CN104649632A - Phase-change energy-storage temperature-regulation foam concrete and preparation method thereof - Google Patents
Phase-change energy-storage temperature-regulation foam concrete and preparation method thereof Download PDFInfo
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- CN104649632A CN104649632A CN201510029074.2A CN201510029074A CN104649632A CN 104649632 A CN104649632 A CN 104649632A CN 201510029074 A CN201510029074 A CN 201510029074A CN 104649632 A CN104649632 A CN 104649632A
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Abstract
The invention discloses a phase-change energy-storage temperature-regulation foam concrete and a preparation method thereof, wherein the phase-change energy-storage temperature-regulation foam concrete comprises the following components in parts by weight: 70-100 parts of cement, 0-30 parts of fly ash, 10-50 parts of phase-change lightweight aggregate, 0-0.6 part of fiber, 0.2-0.4 part of water reducing agent, 0.1-0.3 part of cell regulator, 0.1-0.3 part of early strength agent, 0-1.5 parts of reinforcing agent, 0-3 parts of waterproof agent, 2-9 parts of chemical foaming agent and 25-40 parts of water. Therefore, the phase-change energy-storage temperature-regulation foam concrete has strong heat storage capacity and a temperature regulation function.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of phase-change energy-storage temperature adjustment foamed concrete and preparation method thereof.
Background technology
In the human society development course of several thousand, the overwhelming majority time is all adopt passive type means to regulate indoor thermal environment, as Passive use sun power winter heating, utilizes natural ventilation to carry out summer air-conditioning.The common feature that passive type regulates is the temperature regulation characteristic relying on architectural exterior-protecting construction self, makes full use of renewable natural energy resources and improves indoor thermal environment.This kind of traditional architecture uses heavy material to build mostly, and heat storage capacity is comparatively strong, and thermal lag is comparatively large, effectively can suppress fluctuations in indoor temperature, cool in summer and warm in winter, and the kiln as North Shaanxi occupies building.
But, in modern architecture especially Highrise buildings, lightweight building enclosure obtains to be applied more and more widely, this is mainly because lightweight building enclosure not only can alleviate the self load bearing of building structure greatly, and because having good thermal resistance, the heat insulating effect of architectural exterior-protecting construction can be improved.But because the thermal capacitance of lightweight building enclosure is little, heat storage capacity is poor, the solar radiant heat on storage daytime cannot be absorbed in a large number, cause room temp too high for daytime, night is too low, and day and night fluctuation is large, thermal comfort is poor, and causes the increase of air-conditioning and heating energy consumption thus, is unfavorable for building energy conservation.
Foamed concrete is the novel building space enclosing structure material applied in China gradually in recent years, be mainly used in the heat insulating engineering at the position such as skeleton construction infilled wall, non-load bearing inner partition wall and roofing, exterior wall, ground, have lightweight, insulation, heat insulation, insulate against sound, do not fire, resistance to premium properties of waiting so long, be one of energy-saving building materials most with prospects.But because foamed concrete is light porous, have the shortcoming that thermal capacitance is little, accumulation of heat is poor equally, cause indoor thermal comfort poor when being applied to architectural exterior-protecting construction, the further genralrlization constraining it uses.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least to a certain extent.For this reason, the present invention proposes a kind of phase-change energy-storage temperature adjustment foamed concrete with stronger heat storage capacity and temperature adjustment function and preparation method thereof.
According to an aspect of the present invention, the present invention proposes a kind of phase-change energy-storage temperature adjustment foamed concrete, comprising: the cement of 70-100 weight part; The flyash of 0-30 weight part; The phase transformation light skeletal of 10-50 weight part; The fiber of 0-0.6 weight part; The water reducer of 0.2-0.4 weight part; The cell modifiers of 0.1-0.3 weight part; The hardening accelerator of 0.1-0.3 weight part; The toughener of 0-1.5 weight part; The water-resisting agent of 0-3 weight part; The chemical foaming agent of 2-9 weight part; And the water of 25-40 weight part.
Thus, in the phase-change energy-storage temperature adjustment foamed concrete of the above embodiment of the present invention, there is phase transformation light skeletal, thus the heat storage capacity of foamed concrete is increased, make it have energy storage and temperature adjustment function, and then can overcome when light building material is applied to architectural exterior-protecting construction and there is the poor weakness of thermal lag.Phase-change energy-storage temperature adjustment foamed concrete major matrix material is cement-based material, has the burning grade being not less than B1 level, when controlling phase transformation light skeletal content and being lower, can reach A level and not fire level, have excellent fire savety.In addition, the phase-change energy-storage temperature adjustment foamed concrete of above-described embodiment can utilize phase transformation Process of absorption or liberation of heat principle, play incubation and thermal insulation function and then for heat insulating engineering, light weight board is can be made into when its apparent density is less, for the heat insulating at the positions such as roofing, metope, ground, wallboard or building block product is can be made into, for skeleton construction infilled wall and non-load bearing inner partition wall when its apparent density is larger.
In addition, phase-change energy-storage temperature adjustment foamed concrete according to the above embodiment of the present invention can also have following additional technical characteristic:
In some embodiments of the invention, described phase-change energy-storage temperature adjustment foamed concrete apparent density is 120-850kg/m
3, ultimate compression strength is 0.2-4MPa, and thermal conductivity is 0.045-0.22W/ (mK), and volume water absorption rate is 4-10%, and latent heat of phase change is 2500-9500kJ/m
3.
In some embodiments of the invention, described cement is ordinary Portland cement; Described flyash is I level and/or II level flyash; Described fiber is polypropylene fibre; Described water reducer is polycarboxylate water-reducer; Described cell modifiers is the mixture of Vltra tears and xanthan gum; Described hardening accelerator is at least one in calcium chloride, Quilonum Retard and anhydrous sodium sulphate; Described toughener is at least one in polyvinyl alcohol, redispersable latex powder and vinyl acetate-ethylene copolymer emulsion; Described water-resisting agent is waterproofing agent of organosilicon and/or stearate; Described chemical foaming agent is hydrogen peroxide,
Optionally, the strength grade of described ordinary Portland cement is not less than 42.5; In described flyash, the content of calcium oxide is greater than 10%; The length of described polypropylene fibre is 6-12 millimeter; The water-reducing rate of described polycarboxylate water-reducer is not less than 30%.
In some embodiments of the invention, in described cell modifiers, the weight ratio of Vltra tears and xanthan gum is 1:2.
In some embodiments of the invention, described phase transformation light skeletal, comprising:
Porous matrix material;
Phase change material, described phase change material is carried in described porous matrix material, to form phase transformation light skeletal skeleton structure;
Coating material, the outside surface of the coated described phase transformation light skeletal skeleton structure of described coating material,
Wherein, the transformation temperature of described phase transformation light skeletal is 18-50 degree Celsius,
Optionally, the weight ratio of described phase change material and described porous matrix material is not less than 40:60, is preferably (40-60): (60-40),
Optionally, described porous matrix material is at least one in pearlstone, expanded vermiculite, zeolite and Superlight ceramsites,
Optionally, described phase change material is at least one in alkane, polyvalent alcohol, fatty acid, alcohols and ester class,
Optionally, described coating material is at least one during polymer emulsion, resin solution and polymer cement are starched only.
According to another aspect of the present invention, the invention allows for a kind of method preparing phase-change energy-storage temperature adjustment foamed concrete noted earlier, comprising:
By the cement of 70-100 weight part; The flyash of 0-30 weight part; The fiber of 0-0.6 weight part; The water reducer of 0.2-0.4 weight part; The cell modifiers of 0.1-0.3 weight part; The hardening accelerator of 0.1-0.3 weight part; The toughener of 0-1.5 weight part; The water-resisting agent of 0-3 weight part; And the water of 25-40 weight part carries out the first mix and blend, only to be starched;
In described clean slurry, add the phase transformation light skeletal of 10-50 weight part and the chemical foaming agent of 2-9 weight part and carry out the second mix and blend, to obtain clean pulp mixture; And
Described clean pulp mixture to be built in mould and to carry out one section of maintenance; And
The described clean pulp mixture through described one section of maintenance is carried out the demoulding and carries out two sections of maintenances, to obtain described phase-change energy-storage temperature adjustment foamed concrete.
Thus, utilize aforesaid method, effectively can prepare the phase-change energy-storage temperature adjustment foamed concrete with stronger heat storage capacity and temperature adjustment function.The process employs phase transformation light skeletal, thus increase the heat storage capacity of foamed concrete, and make it have energy storage and temperature adjustment function, and then can overcome when light building material is applied to architectural exterior-protecting construction and there is the poor weakness of thermal lag.Meanwhile, this phase-change energy-storage temperature adjustment foamed concrete may be used for building heat preservation insulation contractors, can be made into light weight board when apparent density is less, for the heat insulating at the positions such as roofing, metope, ground; Wallboard or building block product is can be made into, for skeleton construction infilled wall and non-load bearing inner partition wall when apparent density is larger.
In addition, the method preparing phase-change energy-storage temperature adjustment foamed concrete according to the above embodiment of the present invention can also have following additional technical characteristic:
In some embodiments of the invention, the time of described first mix and blend is 1-3 minute,
Optionally, the interval time adding phase transformation light skeletal and chemical foaming agent in described clean slurry is not less than 10 seconds,
Optionally, the time of described second mix and blend is 6-12 second.
In some embodiments of the invention, described one section of maintenance and described two sections of maintenances are all carry out under temperature is 18-22 degree Celsius and humidity is the condition being greater than 95%, and described one section of curing time is 24 hours, and described two sections of curing times are 7-28 days.
In some embodiments of the invention, described phase transformation light skeletal is obtained by following method:
Porous matrix material is carried out drying, to obtain dry porous matrix material;
Phase change material is heated, to obtain molten state phase change material;
The porous matrix material of described drying and described molten state phase change material are carried out mixing in vacuum reaction still and reduced pressure treatment, to obtain phase transformation light skeletal skeleton structure;
By described phase transformation light skeletal skeleton structure cooling; And
Coating material is utilized to be undertaken coated and dry by the described phase transformation light skeletal skeleton structure of cooling, to obtain phase transformation light skeletal,
Optionally, the weight ratio of the porous matrix material of described molten state phase change material and described drying is not less than 40:60, is preferably (40-60): (60-40).
In some embodiments of the invention, the temperature of described drying is 80 degrees Celsius, and the time is 24 hours,
Optionally, the pressure in described vacuum reaction still is 0.08-0.1MPa, temperature for being greater than 50 degrees Celsius,
Optionally, described coated be that single-material is coated or several coating material superposition layering is coated.
Embodiment
According to an aspect of the present invention, the present invention proposes a kind of phase-change energy-storage temperature adjustment foamed concrete.According to a particular embodiment of the invention, this phase-change energy-storage temperature adjustment foamed concrete comprises: the cement of 70-100 weight part; The flyash of 0-30 weight part; The phase transformation light skeletal of 10-50 weight part; The fiber of 0-0.6 weight part; The water reducer of 0.2-0.4 weight part; The cell modifiers of 0.1-0.3 weight part; The hardening accelerator of 0.1-0.3 weight part; The toughener of 0-1.5 weight part; The water-resisting agent of 0-3 weight part; The chemical foaming agent of 2-9 weight part; And the water of 25-40 weight part.
Thus, in the phase-change energy-storage temperature adjustment foamed concrete of the above embodiment of the present invention, there is phase transformation light skeletal, thus the heat storage capacity of foamed concrete is increased, make it have energy storage and temperature adjustment function, and then can overcome when light building material is applied to architectural exterior-protecting construction and there is the poor weakness of thermal lag.Phase-change energy-storage temperature adjustment foamed concrete major matrix material is cement-based material, has the burning grade being not less than B1 level, when controlling phase transformation light skeletal content and being lower, can reach A level and not fire level, have excellent fire savety.In addition, the phase-change energy-storage temperature adjustment foamed concrete of above-described embodiment can utilize phase transformation Process of absorption or liberation of heat principle, play incubation and thermal insulation function and then for heat insulating engineering, can be made into light weight board when apparent density is less, for the heat insulating at the positions such as roofing, metope, ground; Wallboard or building block product is can be made into, for skeleton construction infilled wall and non-load bearing inner partition wall when apparent density is larger.
According to a particular embodiment of the invention, the cement adopted in above-mentioned phase-change energy-storage temperature adjustment foamed concrete can for ordinary Portland cement, preferably can for grade be not less than 42.5 ordinary Portland cement.Adopt this cement can ensure intensity and the weather resistance of phase-change energy-storage temperature adjustment foamed concrete as body material thus.
According to a particular embodiment of the invention, above-mentioned flyash is I level and/or II level flyash.Glass microballon containing high level in this I level adopted thus and/or II level flyash, makes the shape effect effect of flyash remarkable, effectively can reduce water consumption, improve degree of mobilization; Preferably, in above-mentioned flyash, CaO content is greater than 10% simultaneously.Adopt this flyash can ensure its secondary reaction of hydration effect thus, and then play the effect improving phase-change energy-storage temperature adjustment foamed concrete later strength.
According to a particular embodiment of the invention, above-mentioned fiber is polypropylene fibre.Adopting this fiber can form three-dimensional net structure in matrix thus, for bearing the tensile stress that base shrinks produces, reducing cracking.Preferably, above-mentioned fiber is the polypropylene fibre of length 6-12 millimeter.Adopt this polypropylene fibre can improve the reinforced effects of fiber in phase-change energy-storage temperature adjustment foamed concrete further thus, and then improve the splitting resistance of phase-change energy-storage temperature adjustment foamed concrete.
According to a particular embodiment of the invention, above-mentioned water reducer is polycarboxylate water-reducer.Adopt this polycarboxylate water-reducer can overcome because a large amount of phase transformation light skeletal of admixture is to the negative impact of fluidity of slurry thus, improve slip degree of mobilization, increase phase-change energy-storage temperature adjustment foamed concrete intensity.Preferably, above-mentioned polycarboxylate water-reducer water-reducing rate is not less than 30%.Adopt this polycarboxylate water-reducer can improve water-reducing effect further thus, and then improve phase-change energy-storage temperature adjustment foamed concrete slip mobility and the rear intensity of sclerosis.
According to a particular embodiment of the invention, above-mentioned cell modifiers is the mixture of Vltra tears and xanthan gum.Adopt this mixture can adjust the viscoelastic degree of gelling material thus, by the difference of gelling material viscous force, it produces different restraint forces to bubble, just can affect the stressed of bubble, change the generation of bubble and expansion process, thus reach control bubble aperture effect.Preferably, in above-mentioned cell modifiers, the weight ratio of Vltra tears and xanthan gum can be 1:2.The effect controlling bubble aperture can be improved thus further.
According to a particular embodiment of the invention, above-mentioned hardening accelerator is at least one in calcium chloride, Quilonum Retard and anhydrous sodium sulphate; Adopt this hardening accelerator can promote cement early hydration thus, improve phase-change energy-storage temperature adjustment foamed concrete early strength.
According to a particular embodiment of the invention, above-mentioned toughener is at least one in polyvinyl alcohol, redispersable latex powder and vinyl acetate-ethylene copolymer emulsion; Adopt this toughener by the space crosslinked action of polymkeric substance, foaming slip force of cohesion can be increased, improve the stability of foaming thus.
According to a particular embodiment of the invention, above-mentioned water-resisting agent is waterproofing agent of organosilicon and/or stearate.Adopt this water-resisting agent can form hydrophobicity network structure in phase-change energy-storage temperature adjustment foamed concrete inside thus, and then form hydrophobic film on its surface, change phase-change energy-storage temperature adjustment foamed concrete water-wet behavior, improve waterproof ability.
According to a particular embodiment of the invention, above-mentioned chemical foaming agent is hydrogen peroxide.Adopt this chemical foaming agent in the alkaline environment of foaming slip, initiatively can generate oxygen thus, and uniform in foaming, being easy to control, by regulating the volume of this chemical foaming agent, the phase-change energy-storage temperature adjustment foamed concrete of different apparent density can being prepared.
According to a particular embodiment of the invention, above-mentioned phase transformation light skeletal, comprising: porous matrix material; Phase change material, described phase change material is carried in described porous matrix material, to form phase transformation light skeletal skeleton structure; Coating material, the outside surface of the coated described phase transformation light skeletal skeleton structure of described coating material.Wherein, the transformation temperature of described phase transformation light skeletal is 18-50 degree Celsius.The phase transformation light skeletal thus with said structure can give the significant energy storage of above-mentioned phase-change energy-storage temperature adjustment foamed concrete and temperature adjustment function.
According to a particular embodiment of the invention, above-mentioned phase transformation light skeletal is that load has phase change material and through surface coated porous matrix material.Adopt the phase transformation light skeletal of this structure can utilize absorption and the skeletal support effect of porous matrix material thus, phase change material is stablized therein and carries out solid-liquid phase change reaction, undertaken suitably encapsulating coated process by effects on surface simultaneously, phase change material generation seepage can be avoided, and then ensure that the long-lasting of phase transformation light skeletal energy-saving and temperature-regulating function.
According to a particular embodiment of the invention, above-mentioned porous matrix material is at least one in pearlstone, expanded vermiculite, zeolite and Superlight ceramsites.Adopt this porous matrix material can play its absorption and skeletal support effect further thus.
According to a particular embodiment of the invention, above-mentioned phase change material is at least one in alkane, polyvalent alcohol, fatty acid, alcohols and ester class.Adopt this phase change material can play phase-change energy-storage temperature adjustment effect thus.Preferably, the weight ratio of described phase change material and described porous matrix material is not less than 40:60, is more preferably (40-60): (60-40).Improve the potential heat value of unit mass phase transformation light skeletal thus further, give full play to energy storage and thermoregulatory effect, and phase change material seepage does not occur.When weight ratio is less than 40:60, the effect of phase transformation light skeletal energy-saving and temperature-regulating is not obvious, when weight ratio is greater than 60:40, phase change material can not steady load in porous matrix material, easily there is seepage.
According to a particular embodiment of the invention, above-mentioned coating material is at least one during polymer emulsion, resin solution and polymer cement are starched only.Adopt this coating material effectively can avoid the seepage of phase change material thus, and then ensure that the long-lasting of phase transformation light skeletal energy-saving and temperature-regulating function.
According to a particular embodiment of the invention, the phase-change energy-storage temperature adjustment foamed concrete with said components and component concentration has good mechanical property, energy-saving and temperature-regulating function, particularly, showing as above-mentioned phase-change energy-storage temperature adjustment foamed concrete apparent density is 120-850kg/m
3, ultimate compression strength is 0.2-4MPa, and thermal conductivity is 0.045-0.22W/ (mK), and volume water absorption rate is 4-10%, and latent heat of phase change is 2500-9500kJ/m
3.The novel building cladding adopting this phase-change energy-storage temperature adjustment foamed concrete to prepare thus may be used for heat insulating engineering, can be made into light weight board when apparent density is less, for the heat insulating at the positions such as roofing, metope, ground; Wallboard or building block product is can be made into, for skeleton construction infilled wall and non-load bearing inner partition wall when apparent density is larger.
According to another aspect of the present invention, the present invention proposes a kind of method preparing phase-change energy-storage temperature adjustment foamed concrete noted earlier, the method comprises: by the cement of 70-100 weight part; The flyash of 0-30 weight part; The fiber of 0-0.6 weight part; The water reducer of 0.2-0.4 weight part; The cell modifiers of 0.1-0.3 weight part; The hardening accelerator of 0.1-0.3 weight part; The toughener of 0-1.5 weight part; The water-resisting agent of 0-3 weight part; And the water of 25-40 weight part carries out the first mix and blend, only to be starched;
In described clean slurry, add the phase transformation light skeletal of 10-50 weight part and the chemical foaming agent of 2-9 weight part and carry out the second mix and blend, to obtain clean pulp mixture; And described clean pulp mixture to be built in mould and to carry out one section of maintenance; And the described clean pulp mixture through described one section of maintenance carried out the demoulding and carries out two sections of maintenances, to obtain described phase-change energy-storage temperature adjustment foamed concrete.
Thus, utilize aforesaid method, effectively can prepare the phase-change energy-storage temperature adjustment foamed concrete with stronger heat storage capacity and temperature adjustment function.The process employs phase transformation light skeletal, thus increase the heat storage capacity of foamed concrete, and make foamed concrete be provided with energy storage and temperature adjustment function, and then can overcome when light building material is applied to architectural exterior-protecting construction and there is the poor weakness of thermal lag.The novel building cladding simultaneously adopting this phase-change energy-storage temperature adjustment foamed concrete to prepare may be used for heat insulating engineering, can be made into light weight board when apparent density is less, for the heat insulating at the positions such as roofing, metope, ground; Wallboard or building block product is can be made into, for skeleton construction infilled wall and non-load bearing inner partition wall when apparent density is larger.
According to a particular embodiment of the invention, the time of above-mentioned first mix and blend is 1-3 minute.Slip can fully mix thus, and keeps suitable foaming denseness.When being less than 1 minute upon agitation, material can not fully mix, and when being greater than 3 minutes upon agitation, the quickening gradually due to hydration reaction makes slip denseness start obvious increase, and mobility reduces.
According to a particular embodiment of the invention, 10 seconds are not less than the above-mentioned interval time adding phase transformation light skeletal and chemical foaming agent in described clean slurry.Phase transformation light skeletal fully can mix before adding chemical foaming agent thus, avoid because of chemical foaming agent add after slip retrogradation affect the dispersed of phase transformation light skeletal.
According to a particular embodiment of the invention, the time of above-mentioned second mix and blend is 6-12 second.Chemical foaming agent can fully be uniformly dispersed thus, and slip keeps suitable denseness.When being less than 6 seconds upon agitation, chemical foaming agent can not be uniformly dispersed, and when being greater than 12 seconds upon agitation, the decomposition due to chemical foaming agent makes slip multiviscosisty aggravate, and affects casting performance.
According to a particular embodiment of the invention, above-mentioned one section of maintenance and two sections of maintenances are all carry out under temperature is 18-22 degree Celsius and humidity is the condition being greater than 95%, and described one section of curing time is 24 hours, and described two sections of curing times are 7-28 days.Abundant aquation and the gain in strength of phase-change energy-storage temperature adjustment foamed concrete can be ensured thus.
According to a particular embodiment of the invention, above-mentioned phase transformation light skeletal can be obtained by following method: porous matrix material is carried out drying, to obtain dry porous matrix material; Phase change material is heated, to obtain molten state phase change material; The porous matrix material of described drying and described molten state phase change material are carried out mixing in vacuum reaction still and reduced pressure treatment, to obtain phase transformation light skeletal skeleton structure; By described phase transformation light skeletal skeleton structure cooling; And utilize coating material to be undertaken coated and dry, to obtain phase transformation light skeletal by the described phase transformation light skeletal skeleton structure of cooling.
Adopt the method effectively can prepare above-mentioned phase transformation light skeletal, owing to which employs porous matrix material, absorption and the skeletal support effect of porous matrix material can be utilized, phase change material is stablized therein and carries out solid-liquid phase change reaction; Undertaken suitably encapsulating coated process by effects on surface simultaneously, phase change material generation seepage can be avoided, and then ensure that the long-lasting of phase transformation light skeletal energy-saving and temperature-regulating function.The above-mentioned phase-change energy-storage temperature adjustment foamed concrete adopting this phase transformation light skeletal to prepare in addition not only increases heat storage capacity, but also be provided with energy storage and temperature adjustment function, and then the building enclosure material utilizing above-mentioned phase-change energy-storage temperature adjustment foamed concrete to prepare can overcome when light building material is applied to architectural exterior-protecting construction and there is the poor weakness of thermal lag, be conducive to heat insulating further.
According to a particular embodiment of the invention, above-mentioned molten state phase change material is not less than 40:60 with the weight ratio of dry porous matrix material, is preferably (40-60): (60-40).The phase transformation light skeletal adopting this weight ratio to prepare thus can improve phase-change energy-storage temperature adjustment effect further, and ensures phase change material stable existence in porous matrix material.When weight ratio is less than 40:60, phase-change energy-storage temperature adjustment effect is not obvious, when weight ratio is greater than 60:40, phase change material can not steady load in porous matrix material, easily there is seepage.
According to a particular embodiment of the invention, the temperature of above-mentioned drying is 80 degrees Celsius, and the time is 24 hours.Effectively can carry out drying treatment to porous matrix material thus, and then be convenient to molten state phase change material and enter in the hole of porous matrix material, improve the phase transformation light skeletal energy-saving and temperature-regulating effect prepared.
According to a particular embodiment of the invention, the pressure in above-mentioned vacuum reaction still is 0.08-0.1MPa, and temperature is for being greater than 50 degrees Celsius.The molten state of phase change material can be maintained thus, be convenient to molten state phase change material and enter in the hole of porous matrix material.
According to a particular embodiment of the invention, above-mentioned coated be that single-material is coated or several coating material superposition layering is coated.
Particularly, the preparation method of the present invention's phase transformation light skeletal used can be: to mix by a certain percentage with fused solution phase change material be placed in vacuum reaction still by drying the porous matrix material of 24 hours through 80 degrees Celsius, stir and heated material, ensure that reactor temperature is higher than phase change material fusing point, open vacuum pump, 10 minutes are vacuumized under 0.08-0.1MPa negative pressure, venting, continue to vacuumize, venting, circulation like this 5-10 time, discharging, cooling, coated, coated material therefor is polymer emulsion, resin solution or polymer cement are starched only, can single-material coated or different materials superposition layering coated, coated rear drying or maintenance 24 hours, obtain phase transformation light skeletal.
Embodiment 1
Raw material: ordinary Portland cement 90 parts, 10 parts, II level flyash, expanded pearlite batholith phase transformation light skeletal 30 parts, fiber 0.3 part, polycarboxylate water-reducer 0.2 part, Vltra tears and xanthan gum (weight ratio 1:2) 0.15 part, Quilonum Retard 0.3 part, polyvinyl alcohol 0.3 part, sodium stearate 1.5 parts, 9 parts, hydrogen peroxide, mixing water 40 parts.
The preparation method of expanded pearlite batholith phase transformation light skeletal: by pearlstone and the fused solution Octadecane of drying 24 hours through 80 degrees Celsius in mass ratio 50:50 mix and be placed in vacuum reaction still, stir and heated material, ensure that reactor temperature is higher than phase change material fusing point, open vacuum pump, 10 minutes are vacuumized under 0.08-0.1MPa negative pressure, venting, continue to vacuumize, venting, circulation like this 7 times, discharging, cooling, polymer emulsion and resin solution is adopted to carry out double-coated respectively successively, coated rear drying or maintenance 24 hours, obtain expanded pearlite batholith phase transformation light skeletal.
Preparation method:
(1) by above-mentioned ordinary Portland cement, II level flyash, fiber, polycarboxylate water-reducer, Vltra tears and xanthan gum (weight ratio 1:2), Quilonum Retard, polyvinyl alcohol, sodium stearate, add stirrer for mixing even, then add mixing water, stir and within 3 minutes, become clean slurry;
(2) the above-mentioned expanded pearlite batholith phase transformation light skeletal prepared is added in stirrer stirred for 10 seconds after add above-mentioned hydrogen peroxide, after continuing stirring 6 second, fast pouring to inwall scribbles in the mould of releasing agent;
(3) mould is put into temperature 20 ± 2 degrees Celsius, humidity is greater than 95% normal curing indoor and carries out maintenance, the demoulding after 24 hours, continue maintenance in such circumstances 28 days.
The above-mentioned phase-change energy-storage temperature adjustment foamed concrete prepared has energy-saving and temperature-regulating effect, and its apparent density is 190kg/m
3, ultimate compression strength is 0.4MPa, and thermal conductivity is 0.058W/ (mK), and volume water absorption rate is 8%, and latent heat of phase change is 3500kJ/m
3.
Embodiment 2
Raw material: ordinary Portland cement 80 parts, 20 parts, I level flyash, expanded vermiculite base phase transformation light skeletal 20 parts, fiber 0.4 part, polycarboxylate water-reducer 0.2 part, Vltra tears and xanthan gum (weight ratio 1:2) 0.2 part, 0.3 part, calcium chloride, redispersable latex powder 0.6 part, potassium stearate 1.5 parts, 7.5 parts, hydrogen peroxide, mixing water 38 parts.
The preparation method of expanded vermiculite base phase transformation light skeletal: by expanded vermiculite and the fused solution polyethylene glycol-800 of drying 24 hours through 80 degrees Celsius in mass ratio 45:55 mix and be placed in vacuum reaction still, stir and heated material, ensure that reactor temperature is higher than phase change material fusing point, open vacuum pump, 10 minutes are vacuumized under 0.08-0.1MPa negative pressure, venting, continue to vacuumize, venting, circulation like this 7 times, discharging, cooling, polymer emulsion and resin solution is adopted to carry out double-coated respectively successively, coated rear drying or maintenance 24 hours, obtain expanded vermiculite base phase transformation light skeletal.
Preparation method is with embodiment 1.
The above-mentioned phase-change energy-storage temperature adjustment foamed concrete prepared has energy-saving and temperature-regulating effect, and its apparent density is 230kg/m
3, ultimate compression strength is 0.6MPa, and thermal conductivity is 0.063W/ (mK), and volume water absorption rate is 7.5%, and latent heat of phase change is 2950kJ/m
3.
Embodiment 3
Raw material: ordinary Portland cement 70 parts; 30 parts, II level flyash; Superlight ceramsites base phase transformation light skeletal 45 parts, fiber 0.5 part, water reducer 0.3 part; Vltra tears and xanthan gum (weight ratio 1:2) 0.25 part; anhydrous sodium sulphate 0.2 part, vinyl acetate-ethylene copolymer emulsion 1.2 parts, waterproofing agent of organosilicon 0.2 part; 6 parts, hydrogen peroxide, mixing water 32 parts.
The preparation method of Superlight ceramsites base phase transformation light skeletal: by Superlight ceramsites and the fused solution n-dodecanol of drying 24 hours through 80 degrees Celsius in mass ratio 60:40 mix and be placed in vacuum reaction still, stir and heated material, ensure that reactor temperature is higher than phase change material fusing point, open vacuum pump, 10 minutes are vacuumized under 0.08-0.1MPa negative pressure, venting, continue to vacuumize, venting, circulation like this 7 times, discharging, cooling, polymer emulsion and resin solution is adopted to carry out double-coated respectively successively, coated rear drying or maintenance 24 hours, obtain Superlight ceramsites base phase transformation light skeletal.
Preparation method is with embodiment 1.
The above-mentioned phase-change energy-storage temperature adjustment foamed concrete prepared has energy-saving and temperature-regulating effect, and its apparent density is 340kg/m
3, ultimate compression strength is 1.1MPa, and thermal conductivity is 0.085W/ (mK), and volume water absorption rate is 6%, and latent heat of phase change is 4850kJ/m
3.
Embodiment 4
Raw material: ordinary Portland cement 70 parts, 30 parts, II level flyash, expanded pearlite batholith phase transformation light skeletal 40 parts, fiber 0.6 part, water reducer 0.35 part, Vltra tears and xanthan gum (weight ratio 1:2) 0.3 part, anhydrous sodium sulphate 0.3 part, polyvinyl alcohol 0.4, waterproofing agent of organosilicon 0.3 part, 3.5 parts, hydrogen peroxide, mixing water 32 parts.
Expanded pearlite batholith phase transformation light skeletal preparation method is with embodiment 1.
Preparation method is with embodiment 1.
The above-mentioned phase-change energy-storage temperature adjustment foamed concrete prepared has energy-saving and temperature-regulating effect, and its apparent density is 520kg/m
3, ultimate compression strength is 1.7MPa, and thermal conductivity is 0.12W/ (mK), and volume water absorption rate is 4%, and latent heat of phase change is 8200kJ/m
3.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term need not for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. a phase-change energy-storage temperature adjustment foamed concrete, is characterized in that, comprising: the cement of 70-100 weight part; The flyash of 0-30 weight part; The phase transformation light skeletal of 10-50 weight part; The fiber of 0-0.6 weight part; The water reducer of 0.2-0.4 weight part; The cell modifiers of 0.1-0.3 weight part; The hardening accelerator of 0.1-0.3 weight part; The toughener of 0-1.5 weight part; The water-resisting agent of 0-3 weight part; The chemical foaming agent of 2-9 weight part; And the water of 25-40 weight part.
2. phase-change energy-storage temperature adjustment foamed concrete according to claim 1, is characterized in that, described phase-change energy-storage temperature adjustment foamed concrete apparent density is 120-850kg/m
3, ultimate compression strength is 0.2-4MPa, and thermal conductivity is 0.045-0.22W/ (mK), and volume water absorption rate is 4-10%, and latent heat of phase change is 2500-9500kJ/m
3.
3. phase-change energy-storage temperature adjustment foamed concrete according to claim 1 and 2, is characterized in that, described cement is ordinary Portland cement; Described flyash is I level and/or II level flyash; Described fiber is polypropylene fibre; Described water reducer is polycarboxylate water-reducer; Described cell modifiers is the mixture of Vltra tears and xanthan gum; Described hardening accelerator is at least one in calcium chloride, Quilonum Retard and anhydrous sodium sulphate; Described toughener is at least one in polyvinyl alcohol, redispersable latex powder and vinyl acetate-ethylene copolymer emulsion; Described water-resisting agent is waterproofing agent of organosilicon and/or stearate; Described chemical foaming agent is hydrogen peroxide,
Optionally, the strength grade of described ordinary Portland cement is not less than 42.5; In described flyash, the content of calcium oxide is greater than 10%; The length of described polypropylene fibre is 6-12 millimeter; The water-reducing rate of described polycarboxylate water-reducer is not less than 30%.
4. phase-change energy-storage temperature adjustment foamed concrete according to claim 3, is characterized in that, in described cell modifiers, the weight ratio of Vltra tears and xanthan gum is 1:2.
5. the phase-change energy-storage temperature adjustment foamed concrete according to any one of claim 1-4, is characterized in that, described phase transformation light skeletal, comprising:
Porous matrix material;
Phase change material, described phase change material is carried in described porous matrix material, to form phase transformation light skeletal skeleton structure;
Coating material, the outside surface of the coated described phase transformation light skeletal skeleton structure of described coating material,
Wherein, the transformation temperature of described phase transformation light skeletal is 18-50 degree Celsius,
Optionally, the weight ratio of described phase change material and described porous matrix material is not less than 40:60, is preferably (40-60): (60-40),
Optionally, described porous matrix material is at least one in pearlstone, expanded vermiculite, zeolite and Superlight ceramsites,
Optionally, described phase change material is at least one in alkane, polyvalent alcohol, fatty acid, alcohols and ester class,
Optionally, described coating material is at least one during polymer emulsion, resin solution and polymer cement are starched only.
6. prepare a method for phase-change energy-storage temperature adjustment foamed concrete described in any one of claim 1-5, it is characterized in that, comprising:
By the cement of 70-100 weight part; The flyash of 0-30 weight part; The fiber of 0-0.6 weight part; The water reducer of 0.2-0.4 weight part; The cell modifiers of 0.1-0.3 weight part; The hardening accelerator of 0.1-0.3 weight part; The toughener of 0-1.5 weight part; The water-resisting agent of 0-3 weight part; And the water of 25-40 weight part carries out the first mix and blend, only to be starched;
In described clean slurry, add the phase transformation light skeletal of 10-50 weight part and the chemical foaming agent of 2-9 weight part and carry out the second mix and blend, to obtain clean pulp mixture; And
Described clean pulp mixture to be built in mould and to carry out one section of maintenance; And
The described clean pulp mixture through described one section of maintenance is carried out the demoulding and carries out two sections of maintenances, to obtain described phase-change energy-storage temperature adjustment foamed concrete.
7. method according to claim 6, is characterized in that, the time of described first mix and blend is 1-3 minute,
Optionally, the interval time adding phase transformation light skeletal and chemical foaming agent in described clean slurry is not less than 10 seconds,
Optionally, the time of described second mix and blend is 6-12 second.
8. the method according to claim 6 or 7, it is characterized in that, described one section of maintenance and described two sections of maintenances are all carry out under temperature is 18-22 degree Celsius and humidity is the condition being greater than 95%, and described one section of curing time is 24 hours, and described two sections of curing times are 7-28 days.
9. the method according to any one of claim 6-8, is characterized in that, described phase transformation light skeletal is obtained by following method:
Porous matrix material is carried out drying, to obtain dry porous matrix material;
Phase change material is heated, to obtain molten state phase change material;
The porous matrix material of described drying and described molten state phase change material are carried out mixing in vacuum reaction still and reduced pressure treatment, to obtain phase transformation light skeletal skeleton structure;
By described phase transformation light skeletal skeleton structure cooling; And
Coating material is utilized to be undertaken coated and dry by the described phase transformation light skeletal skeleton structure of cooling, to obtain phase transformation light skeletal,
Optionally, the weight ratio of the porous matrix material of described molten state phase change material and described drying is not less than 40:60, is preferably (40-60): (60-40).
10. method according to claim 9, is characterized in that, the temperature of described drying is 80 degrees Celsius, and the time is 24 hours,
Optionally, the pressure in described vacuum reaction still is 0.08-0.1MPa, temperature for being greater than 50 degrees Celsius,
Optionally, described coated be that single-material is coated or several coating material superposition layering is coated.
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| C06 | Publication | ||
| PB01 | Publication | ||
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| CB03 | Change of inventor or designer information |
Inventor after: Chi Bichuan Inventor after: Cao Ke Inventor after: Gu Bingying Inventor after: Li Yingquan Inventor after: Hu Shikai Inventor after: Wang Mingxuan Inventor after: Chen Zhichun Inventor after: Zhu Lide Inventor after: Duan Ce Inventor after: Wang Xiaofan Inventor after: Chen Jiayu Inventor before: Chi Bichuan Inventor before: Cao Ke Inventor before: Gu Bingying Inventor before: Li Yingquan Inventor before: Hu Shikai Inventor before: Wang Mingxuan Inventor before: Chen Zhichun Inventor before: Zhu Lide Inventor before: Duan Ce Inventor before: Wang Xiaofan Inventor before: Chen Jiayu |
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| COR | Change of bibliographic data | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |
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| RJ01 | Rejection of invention patent application after publication |