CN108218376B - Desulfurized gypsum temperature-regulating building block and preparation method thereof - Google Patents

Desulfurized gypsum temperature-regulating building block and preparation method thereof Download PDF

Info

Publication number
CN108218376B
CN108218376B CN201810204423.3A CN201810204423A CN108218376B CN 108218376 B CN108218376 B CN 108218376B CN 201810204423 A CN201810204423 A CN 201810204423A CN 108218376 B CN108218376 B CN 108218376B
Authority
CN
China
Prior art keywords
gypsum
inner core
desulfurized
building block
balls
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810204423.3A
Other languages
Chinese (zh)
Other versions
CN108218376A (en
Inventor
陈伟
陈柯宇
沈心媛
徐亦冬
耿健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Institute of Technology of ZJU
Original Assignee
Ningbo Institute of Technology of ZJU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Institute of Technology of ZJU filed Critical Ningbo Institute of Technology of ZJU
Priority to CN201810204423.3A priority Critical patent/CN108218376B/en
Publication of CN108218376A publication Critical patent/CN108218376A/en
Application granted granted Critical
Publication of CN108218376B publication Critical patent/CN108218376B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
    • C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a desulfurized gypsum thermoregulation building block which is formed by mixing and pouring a plurality of gypsum balls and gypsum slurry, wherein the components of the gypsum balls and the gypsum slurry comprise desulfurized gypsum, the gypsum balls comprise an inner core and an outer film wrapping the inner core, and the inner core of the gypsum balls comprises the following components in percentage by weight: 30-60% of the fish tank filter material, 10-45% of the phase change material and 20-40% of the desulfurized gypsum. The desulfurized gypsum temperature-regulating building block can automatically absorb and emit heat, and achieves the effects of high absorption and low emission and automatic regulation of the temperature in a building. The invention also discloses a preparation method of the desulfurized gypsum temperature-regulating building block.

Description

Desulfurized gypsum temperature-regulating building block and preparation method thereof
Technical Field
The invention relates to the field of wall building blocks, in particular to a desulfurized gypsum temperature-regulating building block and a preparation method thereof.
Background
The desulfurized gypsum is an industrial byproduct gypsum obtained by desulfurizing and purifying flue gas generated after combustion of sulfur-containing fuel, and the main component of the desulfurized gypsum is CaSO4·2H2And O. At present, the application range of the desulfurization gypsum is limited in China, the utilization amount is small, if the industrial gypsum can not be well comprehensively utilized, a large amount of land is occupied, soil and water sources can be polluted, serious secondary pollution is brought, and the benign development of enterprises and the society is influenced. Therefore, the method is one of the development directions of the desulfurized gypsum in the future, by exploring and increasing the application of the desulfurized gypsum in the building field and meeting the requirements of the building material market.
The building blocks are artificial blocks made of concrete and industrial waste, and are mainly used for walls, wherein the industrial waste can be desulfurized gypsum. Because the requirement of the wall body on the heat insulation performance is higher, holes are formed in the building blocks at present, and then the purpose of heat insulation is achieved by utilizing the air of the holes, or heat insulation polystyrene materials are added into the holes. However, since the temperature inside the building changes greatly, the indoor temperature cannot be adjusted ecologically and economically by only improving the heat insulation and heat preservation performance of the wall.
CN101994364A discloses a preparation method of a phase change energy storage desulfurized gypsum block, which comprises the steps of firstly calcining desulfurized gypsum in a calcining kiln to prepare desulfurized gypsum powder, mixing the desulfurized gypsum powder and fly ash for molding, and then filling phase change energy storage vermiculite into a hollow core to obtain the phase change energy storage desulfurized gypsum block; the phase change energy storage vermiculite takes light porous vermiculite as a matrix, organic phase change energy storage substances are adsorbed in the phase change energy storage vermiculite, and a styrene-butadiene latex-based composite material film layer is wrapped outside the phase change energy storage vermiculite. In order to obtain the high-strength desulfurized gypsum block, the desulfurized gypsum is required to be calcined into desulfurized gypsum powder at high temperature by the process, a large amount of energy is consumed by the high-temperature calcination process, and simultaneously, waste residues and waste gases are generated, so that the environment is polluted, and the production efficiency is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a desulfurized gypsum temperature-regulating building block which can ecologically and economically regulate the indoor temperature.
The technical solution of the invention is as follows: the desulfurization gypsum temperature-regulating building block is formed by mixing and pouring a plurality of gypsum balls and gypsum slurry, wherein the components of the gypsum balls and the gypsum slurry contain desulfurization gypsum, the gypsum balls comprise an inner core and an outer film wrapping the inner core, and the inner core of each gypsum ball comprises the following components in percentage by weight: 30-60% of the fish tank filter material, 10-45% of the phase change material and 20-40% of the desulfurized gypsum.
The desulfurized gypsum temperature-regulating building block has the temperature-regulating effect, because the adopted phase-change material plays an important role in the building block, the specific temperature-regulating principle is as follows: when the external high temperature exceeds the melting point of the phase change material, the phase change material is melted from a solid state to a liquid state, the phase change material absorbs external heat energy to store the heat and transfer the heat to the gypsum balls, then the heat is stored in the whole building block, the external heat energy is prevented from being transferred to the indoor, namely the high-temperature external cannot influence the indoor; when the outside is cold, the freezing point of the phase-change material is reached, at the moment, the phase-change material is solidified from a liquid state to a solid state, and the phase-change material releases heat to the room. When the room temperature changes, the room temperature rises, the building blocks absorb heat to store the heat, and the room temperature is reduced; the room temperature is reduced, the building blocks release the heat energy absorbed by the outside, and the room temperature is raised. When the physical state of the phase-change material changes, the temperature of the phase-change material is almost kept unchanged before the phase change is completed, a wide temperature platform is formed, although the temperature is unchanged, the absorbed or released latent heat is quite large, the thermal inertia of a building can be increased, the change range of the indoor temperature is reduced, the building is warm in winter and cool in summer, the use of heat-taking electrical appliances such as an air conditioner, an electric heater and the like is reduced, and the purposes of saving energy and reducing consumption are achieved.
Compared with the prior art, the desulfurized gypsum temperature-regulating building block has the following remarkable advantages and beneficial effects:
the fish tank filter material can be used as a carrier or a substrate to allow the phase-change material to enter the gypsum balls; the adventitia of parcel kernel can prevent that phase change material from leaking outward, and transmits the heat between inherent gypsum ball and the gypsum thick liquids part, utilizes phase change material's characteristic and adventitia to thermal transmissibility, at the efficient storage heat of gypsum ball kernel, then transmits each part of building block, and even distribution heat realizes the effect that adjusts the temperature of high drop. The adopted raw materials are porous, good in adsorptivity, high in strength and low in cost, and the building blocks with high strength can be obtained without high-temperature sintering, so that a large amount of energy is saved, the production cost is reduced, and the environment-friendly effect is achieved. The main components of the prepared gypsum balls and gypsum slurry are desulfurized gypsum which is used as the aggregate of the wall building blocks, so that the recycled industrial waste desulfurized gypsum is effectively utilized, the comprehensive reutilization of waste resources is realized, the problems of storage, environmental pollution and the like are effectively solved, the wall raw materials such as clay, cement and the like are saved, and the economic benefit is greatly improved.
Preferably, the weight ratio of the gypsum balls to the gypsum slurry is 1: 0.5-2. If the proportion of the gypsum balls is too large, the phenomenon that adjacent gypsum balls are too close to each other and are easy to adhere and form piles is caused, so that pores in the gypsum balls are uneven, the phase-change material cannot uniformly store and/or transfer heat energy, the utilization efficiency of the adhered gypsum balls is low, and the strength of the building block is reduced if the gypsum slurry is too little; on the contrary, if the proportion of the gypsum balls is too small, the gypsum balls are distributed too sparsely in the building block, and the contained phase-change material is insufficient, so that the problem of poor temperature regulation effect is caused. When the gypsum balls and the gypsum slurry in the weight ratio of 1: 0.5-2 are mixed and poured, the gypsum balls are uniformly distributed in the building block, so that the strength of the building block can be enhanced, and the temperature adjusting effect can be improved. Therefore, the building block formed by mixing and pouring the gypsum balls and the gypsum slurry according to the proportion has high strength and obvious temperature regulation effect.
Preferably, the fish tank filter material is one of volcanic rock, sintered ceramic stone and quartz balls, and the diameter of the fish tank filter material is 0.1-2 mm. The phase change material in the existing temperature regulating building block mostly takes light porous vermiculite as a substrate (also called a carrier), the vermiculite of raw ore is brown and flaky, the volume of the raw ore rapidly expands to 6-15 times after being roasted at 800-1000 ℃, and the expansion process generates bending deformation, namely the volume and shape change greatly before and after sintering, so that the structure of the building block is changed, the surface of the building block is uneven, and the vermiculite is easily deformed due to heat transfer during temperature regulation. The base body of the phase-change material is a fish tank filter material purchased from the market, and the fish tank filter materials have a porous structure and the diameter of the fish tank filter materials is 0.1-2 mm; if the purchased fish tank filter material has a diameter of more than 2mm, the fish tank filter material is crushed to enable the diameter to be less than 1-2 mm. The inner core of the formed gypsum ball has more and more uniform gaps, can store more heat and further has better temperature regulation effect. No matter which kind of fish tank filter material, the balling-up process of gypsum ball all need not high temperature sintering, and the building block can not take place volume and/or shape change at preparation process or use, and the heat can be stored in the transmission that the building block can be stable, and the wall body can not warp or break.
Preferably, the phase change material is one of stearic acid, paraffin, TAM-NPG and NPG-PE. The phase transition temperature ranges of the stearic acid and the paraffin are both 40-50 ℃, and the requirement of room temperature regulation is met. The TAM-NPG refers to a trihydroxymethyl aminomethane-neopentyl glycol binary system, the NPG-PE refers to a neopentyl glycol-pentaerythritol binary system, the phase transition temperature ranges of the polyol binary systems TAM-NPG and NPG-PE are both 30-41 ℃, and when the content of NPG in the mixture of the TAM-NPG or the NPG-PE is 50-90 wt%, the transition heat of the binary systems TAM-NPG or NPG-PE is large. The phase change temperature range of the four phase change materials is 15-50 ℃, the phase change latent heat is 190-245 kJ/kg, and the four phase change materials can be used as heat storage materials.
Preferably, the gypsum ball is made by the following method:
1) weighing raw materials according to a proportion, mixing the phase change material, the desulfurized gypsum and the fish tank filter material, adding water and stirring uniformly; the diameter of the fish tank filter material is 0.1-2 mm;
2) balling the stirred material obtained in the step 1) to obtain a gypsum ball inner core with the radius of 5-10 mm;
3) and (3) putting the inner core into an organic solvent containing styrene-butadiene latex, soaking for 30-60 min, taking out, airing, and coating an outer film with the thickness of 20-80 mu m on the outer surface of the inner core to obtain the gypsum ball.
In addition, a proper amount of styrene-butadiene latex can be added into the raw materials in the step 1) of the preparation method of the gypsum ball to increase the viscosity of the gypsum ball, and the styrene-butadiene latex accounts for 1-3 wt% of the desulfurized gypsum. Since the gypsum ball is dried in the air in the step 3) of the preparation method, the water is evaporated, and the content of the water in the finally prepared gypsum ball is negligible.
Further preferably, in the step 3) of the preparation method of the gypsum ball, the organic solvent is a mixed solvent of ethyl acetate and acetic acid in a volume ratio of (5-20) to 1, and the volume ratio of the styrene-butadiene latex to the organic solvent is 1 to (2-10). The organic solvent is a mixed solvent of ethyl acetate and acetic acid, can completely dissolve the styrene-butadiene latex, increases the cohesiveness of the desulfurized gypsum and the fish tank filter material by taking part of the styrene-butadiene latex as a binder during soaking, controls the stability of the spherical structure, increases the strength of the gypsum balls, and prolongs the service life of the gypsum balls. Taking out and airing after soaking, wrapping an outer film with the thickness of 20-80 mu m on the outer surface of the inner core of the gypsum ball when the organic solvent is volatilized and dispersed completely, wherein the radius of the obtained gypsum ball is 1.02-10.08 mm, and the outer film can be used as the shell of the ball to prevent the molten phase-change material from leaking; meanwhile, the thickness of the outer membrane is proper, so that heat can be well transferred between the gypsum ball core part and the gypsum slurry part of the building block, and the heat of the building block is uniformly distributed.
Also, preferably, in the step 3) of the preparation method of the gypsum ball, the mass ratio of the styrene-butadiene latex to the inner core of the gypsum ball is (1-5) to 100. The styrene-butadiene latex with the proportion not only can play the role of a binder, but also has reasonable and uniform thickness of the wrapped outer membrane.
Preferably, the gypsum slurry further comprises carbon nanotubes in the components. Surprisingly found in experiments, the strength and the bending and compression resistance of the building block can be obviously enhanced by adding the carbon nano tube, so that the strength is greatly improved, and the shock resistance is excellent.
Further preferably, the gypsum slurry consists of the following components in percentage by weight: 60-80% of desulfurized gypsum, 3-10% of beta semi-hydrated gypsum, 3-9% of an excitant, 3-20% of mineral powder, 0.01-0.03% of glass fiber, 0.2-0.6% of a defoaming agent, 0.4-1% of a naphthalene water reducer, 10-30% of water and 0.01-0.03% of a carbon nano tube. The addition of beta hemihydrate gypsum and/or glass fibers can significantly increase the strength of the block. Since the desulfurized gypsum produces small bubbles when mixed with water, the defoaming agent is added to eliminate foam and prevent excessive formation of voids. The activator can excite the activity of the desulfurized gypsum and the mineral powder, so that the desulfurized gypsum and the mineral powder can generate hydration reaction, and the water reducing rate is improved. The mineral powder has low cost, and the compressive strength, compactness, impermeability and erosion resistance of the building block are effectively improved. The carbon nano tube, the beta semi-hydrated gypsum, the glass fiber and the mineral powder are uniformly mixed to play a synergistic effect, so that the strength and the bending and compression resistance of the building block can be well enhanced, the strength is greatly improved, and the shock resistance is excellent.
Preferably, the gypsum slurry consists of the following components in percentage by weight: 65-78% of desulfurized gypsum, 4-9% of beta semi-hydrated gypsum, 4-8% of an excitant, 3-16% of mineral powder, 0.01-0.03% of glass fiber, 0.3-0.5% of a defoaming agent, 0.4-1% of a naphthalene water reducer, 10-22% of water and 0.01-0.03% of a carbon nano tube.
Preferably, the exciting agent is silicate clinker and caustic sludge, and the silicate clinker and the caustic sludge are matched to better excite the activity of the desulfurized gypsum and the mineral powder.
Preferably, the naphthalene water reducing agent is β -sodium naphthalene sulfonate formaldehyde condensate (molecular formula is (C)10H6CH2NaSO3)nAnd n is 9-12), the naphthalene water reducer is a special water reducer for gypsum, and not only can improve the strength of concrete, but also can improve various performances such as abrasion resistance, corrosion resistance, permeability resistance and the like.
Preferably, the desulfurized gypsum temperature-regulating block is prepared by the following method:
1) mixing the following components in percentage by weight to prepare gypsum slurry: 60-80% of desulfurized gypsum, 3-10% of beta semi-hydrated gypsum, 3-9% of an excitant, 3-20% of mineral powder, 0.01-0.03% of glass fiber, 0.2-0.6% of a defoaming agent, 0.4-1% of a naphthalene water reducer, 10-30% of water and 0.01-0.03% of a carbon nano tube;
2) mixing the raw materials in percentage by weight to form balls, and obtaining the gypsum ball inner core with the radius of 5-10 mm: 30-60% of a fish tank filter material, 10-45% of a phase change material, 20-40% of desulfurized gypsum and 2-8% of water; putting the inner core into an organic solvent containing styrene-butadiene latex, soaking for 30-60 min, taking out, airing, and coating an outer film with the thickness of 20-80 mu m on the outer surface of the inner core to obtain a gypsum ball;
3) mixing gypsum balls and gypsum slurry in a weight ratio of 1: 0.5-2, pouring and forming, performing steam curing under the conditions of normal pressure and 80-100 ℃, demolding, standing and airing to obtain the gypsum.
The invention aims to solve another technical problem of providing a preparation method of the desulfurized gypsum temperature-regulating building block, which has simple process, low cost and energy conservation.
The technical solution of the above problem is as follows: a preparation method of a desulfurized gypsum temperature-regulating building block comprises the following steps:
1) mixing the following components in percentage by weight to prepare gypsum slurry: 60-80% of desulfurized gypsum, 3-10% of beta semi-hydrated gypsum, 3-9% of an excitant, 3-20% of mineral powder, 0.01-0.03% of glass fiber, 0.2-0.6% of a defoaming agent, 0.4-1% of a naphthalene water reducer, 10-30% of water and 0.01-0.03% of a carbon nano tube;
2) mixing the raw materials in percentage by weight to form balls, and obtaining the gypsum ball inner core with the radius of 5-10 mm: 30-60% of a fish tank filter material, 10-45% of a phase change material, 20-40% of desulfurized gypsum and 2-8% of water; putting the inner core into an organic solvent containing styrene-butadiene latex, soaking for 30-60 min, taking out, airing, and coating an outer film with the thickness of 20-80 mu m on the outer surface of the inner core to obtain a gypsum ball;
3) mixing gypsum balls and gypsum slurry in a weight ratio of 1: 0.5-2, pouring and forming, performing steam curing under the conditions of normal pressure and 80-100 ℃, demolding, standing and airing to obtain the gypsum.
Compared with the prior art, the preparation method of the desulfurized gypsum temperature-regulating building block has the following remarkable advantages and beneficial effects: the raw materials adopted are wide in source and low in cost, and the preparation method is simple in process, easy to operate, free of three-waste emission, free of high-temperature calcination, energy-saving, emission-reducing, green and environment-friendly, and has good popularization and application prospects.
Preferably, the gypsum ball is made by the following method:
1) weighing raw materials according to a proportion, mixing the phase change material, the desulfurized gypsum and the fish tank filter material, adding water for mixing, and uniformly stirring;
2) balling the stirred material obtained in the step 1) to obtain a gypsum ball inner core with the radius of 5-10 mm;
3) and (3) putting the inner core into an organic solvent containing styrene-butadiene latex, soaking for 30-60 min, taking out, airing, and coating an outer film with the thickness of 20-80 mu m on the outer surface of the inner core to obtain the gypsum ball.
In conclusion, the beneficial effects of the invention are as follows:
1) the desulfurized gypsum temperature-regulating building block can automatically absorb and emit heat, realizes high absorption and low emission (high-temperature heat absorption and low-temperature heat release), automatically regulates the temperature in a building, reduces the fluctuation of indoor temperature, has the temperature regulation amplitude of 5-10 ℃, improves the comfort level of indoor living use, reduces the energy consumption of building operation, and has great application significance in building energy conservation and temperature control;
2) the compressive strength of the building block can reach 10MPa, and the application requirements of building materials are completely met;
3) the recycled industrial waste desulfurized gypsum is effectively utilized, and the comprehensive reutilization of waste resources is realized;
4) the adopted raw materials have wide sources and low cost, and the preparation method has simple process, easy operation, no three-waste discharge and no need of high-temperature calcination, thereby realizing energy conservation, emission reduction and high-efficiency utilization;
5) the heat conductivity coefficient of the building block prepared by the invention is 0.15-0.20W/(m.K), the building block meets the energy-saving standard of 50% of the existing newly-built building, and the comprehensive application effect is good.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.
The invention relates to a plurality of chemical substances, including desulfurized gypsum, fish tank filter material, volcanic rock, sintered ceramic stone, quartz spheres, styrene-butadiene latex, beta hemihydrate gypsum, stearic acid, paraffin, tris (hydroxymethyl) aminomethane, neopentyl glycol, pentaerythritol, silicate clinker, caustic sludge, mineral powder, glass fiber and carbon nano tubes, wherein the chemical substances can be purchased from markets. The phase-change material, the water reducing agent, the exciting agent and the defoaming agent are defined according to the performance in the field, and the specific material can also be obtained by commercial purchase.
In the desulfurized gypsum temperature-regulating building block and the preparation method thereof, a plurality of parameters such as weight percentage, time, radius, thickness and temperature are uniformly marked after the unit (such as%, min, mm, mum and DEG C) is at the upper limit, such as 30-60%, 30-60 min, 5-10 mm, 20-80μm and 80-100 ℃. Of course, the unit can be marked after the upper limit value and the lower limit value, such as 30-60%, 30-60 min, 5-10 mm, 20-80 μm, 80-100 ℃. The two parameter ranges can be expressed in any way, in the embodiment, values are taken from the upper limit value, the lower limit value and the middle value of the parameter, and the numerical values are all in units.
The following examples are not provided to limit the scope of the present invention, nor are the steps described to limit the order of execution. Modifications of the invention which are obvious to those skilled in the art in view of the prior art are also within the scope of the invention as claimed.
Product examples
The desulfurization gypsum temperature-regulating building block is prepared from a plurality of gypsum balls and gypsum slurry, and the specific component ratio and structural composition of the gypsum balls and the gypsum slurry are shown in tables 1-4.
TABLE 1 core composition examples of Gypsum pellets
Figure BDA0001595492450000071
The fish tank filter material can be volcanic rock, sintered ceramic stone or quartz ball.
The phase-change material can be stearic acid, paraffin, TAM-NPG, NPG-PE.
In the process of preparing the gypsum ball, water is required to be added, and the water accounts for 10-20% of the weight of the desulfurized gypsum.
Table 2 structural examples of gypsum balls
Figure BDA0001595492450000072
Table 3 gypsum slurry examples
Figure BDA0001595492450000073
Figure BDA0001595492450000081
The exciting agent is a compound of silicate clinker and caustic sludge.
The naphthalene water reducing agent is β -sodium naphthalene sulfonate formaldehyde condensate (molecular formula is (C)10H6CH2NaSO3)n，n＝9～12)
TABLE 4 desulfurized gypsum thermoregulation building block examples
Figure BDA0001595492450000082
In table 4, the proportions and structures of the gypsum ball components are selected according to tables 1 and 2, and the proportions of the gypsum slurry are selected according to table 3.
Method embodiment one
A preparation method of a desulfurized gypsum temperature-regulating building block comprises the following steps:
1) mixing the following components in percentage by weight to prepare gypsum slurry: 60% of desulfurized gypsum, 10% of beta-hemihydrate gypsum, 5% of silicate clinker, 4% of alkaline residue, 9.99% of mineral powder, 0.01% of glass fiber, 0.49% of defoaming agent, 0.5% of beta-sodium naphthalene sulfonate formaldehyde condensate, 10% of water and 0.01% of carbon nano tube;
2) mixing the materials in percentage by weight to form balls to obtain the gypsum ball inner core with the radius of 5 mm: 30% of volcanic rock, 45% of stearic acid, 20% of desulfurized gypsum and 5% of water; then putting into an organic solvent containing styrene-butadiene latex, soaking for 30min, taking out, airing, and coating an outer membrane with the thickness of 20 mu m on the outer surface of the inner core to obtain a gypsum ball;
3) mixing gypsum balls and gypsum slurry in a weight ratio of 1: 2, pouring and forming, carrying out steam curing under the conditions of normal pressure and 80 ℃, demoulding, standing and airing to obtain the desulfurized gypsum temperature-regulating building block.
The gypsum ball is prepared by the following method:
1) weighing raw materials according to a proportion, mixing the phase change material, the desulfurized gypsum and the fish tank filter material, adding water and stirring uniformly;
2) balling the stirred material obtained in the step 1) to obtain a gypsum ball inner core with the radius of 5 mm;
3) soaking the inner core in organic solvent containing styrene-butadiene latex for 30min, taking out, air drying, and coating outer membrane with thickness of 20 μm on the outer surface of the inner core to obtain gypsum ball; the organic solvent is a mixed solvent of ethyl acetate and acetic acid with the volume ratio of 5: 1, and the volume ratio of the butylbenzene latex to the organic solvent is 1: 2; the mass ratio of the styrene-butadiene latex to the inner core of the gypsum ball is 1: 100.
Method embodiment two
A preparation method of a desulfurized gypsum temperature-regulating building block comprises the following steps:
1) mixing the following components in percentage by weight to prepare gypsum slurry: 60% of desulfurized gypsum, 3% of beta hemihydrate gypsum, 1% of silicate clinker, 2% of alkaline residue, 3% of mineral powder, 0.03% of glass fiber, 0.44% of defoaming agent, 0.5% of beta-sodium naphthalene sulfonate formaldehyde condensate, 30% of water and 0.03% of carbon nano tube;
2) mixing the materials in percentage by weight to form balls to obtain a gypsum ball inner core with the radius of 10 mm: 60% of sintered ceramic stone, 10% of paraffin, 25% of desulfurized gypsum and 5% of water; soaking the inner core in an organic solvent containing styrene-butadiene latex for 60min, taking out, drying in the air, and coating an outer membrane with the thickness of 80 μm on the outer surface of the inner core to obtain a gypsum ball;
3) mixing gypsum balls and gypsum slurry according to the weight ratio of 2: 1, pouring and forming, carrying out steam curing under the conditions of normal pressure and 100 ℃, demoulding, standing and airing to obtain the desulfurized gypsum temperature-regulating building block.
The gypsum ball is prepared by the following method:
1) weighing raw materials according to a proportion, mixing the phase change material, the desulfurized gypsum and the fish tank filter material, adding water and stirring uniformly;
2) balling the stirred material obtained in the step 1) to obtain a gypsum ball inner core with the radius of 10 mm;
3) soaking the inner core in organic solvent containing styrene-butadiene latex for 60min, taking out, air drying, and coating outer membrane with thickness of 80 μm on the outer surface of the inner core to obtain gypsum ball; the organic solvent is a mixed solvent of ethyl acetate and acetic acid with the volume ratio of 20: 1, and the volume ratio of the butylbenzene latex to the organic solvent is 1: 10; the mass ratio of the styrene-butadiene latex to the inner core of the gypsum ball is 5: 100.
Method embodiment three
A preparation method of a desulfurized gypsum temperature-regulating building block comprises the following steps:
1) mixing the following components in percentage by weight to prepare gypsum slurry: 70% of desulfurized gypsum, 5% of beta hemihydrate gypsum, 1% of silicate clinker, 2% of alkaline residue, 6% of mineral powder, 0.02% of glass fiber, 0.26% of defoaming agent, 0.7% of beta-sodium naphthalene sulfonate formaldehyde condensate, 15% of water and 0.02% of carbon nano tube;
2) mixing the materials in percentage by weight to form balls to obtain the gypsum ball inner core with the radius of 8 mm: 50% of quartz balls, 20% of TAM-NPG, 25% of desulfurized gypsum and 5% of water; soaking the inner core in an organic solvent containing styrene-butadiene latex for 40min, taking out, drying in the air, and coating an outer membrane with the thickness of 40 μm on the outer surface of the inner core to obtain a gypsum ball;
3) mixing gypsum balls and gypsum slurry in a weight ratio of 1: 1, pouring and forming, carrying out steam curing under the conditions of normal pressure and 90 ℃, demoulding, standing and airing to obtain the desulfurized gypsum temperature-regulating building block.
The gypsum ball is prepared by the following method:
1) weighing raw materials according to a proportion, mixing the phase change material, the desulfurized gypsum and the fish tank filter material, adding water and stirring uniformly;
2) balling the stirred material obtained in the step 1) to obtain a gypsum ball inner core with the radius of 8 mm;
3) soaking the inner core in organic solvent containing styrene-butadiene latex for 40min, taking out, air drying, and coating outer membrane with thickness of 40 μm on the outer surface of the inner core to obtain gypsum ball; the organic solvent is a mixed solvent of ethyl acetate and acetic acid with the volume ratio of 10: 1, and the volume ratio of the butylbenzene latex to the organic solvent is 1: 5; the mass ratio of the styrene-butadiene latex to the inner core of the gypsum ball is 2: 100.
Method example four
A preparation method of a desulfurized gypsum temperature-regulating building block comprises the following steps:
1) mixing the following components in percentage by weight to prepare gypsum slurry: 80% of desulfurized gypsum, 3% of beta hemihydrate gypsum, 1% of silicate clinker, 2% of alkaline residue, 3% of mineral powder, 0.01% of glass fiber, 0.56% of defoaming agent, 0.4% of beta-sodium naphthalene sulfonate formaldehyde condensate, 10% of water and 0.03% of carbon nano tube;
2) mixing the materials in percentage by weight to form balls to obtain the gypsum ball inner core with the radius of 7 mm: 50% of quartz balls, 20% of NPG-PE, 25% of desulfurized gypsum and 5% of water; soaking the inner core in an organic solvent containing styrene-butadiene latex for 50min, taking out, drying in the air, and coating an outer membrane with the thickness of 60 mu m on the outer surface of the inner core to obtain a gypsum ball;
3) mixing gypsum balls and gypsum slurry in a weight ratio of 1: 1, pouring and forming, carrying out steam curing under the conditions of normal pressure and 90 ℃, demoulding, standing and airing to obtain the desulfurized gypsum temperature-regulating building block.
The gypsum ball is prepared by the following method:
1) weighing raw materials according to a proportion, mixing the phase change material, the desulfurized gypsum and the fish tank filter material, adding water and stirring uniformly;
2) balling the stirred material obtained in the step 1) to obtain a gypsum ball inner core with the radius of 7 mm;
3) soaking the inner core in organic solvent containing styrene-butadiene latex for 50min, taking out, air drying, and coating outer membrane with thickness of 60 μm on the outer surface of the inner core to obtain gypsum ball; the organic solvent is a mixed solvent of ethyl acetate and acetic acid with the volume ratio of 10: 1, and the volume ratio of the butylbenzene latex to the organic solvent is 1: 4; the mass ratio of the styrene-butadiene latex to the inner core of the gypsum ball is 4: 100.
Product testing
1. The compressive strength of the building block prepared by the invention can reach 10MPa, and the application requirement of building materials is completely met.
2. The heat conductivity coefficient is 0.15-0.20W/(m.K), the energy-saving building meets the energy-saving standard of 50% of the existing newly-built buildings, and the comprehensive application effect is good.
3. The temperature adjusting range is more than 30 ℃ or less than 10 ℃, and when the external temperature reaches the range, the temperature of the building block is adjusted, and the temperature adjusting range is 5-10 ℃.
4. Durability: the mass loss is less than 5 percent and the strength loss is less than 20 percent after 25 times of freeze thawing.
5. Thermal resistance of wall, R is more than or equal to 0.70 (m)2·K)/W。
6. Taking a wall with the thickness of 240mm as an example, the equivalent thermal conductivity coefficient lambdae of the wall is less than or equal to 0.32W/(m.K).
7. The measured value of the phase change latent heat of the desulfurization gypsum sphere is 65-78 kJ/kg, which means that the heat storage capacity of the gypsum sphere is very high, and thus the heat storage capacity of the building block is also very high.

Claims (7)

1. The desulfurization gypsum temperature-regulating building block is characterized by being formed by mixing and pouring a plurality of gypsum balls and gypsum slurry, wherein the components of the gypsum balls and the gypsum slurry contain desulfurization gypsum, each gypsum ball comprises an inner core and an outer film wrapping the inner core, and the inner core of each gypsum ball comprises the following components in percentage by weight: 30-60% of a fish tank filter material, 10-45% of a phase change material and 20-40% of desulfurized gypsum;
the weight ratio of the gypsum balls to the gypsum slurry is 1: 0.5-2;
the phase-change material is one of stearic acid, TAM-NPG and NPG-PE;
the gypsum ball is prepared by the following method:
1) weighing raw materials according to a proportion, mixing the phase change material, the desulfurized gypsum and the fish tank filter material, adding water and stirring uniformly; the diameter of the fish tank filter material is 0.1-2 mm;
2) balling the stirred material obtained in the step 1) to obtain a gypsum ball inner core with the radius of 5-10 mm;
3) and (3) putting the inner core into an organic solvent containing styrene-butadiene latex, soaking for 30-60 min, taking out, airing, and coating an outer film with the thickness of 20-80 mu m on the outer surface of the inner core to obtain the gypsum ball.
2. The desulfurization gypsum temperature-regulating building block according to claim 1, wherein the fish tank filter material is one of volcanic rock, sintered ceramic stone and quartz balls.
3. The desulfurized gypsum thermoregulation building block of claim 1, wherein the organic solvent in the step 3) is a mixed solvent of ethyl acetate and acetic acid in a volume ratio of (5-20) to 1, and the volume ratio of the styrene-butadiene latex to the organic solvent is 1 to (2-10).
4. The desulfurized gypsum thermoregulation building block of claim 3, wherein the mass ratio of the styrene-butadiene latex to the gypsum ball inner core in the step 3) is (1-5) to 100.
5. The desulfurized gypsum thermoregulation block of claim 1, wherein the gypsum slurry further comprises carbon nanotubes in the constituents.
6. The desulfurized gypsum thermoregulation block of claim 5, wherein the gypsum slurry comprises the following components in weight percent: 60-80% of desulfurized gypsum, 3-10% of beta semi-hydrated gypsum, 3-9% of an excitant, 3-20% of mineral powder, 0.01-0.03% of glass fiber, 0.2-0.6% of a defoaming agent, 0.4-1% of a naphthalene water reducer, 10-30% of water and 0.01-0.03% of a carbon nano tube.
7. The preparation method of the desulfurized gypsum temperature-regulating building block is characterized by comprising the following steps of:
1) mixing the following components in percentage by weight to prepare gypsum slurry: 60-80% of desulfurized gypsum, 3-10% of beta semi-hydrated gypsum, 3-9% of an excitant, 3-20% of mineral powder, 0.01-0.03% of glass fiber, 0.2-0.6% of a defoaming agent, 0.4-1% of a naphthalene water reducer, 10-30% of water and 0.01-0.03% of a carbon nano tube;
2) mixing the raw materials in percentage by weight to form balls, and obtaining the gypsum ball inner core with the radius of 5-10 mm: 30-60% of a fish tank filter material, 10-45% of a phase change material, 20-40% of desulfurized gypsum and 2-8% of water; putting the inner core into an organic solvent containing styrene-butadiene latex, soaking for 30-60 min, taking out, airing, and coating an outer film with the thickness of 20-80 mu m on the outer surface of the inner core to obtain a gypsum ball;
3) mixing gypsum balls and gypsum slurry in a weight ratio of 1: 0.5-2, pouring and forming, performing steam curing under the conditions of normal pressure and 80-100 ℃, demolding, standing and airing to obtain the desulfurized gypsum temperature-regulating building block.
CN201810204423.3A 2018-03-13 2018-03-13 Desulfurized gypsum temperature-regulating building block and preparation method thereof Active CN108218376B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810204423.3A CN108218376B (en) 2018-03-13 2018-03-13 Desulfurized gypsum temperature-regulating building block and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810204423.3A CN108218376B (en) 2018-03-13 2018-03-13 Desulfurized gypsum temperature-regulating building block and preparation method thereof

Publications (2)

Publication Number Publication Date
CN108218376A CN108218376A (en) 2018-06-29
CN108218376B true CN108218376B (en) 2020-08-28

Family

ID=62658421

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810204423.3A Active CN108218376B (en) 2018-03-13 2018-03-13 Desulfurized gypsum temperature-regulating building block and preparation method thereof

Country Status (1)

Country Link
CN (1) CN108218376B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101858121A (en) * 2010-06-23 2010-10-13 白建国 Heat-storage heat-preserving building block and manufacturing and installation method
CN102659377A (en) * 2012-04-28 2012-09-12 昆明理工大学 Thermal preservation energy saving composite phase change energy storage gypsum board prepared by using phosphorous gypsum and preparation method thereof
CN102827583A (en) * 2012-08-03 2012-12-19 上海英硕聚合材料股份有限公司 Phase change composite material and preparation method thereof
CN103964805A (en) * 2014-05-27 2014-08-06 哈尔滨工业大学 Preparation method of coal ash-desulphurization gypsum thermal-insulation board

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130134347A1 (en) * 2011-05-02 2013-05-30 Michael Hugh Edgar Composite Structures with Phase Change Material and Adsorbent and Encapsulant Materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101858121A (en) * 2010-06-23 2010-10-13 白建国 Heat-storage heat-preserving building block and manufacturing and installation method
CN102659377A (en) * 2012-04-28 2012-09-12 昆明理工大学 Thermal preservation energy saving composite phase change energy storage gypsum board prepared by using phosphorous gypsum and preparation method thereof
CN102827583A (en) * 2012-08-03 2012-12-19 上海英硕聚合材料股份有限公司 Phase change composite material and preparation method thereof
CN103964805A (en) * 2014-05-27 2014-08-06 哈尔滨工业大学 Preparation method of coal ash-desulphurization gypsum thermal-insulation board

Also Published As

Publication number Publication date
CN108218376A (en) 2018-06-29

Similar Documents

Publication Publication Date Title
Wang et al. Influence of phase change material on mechanical and thermal properties of clay geopolymer mortar
Wang et al. Preparation and properties of fatty acids based thermal energy storage aggregate concrete
Kastiukas et al. Development and optimisation of phase change material-impregnated lightweight aggregates for geopolymer composites made from aluminosilicate rich mud and milled glass powder
Gencel et al. Properties of eco-friendly foam concrete containing PCM impregnated rice husk ash for thermal management of buildings
CN108726908B (en) Preparation method of artificial composite lightweight aggregate for foam concrete and artificial composite lightweight aggregate
CN103755274A (en) Aerated concrete block and preparation method thereof
CN102765905B (en) EPS light aggregate concrete composite wall and its construction method
CN104230280A (en) Low-shrinkage sludge ceramsite alkali-activated full-slag foam concrete plate and preparation method thereof
CN111747691B (en) High-crack-resistance foam concrete and preparation method thereof
CN101698614B (en) Ultramicropore high-intensity heat insulation refractory bricks and method for making same
Ismail et al. Microencapsulation of bio-based phase change materials with silica coated inorganic shell for thermal energy storage
CN104944819A (en) Phase change energy storage aggregate and preparation method thereof
CN110627443A (en) Preparation method of regenerative composite building thermal insulation material
CN105016636A (en) Supersulphated foamed cement insulation board and preparation process thereof
CN101531491B (en) Fireproof anti-cracking high-strength potential heat mortar
Gencel et al. Development, characterization, and performance analysis of shape‐stabilized phase change material included‐geopolymer for passive thermal management of buildings
CN111960752A (en) Phase-change heat storage wall material for building maintenance and preparation method thereof
CN115043610A (en) Concrete anti-cracking agent, anti-cracking concrete and preparation method thereof
Li et al. Study of a novel hollow ceramsite compounded with paraffin phase change materials for energy storage
CN102485686A (en) Fiber composite phase-transition concrete material and preparation method thereof
CN108218376B (en) Desulfurized gypsum temperature-regulating building block and preparation method thereof
CN105924120B (en) A kind of water proof anti-seepage phase-change energy-storage gypsum building block and preparation method thereof
CN115724630B (en) Phase-change energy-storage plastering mortar and preparation method thereof
CN109516754B (en) Lightweight phase-change aerated concrete, masonry wall and construction method thereof
CN112897915B (en) Preparation method of high-alumina fly ash chloride ion combined ceramic sand with core-shell structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant