CN109020397A - A kind of phase-change energy-storage mortar and preparation method thereof - Google Patents

A kind of phase-change energy-storage mortar and preparation method thereof Download PDF

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Publication number
CN109020397A
CN109020397A CN201811053865.9A CN201811053865A CN109020397A CN 109020397 A CN109020397 A CN 109020397A CN 201811053865 A CN201811053865 A CN 201811053865A CN 109020397 A CN109020397 A CN 109020397A
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parts
phase
cement
flyash
mortar
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肖超
黄�俊
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Chengdu Acer Building Materials Ltd By Share Ltd
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Chengdu Acer Building Materials Ltd By Share Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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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)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention belongs to field of mortar, specifically disclose a kind of phase-change energy-storage mortar and preparation method thereof, the mortar is made of following material: 180-200 parts of cement, 20-30 parts of flyash, 20-30 parts of solid sulfur ash, 680-760 parts of sand, 40-60 parts of composite phase-change material, 110-130 parts of water, based on parts by weight;Preparation method are as follows: in mortar mixer, cement, flyash, solid sulfur ash and sand dry mixing 30s first is added after mixing, adds composite phase-change material, while stirring plus water, stirring 3min are obtained.A kind of phase-change energy-storage mortar provided by the invention, the problem which the conventional cements admixture shortage of resources such as has the function of good mechanical property and hidden heat energy storage, while overcoming flyash and fluidized bed combustion coal ash/slag utilization approaches are limited, utilization rate is low.

Description

A kind of phase-change energy-storage mortar and preparation method thereof
Technical field
The invention belongs to field of mortar, specifically disclose a kind of phase-change energy-storage mortar and preparation method thereof.
Background technique
Phase-change energy-storage mortar is both phase-change material and mortar is compound, the low, potential heat value using phase-change material thermal coefficient High advantage improves the thermal and insulating performance of mortar, and the inside and outside wall thermal insulation for building reduces refrigeration (or heating) A kind of mortar of energy consumption.
Currently, in the technology of preparing of phase-change energy-storage mortar, generally using Industrial Solid Wastes such as flyash as cement admixture, Make cementitious material after compounding by a certain percentage with ordinary portland cement, this with gelling material is all done using ordinary portland cement In comparison, the alternative part ordinary portland cement of the incorporation of flyash etc. reaches reduction water to reduce cement consumption to material The Industrial Solid Wastes such as flyash are mainly utilized in the purpose of the energy consumption of mud industrial production, the discharge of pollution exhaust gas etc., action principle Potential gelling.However, as economic construction of China high speed development, construction scale are constantly expanded, the conventional cements such as flyash Admixture has also faced the problems such as shortage of resources, quality of supplying degradation.Therefore, if the Industrial Solid Waste of other classes can be developed The traditional industries solid waste such as make cement admixture, and can substitute to a certain degree or substitute flyash completely and prepares phase-change energy-storage mortar, The shortages of resources problem such as slag micropowder can not only then be alleviated, can also enrich the resource utilization approach of other class Industrial Solid Wastes.
Circulating fluidized bed boiler combustion coal solid sulfur clinker refers to sulfur-bearing coal and sulphur-fixing agent with certain proportion (Ca/S=2.0-2.5) Generated discarded ash, below letter after (850~950 DEG C) of certain temperature are calcined solid sulphur in circulating fluidized bed boiler after mixing Claim " solid sulfur ash ".A large amount of alpha-quartz, active silica-alumina mineral, bloodstone, anhydrite are typically contained in solid sulfur ash and are dissociated on a small quantity Calcium oxide and lime stone, chemical component mainly include Al2O3、SiO2、Fe2O3、SO3, CaO, MgO and f-CaO.Currently, China About 100,000,000 tons of the solid sulfur ash discharged every year, it is limited, utilization rate is low because there are resource utilization approach the problems such as, mostly use stacking or The mode of landfill is handled, and not only land occupation resource but also be easy to cause environmental pollution.Studies have shown that solid sulfur ash also have it is potential Gelling, performance characteristic and flyash etc. have a very big similitude, thus solid sulfur ash also have make cement admixture must Want condition.The present invention is quasi- to prepare phase-change energy-storage mortar as cement admixture using solid sulfur ash substitution part flyash.
Summary of the invention
To overcome, the conventional cements admixture shortage of resources such as flyash and fluidized bed combustion coal ash/slag utilization approaches are limited, utilization rate is low The problem of, the present invention provides a kind of phase-change energy-storage mortars and preparation method thereof.
Technical scheme is as follows:
A kind of phase-change energy-storage mortar is made of following material: 180-200 parts of cement, 20-30 parts of flyash, solid sulfur ash 20- 30 parts, 680-760 parts of sand, 40-60 parts of composite phase-change material, 110-130 parts of water, based on parts by weight.
Preferably, a kind of phase-change energy-storage mortar, is made of following material: 185-195 parts of cement, 20-25 parts of flyash, 25-30 parts of solid sulfur ash, 700-750 parts of sand, 48-52 parts of composite phase-change material, 115-125 parts of water, based on parts by weight.
Further, a kind of phase-change energy-storage mortar is made of following material: 190 parts of cement, 25 parts of flyash, solid sulfur ash 25 Part, 720 parts of sand, 50 parts of composite phase-change material, 120 parts of water, based on parts by weight.
The cement is selected from 42.5 ordinary portland cements, is provided by Sichuan Esheng Cement Group Co., Ltd., nitrogen It is 343m that absorption method, which surveys specific surface area,2/ kg, 28 days compression strength are 47.2MPa.
The flyash is selected from II grade of flyash, is provided by Chengdu Da Er rich merchant's trade Co., Ltd, and nitrogen adsorption method surveys ratio Surface area is 361m2/ kg, 28 days activity index of mortar are 78.5%, Al in chemical component2O3+SiO2+Fe2O3Account for mass ratio 82.6%.
The solid sulfur ash is selected from the solid sulfur ash Jing Guo working process, and processing technology is grinding, and the specific method is as follows: being used Φ 500 × 500mm cement testing ball mill to original state solid sulfur ash (by Neijiang City in Sichuan Province Baima thermal power plant provide, chemistry at Al in point2O3+SiO2+Fe2O3Account for mass ratio 70.3%) carry out grinding, grinding time 60min.Solid sulfur ash particle nitrogen after grinding It is 735m that absorption method, which surveys specific surface area,2/ kg, 28 days activity index of mortar are 99.6%.
The sand is selected from 10-100 mesh continuous grading baked sand, fineness modulus 2.7, by the great mining industry Co., Ltd of Qingdao ten thousand It provides.
The composite phase-change material is selected from paraffin/expanded perlite phase-change material, and preparation method is as follows:
(1) be added expanded perlite in vacuum reaction kettle first, control bath temperature at 75-85 DEG C, with 60r/min into Row stirring;Start to vacuumize after stirring 20-30min, vacuum cavitations are in 0.55~0.62MPa;Then it is slowly added to atoleine, Wherein, the volume ratio of paraffin and expanded perlite is 3:4~1:1, continues to stir with 80r/min, after paraffin adds, vacuum cavitations In 0.9~1.0MPa, mixing speed is controlled in 120r/min;Extraction valve is closed after 35min, expanded perlite is sufficiently inhaled at this time Then attached paraffin carries out discharging;
(2) it is completely soaked in the water glass solution of 3.1mol/L after expanded perlite being taken out room temperature natural cooling, 12h After take out, then be completely soaked the CaCl in 2mol/L2It is reacted in solution for 24 hours, eventually in the expanded perlite for being adsorbed with paraffin Surface forms a preliminary encapsulated layer, that is, hydrated calcium silicate layer, supports cement standard is put by the expanded perlite tentatively encapsulated After conserving 28d in protecting box, the hydrated calcium silicate layer development on expanded perlite surface is complete, obtains paraffin/expanded pearlite at this time Rock phase-change material.
Expanded perlite is a kind of natural acidic nature of glass slag nonmetallic minerals, including perlite, pitchstone and Obsidian, three are crystal water content difference.Due to its rapid spatial expansion 4~30 under 1000~1300 DEG C of hot conditions Times, therefore it is referred to as expanded perlite.
A kind of phase-change energy-storage mortar, preparation method are as follows: in mortar mixer, cement, flyash, solid sulphur is first added Ash and sand dry mixing 30-60s after mixing, add composite phase-change material, and while stirring plus water, stirring 3-5min make ?.
42.5 ordinary portland cements, flyash, grinding solid sulfur ash constitute the gelling of dry-mixed ground mortar in the present invention Material, alkali, that is, Ca (OH) that hydrated cementitious generates2It is the exciting agent of flyash and solid sulfur ash pozzolanic activity.
Mixed again compared with making mortar gel material using only ordinary portland cement, in cement a certain amount of flyash and Solid sulfur ash can change the performance of mortar gel material, but because the physical and chemical performance of flyash and solid sulfur ash has differences, so the two It is also not quite similar to the Influencing Mechanism of mortar gel material performance.
In flyash contain a large amount of active silica-alumina mineral, but research shows that the oxygen-octahedron of its siulica-alumina mineral polymerization Degree is higher, so the condition that its pozzolanic activity is excited is relatively harsh, therefore, when flyash is mixed again by a certain percentage with cement When, alkali, that is, Ca (OH) of hydrated cementitious generation2It is difficult just sufficiently to excite its pozzolanic activity in the early stage, pozzolanic activity is general It could sufficiently be excited in the later period of hydrated cementitious, so that the later strength for mainly enhancing cementitious material is shown as, and to raising Its early strength has little significance, or even reduces its early strength.
Also contain a large amount of active silica-alumina mineral in solid sulfur ash, show significant pozzolanic activity, but with flyash Difference, about 850~950 DEG C of the formation temperature of solid sulfur ash, far below 1300~1600 DEG C of formation temperature of flyash, in solid sulfur ash The pozzolanic activity of siulica-alumina mineral is generally below flyash, but research shows that the oxygen-octahedron of siulica-alumina mineral in solid sulfur ash The degree of polymerization is also below flyash, therefore the pozzolanic activity of solid sulfur ash is easier to be excited, when flyash and cement are pressed centainly When ratio is mixed again, morning, the intermediary and later stages intensity of cementitious material can be improved simultaneously.
Flyash usually only pozzolanic activity, and solid sulfur ash not only has pozzolanic activity, also has the hydraulicity and water Change dilatancy, this also contains oxidation in addition to active silica-alumina mineral derived from the particularity of its internal active mineral composition in solid sulfur ash Calcium, anhydrite;In addition, being different from fly ash grain has the characteristics that smooth surface, it is loose that inside and outside is presented in solid sulfur ash particle Porous shape characteristic.It is handled by grinding, the loose porous shape characteristic of solid sulfur ash particle can be changed, keep its grain diameter bright Aobvious reduction, particle porosity are substantially reduced, this advantageously reduces its water requirement, reduces its particle surface micropore to organic macromolecule Absorption, improve its overall activity, promote wherein benefits such as slightly solubility anhydrite acceleration of hydration.Make water compared to using flyash Mechanism of action when mud admixture, solid sulfur ash make cement admixture is also more complicated;Flyash mainly passes through therein active three Al 2 O, active silica and hydrolysis product of cement calcium hydroxide reaction form C-S-H (hydrated calcium silicate) and C-A-H (drated calcium aluminate) is to influence mortar gel material performance;In addition to this solid sulfur ash, can also pass through contained calcium oxide aquation shape At calcium hydroxide, anhydrite hydration formed dihydrate gypsum come promote C-S-H (hydrated calcium silicate), C-A-H (drated calcium aluminate), It is more closely knit firm that the formation of AFt/AFm (entringite or delayed ettringite) makes hydrated product, to influence mortar gel material Performance, and low contained in solid sulfur ash/non-active particles may act as subtle filler, play microparticle filing effect effectively to subtract The defect of few mortar microstructure.
Continuous grading baked sand plays support and the effect of skeleton to mortar as mortar aggregate in the present invention.
Composite phase-change material is the key component for realizing mortar energy-storage function in the present invention, it is mainly by phase-change material and phase Become material support to constitute, phase-change material is packaged in phase-change material carrier inside;Since phase-change material is generally organic matter, with water The inorganic gel system of the compositions such as mud, flyash, solid sulfur ash be difficult it is compatible, directly by phase-change material mix inorganic gel system In, the hydration and hardening performance of inorganic gel system not only can be seriously destroyed, but also the phase-change accumulation energy performance of phase-change material is also difficult Effectively play.Therefore, the present invention is using vacuum suction method (vacuum cavitations are in 0.55-1.0MPa) in heating water bath environment (75-85 DEG C) under so that phase-change material carrier expanded perlite is sufficiently adsorbed phase-change material paraffin, be then soaked in the water of 3.1mol/L step by step The CaCl of glass solution and 2mol/L2Surface encapsulation is realized in solution, and composite phase-change material is prepared, the composite phase-change material Good phase-change accumulation energy performance can not only be played, and will not influence the normal hydration and hardening process of mortar gel system.It is compound Phase-change material realizes neither endothermic nor exothermic process by phase transformation, makes building thermal capacitance with higher, to reduce outside environment Direct impact of the temperature change to interior of building environment reduces interior of building environmental temperature fluctuation, internal comfort level etc. More preferably.
The beneficial effects of the present invention are:
The present invention provides a kind of phase-change energy-storage mortar, is made of following material: 180-200 parts of cement, flyash 20-30 Part, 20-30 parts of solid sulfur ash, 680-760 parts of sand, 40-60 parts of composite phase-change material, 110-130 parts of water, based on parts by weight.Its The preparation method is as follows: cement, flyash, solid sulfur ash and sand dry mixing 30s first is added after mixing in mortar mixer, Composite phase-change material is added, while stirring plus water, stirring 3min are obtained.The present invention utilizes the solid sulfur ash substitution portion after grinding Point flyash makees cement admixture, is prepared for a kind of phase-change energy-storage mortar, and the mortar properties are excellent, and merely with flyash The phase-change energy-storage mortar for making the preparation of cement admixture is compared, and phase-change energy-storage mortar prepared by the present invention has higher compression strength With heat storage coefficient and lower thermal coefficient, this shows that phase-change energy-storage mortar prepared by the present invention has better mechanical property With hidden heat energy storage function, while the conventional cements admixture shortage of resources such as overcome flyash and fluidized bed combustion coal ash/slag utilization approaches have The low problem of limit, utilization rate.
Specific embodiment:
Embodiment 1:
The present invention provides a kind of phase-change energy-storage mortar, is made of following material: 190 parts of cement, 25 parts of flyash, solid sulfur ash 25 parts, 720 parts of sand, 50 parts of phase-change material, 120 parts of water, based on parts by weight.
The cement is selected from 42.5 ordinary portland cements, is provided by Sichuan Esheng Cement Group Co., Ltd., nitrogen It is 343m that absorption method, which surveys specific surface area,2/ kg, 28 days compression strength are 47.2MPa.
The flyash is selected from II grade of flyash, is provided by Chengdu Da Er rich merchant's trade Co., Ltd, and nitrogen adsorption method surveys ratio Surface area is 361m2/ kg, 28 days activity index of mortar are 78.5%, Al in chemical component2O3+SiO2+Fe2O3Account for mass ratio 82.6%.
The solid sulfur ash is selected from the solid sulfur ash Jing Guo working process, and processing technology is grinding, and the specific method is as follows: being used Φ 500 × 500mm cement testing ball mill to original state solid sulfur ash (by Neijiang City in Sichuan Province Baima thermal power plant provide, chemistry at Al in point2O3+SiO2+Fe2O3Account for mass ratio 70.3%) carry out grinding, grinding time 60min.Solid sulfur ash particle nitrogen after grinding It is 735m that absorption method, which surveys specific surface area,2/ kg, 28 days activity index of mortar are 99.6%.
The sand is selected from 10-100 mesh continuous grading baked sand, fineness modulus 2.7, by the great mining industry Co., Ltd of Qingdao ten thousand It provides.
The composite phase-change material is selected from paraffin/expanded perlite phase-change material, and preparation method is as follows:
(1) be added expanded perlite in vacuum reaction kettle first, control bath temperature at 75-85 DEG C, with 60r/min into Row stirring;Start to vacuumize after stirring 20-30min, vacuum cavitations are in 0.55~0.62MPa;Then it is slowly added to atoleine, Wherein, the volume ratio of paraffin and expanded perlite is 3:4~1:1, continues to stir with 80r/min, after paraffin adds, vacuum cavitations In 0.9~1.0MPa, mixing speed is controlled in 120r/min;Extraction valve is closed after 35min, expanded perlite is sufficiently inhaled at this time Then attached paraffin carries out discharging;
(2) it is completely soaked in the water glass solution of 3.1mol/L after expanded perlite being taken out room temperature natural cooling, 12h After take out, then be completely soaked the CaCl in 2mol/L2It is reacted in solution for 24 hours, eventually in the expanded perlite for being adsorbed with paraffin Surface forms a preliminary encapsulated layer, that is, hydrated calcium silicate layer, supports cement standard is put by the expanded perlite tentatively encapsulated After conserving 28d in protecting box, the hydrated calcium silicate layer development on expanded perlite surface is complete, obtains paraffin/expanded pearlite at this time Rock phase-change material.
A kind of phase-change energy-storage mortar, preparation method are as follows: in mortar mixer, cement, flyash, solid sulphur is first added Ash and sand dry mixing 30s after mixing, add composite phase-change material, and while stirring plus water, stirring 3min are obtained.
Embodiment 2:
A kind of phase-change energy-storage mortar is made of following material: 190 parts of cement, 20 parts of flyash, 30 parts of solid sulfur ash, sand 720 Part, 50 parts of phase-change material, 120 parts of water, based on parts by weight.
The cement is selected from 42.5 ordinary portland cements, is provided by Sichuan Esheng Cement Group Co., Ltd., nitrogen It is 343m that absorption method, which surveys specific surface area,2/ kg, 28 days compression strength are 47.2MPa.
The flyash is selected from II grade of flyash, is provided by Chengdu Da Er rich merchant's trade Co., Ltd, and nitrogen adsorption method surveys ratio Surface area is 361m2/ kg, 28 days activity index of mortar are 78.5%, Al in chemical component2O3+SiO2+Fe2O3Account for mass ratio 82.6%.
The solid sulfur ash is selected from the solid sulfur ash Jing Guo working process, and processing technology is grinding, and the specific method is as follows: being used Φ 500 × 500mm cement testing ball mill to original state solid sulfur ash (by Neijiang City in Sichuan Province Baima thermal power plant provide, chemistry at Al in point2O3+SiO2+Fe2O3Account for mass ratio 70.3%) carry out grinding, grinding time 60min.Solid sulfur ash particle nitrogen after grinding It is 735m that absorption method, which surveys specific surface area,2/ kg, 28 days activity index of mortar are 99.6%.
The sand is selected from 10-100 mesh continuous grading baked sand, fineness modulus 2.7, by the great mining industry Co., Ltd of Qingdao ten thousand It provides.
The composite phase-change material is selected from paraffin/expanded perlite phase-change material, and preparation method is as follows:
(1) be added expanded perlite in vacuum reaction kettle first, control bath temperature at 75-85 DEG C, with 60r/min into Row stirring;Start to vacuumize after stirring 20-30min, vacuum cavitations are in 0.55~0.62MPa;Then it is slowly added to atoleine, Wherein, the volume ratio of paraffin and expanded perlite is 3:4~1:1, continues to stir with 80r/min, after paraffin adds, vacuum cavitations In 0.9~1.0MPa, mixing speed is controlled in 120r/min;Extraction valve is closed after 35min, expanded perlite is sufficiently inhaled at this time Then attached paraffin carries out discharging;
(2) it is completely soaked in the water glass solution of 3.1mol/L after expanded perlite being taken out room temperature natural cooling, 12h After take out, then be completely soaked the CaCl in 2mol/L2It is reacted in solution for 24 hours, eventually in the expanded perlite for being adsorbed with paraffin Surface forms a preliminary encapsulated layer, that is, hydrated calcium silicate layer, supports cement standard is put by the expanded perlite tentatively encapsulated After conserving 28d in protecting box, the hydrated calcium silicate layer development on expanded perlite surface is complete, obtains paraffin/expanded pearlite at this time Rock phase-change material.
A kind of phase-change energy-storage mortar, preparation method are as follows: in mortar mixer, cement, flyash, solid sulphur is first added Ash and sand dry mixing 30s after mixing, add composite phase-change material, and while stirring plus water, stirring 3min are obtained.
Embodiment 3:
A kind of phase-change energy-storage mortar is made of following material: 195 parts of cement, 20 parts of flyash, 25 parts of solid sulfur ash, sand 720 Part, 50 parts of phase-change material, 120 parts of water, based on parts by weight.
The cement is selected from 42.5 ordinary portland cements, is provided by Sichuan Esheng Cement Group Co., Ltd., nitrogen It is 343m that absorption method, which surveys specific surface area,2/ kg, 28 days compression strength are 47.2MPa.
The flyash is selected from II grade of flyash, is provided by Chengdu Da Er rich merchant's trade Co., Ltd, and nitrogen adsorption method surveys ratio Surface area is 361m2/ kg, 28 days activity index of mortar are 78.5%, Al in chemical component2O3+SiO2+Fe2O3Account for mass ratio 82.6%.
The solid sulfur ash is selected from the solid sulfur ash Jing Guo working process, and processing technology is grinding, and the specific method is as follows: being used Φ 500 × 500mm cement testing ball mill to original state solid sulfur ash (by Neijiang City in Sichuan Province Baima thermal power plant provide, chemistry at Al in point2O3+SiO2+Fe2O3Account for mass ratio 70.3%) carry out grinding, grinding time 60min.Solid sulfur ash particle nitrogen after grinding It is 735m that absorption method, which surveys specific surface area,2/ kg, 28 days activity index of mortar are 99.6%.
The sand is selected from 10-100 mesh continuous grading baked sand, fineness modulus 2.7, by the great mining industry Co., Ltd of Qingdao ten thousand It provides.
The composite phase-change material is selected from paraffin/expanded perlite phase-change material, and preparation method is as follows:
(1) be added expanded perlite in vacuum reaction kettle first, control bath temperature at 75-85 DEG C, with 60r/min into Row stirring;Start to vacuumize after stirring 20-30min, vacuum cavitations are in 0.55~0.62MPa;Then it is slowly added to atoleine, Wherein, the volume ratio of paraffin and expanded perlite is 3:4~1:1, continues to stir with 80r/min, after paraffin adds, vacuum cavitations In 0.9~1.0MPa, mixing speed is controlled in 120r/min;Extraction valve is closed after 35min, expanded perlite is sufficiently inhaled at this time Then attached paraffin carries out discharging;
(2) it is completely soaked in the water glass solution of 3.1mol/L after expanded perlite being taken out room temperature natural cooling, 12h After take out, then be completely soaked the CaCl in 2mol/L2It is reacted in solution for 24 hours, eventually in the expanded perlite for being adsorbed with paraffin Surface forms a preliminary encapsulated layer, that is, hydrated calcium silicate layer, supports cement standard is put by the expanded perlite tentatively encapsulated After conserving 28d in protecting box, the hydrated calcium silicate layer development on expanded perlite surface is complete, obtains paraffin/expanded pearlite at this time Rock phase-change material.
A kind of phase-change energy-storage mortar, preparation method are as follows: in mortar mixer, cement, flyash, solid sulphur is first added Ash and sand dry mixing 30s after mixing, add composite phase-change material, and while stirring plus water, stirring 3min are obtained.
Embodiment 4:
A kind of phase-change energy-storage mortar is made of following material: 185 parts of cement, 25 parts of flyash, 30 parts of solid sulfur ash, sand 720 Part, 50 parts of phase-change material, 120 parts of water, based on parts by weight.
The cement is selected from 42.5 ordinary portland cements, is provided by Sichuan Esheng Cement Group Co., Ltd., nitrogen It is 343m that absorption method, which surveys specific surface area,2/ kg, 28 days compression strength are 47.2MPa.
The flyash is selected from II grade of flyash, is provided by Chengdu Da Er rich merchant's trade Co., Ltd, and nitrogen adsorption method surveys ratio Surface area is 361m2/ kg, 28 days activity index of mortar are 78.5%, Al in chemical component2O3+SiO2+Fe2O3Account for mass ratio 82.6%.
The solid sulfur ash is selected from the solid sulfur ash Jing Guo working process, and processing technology is grinding, and the specific method is as follows: being used Φ 500 × 500mm cement testing ball mill to original state solid sulfur ash (by Neijiang City in Sichuan Province Baima thermal power plant provide, chemistry at Al in point2O3+SiO2+Fe2O3Account for mass ratio 70.3%) carry out grinding, grinding time 60min.Solid sulfur ash particle nitrogen after grinding It is 735m that absorption method, which surveys specific surface area,2/ kg, 28 days activity index of mortar are 99.6%.
The sand is selected from 10-100 mesh continuous grading baked sand, fineness modulus 2.7, by the great mining industry Co., Ltd of Qingdao ten thousand It provides.
The composite phase-change material is selected from paraffin/expanded perlite phase-change material, and preparation method is as follows:
(1) be added expanded perlite in vacuum reaction kettle first, control bath temperature at 75-85 DEG C, with 60r/min into Row stirring;Start to vacuumize after stirring 20-30min, vacuum cavitations are in 0.55~0.62MPa;Then it is slowly added to atoleine, Wherein, the volume ratio of paraffin and expanded perlite is 3:4~1:1, continues to stir with 80r/min, after paraffin adds, vacuum cavitations In 0.9~1.0MPa, mixing speed is controlled in 120r/min;Extraction valve is closed after 35min, expanded perlite is sufficiently inhaled at this time Then attached paraffin carries out discharging;
(2) it is completely soaked in the water glass solution of 3.1mol/L after expanded perlite being taken out room temperature natural cooling, 12h After take out, then be completely soaked the CaCl in 2mol/L2It is reacted in solution for 24 hours, eventually in the expanded perlite for being adsorbed with paraffin Surface forms a preliminary encapsulated layer, that is, hydrated calcium silicate layer, supports cement standard is put by the expanded perlite tentatively encapsulated After conserving 28d in protecting box, the hydrated calcium silicate layer development on expanded perlite surface is complete, obtains paraffin/expanded pearlite at this time Rock phase-change material.
A kind of phase-change energy-storage mortar, preparation method are as follows: in mortar mixer, cement, flyash, solid sulphur is first added Ash and sand dry mixing 30s after mixing, add composite phase-change material, and while stirring plus water, stirring 3min are obtained.
Embodiment 5:
A kind of phase-change energy-storage mortar is made of following material: 190 parts of cement, 25 parts of flyash, 25 parts of solid sulfur ash, sand 720 Part, 52 parts of phase-change material, 120 parts of water, based on parts by weight.
The cement is selected from 42.5 ordinary portland cements, is provided by Sichuan Esheng Cement Group Co., Ltd., nitrogen It is 343m that absorption method, which surveys specific surface area,2/ kg, 28 days compression strength are 47.2MPa.
The flyash is selected from II grade of flyash, is provided by Chengdu Da Er rich merchant's trade Co., Ltd, and nitrogen adsorption method surveys ratio Surface area is 361m2/ kg, 28 days activity index of mortar are 78.5%, Al in chemical component2O3+SiO2+Fe2O3Account for mass ratio 82.6%.
The solid sulfur ash is selected from the solid sulfur ash Jing Guo working process, and processing technology is grinding, and the specific method is as follows: being used Φ 500 × 500mm cement testing ball mill to original state solid sulfur ash (by Neijiang City in Sichuan Province Baima thermal power plant provide, chemistry at Al in point2O3+SiO2+Fe2O3Account for mass ratio 70.3%) carry out grinding, grinding time 60min.Solid sulfur ash particle nitrogen after grinding It is 735m that absorption method, which surveys specific surface area,2/ kg, 28 days activity index of mortar are 99.6%.
The sand is selected from 10-100 mesh continuous grading baked sand, fineness modulus 2.7, by the great mining industry Co., Ltd of Qingdao ten thousand It provides.
The composite phase-change material is selected from paraffin/expanded perlite phase-change material, and preparation method is as follows:
(1) be added expanded perlite in vacuum reaction kettle first, control bath temperature at 75-85 DEG C, with 60r/min into Row stirring;Start to vacuumize after stirring 20-30min, vacuum cavitations are in 0.55~0.62MPa;Then it is slowly added to atoleine, Wherein, the volume ratio of paraffin and expanded perlite is 3:4~1:1, continues to stir with 80r/min, after paraffin adds, vacuum cavitations In 0.9~1.0MPa, mixing speed is controlled in 120r/min;Extraction valve is closed after 35min, expanded perlite is sufficiently inhaled at this time Then attached paraffin carries out discharging;
(2) it is completely soaked in the water glass solution of 3.1mol/L after expanded perlite being taken out room temperature natural cooling, 12h After take out, then be completely soaked the CaCl in 2mol/L2It is reacted in solution for 24 hours, eventually in the expanded perlite for being adsorbed with paraffin Surface forms a preliminary encapsulated layer, that is, hydrated calcium silicate layer, supports cement standard is put by the expanded perlite tentatively encapsulated After conserving 28d in protecting box, the hydrated calcium silicate layer development on expanded perlite surface is complete, obtains paraffin/expanded pearlite at this time Rock phase-change material.
A kind of phase-change energy-storage mortar, preparation method are as follows: in mortar mixer, cement, flyash, solid sulphur is first added Ash and sand dry mixing 30s after mixing, add composite phase-change material, and while stirring plus water, stirring 3min are obtained.
By the phase-change energy-storage mortar containing solid sulfur ash of Examples 1 to 5 preparation and the phase-change energy-storage mortar without solid sulfur ash into Row performance compares, as a result as follows:
Remarks: the phase-change energy-storage mortar without solid sulfur ash is made of following material: 190 parts of cement, 50 parts of flyash, sand 680 parts, 110 parts of phase-change material, 135 parts of water, based on parts by weight;Its composition material performance and preparation method and Examples 1 to 5 In it is consistent.
By data in upper table it is found that under the conditions of identical water consumption, comparison is free of the phase-change energy-storage mortar of solid sulfur ash, embodiment The phase-change energy-storage mortar of 1~5 preparation has higher compression strength and heat storage coefficient and lower thermal coefficient, this shows this Invention has better mechanical property using the phase-change energy-storage mortar that solid sulfur ash substitution part flyash makees cement admixture preparation With hidden heat energy storage function.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.Modification done within the spirit and principles of the present invention should all contain Within protection scope of the present invention.

Claims (9)

1. a kind of phase-change energy-storage mortar, it is characterised in that: be made of following material: 180-200 parts of cement, 20-30 parts of flyash, 20-30 parts of solid sulfur ash, 680-760 parts of sand, 40-60 parts of composite phase-change material, 110-130 parts of water, based on parts by weight.
2. a kind of phase-change energy-storage mortar according to claim 1, it is characterised in that: be made of following material: cement 185- 195 parts, 20-25 parts of flyash, 25-30 parts of solid sulfur ash, 700-750 parts of sand, 48-52 parts of composite phase-change material, water 115-125 Part, based on parts by weight.
3. a kind of phase-change energy-storage mortar according to claim 2, it is characterised in that: be made of following material: cement 190 Part, 25 parts of flyash, 25 parts of solid sulfur ash, 720 parts of sand, 50 parts of composite phase-change material, 120 parts of water, based on parts by weight.
4. a kind of phase-change energy-storage mortar according to claim 3, it is characterised in that: the cement is selected from 42.5 common silicic acid Salt cement, it is 343m that nitrogen adsorption method, which surveys specific surface area,2/ kg, 28 days compression strength are 47.2MPa.
5. a kind of phase-change energy-storage mortar according to claim 1, it is characterised in that: the flyash is selected from II grade of fine coal Ash, it is 361m that nitrogen adsorption method, which surveys specific surface area,2/ kg, 28 days activity index of mortar are 78.5%, Al in chemical component2O3+ SiO2+Fe2O3Account for mass ratio 82.6%.
6. a kind of phase-change energy-storage mortar according to claim 1, it is characterised in that: the solid sulfur ash is selected to be added by grinding The solid sulfur ash of work processing, it is 735m that solid sulfur ash particle nitrogen adsorption method, which surveys specific surface area, after grinding2/ kg, 28 days activity index of mortar It is 99.6%.
7. a kind of phase-change energy-storage mortar according to claim 1, it is characterised in that: the sand is selected from the continuous grade of 10-100 mesh With baked sand, fineness modulus 2.7.
8. a kind of phase-change energy-storage mortar according to claim 1, it is characterised in that: the composite phase-change material is selected from stone Wax/expanded perlite phase-change material, preparation method are as follows:
(1) expanded perlite is added in vacuum reaction kettle first, controls bath temperature at 75-85 DEG C, is stirred with 60r/min It mixes;Start to vacuumize after stirring 20-30min, vacuum cavitations are in 0.55~0.62MPa;Then it is slowly added to atoleine, In, the volume ratio of paraffin and expanded perlite is 3:4~1:1, continues to stir with 80r/min, after paraffin adds, vacuum cavitations exist 0.9~1.0MPa, mixing speed are controlled in 120r/min;Extraction valve is closed after 35min, expanded perlite sufficiently adsorbs at this time Then paraffin carries out discharging;
(2) it is completely soaked in the water glass solution of 3.1mol/L after expanded perlite being taken out room temperature natural cooling, is taken after 12h Out, then it is completely soaked the CaCl in 2mol/L2It is reacted in solution for 24 hours, eventually on the expanded perlite surface for being adsorbed with paraffin A preliminary encapsulated layer, that is, hydrated calcium silicate layer is formed, cement standard curing box will be put by the expanded perlite tentatively encapsulated After middle maintenance 28d, the hydrated calcium silicate layer development on expanded perlite surface is complete, obtains paraffin/expanded pearlite lithofacies at this time Become material.
9. a kind of preparation method of phase-change energy-storage mortar according to claim 1, it is characterised in that: the following steps are included: In mortar mixer, cement, flyash, solid sulfur ash and sand dry mixing 30-60s first is added after mixing, adds compound Phase-change material, while stirring plus water, stirring 3-5min are obtained.
CN201811053865.9A 2018-09-10 2018-09-10 A kind of phase-change energy-storage mortar and preparation method thereof Pending CN109020397A (en)

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Application publication date: 20181218