CN105314998B - A kind of entringite colloid is thermal insulation mortar of template and preparation method thereof - Google Patents
A kind of entringite colloid is thermal insulation mortar of template and preparation method thereof Download PDFInfo
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- CN105314998B CN105314998B CN201410365335.3A CN201410365335A CN105314998B CN 105314998 B CN105314998 B CN 105314998B CN 201410365335 A CN201410365335 A CN 201410365335A CN 105314998 B CN105314998 B CN 105314998B
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of thermal insulation mortar and preparation method thereof, more particularly to entringite colloid as template, form water mutually uniform three-dimensional network microcellular structure, by adding Binder Materials, thin lightweight aggregate, admixture and additive, a kind of thermal insulation mortar with network microcellular structure function admirable is prepared.The characteristics of thermal insulation mortar of the present invention has lightweight, high-strength, low thermal conductivity, can effectively lift the performance indications of existing thermal insulation mortar.
Description
Technical field
The present invention relates to a kind of thermal insulation mortar and preparation method thereof, more particularly to entringite colloid as template, formed
The uniform three-dimensional network microcellular structure of water phase, by adding Binder Materials, thin lightweight aggregate, admixture and additive, prepares one
Plant the thermal insulation mortar with network microcellular structure function admirable.Thermal insulation mortar of the present invention has lightweight, high-strength, low thermal conductivity
Feature, can effectively lift the performance indications of existing thermal insulation mortar.
Background technology
Thermal insulation mortar is because with energy-conserving profit waste, insulation, antifreeze, ageing-resistant excellent properties and cheap valency of preventing fires
The features such as lattice, it is applicable not only to New Buildings, and suitable for there is the building to have the extensive market demand.
Patent CN200610012729.6 discloses a kind of efficient energy-saving kervit microbead insulated sand slurry, and its component is:Cement,
Glass bead, redispersible latex powder, composite fibre, methyl cellulose ether, air entraining agent;Wherein, composite fibre includes resistance to drawing
Fiber, PP fibers and wood-fibred.The present invention has ageing resistance and fire protecting performance, not hollowing cracking, and intensity is high, adhesive property
It is good.Patent CN 200710019455.8 discloses a kind of adhesive polystyrene granule heat-insulating mortar, including rubber powder material, the light bone of EPS particles
Material and water, the mass ratio of rubber powder material, EPS particles lightweight aggregate and water is 35: 1.5: 250.The present invention has that dry density is light, heat conduction system
The characteristics of low, weathering stability of number is good, fire resistance rating is high, can improve the heat-insulating property of building containment system, reduce the energy and disappear
Consumption.
But relative to styrofoam, polyurethane etc. organic heat-insulating insulation material, the thermal conductivity factor of thermal insulation mortar is typically high
Up to 0.07 ~ 0.085w/mk, heat insulation effect is limited, limits the application of thermal insulation mortar.
To reduce the thermal conductivity factor of conventional vacuum mortar, patent CN201110284999.3 discloses a kind of fretting map and is modified
Kervit microbead insulated sand slurry and preparation method thereof, according to air entraining agent and the cooperative effect of high efficiency water reducing agent, with fretting map mode system
Into fretting map kervit microbead insulated sand slurry.The fretting map kervit microbead insulated sand slurry is by inorganic coagulation material, flyash, grey calcium
Powder, dispersible rubber powder, hydroxypropyl methyl cellulose ether, air entraining agent, water reducer, wood-fibred, polypropylene fibre, glass bead prepare
Form.Fretting map kervit microbead insulated sand slurry of the invention significantly reduces the thermal conductivity factor of mortar（0.06~0.07w/m·
k）, improve the dispersiveness and workability of mortar, construction of being more convenient for.
The disclosure of above patent and application, may advantageously facilitate the development of China's thermal insulation mortar industry, but thermal insulation mortar
The higher problem of thermal conductivity factor is not still solved effectively, therefore, the present invention propose a kind of new thermal insulation mortar and its
Preparation method.
The content of the invention
To solve the deficiency that conventional vacuum mortar is present, the present invention proposes a kind of insulation sand with entringite as template
Slurry and preparation method thereof, it is comprised the following steps.
（1）Prepare entringite colloid.
The entringite colloid, is generated by aluminum sulfate and lime reaction or reacts generation or by calcium alum by calcium aluminate and gypsum
Stone flour body is mixed with water, is preferably generated by aluminum sulfate and lime reaction.
The entringite colloid, when being generated by aluminum sulfate and lime reaction, is first dissolved in water, then with limewash by aluminum sulfate
Mix under agitation, generate sticky entringite colloid.
The entringite colloid, when being generated by aluminum sulfate and lime reaction, is first dissolved in water, aluminum sulfate and water quality by aluminum sulfate
Amount fraction is 1 ~ 50:100；Limewash is mixed by quick lime or white lime with water, and preferably quick lime mixes with water, quick lime and water
Mass fraction be 1 ~ 100:100.
The entringite colloid is viscous fluid, and pH value is 5 ~ 12, preferably 6 ~ 10, particularly preferred 6.5 ~ 9.
（2）Binder Materials, fine sand, thin lightweight aggregate, admixture are weighed in proportion, is stirred, form premix siccative.
The mass fraction ratio of the premix siccative composition is Binder Materials：Fine sand：Thin lightweight aggregate：Admixture=1 ~ 30：1~
40:2~90：0.1~5.
Described Binder Materials includes one or more of cement, lime and gypsum.The cement include portland cement,
Aluminate cement, sulphate aluminium cement, ferrous aluminate cement, and above cement blend slag, flyash, volcanic ash and gypsum shape
Into complex cement.
The thin lightweight aggregate includes one or more in glass bead, expanded perlite, float stone, granular polystyrene.
The admixture includes that flyash, sierozem power, blast-furnace cinder, volcanic ash, zeolite powder, vermiculite power, silicon ash, silicon are micro-
One or more in powder, diatomite, bentonite, Concave-convex clay rod, rice hull ash.
（3）Entringite colloid and premix siccative are mixed, additive and fibre reinforced materials is added, stirring obtains being incubated sand
Slurry.
The entringite colloid and premix siccative mixing, add additive and fibre reinforced materials, its quality of material fraction
Than being：Entringite colloid：Premix siccative：Additive：Fiber reinforcement material=10 ~:1000：10~1000:0.01~1:0.1~10；It is excellent
Select entringite colloid：Premix siccative：Additive：Fiber reinforcement material=50 ~:200：50~400:0.01~1:0.5 ~ 50, particularly preferably
Entringite colloid：Premix siccative：Additive：Fiber reinforcement material=100 ~ 150:120~300:0.01~1:1~10.
The additive includes in water reducer, economization agent, waterproofing agent, thickener, pumping admixture, early strength agent, retarder
Plant or several.
Described fibre reinforced materials include glass fibre, polyester fiber, polypropylene fibre, wood-fibred, cellulose fibre,
One or more in sepiolite fibre, brucite fiber.
The mechanism that entringite colloid prepares thermal insulation mortar for template is introduced first.
Template is called structure directing agent, and stay in place form effect is played in containing Microporous Compounds generating process, and it is special to induce
The generation of structure, widely used organic amine and quaternary ammonium ion are used as template in the preparation process of zeolite molecular sieve.
Entringite, also known as crystal hydrated calcium aluminate sulfate, are a kind of colourless mineral crystal to yellow, its chemical molecular
For：3CaO·Al2O3·3CaSO4·32H2The quantity of O, the wherein crystallization water is relevant with the temperature and humidity of local environment.
There are the natural minerals of entringite in nature, but causing the attention of researcher, to be it produce in the aquation of cement
Found in thing, generation crystal water is combined with sulfate ion by C-A in cement hydration process-H gels (drated calcium aluminate)
Change calcium sulphoaluminate (abbreviation AFt), AFt is essentially identical with the chemical composition and crystal structure of natural minerals entringite, and with one
Fixed dilatancy, can be obviously improved early age strength of concrete and anti-shrink index, be usually used to configuration high-early (strength) cement or expansion
Concrete.
Entringite material can relatively easily be obtained by chemical reaction, its reaction principle is as follows：
Al2(SO4)·18H2O+6Ca(OH)2 3CaO·Al2O3·3CaSO4·32H2O
Entringite can also be obtained by following principle：
CaO·Al2O3+2CaO+3CaSO4·2H2O+30H2O 3C3A·3CaSO4·32H2O
Under agitation, above-mentioned reaction generation entringite is grown up, as finely ground particles, due to the calcium alum in the aqueous solution
Stone has up to 32 crystallizations water, so that the entringite molecule even suspension of generation turns into a kind of ash in water phase
It is blue with network microcellular structure thick gel material.If it is observation main body to regard entringite, it is considered that entringite
Grain is reunited and is piled into loose network structure, and inside configuration is filled with moisture.Experiment shows that entringite colloid has preferably steady
It is qualitative, bottom can not be deposited on up to the several months, will not also recrystallize or be crosslinked and turn into gel, while also certain
Thixotropy, the agitated rear viscosity of entringite of standing can return to initial level.
Simply conclude, we can be found that entringite there are following very unique excellent properties.
1）The early strength of cement can be improved.
2）The contraction during hardening of cement can be avoided with dilatancy.
3）With good colloidal nature, sticky water phase colloidal substance of the stabilization with microcellular structure can be formed.
4）Hydrated product and cement as cement itself have compatibility very high.
5）It is nontoxic compared to organic template, and need not remove in the later stage.
Above characteristic is based on, entringite colloid is chosen as the template of thermal insulation mortar of the invention.
Water inside entringite colloid mutually can not only promote the aquation of cement, while cement curing in water can also be reached
Effect, entringite colloid can facilitate the generation of entringite in cement hydration process as crystal seed, improve hydrated cementitious intensity, contracting
Short demoulding time, the dilatancy of entringite can also offset the blockage effect that the evaporation of concrete hole internal moisture causes.
The key control point of technical solution of the present invention implementation and the technical characterstic of scheme is explained in detail below.
Step（1）The entringite colloid, can be generated by aluminum sulfate and lime reaction or be reacted by calcium aluminate and gypsum
Generation is mixed by entringite powder and water.Wherein in the mode of calcium aluminate and gypsum reaction generation, calcium aluminate and gypsum
Water insoluble, both hydration reaction processes are slower, it is not easy to obtain tiny entringite particle, form entringite colloidal quality
Amount is whard to control；Entringite powder and water mixture manufacturing entringite colloid, it is desirable to which entringite powder has superfine granularity, obtain calcium
Aluminite colloid may also have the stability of the entringite influence colloid of larger particles.And the mode of aluminum sulfate and lime reaction, sulphur
Sour aluminium can be dissolved completely in water, and quick lime solution water can also obtain minimum particle diameter by stirring, when aluminum sulfate and stone
Mixing can be to obtain the entringite compared with small particle to ash under agitation, and then form the entringite colloid of high-quality.So it is preferred that
Aluminum sulfate generates entringite colloid with lime reaction.Similarly, the lime, preferably quick lime.
When aluminum sulfate is generated with lime reaction, the concentration of aluminum sulfate solution and limewash is lower, and mixing speed is faster, the two
Reaction generation entringite particle diameter is also smaller, but if the concentration of aluminum sulfate solution and limewash is too low, the entringite particle of formation
Although existing in the form of colloidal sol, because entringite particle is too less, it is impossible to form sticky colloid substances, just do not have yet
It is the Binder Materials such as dispersion cement, plays the effect of template.Meanwhile, solubility of the aluminum sulfate in water has certain scope,
Impossible complete miscibility, entringite colloid is also not intended to too much as template from from the point of view of cost.So it is it is preferred that square
A ratio for preferably aluminum sulfate and lime and water can be limited in case.
Experiment finds that pH value has significant impact to the viscosity of entringite colloid, and aluminum sulfate solution is acidity, limewash
It is alkalescence, the two reaction is actually a kind of neutralization reaction, and when pH value is too high or too low, the viscosity of entringite colloid can drop
Low, when pH value 7 ~ 9, the entringite colloid of same concentrations has highest viscosity.
Step（2）The middle suitable Binder Materials of selection, fine sand, thin lightweight aggregate and admixture collocation, can obtain optimal
Thermal insulation mortar intensity and other combination properties.
Glass bead, expanded perlite, float stone, granular polystyrene in thin lightweight aggregate, can further reduce gained insulation
The density and thermal conductivity factor of mortar.
Step（3）Entringite colloid and premix siccative mixing material ratio, directly affects gained thermal insulation mortar density,
Intensity and thermal conductivity factor.Generally, entringite rubber proportional is higher, and thermal insulation mortar density is lower, thermal conductivity factor is lower, intensity
Lower, vice versa.The addition of additive and reinforcing fiber can improve thermal insulation mortar construction workability, pumping and insulation sand
The water proofing property of slurry, anti-contracility and durability etc..
Beneficial effect.
In sum, relative to prior art, the present invention has advantage following prominent.
1）The thermal insulation mortar that the present invention is prepared with entringite colloid as template, with three-dimensional network microcellular structure, intensity
Up to 0.2 ~ 0.5MPa, thermal conductivity factor is 0.04 ~ 0.06w/mk, dry density<400kg/m3, do not ftracture, not efflorescence, while carrying
The intensity and heat-proof quality of conventional vacuum mortar are risen.
2）The thermal insulation mortar that the present invention is prepared with entringite colloid as template, is purely inorganic material, and fire protecting performance is good, ring
Protect pollution-free, durability is high, can be with the building same life-span.
3）The thermal insulation mortar that the present invention is prepared with entringite colloid as template, raw material is cheap to be easy to get, process is simple, material
Compatibility is good, and stability is high, and production process is easily controllable, is conducive to automating mass industrialized production.
4）The thermal insulation mortar that the present invention is prepared with entringite colloid as template, can be with compatible existing thermal insulation mortar production work
Skill, beneficial to the transition and upgrade of conventional vacuum mortar industry.
Specific embodiment
The specific embodiment of the thermal insulation mortar that entringite colloid is template is provided below, one is entered as to the present invention
Step is described in detail.
Embodiment 1.
Take 200g aluminum sulfate and be dissolved in 2000g water, prepare aluminum sulfate solution, take 72g quick limes and be dissolved in 720g water, prepare lime
Water.Limewash is placed in container, aluminum sulfate solution is slowly added in the case where 200r/min is stirred, until pH value is 7.0,
Obtain translucent entringite colloid.Premix siccative is formulated as follows and mixes：Portland cement 450g, glass bead 225g, silicon
Grey 27g, pulverized limestone 54g, gypsum 54g.Wood-fibred 27g, sepiolite fibre 54g and economization agent 2g are added the entringite glue for making
Body, after stirring 3min, is adding premix siccative, continues to stir 5min.After gained thermal insulation mortar natural curing 28d, dry density
300g/m3, thermal conductivity factor 0.057w/mk.
Embodiment 2.
Take 220g aluminum sulfate and be dissolved in 2200g water, prepare aluminum sulfate solution, take 79g quick limes and be dissolved in 790g water, prepare lime
Water.Limewash is placed in container, aluminum sulfate solution is slowly added in the case where 200r/min is stirred, until pH value is 6.8,
Obtain translucent entringite colloid.Premix siccative is formulated as follows and mixes：Portland cement 600g, glass bead 280g, silicon
Grey 60g, pulverized limestone 100g, gypsum 60g.Wood-fibred 10g, polyester fiber 30g and the polyvinyl alcohol 30g that concentration is 10% are added
The entringite colloid for making, after stirring 4min, is adding premix siccative, continues to stir 8min.Gained thermal insulation mortar is supported naturally
After shield 28d, dry density 360g/m3, thermal conductivity factor 0.063w/mk.
Embodiment 3.
Take 150g aluminum sulfate and be dissolved in 2000g water, prepare aluminum sulfate solution, take 54g quick limes and be dissolved in 1000g water, prepare stone
Buck.Limewash is placed in container, aluminum sulfate solution is slowly added in the case where 200r/min is stirred, until pH value is
7.2, obtain translucent entringite colloid.Premix siccative is formulated as follows and mixes：Portland cement 400g, glass bead
280g, silicon ash 100g, pulverized limestone 60g, gypsum 40g.Wood-fibred 10g, polypropylene fibre 20g and economization agent 2g are added what is made
Entringite colloid, after stirring 5min, is adding premix siccative, continues to stir 5min.By gained thermal insulation mortar natural curing 28d
Afterwards, dry density 260g/m3, thermal conductivity factor 0.052w/mk.
Embodiment 4.
Take 150g aluminum sulfate and be dissolved in 2000g water, prepare aluminum sulfate solution, take 54g quick limes and be dissolved in 1000g water, prepare stone
Buck.Limewash is placed in container, aluminum sulfate solution is slowly added in the case where 200r/min is stirred, until pH value is
7.2, obtain translucent entringite colloid.Premix siccative is formulated as follows and mixes：Portland cement 500g, granular polystyrene 50g,
Silicon ash 100g, pulverized limestone 60g, flyash 40g.Wood-fibred 10g, polypropylene fibre 20g and economization agent 2g are added the calcium for making
Aluminite colloid, after stirring 5min, is adding premix siccative, continues to stir 5min.After by gained thermal insulation mortar natural curing 28d,
Dry density 220g/m3, thermal conductivity factor 0.048w/mk.
The above, is only presently preferred embodiments of the present invention, and any type of limitation is not done to the present invention.It is every
According to any simple modification, equivalent variations and modification that technology of the invention and method are substantially made to above example, still
Belong in the range of technology of the invention and method scheme.
Claims (7)
1. the preparation method of a kind of thermal insulation mortar with entringite as template, it is characterized in that, the preparation process includes following step
Suddenly：
（1）Prepare entringite colloid；
The entringite colloid, is generated by aluminum sulfate and lime reaction or reacts generation or by entringite powder by calcium aluminate and gypsum
Body is mixed with water；
The entringite colloid is viscous fluid, and pH value is 5 ~ 12;
（2）Binder Materials, fine sand, thin lightweight aggregate, admixture are weighed in proportion, is stirred, form premix siccative；
The mass fraction ratio of the premix siccative composition is Binder Materials：Fine sand：Thin lightweight aggregate：Admixture=1 ~ 30：1~40:2~
90：0.1~5；
Described Binder Materials includes one or more of cement, lime and gypsum；
The cement includes portland cement, aluminate cement, sulphate aluminium cement, ferrous aluminate cement, and above cement is mixed
Close the complex cement that slag, flyash, volcanic ash and gypsum are formed；
The thin lightweight aggregate includes one or more in glass bead, expanded perlite, float stone, granular polystyrene；
The admixture includes flyash, sierozem power, blast-furnace cinder, volcanic ash, zeolite powder, vermiculite power, silicon ash, silicon powder, silicon
One or more in diatomaceous earth, bentonite, Concave-convex clay rod, rice hull ash；
（3）Entringite colloid and premix siccative are mixed, additive and fibre reinforced materials is added, stirring obtains thermal insulation mortar；
The entringite colloid and premix siccative mixing, add additive and fibre reinforced materials, its quality of material score ratio to be
Entringite colloid：Premix siccative：Additive：Fibre reinforced materials=10 ~ 1000：10~1000:0.01~1:0.1~10；
The additive include water reducer, economization agent, waterproofing agent, thickener, pumping admixture, early strength agent, retarder in one kind or
It is several；
Described fibre reinforced materials includes glass fibre, polyester fiber, polypropylene fibre, wood-fibred, cellulose fibre, Hai Pao
One or more in mineral wool, brucite fiber.
2. preparation method according to claim 1, it is characterized in that step（1）Described entringite colloid, by aluminum sulfate with
Lime reaction is generated or reacted by calcium aluminate and gypsum and generates or mixed by entringite powder and water.
3. preparation method according to claim 1, it is characterized in that step（1）Described entringite colloid, by aluminum sulfate with
When lime reaction is generated, aluminum sulfate and lime are first dissolved in water respectively, aluminum sulfate is 1 ~ 50 with water quality fraction:100, quick lime
It is 1 ~ 100 with the mass fraction of water:100, the lime includes quick lime or white lime.
4. preparation method according to claim 1, it is characterized in that step（1）The entringite colloid is viscous fluid, pH value
It is 6 ~ 10.
5. preparation method according to claim 1, it is characterized in that step（3）The entringite colloid and premix siccative are mixed
Close, add additive and fibre reinforced materials, its quality of material score ratio is entringite colloid：Premix siccative：Additive：Fiber
Reinforcing material=50 ~ 200：50~400:0.01~1:0.5~10.
6. preparation method according to claim 1, it is characterized in that step（3）The entringite colloid and premix siccative are mixed
Close, add additive and fibre reinforced materials, its quality of material score ratio is entringite colloid：Premix siccative：Additive：Fiber
Reinforcing material=100 ~ 150:120~300:0.01~1:1~10.
7. a kind of thermal insulation mortar with entringite as template, it is characterized in that, the thermal insulation mortar is any by claim 1 ~ 6
Obtained in preparation method described in one.
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| JP5555646B2 (en) * | 2010-02-26 | 2014-07-23 | 美濃窯業株式会社 | Ceramic porous heat insulating material and method for producing the same |
| CN102757256A (en) * | 2012-07-18 | 2012-10-31 | 公安部四川消防研究所 | Incombustible organic/inorganic porous waterproof thermal-insulation composite material and preparation method thereof |
| CN103224362A (en) * | 2013-04-12 | 2013-07-31 | 江苏祥源环保建材科技有限公司 | Inorganic thermal insulation mortar and preparation method thereof |
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