum
parts
water
gypsum
bottom degree
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CN201710530228.5A
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Chinese (zh)
Inventor
焦子宾
王珂
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Changge Hi Tech New Building Material Technology Co Ltd
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Changge Hi Tech New Building Material Technology Co Ltd
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Priority to CN201710530228.5A priority Critical patent/CN109206108A/en
Publication of CN109206108A publication Critical patent/CN109206108A/en
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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482Coating or impregnation materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

A kind of bottom degree plastering gupsum, it is made of the raw material of following parts by weight: 30-50 parts of building gypsum, 45-65 parts of quartz sand, 0.2-0.5 part of retarder, 1.5-2.5 parts of water-retaining agent, 0.3-0.5 part of starch ether, 0.2-0.5 part of tackifier, 20-30 parts of water.A kind of preparation method of bottom degree plastering gupsum is: weighing raw material according to above-mentioned formula, is placed in blender after raw material is mixed, start blender, stirs 2 minutes, mix mixture with water substantially uniformity.By adding different component and adjusting the content of component, the cohesive force for making plastering gupsum have good water-retaining property and various bases is strong, it is easy for construction, laborsaving when section, the intensity of plastering gupsum especially of the invention is high, greatly ensure that the construction quality of interior decoration plaster leveling.

Description

A kind of scratch coat gypsum and preparation method thereof
Technical field
The present invention relates to building material technical fields, and in particular to a kind of scratch coat gypsum and preparation method thereof.
Background technique
Plastering gupsum is that sand, certain admixture and special compound additive is added using gypsum as major gelled material The one kind being processed into energy-efficient inner wall of building and ceiling plastering material are widely used in the levelling and dress of interior wall and top plate Decorations.In modern construction engineering, plastering gupsum mainly substitutes the plastering materials such as cement, lime mortar and clay class mortar, fits For various walls.Compared with other plastering mortars, plastering gupsum has good workability, mobility and water retention property, good Good insulation and sound-proofing, fire protecting performance appropriate, metope densification is smooth, can adjust with any substrate bonding Indoor humidity, and not limited by thickness is a kind of material property, workability and uses the levelling material of the good wall plastering of function Material is widely used in industry and civil buildings.
Plastering gupsum in practical applications it sometimes appear that hollowing, intensity it is low, picking and other issues, odjective cause is as follows: 1) Base is dry, and absorption speed is fast, causes plastering gupsum dehydration fast, and building gypsum does not have complete aquation to form dihydrate gypsum crystal;
2) summer temperature is high, and dihydrate gypsum degree of supersaturation is low, and Crystallization speed is slow, and plastering gupsum setting time is long;
3) construction site temperature is high, wind speed is big, the rapid surface drying in plastering gupsum surface;
4) the mix amount that plastering gupsum is not determined according to construction speed, staffing, the plastering gupsum initial set mixed After add water stirring after continue to use, cause coat of plaster there is no intensity;
5) when winter construction, construction environment temperature is low, and one side building gypsum solution rate is slow, causes gypsum speed slow; On the other hand plastering gupsum slurry is endured cold upon hardening after constructing, and the water in the concrement of plastering gupsum freezes into ice, is destroyed solidifying The structure of solid.
6) with the raising of construction industry level, the appearance of novel wall material, such as air entrained concrete brick, building block composition Base's water absorption rate is large and fast.
The intensity difference of domestic plastering gupsum is larger, generates picking sometimes or even intensity is too low to conduct Brushing architectural decoration coating material and the base for pasting rich and varied wallpaper.By low intensive plastering in family's Decorating Project Gypsum shovel falls, and waste of manpower and time generate dust and building waste, pollutes environment.
Following factor will affect the intensity of plastering gupsum: 1) quality of building gypsum, including phase composition, granular size, shape Shape and distribution, specific surface area, dopant species and content;2) ingredient of plastering gupsum, (retarder, efficiently surpasses water-retaining agent additive Plasticiser etc.) type and dosage, granular size, shape, distribution and the dosage of quartz sand;3) plastering gupsum standard extension degree Water consumption etc..
The raw material of plastering gupsum are used by the preparation of natural or desulphurization gypsum calcination with β-half water stone currently on the market Building gypsum based on cream phase.Remaining dihydrate gypsum plays the work of nucleus in the hydration process of building gypsum in building gypsum With can promote the aquation of building gypsum, shorten setting time.When the content of dihydrate gypsum in building gypsum is greater than 3%, meeting The water consumption for increasing building gypsum, is greatly lowered the intensity of plastering gupsum;On the other hand, since the presence of dihydrate gypsum is shortened Its setting time needs to be added more retarder to extend the setting time of building gypsum, provides abundant behaviour for its construction Make the time.The addition of any retarder can more or less reduce the intensity of building gypsum.Therefore it is forged natural or desulfurized gypsum During burning, the general principle using " peaceful mistake is not owed " avoids the presence of dihydrate gypsum in building gypsum, but brings building again A large amount of presence of anhydrous gypsum in gypsum.
At present in China's gypsum industry, the characteristics of due to calcining equipment and calcine technology, the paring stone actually calcining out Often there is certain burning product, i.e. soluble anhydrite in cream, or is type III anhydrous gypsum.Type III anhydrous gypsum Hydration rate be higher than β-semi-hydrated gypsum, aquation formed dihydrate gypsum crystal in can include unhydrated β-semi-hydrated gypsum.Two Water gypsum crystal irregular structure, it is not fine and close.In the later period of plastering gupsum aquation, in water or moisture meeting and dihydrate gypsum crystal β-semi-hydrated gypsum reacts to form dihydrate gypsum, and newly-generated dihydrate gypsum crystal destroys the knot of original dihydrate gypsum crystal Structure, so as to cause the reduction of plastering gupsum intensity.It is aged naturally by one of time, the anhydrous stone of the type III in building gypsum Cream can absorb the moisture in air and gradually be changed into β-semi-hydrated gypsum naturally, while the grain shape of building gypsum can become to advise It is whole, cause the water requirement of plastering gupsum to gradually decrease, compression strength is increased, and the performance of last building gypsum not only tends to be steady Determine and tends to optimize.
Therefore, the intensity of plastering gupsum can generally be improved using different aging, the common side of ageing of building gypsum Formula has mechanical ageing method and natural ageing method.The digestion time of mechanical ageing method is short, and effect is good.German gypsum calcining equipment supply Quotient Claudius Peter company releases a kind of device of acceleration gypsum ageing, and the basic technology of aging device is will be just burned Gypsum is imported into a cylindrical ageing cylinder by air-flow, and the humidity that digestion tank needs is determined by the phase composition of calcined gypsum, (155 DEG C or so) of hot-air with certain humidity are provided into digestion tank, and the land plaster calcined is in the hot-air for having humidity Form suspended state under effect, and can sufficiently be reacted with the moisture in air, it is this under the conditions of type III anhydrous gypsum can be fast Speed is converted into β-semi-hydrated gypsum, and β-semi-hydrated gypsum seldom participates in hydration reaction, and the dihydrate gypsum of underburnt also can be at high temperature It is changed into β-semi-hydrated gypsum, and then achievees the purpose that promoting ageing.Since type III anhydrous gypsum is converted into β-semi-hydrated gypsum first Occur inside the crack of anhydrous gypsum, and then reduce the specific surface area of land plaster by 22-42%, the phase composition of gypsum and compares table The change of area eventually leads to that the gypsum water requirement after ageing reduces and intensity greatly improves.But equipment investment and energy It consumes relatively high, for the manufacturer of plastering gupsum, since the total output of plastering gupsum is smaller, uses the amount of building gypsum Small, the equipment that a set of mechanical ageing building gypsum is built in investment is worthless for output ratio.
Another method is nature ageing method, i.e., is aged building gypsum using natural conditions.In natural ageing process In, bed of material accumulation cannot be too thick, otherwise air unsmooth flowing, and the moisture in air acts on insufficient with building gypsum, it is difficult to make The phase transition process of building gypsum tends towards stability.Actually ageing cannot achieve for the manufacturer of plastering gupsum naturally. Although the output of plastering gupsum is little, also there is 100~200 tons of building gypsum dosage daily, and building gypsum is in production vehicle Between time for being aged naturally be at least 10 days, it is therefore desirable to one nearly 1500 tons of natural ageing space, this is plastering gupsum What manufacturer can not accomplish.The so more dry pulverulent materials of processing simultaneously will cause fugitive dust and environmental pollution, influence to operate The health of person.
Summary of the invention
The purpose of the present invention is overcoming above-mentioned technical deficiency, a kind of bottom degree plastering gupsum and preparation method thereof is provided, It makes plastering gupsum have good water-retaining property and various bases by adding different component and adjust the content of component Cohesive force is strong, easy for construction, and when section is laborsaving, and the intensity of plastering gupsum especially of the invention is high, greatly ensure that interior decoration The construction quality of plaster leveling.
The present invention to achieve the above object the technical solution adopted is that: a kind of bottom degree plastering gupsum, it is by following heavy Measure the raw material composition of part: 30-50 parts of building gypsum, 45-65 parts of quartz sand, 0.2-0.5 part of retarder, water-retaining agent 1.5- 2.5 parts, 0.3-0.5 part of starch ether, 0.2-0.5 part of tackifier, 20-30 parts of water.
Preferably, a kind of bottom degree plastering gupsum, it is made of the raw material of following parts by weight: building gypsum 45 parts, 55 parts of quartz sand, 0.4 part of retarder, 2.0 parts of water-retaining agent, 0.4 part of starch ether, 0.3 part of tackifier, 25 parts of water.
Preferably, the retarder is the Plast Retard PE retarder of 2000 company of SICIT of Italy production, is in Ivory white powder.
Preferably, the quartz sand is the river sand of fineness modulus 1.8-2.5.
Preferably, β-semi-hydrated gypsum content is 45% or more in the building gypsum.
Preferably, the building gypsum fineness is 70~90 mesh.
Preferably, the water-retaining agent is the hydroxypropyl methyl cellulose ether that viscosity is 40000~100000mPa.s.
Preferably, the tackifier are made of re-dispersible glue powder, the polymer type of the re-dispersible glue powder Selected from polyvinyl acetate, pure acrylate, copolymer in cinnamic acrylic ester, vinyl chloride-ethylene copolymer, vinyl acetate One of ester-ethylene copolymer and vinylacetate-ethylene-vinyl versatate copolymer are a variety of.
It is furthermore preferred that the glass transition temperature of the polymer of the re-dispersible glue powder is preferably 14 DEG C~18 DEG C of acetic acid Vinyl acetate-ethylene copolymer.
A kind of preparation method of bottom degree plastering gupsum is: weighing raw material according to above-mentioned formula, raw material is mixed It is placed in blender afterwards, starts blender, stir 2 minutes, mix mixture with water substantially uniformity.
The beneficial effects of the present invention are: by adding different component and adjusting the content of component, have plastering gupsum Have good water-retaining property and the cohesive force of various bases strong, it is easy for construction, when section laborsaving, especially of the invention plastering gupsum Intensity it is high, greatly ensure that the construction quality of interior decoration plaster leveling.The setting time of plastering gupsum prepared by the present invention, The regulation of compression strength, flexural strength, adhesion strength GB/T28627-2012 " plastering gupsum " according to national standards are tested. As a result it indicates, plastering gupsum intensity of the present invention is high, and strong with the cohesive force of base, pressure-proof and snap-resistent intensity is high, properties Meet the prescribed requirement of bottom plastering gupsum in standard GB/T/T28627-2012 " plastering gupsum ".
Specific embodiment
The present invention is further illustrated below by way of specific example.But the detail of example is only limitted to explain the present invention, no It is interpreted as the restriction to technical solution of the present invention.
Example 1
Formula: building gypsum 350g, quartz sand 650g, water-retaining agent 1.5g, retarder 0.4g, starch ether 0.3g, tackifier 0.2g, Water 250g.
Preparation step:
(1) first by retarder, starch ether, cellulose ether, the additive that dispersibility latex powder is mixed.
(2) by metering device, the additive that will accurately be mixed in building gypsum, quartz sand and (1) in mass ratio It carries out uniformly mixed.
(3) 250g water is added in the dry-mixed mortar for being uniformly mixed (2), stirs evenly and obtains plastering gupsum mortar.
Example 1: examine performance indicator of the invention with reference to GB/T28627-2012 " plastering gupsum ".1 plastering gupsum of example Detection data is shown in Table 1.The mortar obtained by this formula and preparation process, working performance is good, water retention 91%.When pre-hardening Between, final setting time, flexural strength, compression strength and tensile bond strength be all satisfied the requirement of relevant criterion.
Table 1
Example 2
Formula: building gypsum 350g, quartz sand 650g, water-retaining agent 1.5g, retarder 0.5g, starch ether 0.3g, tackifier 0.2g, Water 250g.
Preparation step:
(1) first by retarder, starch ether, cellulose ether, the additive that dispersibility latex powder is mixed.
(2) by metering device, the additive that will accurately be mixed in building gypsum, quartz sand and (1) in mass ratio It carries out uniformly mixed.
(3) 250g water is added in the dry-mixed mortar for being uniformly mixed (2), stirs evenly and obtains plastering gupsum mortar.
Example 1: examine performance indicator of the invention with reference to GB/T28627-2012 " plastering gupsum ".1 plastering gupsum of example Detection data is shown in Table 2.It is compared with example 1, the additive amount of retarder increases 0.1g, and presetting period and final setting time extend. The mortar obtained by this formula and preparation process, working performance is good, water retention 92%, and the presetting period, resists final setting time Folding intensity, compression strength and tensile bond strength are all satisfied the requirement of relevant criterion.
Table two
Example 3
Formula: building gypsum 350g, quartz sand 650g, water-retaining agent 1.5g, retarder 0.5g, starch ether 0.6g, tackifier 0.2g, Water 255g.
Preparation step:
(1) first by retarder, starch ether, cellulose ether, the additive that dispersibility latex powder is mixed.
(2) by metering device, the additive that will accurately be mixed in building gypsum, quartz sand and (1) in mass ratio It carries out uniformly mixed.
(3) 255g water is added in the dry-mixed mortar for being uniformly mixed (2), stirs evenly and obtains plastering gupsum mortar.
Example 1: examine performance indicator of the invention with reference to GB/T28627-2012 " plastering gupsum ".1 plastering gupsum of example Detection data is shown in Table 3.It is compared with example 2, the additive amount of starch ether increases one times of 0.3g, and presetting period and final setting time prolong It is long, it is seen that starch ether shows strong retarding effect.To the mortar obtained by this formula and preparation process, working performance is good Good, thixotropy and workability are more preferable, water retention 93%, presetting period, final setting time, flexural strength, compression strength and stretching Adhesion strength is all satisfied the requirement of relevant criterion.

Claims (9)

1. a kind of bottom degree plastering gupsum, it is characterized in that: it is made of the raw material of following parts by weight: building gypsum 30-50 Part, 45-65 parts of quartz sand, 0.2-0.5 part of retarder, 1.5-2.5 parts of water-retaining agent, 0.3-0.5 part of starch ether, tackifier 0.2-0.5 part, 20-30 parts of water.
2. a kind of bottom degree plastering gupsum according to claim 1, the stone it is characterized in that: a kind of bottom degree is plastered Cream, it is made of the raw material of following parts by weight: 45 parts of building gypsum, 55 parts of quartz sand, 0.4 part of retarder, water-retaining agent 2.0 Part, 0.4 part of starch ether, 0.3 part of tackifier, 25 parts of water.
3. a kind of bottom degree plastering gupsum according to claim 1, it is characterized in that: the retarder is Italy SICIT The Plast Retard PE retarder of 2000 companies production is in ivory white powder.
4. a kind of bottom degree plastering gupsum according to claim 1, it is characterized in that: the quartz sand is fineness modulus The river sand of 1.8-2.5.
5. a kind of bottom degree plastering gupsum according to claim 1, it is characterized in that: β-semi-hydrated gypsum in the building gypsum Content be 45% or more.
6. a kind of bottom degree plastering gupsum according to claim 1, it is characterized in that: the building gypsum fineness is 70~90 Mesh.
7. a kind of bottom degree plastering gupsum according to claim 1, it is characterized in that: it is 40000 that the water-retaining agent, which is viscosity, The hydroxypropyl methyl cellulose ether of~100000mPa.s.
8. a kind of bottom degree plastering gupsum according to claim 1, it is characterized in that: the tackifier are by redispersible The polymer type of rubber powder composition, the re-dispersible glue powder is selected from polyvinyl acetate, pure acrylate, styrene-propene Acid ester copolymer, vinyl chloride-ethylene copolymer, vinyl acetate-ethylene copolymer and vinylacetate-ethylene-versatic acid second One of enoate copolymer is a variety of.
9. a kind of bottom degree plastering gupsum according to claim 8, it is characterized in that: the polymerization of the re-dispersible glue powder The glass transition temperature of object is preferably 14 DEG C~18 DEG C of vinyl acetate-ethylene copolymer.
CN201710530228.5A 2017-07-03 2017-07-03 A kind of scratch coat gypsum and preparation method thereof Pending CN109206108A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111320449A (en) * 2020-03-30 2020-06-23 吉林省兰湖新材料科技有限公司 Lightweight plastering gypsum using diatomite waste particles as aggregate and preparation method thereof
CN111606671A (en) * 2019-06-20 2020-09-01 中建材创新科技研究院有限公司 Plastering gypsum capable of purifying air and preparation method thereof
CN111995346A (en) * 2020-09-04 2020-11-27 无醛饰界装饰产业有限公司 Anti-cracking formaldehyde-free benzene-free gypsum
CN111995343A (en) * 2020-08-24 2020-11-27 湖南小树科技发展有限公司 High-strength water-resistant plastering gypsum
CN112897973A (en) * 2021-02-01 2021-06-04 宝武集团环境资源科技有限公司 Bottom layer plastering gypsum and preparation method thereof
CN114276107A (en) * 2021-12-24 2022-04-05 泰山石膏有限公司 Quick-calcined light plastering gypsum and preparation method thereof

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CN105801065A (en) * 2016-02-26 2016-07-27 美巢集团股份公司 High-strength plastering gypsum and preparation method thereof

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111606671A (en) * 2019-06-20 2020-09-01 中建材创新科技研究院有限公司 Plastering gypsum capable of purifying air and preparation method thereof
CN111320449A (en) * 2020-03-30 2020-06-23 吉林省兰湖新材料科技有限公司 Lightweight plastering gypsum using diatomite waste particles as aggregate and preparation method thereof
CN111320449B (en) * 2020-03-30 2021-12-28 吉林省兰湖新材料科技有限公司 Lightweight plastering gypsum using diatomite waste particles as aggregate and preparation method thereof
CN111995343A (en) * 2020-08-24 2020-11-27 湖南小树科技发展有限公司 High-strength water-resistant plastering gypsum
CN111995346A (en) * 2020-09-04 2020-11-27 无醛饰界装饰产业有限公司 Anti-cracking formaldehyde-free benzene-free gypsum
CN112897973A (en) * 2021-02-01 2021-06-04 宝武集团环境资源科技有限公司 Bottom layer plastering gypsum and preparation method thereof
CN114276107A (en) * 2021-12-24 2022-04-05 泰山石膏有限公司 Quick-calcined light plastering gypsum and preparation method thereof

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