CN105314952B - A kind of entringite colloid is load bearing heat preserving concrete of template and preparation method thereof - Google Patents
A kind of entringite colloid is load bearing heat preserving concrete of template and preparation method thereof Download PDFInfo
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- CN105314952B CN105314952B CN201410365271.7A CN201410365271A CN105314952B CN 105314952 B CN105314952 B CN 105314952B CN 201410365271 A CN201410365271 A CN 201410365271A CN 105314952 B CN105314952 B CN 105314952B
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Abstract
The present invention relates to a kind of load bearing heat preserving concrete and preparation method thereof, more particularly to entringite colloid as template, form water mutually uniform three-dimensional network microcellular structure, by adding sol-gel materials, fine aggregate, coarse aggregate, admixture and additive, the new concrete for possessing weight capacity and heat insulation function while preparing a kind of uniform cell structure.The characteristics of load bearing heat preserving concrete of the present invention has lightweight, high-strength, low thermal conductivity, the part such as fragment of brick, building block and sheet material or assembled stair, wallboard, floor, balcony slab, roof boarding can be prefabricated in the factory into, can also be cast-in-place at the construction field (site), compatible process for producing aerated concrete, foamed concrete production technology and normal concrete Prefabrication technique at present, beneficial to the transition and upgrade of conventional concrete industry, the development to promoting China's housing industrialization and green building concrete material has significant realistic meaning.
Description
Technical field
The present invention relates to a kind of load bearing heat preserving concrete and preparation method thereof, more particularly to entringite colloid as template
Agent, forms water mutually uniform three-dimensional network microcellular structure, by adding Binder Materials, fine aggregate, coarse aggregate, admixture and additional
Agent, prepares a kind of new concrete for being provided simultaneously with weight capacity and heat insulation function.Load bearing heat preserving concrete of the present invention has
The characteristics of lightweight, high-strength, low thermal conductivity, fragment of brick, building block and sheet material or assembled stair, wallboard, building can be prefabricated in the factory into
The parts such as plate, balcony slab, roof boarding, it is also possible to cast-in-place at the construction field (site), to promoting China's housing industrialization and green building mixed
The development of solidifying soil material has significant realistic meaning.
Background technology
Developing rapidly with housing industrialization and green building and at home, proposes to high performance novel wall material
New requirement, it is particularly outstanding to being provided simultaneously with the demand of the load bearing heat preserving integration product of weight capacity and good thermal insulation property
For urgent.
Standard GB/T 50368-2005《Norm of residential housing》Middle clear stipulaties, intensity of residential structure concrete etc.
Level is not lower than C20；The intensity of bearing masonry material should meet the following requirements in residential structure：It is fired common brick, sintered porous
Brick, autoclaved lime-sand brick, the strength grade of autoclaved fly ash brick are not lower than MU10, and the strength grade of concrete segment is not lower than
MU7.5。
On the other hand, the existing wall heat insulation material of existing market, air entrained concrete, foam concrete equal strength are generally low
In MU7.5, most foam concrete, thermal insulation mortar, rock cotton board, pearlite slab, XPS, polyurethane foam, phenol
Urea formaldehyde plate equal strength is even more generally less than 0.5MPa.
To solve the conspicuous contradiction between load-carrying members and heat insulation function, researcher employs following technical scheme.
1）The sandwich composite construction of conventional concrete or steel construction cladding or filling insulation material.This is to study people at present
Member takes most technical schemes.Patent CN201210537679.9, discloses a kind of heat-preserving load-bearing composite light building board,
Including light steel skeleton, light foam concrete, connector, connector is connected with vertical steel joist, overall around light steel skeleton
It is cast with light foaming concrete.Patent CN02159997.1 discloses a kind of foam cement composite plate and its manufacturing side
Method, is mainly made up of main frame, foam cement core, steel truss and surface layer；Foam cement composite plate is with foam cement as core
Layer, is had by the enhanced surface layer of anticracking material thereon, and the main frame that shaped steel or concrete are constituted is provided with plate periphery or plate,
The steel truss being connected with main frame is provided with foam cement sandwich layer.Patent CN201220496538.2 discloses a kind of energy-saving heat preserving
Side fascia, is followed successively by supporting course, heat-insulation layer, anti-impacting layer, decoration and constitutes from inside to outside.Patent CN201320487894.2 is disclosed
A kind of foam ceramsite concrete composite plate for making load bearing wall, including fiber cement board structure and foam ceramsite concrete layer knot
Structure, foam ceramsite concrete Rotating fields are sandwiched between two fiber cement boards.Patent CN201310480236.5 discloses a kind of mixed
Solidifying soil composite thermal self-insulation building block, constitutes by core material and by the light aggregate concrete building block that core material surrounding is coated, and core material is guarantor
Warm layer, light aggregate concrete building block is supporting course.Patent CN200810064769.4 discloses a kind of energy-conserving construction bearing wall body
Composite plate, including mold shaping volume insulation material is made module core, and building module building block system is pressed with after the assembling of corresponding steel construction
It is combined into the construction materials such as straight panel and angular module plate core and asbestos fibre cement plate and is combined into composite heat-preserving load-bearing wallboard.Patent
CN200820174390.4 discloses a kind of foam concrete composite board includes foam concrete core, and core middle setting has steel
Or concrete pair muscle, the periphery of core is various shaped steel or concrete frame, and the top surface of framework and core is surface layer.Patent
CN201310284009.5 discloses a kind of overall load bearing heat preserving wallboard and its production construction process, and two surface layers are concrete, are mixed
There is glass fiber mesh on solidifying soil surface, inside there is bar-mat reinforcement, and intermediate layer is foam cement, and reinforcing bar is through foam cement in two surface layers
Bar-mat reinforcement is connected, and surrounding end face is fluted, there is embedded bar connector, and two holes for hoist are arranged at top.In addition patent
CN201120049678.0 composite light-weight high-strength self-heat-conservings building block, CN201320219267.0 multilayer parallels steel wire net rack folder
Core warming plate and a kind of self-insulating concrete house structural body of load bearing heat preserving integrated wall structure, CN200610092167.0
System, CN200710171204.1 self-conserving heat green concrete assembled large panels and preparation method thereof, CN200910099504.2 knots
Structure self-heat-insulation concrete wall plate and preparation method thereof, CN201110215837.4 self-insulation composite concrete self-supporting building blocks,
A kind of Self-heat-insulating concrete building blocks of CN201110364481.0 and a kind of many rounds of patent CN201120399380.2 are without cold-heat bridge
Load-bearing insulation block also takes the technical scheme of the type.
2）Lightweight aggregate and insulation material are added in conventional concrete preparation process.Patent CN200610012726.2 is disclosed
A kind of heat-insulated concrete of kervit micro-beads, its component is glass bead, cement, sand, stone, water, extra material.Patent
CN201210102704.0 discloses a kind of heat-preserving load-bearing regeneration concrete, and the component for using is composite light-weight bone spike, cement, again
Raw fine aggregate, sand, regenerated coarse aggregate, stone, haydite, flyash, water, additive；Described composite light-weight bone spike is that vitreous is micro-
Pearl and the mixture of aeroge.Patent CN200710300076.6 discloses a kind of concrete bearing insulating brick with float stone, cement
And swelling agent and gypsum are primary raw material, by mixing, stirring, extrusion forming concrete bearing insulating brick.Patent
CN201110270949.X discloses self-insulating brick, heat insulation building block and its production technology, is related to a kind of cement base gelling agent to be
Base material, with calcium silicate powder as main thermal insulation materials, can also with vermiculite, diatomite, glass bead one or several
The compound self-insulating brick or heat insulation building block for preparing, producing.Patent CN201110084478.3 discloses a kind of waste fiber
The preparation method of fiber heat-insulating bearing concrete building block, combines insulation material with waste fiber concrete segment, there is provided one kind is certainly
The new type block of insulation blocks.Patent CN201110222693.5 discloses a kind of light granules and fiber concrete series self-insurance
Adiabator, concrete is introduced by the chopped fiber of the closed water repellent particle of lightweight and fine-denier, efficiently solves air entrained concrete and foam
The building material water absorption rate such as concrete is high, low intensity, problems of crack.Patent CN201310557850.7 discloses a kind of self-insurance
Warm concrete, its formula composition for activating and regenerating concrete powder, slag, exciting agent, thin light-weight aggregate, thick light-weight aggregate, aluminium slag.
3）Enhanced foam or air entrained concrete.Patent CN201110419707.2 discloses a kind of for wall self-insulation
Gangue foam concrete building block, by high intensity gangue foam concrete shell and ultra-low-density foam concrete core group
Into.Patent CN201110354321.8 discloses a kind of foam concrete, and key component has cement, fine sand, foaming agent, compensation
Agent, unit weight is 500~1200kg/m3.Patent CN201210388664.0 discloses a kind of plus sand self-heat conserving foamed concrete, its
The material of composition by：Quartz sand, cement, silicon ash, fiber, additive, hydrogen peroxide, water and glue.Patent CN201010620953.X
A kind of method for manufacturing ceramsite self-heat-insulation air-entrapping building block is disclosed, raw materials used is haydite, Tao Fen, cement, flyash, infusion hair
Bubble expansion rate, water, above-mentioned material are mixed into mixer machine cavity and carry out maintenance, the demoulding, cutting after stirring, vibratory compaction.
4）Conventional concrete hollow structure inside.Patent CN200520001776.1 discloses a kind of multi-functional load-bearing and builds
Block, in cubic, there are two to three holes at center, the swallow-tail form tongue and groove for having vertical distribution on its outside surface layer, dovetail
The cell wall of shape tongue and groove and the angle of bottom land are 30-90 degree.
The disclosure of above patent and application, favorably promote the development of China's load bearing heat preserving materials for wall, but still exist
Some problems.1）The sandwich composite construction of conventional concrete or steel construction cladding or filling insulation material.Need at least one
Plant the high-strength material and a kind of insulation material of low thermal conductivity for possessing weight capacity to combine, due to two kinds of material characters
Difference is huge, and combined process is often more complicated, is unfavorable for the control of quality, is likely to occur separates what is come off in use
Phenomenon, gained finished product also tends to that thickness is larger, takes more space.2）Light bone is added in conventional concrete preparation process
Material and insulation material.Needs can be obtained by controlling the species and ratio of lightweight aggregate and insulation material within the specific limits strong
Degree, density and thermal conductivity factor, in practical operation, lightweight aggregate and insulation material are larger with unclassified stores density difference, should not be formed
Mixed uniformly entirety, so as to cause the density of interiors of products, intensity, thermal conductivity factor to be likely to occur skewness, product is because in
The quality problems, weight capacity and heat insulation effect in influence application process such as portion's stress concentration is cracking.3）Enhanced foam or
Air entrained concrete.Existing method can to a certain extent lift original concrete strength, but limited extent, hardly result in intensity
The product of more than 10MPa, while itself also being difficult to reach the requirement of energy-conservation 65%.4）Conventional concrete hollow structure inside.The method
It is generally used for making bearing building block, heat insulation effect is not still good enough.
To solve problem above, the present invention proposes a kind of new load bearing heat preserving concrete and preparation method thereof.
The content of the invention
It is solve the deficiency that traditional load bearing heat preserving concrete is present, the present invention proposes a kind of with entringite as template
Load bearing heat preserving concrete 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, coarse aggregate, fine aggregate, admixture being weighed in proportion, being stirred, premix siccative is obtained；
The mass fraction ratio of the premix siccative composition is Binder Materials：Coarse aggregate：Fine aggregate：Admixture=1 ~ 30:2~
90：：1~400.1~5.
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 fine aggregate includes one or more in fine sand, glass bead, expanded perlite.
The coarse aggregate is included in rubble, cobble, leca, haydites of book structure, lytag, float stone, scoria
One or more.
The admixture includes flyash, blast-furnace cinder, volcanic ash, zeolite powder, vermiculite power, silicon ash, silicon powder, diatom
One or more in soil, bentonite, Concave-convex clay rod, rice hull ash.
（3）Entringite colloid and fiber, additive are mixed, premix wet feed is obtained.
The premix wet feed, its quality of material score ratio is：Entringite colloid：Fiber：Additive=10 ~ 1000:0.1~1：
0.01~10。
Described fibre reinforced materials include glass fibre, polyester fiber, polypropylene fibre, wood-fibred, cellulose fibre,
One or more in sepiolite fibre, brucite fiber.
The additive includes in water reducer, economization agent, waterproofing agent, thickener, pumping admixture, early strength agent, retarder
Plant or several.
（4）Premix siccative is mixed with premix wet feed, mould is injected after stirring and is obtained formation of concrete, conserved.
The premix siccative and premix wet feed mixing, its quality of material score ratio is to premix siccative：Premix wet feed=1 ~
100:1 ~ 100, preferably 1 ~ 0:1~10.
The injection mould molding, obtaining product includes fragment of brick, building block, sheet material and assembled wall part, while may be used also
With cast-in-place shaping at the construction field (site).
The formation of concrete maintenance includes natural curing, steam curing, curing in water, overlay film maintenance.
The mechanism that entringite colloid prepares load bearing heat preserving concrete 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
Blue thick gel material.If it is observation main body to regard entringite, it is considered that entringite particle agglomeration is piled into loosely
Three-dimensional net structure, inside configuration is filled with moisture.Experiment shows that entringite colloid has preferable stability, Ke Yichang
Bottom is not deposited on up to the several months, will not also be recrystallized or be crosslinked and turn into gel, while also certain thixotropy, stands
The agitated rear viscosity of entringite can return to initial level.
Actually it can be appreciated that entringite colloid is the thick colloid between colloidal sol and gel.Colloid it is basic
Particle is 1 ~ 100nm, and the nanoporous skeleton with three-dimensional net structure is bound to each other to form between elementary particle, so, calcium
Aluminite colloid is the toughness material still under shearing force with nano-porous structure.
When bonding agent and other materials mix with entringite colloid, due to colloid toughness and the property sheared, bonding agent
Can be evenly dispersed in colloid with other materials, it is many so as to possess the original nanometer of entringite colloid until progressively hardening
Pore structure.Here it is the template effect that entringite colloid is played in the present invention.
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, the sticky water phase colloidal substance of stabilization 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 load bearing heat preserving concrete of the invention.Below
Describe in detail, the effect that entringite colloid is played in load bearing heat preserving concrete.
It is known that the particle diameter major part of cement is distributed in 3 ~ 45 μm, and to form colloid and generally require below 100nm,
Here it is why when the ratio of mud of cement is higher, most of cement granules can not suspend in water, but directly sink to
Bottom.In other words, we can not obtain the concrete product compared with low-density more by adding water.Low-density can not be realized, just
Cannot realize allowing concrete to possess good heat-insulating property.
As it was previously stated, at present it is existing acquisition light weight concrete method be mainly use foaming technique, aerating technology with
And introduce the material of low-density.But above method, otherwise declined to a great extent as cost with concrete strength, or even cannot be used as load-bearing
Materials for wall is used, or intensity requirement meets, heat-insulating property does not reach requirement again, or intensity and heat-insulating property all reach
To require that, but fire protecting performance and endurance quality do not reach requirement again, in a word, be substantially at fish and bear's paw can not get both faces a difficult choice
Condition.
But, if we are toward adding cement isocolloid material in entringite colloid, though the ratio of cement how much, not
The phenomenon that cement sinks to the bottom or reunites occurs, while cement and the material of other additions can be evenly dispersed in whole entringite
In colloid, and formed largely with similar entringite colloid microcellular structure by the hydration reaction occurred in entringite colloid
Concrete material.Thus we have seen that entringite colloid is served very in the load bearing heat preserving concrete of cement cementitious material
The effect of good template.
When Binder Materials is lime or gypsum, entringite colloid can equally cause that lime, gypsum and unclassified stores are equal
It is even to be dispersed in inside it, when there is hydration reaction in the siliceous material in lime and gypsum and material form rigid porous structures,
Entringite colloid equally serves the effect of good template.
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.
It is violent with cement reaction with Ludox, or even wink solidifying difference, the Binder Materials such as entringite colloid and cement occurs
Reaction it is more gentle, be not in the situation of rapid condensation, in addition entringite colloid finally with Binder Materials hydrated product phase
Mutual reactance crosslinking turns into single entirety, is coated in cement structures rather than by simple physics, and this is also the technology of the present invention
While scheme can significantly reduce concrete density acquisition good heat-insulating property, can realize that load-bearing is protected with higher-strength again
One major reason of temperature.
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, just do not have yet and be due to entringite particle very little, it is impossible to form sticky colloid substances
The Binder Materials such as dispersion cement, play the effect of template.Meanwhile, solubility of the aluminum sulfate in water has certain scope, no
Possible complete miscibility, entringite colloid is also not intended to too much as template from from the point of view of cost.So preferred scheme
It is middle to limit a ratio for preferably aluminum sulfate and lime and water.
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, coarse aggregate, fine aggregate and admixture collocation, can obtain optimal
Concrete strength and other combination properties.
Selection to Binder Materials also affects the maintenance method in product later stage.If selection cement is main gelling material
Material, various concrete curing modes can be applicable.Simultaneously production process can with compatible existing foam cement equipment, except
Foaming agent is instead of with entringite colloid, it is no longer necessary to foaming agent and foaming machine remaining dispensing, mixing, maintenance, cutting, stacking etc.
Equipment is applicable.While completely compatible normal concrete Prefabrication technique and equipment.
If selection lime and gypsum are major gelled material, the preferably efficient steam curing mode of maintenance method.Together
When production process can be remaining dispensing, mixed with compatible air entrained concrete production equipment, except entringite colloid instead of air-entrainment
The equipment such as conjunction, maintenance, cutting, stacking are applicable.
Leca, haydites of book structure, flyash ceramic in glass bead, expanded perlite and coarse aggregate in fine aggregate
Grain, float stone, scoria are lightweight aggregate, can further reduce the density of gained concrete.
Step（3）Entringite colloid and the material ratio of premix siccative mixing, directly affects the density of gained concrete, strong
Degree and thermal conductivity factor.Generally, entringite rubber proportional is higher, concrete density is lower, thermal conductivity factor is lower, intensity also more
Low, vice versa.The addition of additive and reinforcing fiber can improve the anti-of concrete construction workability, pumping and concrete
Aqueous, anti-contracility and durability etc..
By corresponding equipment and mold, by technical solution of the present invention can obtain bearing insulating brick, building block, sheet material and
All kinds of fitted parts, it is also possible to cast-in-place at the construction field (site).
Beneficial effect.
In sum, relative to prior art, the present invention has advantage following prominent.
1）The load bearing heat preserving concrete that the present invention is prepared with entringite colloid as template, with three-dimensional network micropore knot
Structure, up to 10 ~ 50MPa, thermal conductivity factor is 0.1 ~ 0.4w/mk, dry density to intensity<2000kg/m3, do not ftracture, not efflorescence, very
The load bearing heat preserving integration of high-strength light high heat preservation performance of positive reality.
2）The load bearing heat preserving concrete that the present invention is prepared with entringite colloid as template, is purely inorganic material, fire line
Can be good, environment friendly and pollution-free, durability is high, can be with the building same life-span.
3）The load bearing heat preserving concrete that the present invention is prepared with entringite colloid as template, raw material is cheap to be easy to get, technique letter
Single, Material Compatibility is good, and stability is high, and production process is easily controllable, is conducive to automating mass industrialized production.
4）The load bearing heat preserving concrete that is prepared as template with entringite colloid of the present invention, can be prepared into fragment of brick, building block,
The part such as sheet material and assembled stair, wallboard, floor, balcony slab, roof boarding, it is also possible to which job site is cast-in-place, meets different item
Purpose demand.
5）The load bearing heat preserving concrete that the present invention is prepared with entringite colloid as template, can be with the compatible coagulation of aerating at present
Autochthonal production. art, foamed concrete production technology and normal concrete Prefabrication technique, beneficial to turning for conventional concrete industry
Type is upgraded.
Specific embodiment.
The specific embodiment of the load bearing heat preserving concrete that entringite colloid is template is provided below, as to this hair
Bright further description.
Embodiment 1.
Take 6.0kg aluminum sulfate and be dissolved in 20.0kg water, prepare aluminum sulfate solution, take 2.2kg quick limes and be dissolved in 20.0kg water, match somebody with somebody
Limewash processed.Limewash is placed in container, aluminum sulfate solution is slowly added in the case where 200r/min is stirred, until pH value
It is 7.0, obtains translucent entringite colloid.Premix siccative is formulated as follows and mixes：Portland cement 35.0kg, fine sand
38.0kg, glass bead 8.0kg, leca 15.0kg, zeolite powder 1.0kg.By polypropylene fibre 0.5kg and economization agent
0.1kg adds the entringite colloid for making, and wet feed must be premixed after stirring 3min.Premix siccative is added, continues to stir 5min.Will
Gained concrete slurry pours into mould and is made fragment of brick.After natural curing 28d, gained sample dry density 1070kg/m3, intensity
18MPa, thermal conductivity factor 0.18w/mk.
Embodiment 2.
Take 6.5kg aluminum sulfate and be dissolved in 20.0kg water, prepare aluminum sulfate solution, take 2.3kg quick limes and be dissolved in 20.0kg water, match somebody with somebody
Limewash processed.Limewash is placed in container, aluminum sulfate solution is slowly added in the case where 500r/min is stirred, until pH value
It is 7.2, obtains translucent entringite colloid.Premix siccative is formulated as follows and mixes：Portland cement 40.0kg, fine sand
50.0kg, glass bead 8.0kg, cobble 40.0kg, haydites of book structure 20.0kg, silicon powder 1.2kg.By glass fibre 1.0kg and
Waterproofing agent 0.1kg adds the entringite colloid for making, and wet feed must be premixed after stirring 5min.Premix siccative is added, continues to stir
8min.Gained concrete slurry is poured into mould and is made sheet material.After curing in water 28d, gained sample dry density 1310kg/m3,
Intensity 25MPa, thermal conductivity factor 0.20w/mk.
Embodiment 3.
Take 4.0kg aluminum sulfate and be dissolved in 20.0kg water, prepare aluminum sulfate solution, take 1.4kg quick limes and be dissolved in 20.0kg water, match somebody with somebody
Limewash processed.Aluminum sulfate solution is placed in container, limewash is slowly added in the case where 1150r/min is stirred, until pH
It is 7.5 to be worth, and obtains translucent entringite colloid.Premix siccative is formulated as follows and mixes：Sulphate aluminium cement 12.0kg, fine sand
20.0kg, expanded pearlite 15.0kg, haydites of book structure 15.0kg, silicon ash 0.8kg.By brucite fiber 1.0kg and retarder 0.1kg
The entringite colloid that addition makes, wet feed must be premixed after stirring 6min.Premix siccative is added, continues to stir 4min.By gained
Concrete slurry pours into mould and is made abnormity component.After natural curing 14d, gained sample dry density 950kg/m3, intensity
15MPa, thermal conductivity factor 0.14w/mk.
Embodiment 4.
Take 4.5kg aluminum sulfate and be dissolved in 20.0kg water, prepare aluminum sulfate solution, take 1.6kg quick limes and be dissolved in 20.0kg water, match somebody with somebody
Limewash processed.Limewash is placed in container, aluminum sulfate solution is slowly added in the case where 2000r/min is stirred, until pH
It is 7.8 to be worth, and obtains translucent entringite colloid.Premix siccative is formulated as follows and mixes：Portland cement 10.0kg, lime
10.0kg, gypsum 2.0kg, fine sand 28.0kg, glass bead 7.0kg, lytag 15.0kg, volcanic ash 2.0kg.By Hai Pao
Mineral wool 1.0kg and thickener 0.1kg adds the entringite colloid for making, and wet feed must be premixed after stirring 6min.Add premix
Siccative, continues to stir 4min.Gained concrete slurry is poured into mould and is made building block.At 160 DEG C after steam curing 8h, gained sample
Product dry density 890kg/m3, intensity 12MPa, thermal conductivity factor 0.12w/mk.
Embodiment 5.
Take 7.0kg aluminum sulfate and be dissolved in 20.0kg water, prepare aluminum sulfate solution, take 2.5kg quick limes and be dissolved in 20.0kg water, match somebody with somebody
Limewash processed.Limewash is placed in container, aluminum sulfate solution is slowly added in the case where 80r/min is stirred, until pH value
It is 7.1, obtains translucent entringite colloid.Premix siccative is formulated as follows and mixes：Portland cement 45.0kg, fine sand
50.0kg, glass bead 5.0kg, rubble 60.0kg, haydites of book structure 30.0kg, silicon ash 5.0kg.Polyester fiber 1.0kg and will subtract
Contracting agent 0.1kg adds the entringite colloid for making, and wet feed must be premixed after stirring 6min.Premix siccative is added, continues to stir
10min.Gained concrete slurry is poured into mould and is made sheet material.At room temperature after plastic covering membrane curing 28d, gained sample is done
Density 1480kg/m3, intensity 36MPa, thermal conductivity factor 0.24w/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 (10)
1. the preparation method of a kind of load bearing heat preserving concrete with entringite as template, it is characterized in that, preparation process include with
Lower step：
（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 aggregate, coarse aggregate, admixture being weighed in proportion, being stirred, premix siccative is obtained；
The mass fraction ratio of the premix siccative composition is Binder Materials：Fine aggregate：Coarse 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 fine aggregate includes one or more in fine sand, glass bead, expanded perlite；
The coarse aggregate includes the one kind in rubble, cobble, leca, haydites of book structure, lytag, float stone, scoria
Or it is several；
The admixture includes flyash, blast-furnace cinder, volcanic ash, zeolite powder, vermiculite power, silicon ash, silicon powder, diatomite, swollen
Profit soil, Concave-convex clay rod, one or more in rice hull ash；
（3）Entringite colloid and fiber, additive are mixed, premix wet feed is obtained；
The premix wet feed, its quality of material score ratio is entringite colloid：Fiber：Additive=10 ~ 1000:0.1~1：0.01~
10；
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；
The additive include water reducer, economization agent, waterproofing agent, thickener, pumping admixture, early strength agent, retarder in one kind or
It is several；
（4）Premix siccative is mixed with premix wet feed, mould is injected after stirring and is obtained formation of concrete, conserved；
The premix siccative and premix wet feed mixing, its quality of material score ratio is to premix siccative：Premix wet feed=1 ~ 100:1~
100；
The formation of concrete, including fragment of brick, building block, sheet material and assembled stair, wallboard, floor, balcony slab, roofing plate portion
Part, while can also cast-in-place shaping at the construction field (site).
2. preparation method according to claim 1, it is characterized in that step（1）The entringite colloid, by aluminum sulfate and stone
Ash reaction generation is 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, then both are mixed, the lime includes quick lime or ripe
Lime, aluminum sulfate is 1 ~ 50 with water quality fraction:100, quick lime is 1 ~ 100 with the mass fraction of water:100.
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（2）The fine aggregate includes glass bead, expansion
One or more in perlite.
6. preparation method according to claim 1, it is characterized in that step（2）The coarse aggregate includes leca, shale
One or more in haydite, lytag, float stone, scoria.
7. preparation method according to claim 1, it is characterized in that step（2）The cement includes portland cement, aluminic acid
Salt cement, sulphate aluminium cement.
8. preparation method according to claim 1, it is characterized in that step（4）The premix siccative and premix wet feed mixing,
Its quality of material score ratio is to premix siccative：Premix wet feed=1 ~ 10:1~10.
9. preparation method according to claim 1, it is characterized in that step（4）The formation of concrete maintenance includes that nature is supported
Shield, steam curing, curing in water, overlay film maintenance.
10. a kind of load bearing heat preserving concrete with entringite as template, it is characterized in that, the concrete is with entringite viscous fluid
Template has three-dimensional network microcellular structure, and up to 10 ~ 50MPa, thermal conductivity factor is 0.1 ~ 0.4w/mk, dry density to intensity<
2000kg/m3。
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| CN106365482B (en) * | 2016-08-30 | 2018-06-08 | 河南理工大学 | A kind of ultra-fine entringite, preparation method and its application in cement based grouting material |
| CN106639019A (en) * | 2016-12-15 | 2017-05-10 | 南京市消防工程有限公司宜兴安装分公司 | Fireproof cement board |
| CN106699060A (en) * | 2016-12-26 | 2017-05-24 | 安徽新瑞重工股份有限公司 | Assembly concrete prefabricated wallboard material using ettringite as template agent |
| CN106882940A (en) * | 2017-03-29 | 2017-06-23 | 广西棕海园林工程有限公司 | Concrete |
| CN107244835A (en) * | 2017-06-13 | 2017-10-13 | 合肥大麦灯箱器材有限公司 | A kind of construction material and preparation method thereof |
| CN107188470A (en) * | 2017-06-22 | 2017-09-22 | 合肥励仙电力工程有限公司 | A kind of insulation material for being used to decorate and preparation method thereof |
| CN108609976A (en) * | 2018-05-23 | 2018-10-02 | 河南有巢氏环保材料有限公司 | A kind of haydite perlite heat insulation building block and preparation method thereof |
| CN110282935B (en) * | 2019-08-01 | 2021-09-24 | 西安新意达建筑制品有限公司 | Fiber-reinforced concrete and preparation method thereof |
| CN114735982B (en) * | 2022-05-05 | 2023-09-05 | 中国建筑材料科学研究总院有限公司 | Anti-carbonization concrete and forming method and application thereof |
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| CN101265070A (en) * | 2008-04-17 | 2008-09-17 | 高康 | Sludge solidifying agent and application thereof |
| CN102452805A (en) * | 2010-10-20 | 2012-05-16 | 新疆研科节能科技有限公司 | Mineral admixture for high durable concrete |
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