CN101891440B - Special finish coat mortar with desulfurized gypsum as base material for wall insulation system - Google Patents

Special finish coat mortar with desulfurized gypsum as base material for wall insulation system Download PDF

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Publication number
CN101891440B
CN101891440B CN2010102368819A CN201010236881A CN101891440B CN 101891440 B CN101891440 B CN 101891440B CN 2010102368819 A CN2010102368819 A CN 2010102368819A CN 201010236881 A CN201010236881 A CN 201010236881A CN 101891440 B CN101891440 B CN 101891440B
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China
Prior art keywords
finish coat
calcium
quartz sand
coat mortar
insulation
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CN2010102368819A
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Chinese (zh)
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CN101891440A (en
Inventor
孙振平
郑金飚
黄晖皓
蒋正武
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Shanghai Quanzhu Holding Group Co.,Ltd.
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Tongji University
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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
    • C04B28/142Compositions 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 containing synthetic or waste calcium sulfate cements
    • C04B28/144Compositions 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 containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
    • 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
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02Agglomerated materials, e.g. artificial aggregates
    • 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
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04Waste materials; Refuse
    • C04B18/12Waste materials; Refuse from quarries, mining or the like
    • 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
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/2038Resistance against physical degradation
    • 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
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/28Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention belongs to the technical field of constructional material, in particular to a special finish coat mortar with desulfurized gypsum as a base material for a wall insulation system. The finish coat mortar comprises the desulfurized gypsum, fly ash, metakaolin, calcined coal gangue, quicklime powder, calcium chloride, quartz sand with the grain size of 50-80 meshes, quartz sand with the grain size of 100-120 meshes, calcium bentonite, cellulose-acrylate graft copolymer and cellulose fiber. The invention can effectively improve the cracking resistance, waterproofing performance and shock resistance of the wall insulation system. The product of the invention is produced from a large amount of industrial solid wastes such as the desulfurized gypsum, the fly ash, the calcined coal gangue, the metakaolin and the like, and has the advantages of low cost, high green degree, reduction of carbon emission and the like. The invention is suitable for insulation system construction of various building walls.

Description

The finish coat mortar take desulfurated plaster as base-material of wall insulation system special use
Technical field
The invention belongs to building material technical field, be specifically related to a kind of finish coat mortar take desulfurated plaster as base-material of wall insulation system special use.
Background technology
Wall thermal insulating is heat insulation to be the important step of construction industry energy-saving and emission-reduction.At present, China relevant department requires New Buildings to realize energy-conservation 50% target, and the key cities such as Shanghai, Beijing, Tianjin then must reach 65% energy-saving effect.Wall insulation system is divided into insulation and four kinds of patterns of outer wall self heat-preserving in external wall outer insulation, exterior wall internal insulation, the exterior wall.Wherein, external wall outer insulation does not affect interior decoration, does not take the house usable floor area, buildings is had provide protection, can eliminate the advantages such as cold-heat bridge and overall economic efficiency be obvious with it, becomes a kind of building energy conservation pattern that current China generally adopts.External thermal insulation system mainly comprises the thin plastoring system of expansion polyphenyl plate, the polyurethane series thermal insulation mortar system that unifies.The thermal insulation mortar system construction is convenient, and good integrity is subject to engineering circles and generally praises highly.The thermal insulation mortar of already having produced comprises the expansion polyphenyl granule heat-insulating mortar and two kinds of pearlstone (glass bead) thermal insulation mortars of remaining silent.No matter adopt which kind of thermal insulation mortar, still need in the system supporting boundary mortar and finish coat mortar, and composite strengthening net sheet.
Finish coat mortar in the thermal insulation mortar outer heat preservation system adopts usually take cement as base-material, is aided with mineral admixture, size fractionated quartz sand and the formulated product of various additive.Work of the present invention then aims at the resource utilization application problem of a large amount of desulfurated plasters that produce when front running because of the power plant desulfurization device, has developed successfully a kind of finish coat mortar take desulfurated plaster as base-material of wall insulation system special use.
Summary of the invention
The object of the present invention is to provide a kind of finish coat mortar take desulfurated plaster as base-material of wall insulation system special use, this finish coat mortar is take desulfurated plaster as base-material, be aided with other industrial solid castoff and calcium lime powder and form composite gelled material, with calcium chloride as chemical activator, with quartz sand for gathering materials, take calcium-base bentonite and Mierocrystalline cellulose-acrylate graft copolymers as water-holding agent, the special-purpose finish coat mortar of the heat-insulation system take cellulosic fibre as the stress dispersion anti-fissuring agent.Finish coat mortar of the present invention can use after directly adding at the construction field (site) the water stirring, and ultimate compression strength is moderate after the product sclerosis, and is high with the thermal insulation mortar cohesive strength, good toughness, and water-tolerant, shrinking percentage is little.
The finish coat mortar take desulfurated plaster as base-material of a kind of wall insulation system special use that the present invention proposes, this finish coat mortar is comprised of desulfurated plaster, flyash, metakaolin, calcining coal gangue, calcium lime powder, calcium chloride, 50-80 order quartz sand, 100-120 order quartz sand, calcium-base bentonite, Mierocrystalline cellulose-acrylate graft copolymers and cellulosic fibre.The weight ratio of its component is as follows:
Desulfurated plaster 100
Flyash 20-100
Metakaolin 30-150
Calcining coal gangue 20-120
Calcium lime powder 5-18
Calcium chloride 2-10
50-80 order quartz sand 400-1200
100-120 order quartz sand 200-800
Calcium-base bentonite 2-16
Mierocrystalline cellulose-acrylate graft copolymers 0.3-1.0
Cellulosic fibre 0.4-2.0.
The better weight ratio of each component is:
Desulfurated plaster 100
Flyash 40-95
Metakaolin 45-130
Calcining coal gangue 45-110
Calcium lime powder 5-12
Calcium chloride 4-9
50-80 order quartz sand 550-1100
100-120 order quartz sand 300-700
Calcium-base bentonite 4-13
Mierocrystalline cellulose-acrylate graft copolymers 0.4-0.9
Cellulosic fibre 0.6-1.8.
Among the present invention, its SO of described desulfurated plaster 3Weight content more than or equal to 42% less than 60%.
Among the present invention, described flyash is a kind of in I level F class flyash or the II level F class flyash.
Among the present invention, described metakaolin be natural kaolin 600-1000 ℃ of calcining more than 1.5 hours and levigate to specific surface area greater than 350m 2The powder of/Kg.
Among the present invention, described calcining coal gangue be the raw coal spoil 600-950 ℃ of calcining more than 2.0 hours and levigate to specific surface area greater than 380m 2The powder of/Kg.
Among the present invention, the length of described cellulosic fibre less than 9mm greater than 0mm.
The preparation method of the finish coat mortar that the present invention proposes, its concrete steps are as follows:
(1) take by weighing by weight raw material, and with 50-80 order quartz sand, 100-120 order quartz sand, in advance dry mixing of cellulosic fibre is to uniform state;
(2) desulfurated plaster, flyash, metakaolin, calcining coal gangue, calcium lime powder, calcium chloride, calcium-base bentonite and Mierocrystalline cellulose-acrylate graft copolymers are added in the mixture in the step (1);
(3) be mixed to uniform state;
More than each step all under normal temperature and normal pressure, carry out.
The finish coat mortar using method of gained of the present invention is: adds and can take after the water uniform mixing streak method to carry out the finish coat construction, and can compound alkali resistant glass fibre open weave cloth and Galvanized Steel Wire Netting, form the integral body with certain impact toughness after the dry sclerosis.
Among the present invention, desulfurated plaster, flyash, metakaolin, calcining coal gangue, calcium lime powder form the cementitious material system of polycomponent non-cement grog jointly.Flyash, metakaolin and calcining coal gangue all contain aluminium sesquioxide and the ferric oxide that has in a large number lateral reactivity, under the alkali environment that the calcium hydroxide that they generate at calcium lime powder chance water hydratable provides, be combined with the sulfate ion of desulfurated plaster stripping, form the extremely low ettringite (3CaO.Al of solubleness 2O 3(Fe 2O 3) .3CaSO 4.32H 2O), the active silica in them is then met the calcium hydroxide that water hydratable generates with calcium lime powder, forms the CSH gel, is filled in the ettringite overlap joint, piles up in the formed spatial network, improves intensity.The existence of calcium chloride can be played and excite flyash, the effect of metakaolin and calcining coal gangue activity.50-80 order quartz sand and 100-120 order quartz sand are as gathering materials, and after mutually arranging in pairs or groups by preferred proportion, the accumulation degree is maximum, can play the effect that hardened paste shrinks and reduce paste content that suppresses.Calcium-base bentonite is a kind of water-swelling and water-retentivity material, and with desulfurated plaster in the product of the present invention, flyash, metakaolin, calcining coal gangue, calcium lime powder and calcium chloride have preferably consistency.Mierocrystalline cellulose-acrylate graft copolymers is a kind of novel water-retaining agent, has preferably water retention capacity, and maintenance action in playing preferably to product of the present invention, improves its interface binding intensity.The adding of cellulosic fibre then makes a large amount of staple fibres that distributing in the product of the present invention, helps dispersive stress, resists the cracking in the dry shrinkage, and can improve the toughness of product of the present invention.
A kind of finish coat mortar take desulfurated plaster as base-material of wall insulation system special use of the present invention, utilized in a large number the industrial solid castoff desulfurated plaster, flyash, metakaolin and calcining coal gangue, production technique is simple, the starting material wide material sources, and performance is better than the like product take cement as base-material, the products production cost can reduce 12%-18%, has preferably market outlook.
Embodiment
The following examples are to further specify of the present invention, rather than limit the scope of the invention.
Embodiment 1
A kind of finish coat mortar take desulfurated plaster as base-material of wall insulation system special use is counted desulfurated plaster 100 by weight, I level F class flyash 100, metakaolin 30, calcining coal gangue 20, calcium lime powder 5, calcium chloride 2,50-80 order quartz sand 400,100-120 order quartz sand 200, calcium-base bentonite 2, Mierocrystalline cellulose-acrylate graft copolymers 0.3, the weight ratio of cellulosic fibre 0.4 is formulated.After water that adding accounts for this product weight 20% stirs, its operable time is 4.0 hours, tensile bond strength (normal temperature 28 days) is 1.1MPa, immersion tensile bond strength (normal temperature 28 days, soaked 7 days) be 0.8MPa, ultimate compression strength is 21.2MPa, and the backfin ratio is 2.6, and shrinking percentage is less than 0.2%.
Embodiment 2
A kind of finish coat mortar take desulfurated plaster as base-material of wall insulation system special use is counted desulfurated plaster 100 by weight, II level F class flyash 20, metakaolin 150, calcining coal gangue 120, calcium lime powder 12, calcium chloride 10,50-80 order quartz sand 800,100-120 order quartz sand 650, calcium-base bentonite 10, Mierocrystalline cellulose-acrylate graft copolymers 0.7, the weight ratio of cellulosic fibre 1.4 is formulated.After water that adding accounts for this product weight 33% stirs, its operable time is 4.2 hours, tensile bond strength (normal temperature 28 days) is 1.0MPa, immersion tensile bond strength (normal temperature 28 days, soaked 7 days) be 0.9MPa, ultimate compression strength is 18.0MPa, and the backfin ratio is 2.8, and shrinking percentage is less than 0.2%.
Embodiment 3
A kind of finish coat mortar take desulfurated plaster as base-material of wall insulation system special use is counted desulfurated plaster 100 by weight, II level F class flyash 90, metakaolin 130, calcining coal gangue 100, calcium lime powder 18, calcium chloride 8,50-80 order quartz sand 1200,100-120 order quartz sand 800, calcium-base bentonite 14, Mierocrystalline cellulose-acrylate graft copolymers 0.9, the weight ratio of cellulosic fibre 1.3 is formulated.After water that adding accounts for this product weight 37% stirs, its operable time is 3.2 hours, tensile bond strength (normal temperature 28 days) is 1.2MPa, immersion tensile bond strength (normal temperature 28 days, soaked 7 days) be 0.8MPa, ultimate compression strength is 21.0MPa, and the backfin ratio is 2.9, and shrinking percentage is less than 0.2%.
Embodiment 4
A kind of finish coat mortar take desulfurated plaster as base-material of wall insulation system special use is counted desulfurated plaster 100 by weight, I level F class flyash 100, metakaolin 150, calcining coal gangue 120, calcium lime powder 18, calcium chloride 10,50-80 order quartz sand 1200,100-120 order quartz sand 800, calcium-base bentonite 16, Mierocrystalline cellulose-acrylate graft copolymers 1.0, the weight ratio of cellulosic fibre 2.0 is formulated.After water that adding accounts for this product weight 42% stirs, its operable time is 3.9 hours, tensile bond strength (normal temperature 28 days) is 1.3MPa, immersion tensile bond strength (normal temperature 28 days, soaked 7 days) be 1.0MPa, ultimate compression strength is 17.5MPa, and the backfin ratio is 2.7, and shrinking percentage is less than 0.2%.

Claims (7)

1. the finish coat mortar take desulfurated plaster as base-material of a wall insulation system special use, it is characterized in that described finish coat mortar is comprised of desulfurated plaster, flyash, metakaolin, calcining coal gangue, calcium lime powder, calcium chloride, 50-80 order quartz sand, 100-120 order quartz sand, calcium-base bentonite, Mierocrystalline cellulose-acrylate graft copolymers and cellulosic fibre, the weight ratio of each component is as follows:
Desulfurated plaster 100
Flyash 20-100
Metakaolin 30-150
Calcining coal gangue 20-120
Calcium lime powder 5-18
Calcium chloride 2-10
50-80 order quartz sand 400-1200
100-120 order quartz sand 200-800
Calcium-base bentonite 2-16
Mierocrystalline cellulose-acrylate graft copolymers 0.3-1.0
Cellulosic fibre 0.4-2.0.
2. finish coat mortar according to claim 1 is characterized in that the weight ratio of described each component is:
Desulfurated plaster 100
Flyash 40-95
Metakaolin 45-130
Calcining coal gangue 45-110
Calcium lime powder 5-12
Calcium chloride 4-9
50-80 order quartz sand 550-1100
100-120 order quartz sand 300-700
Calcium-base bentonite 4-13
Mierocrystalline cellulose-acrylate graft copolymers 0.4-0.9
Cellulosic fibre 0.6-1.8.
3. finish coat mortar according to claim 1 and 2 is characterized in that its SO of described desulfurated plaster 3Weight content more than or equal to 42% less than 60%.
4. finish coat mortar according to claim 1 and 2 is characterized in that described flyash is a kind of in I level F class flyash or the II level F class flyash.
5. finish coat mortar according to claim 1 and 2, it is characterized in that described metakaolin be natural kaolin 600-1000 ℃ of calcining more than 1.5 hours and levigate to specific surface area greater than 350m 2The powder of/Kg.
6. finish coat mortar according to claim 1 and 2, it is characterized in that described calcining coal gangue be the raw coal spoil 600-950 ℃ of calcining more than 2.0 hours and levigate to specific surface area greater than 380m 2The powder of/Kg.
7. finish coat mortar according to claim 1 and 2, the length that it is characterized in that described cellulosic fibre less than 9mm greater than 0mm.
CN2010102368819A 2010-07-23 2010-07-23 Special finish coat mortar with desulfurized gypsum as base material for wall insulation system Active CN101891440B (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102108027A (en) * 2011-03-23 2011-06-29 江苏省一夫新材料科技有限公司 Cement mortar for constructional engineering
CN102126845A (en) * 2011-03-23 2011-07-20 江苏省一夫新材料科技有限公司 Cement plastering mortar
CN103787639A (en) * 2012-11-01 2014-05-14 广西启利新材料科技股份有限公司 Thermal-insulating block for building wall and preparation method thereof
CN104072194B (en) * 2014-06-30 2016-02-17 孙红芳 Thermal insulation layer brushing gypsum
CN105174888B (en) * 2015-09-02 2017-05-31 管小军 A kind of preparation method of the ventilative desulfurized gypsum base dry-mixed mortar of water conservation
CN108409253A (en) * 2018-05-17 2018-08-17 肥西县碧涛建材有限公司 A kind of mortar and preparation method thereof shortening setting time
CN108911670B (en) * 2018-08-02 2021-02-05 张家港江苏科技大学产业技术研究院 Self-compacting concrete using industrial waste titanium gypsum and preparation method thereof
CN112374852A (en) * 2021-01-15 2021-02-19 广东博智林机器人有限公司 Dry powder facing material and preparation method and use method thereof

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Address after: 200233, building 7, building 333, No. 5, Guiping Road, Shanghai, Xuhui District

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