CN112624716B - Mortar and application thereof, wallboard and preparation method and application thereof - Google Patents
Mortar and application thereof, wallboard and preparation method and application thereof Download PDFInfo
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- CN112624716B CN112624716B CN202011452342.9A CN202011452342A CN112624716B CN 112624716 B CN112624716 B CN 112624716B CN 202011452342 A CN202011452342 A CN 202011452342A CN 112624716 B CN112624716 B CN 112624716B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/288—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
- E04C2/2885—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material with the insulating material being completely surrounded by, or embedded in, a stone-like material, e.g. the insulating material being discontinuous
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/0875—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements having a basic insulating layer and at least one covering layer
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides mortar and application thereof, a wallboard and a preparation method and application thereof, wherein the mortar comprises the following raw materials in parts by weight: 20 to 40 portions of cement, 2 to 5 portions of calcium silicate hydrate crystal whisker, 0.1 to 1 portion of early strength agent, 5 to 10 portions of gypsum, 5 to 10 portions of aluminate cement, 35 to 60 portions of graded sand, 1 to 3 portions of latex powder, 0.1 to 0.5 portion of water reducing agent, 0.05 to 0.4 portion of defoaming agent, 0.03 to 0.1 portion of cellulose and 0.03 to 0.2 portion of plastic expanding agent. The mortar of the invention not only has the properties of early strength, high flow state, low shrinkage, good homogeneity, high smoothness and the like, but also has good compressive strength and fluidity.
Description
Technical Field
The invention relates to mortar and application thereof, and a wallboard and a preparation method and application thereof.
Background
The traditional building wallboard generally adopts the forms of cement foaming, autoclaved Lightweight Concrete (ALC), gypsum foaming, lightweight aggregate wall and the like, but the foaming material is loose and porous, has high water absorption rate, large dry shrinkage deformation, poor freeze-thaw resistance and very common cracking problem. The lightweight aggregate wallboard is generally filled with polyphenyl granule mortar, ceramsite, perlite and slag, and if the mechanical property index of the wallboard is met, the density is higher and the heat conductivity coefficient is large, the national requirement for increasing the heat preservation and energy conservation of the wall in the fabricated structure cannot be met.
Patent 201911106783.0 discloses an assembled foam concrete composite sandwich wallboard and a preparation method thereof, wherein a heat insulation core material foamed by cement chemistry and cement mortar boards on two sides are compounded by adopting a flat die process, and a mortar surface layer contains mesh cloth or a steel wire mesh to increase the overall strength. Wherein the proportion of the foaming core material is as follows: 70-75 parts of Portland cement, 25-29 parts of II-grade fly ash, 0.3-0.5 part of polypropylene fiber, 0.3-0.5 part of wood fiber, 6-8 parts of hydrogen peroxide foaming agent and 0.3-0.9 part of foam stabilizer. The proportion of the surface mortar is as follows: 70-75 parts of cement, 20-30 parts of fly ash, 18-20 parts of vermiculite, 0.3-0.9 part of rubber powder and 0.2-0.4 part of cellulose.
Patent 201920195280.4 discloses an improved composite sandwich wallboard, wherein a rock wool board is adopted as a core material in the middle, gypsum boards or cement mortar boards are adopted on two sides, and the boards on the two sides contain fiber nets to form a sandwich structure. The fiber net extends from two adjacent sides of the composite sandwich wallboard to the outside of the composite sandwich wallboard, and two outer skin surfaces of the other two adjacent sides of the composite sandwich wallboard are provided with concave surfaces corresponding to the fiber net extending to the outside of the composite sandwich wallboard. The male mortise and the female mortise on the two sides are correspondingly connected, and the concave surface is filled with gypsum or cement mortar.
Patent 201911106783.0 discloses an assembled foam concrete composite sandwich wallboard and a preparation method thereof, wherein a surface layer and a core material are made of ordinary cement and fly ash, the hardening speed is low, the early strength is low, the efficiency is low, and no method is available for automatic production design; meanwhile, the flat die has the defects that the flatness of one side of the bottom close to the die is good, the surface layer is manually manufactured, and the flatness cannot be guaranteed; mortar on two sides of the heat-insulating core material is only internally provided with mesh cloth or steel wire meshes and is not pulled straight or obliquely through the abdominal wires, the two sides cannot be connected together structurally, and the compressive strength cannot be guaranteed. At the same time, the density of the foamed cement core material is between 252.2 and 333.6Kg/m 3 The density is too high, the heat preservation effect is poor, the heat conductivity coefficient is more than 0.065W/m.k, and the energy-saving requirement of the country on the wall body cannot be met.
Patent 201920195280.4 discloses an improved generation composite sandwich wallboard, uses the core as rock wool, contains the fibre web in both sides gypsum or the cement mortar, and does not through the straight drawing of reinforcing bar binder or draw to one side, and both sides can not be in the same place from structural connection, and compressive strength is from no assurance. Meanwhile, the rock wool board is soft in texture and extremely large in deformation, the whole thermal insulation board cannot be produced by a vertical die process, only a manual flat die with extremely low efficiency is used, and the efficiency cannot meet the market demand at all.
Therefore, a new mortar material is urgently needed to be provided, which not only meets the national requirements on the wall body, but also has the characteristics of high early strength, high flow state, low shrinkage, good homogeneity, high smoothness and the like.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a mortar material which not only meets the national requirements on walls, but also has the characteristics of good compressive strength, early strength, high flow state, low shrinkage, good uniformity, high smoothness and the like.
In a first aspect, the invention provides mortar, which comprises the following raw materials in parts by weight: 25-50 parts of cement, 2-5 parts of calcium silicate hydrate crystal whiskers, 0.1-1 part of an early strength agent, 5-10 parts of gypsum, 5-10 parts of aluminate cement, 35-60 parts of graded sand, 1-3 parts of latex powder, 0.2-0.5 part of a water reducing agent, 0.05-0.3 part of an antifoaming agent, 0.03-0.09 part of cellulose and 0.03-0.17 part of a plastic expanding agent, wherein the cement comprises 5-10 parts of aluminate cement.
The mortar provided by the invention not only has the performances of early strength, high flow state, low shrinkage, good homogeneity, high smoothness and the like, but also has good compressive strength and fluidity, wherein the compressive strength in 4 hours is more than or equal to 20MPa, the compressive strength in 28 days is more than or equal to 80MPa, the flexural strength in 28 days is more than or equal to 15MPa, the initial fluidity is more than or equal to 320mm, the fluidity in 60min is more than or equal to 300mm, and the size change rate is-0.01%.
The graded sand in the invention refers to sand material with the particle size of 20-50 meshes.
In the invention, the hydration calcium silicate whisker (C-S-H) powder can reduce the total hydration heat and nucleation barrier of cement and advance the hydration exothermic peak; the C-S-H powder mainly plays a role of a seed crystal in the cement hydration reaction process; within a certain C-S-H powder mixing amount range (2-5%), the cement hydration process conforms to the rules of crystallization nucleation and crystal growth, so that the early hardening of the mortar material is accelerated, and the later strength is greatly promoted.
As a particular embodiment of the invention, the graded sand has a particle size no greater than 5mm, for example, in the range of 1mm,2mm,3mm,4mm,5mm, and any combination thereof.
As a specific embodiment of the present invention, the calcium silicate hydrate whiskers are spherical nanomaterials.
As a specific embodiment of the invention, the calcium silicate hydrate whiskers have a particle size in the range of 50nm to 100nm, for example in the range of 50nm,60nm,70nm,80nm,90nm,100nm, and any combination thereof.
The cement also at least comprises one of Portland cement, fly ash cement, slag cement and pozzolana cement; and/or the early strength agent is at least one selected from sodium sulfate, sodium thiosulfate, calcium chloride, calcium formate, triethanolamine, lithium carbonate and lithium sulfate; and/or the aluminate cement is at least one selected from sulpho-aluminate cement and aluminate cement clinker; and/or the graded sand is at least one selected from natural sand and artificial sand, such as river sand, sea sand, machine-made sand, artificial sand and tailings sand; and/or the latex powder is at least one selected from ethylene-vinyl acetate, acrylic acid, emulsified asphalt, polyvinyl alcohol and ethylene-vinyl acetate copolymer and organic emulsion prepared from any one of the above; and/or the water reducing agent is at least one selected from polycarboxylic acid water reducing agent, melamine, naphthalene water reducing agent, sulfamate and melamine water reducing agent; and/or the defoaming agent is at least one selected from organic silicon defoaming agent, mineral oil defoaming agent, tributyl phosphate and polyether defoaming agent; and/or the cellulose is at least one selected from methyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose and carboxymethyl cellulose; and/or, the plastic expanding agent is at least one selected from hydrazine sulfate, aluminum powder, sodium percarbonate and azodicarbonamide (AC foaming agent).
The above raw materials in the present invention may be prepared by themselves or may be obtained commercially, and the present invention is not particularly limited thereto.
In a second aspect, the invention provides application of the mortar in the fields of building materials, finishing materials and decorating materials.
In a third aspect, the present invention provides a wallboard, the face mortar of which comprises any one of the mortars described above.
The wallboard meets the standard requirements of JC/T2504-2019 prefabricated concrete sandwich heat-insulation wallboard for prefabricated buildings and T/CBMF86-2020 lightweight partition board for prefabricated buildings. The panel splicing is tight, the surface is smooth, the filling mortar has high flow state and plastic expansion function, and the gap can be filled compactly and fully.
As a specific embodiment of the invention, the core material of the inner layer of the wallboard is a thermosetting polystyrene foam insulation board, and the model number of the insulation board is JG/T536-2017.
Preferably, the polystyrene foam heat-insulation board has an A-level fireproof function and a good fireproof function.
More preferably, the density of the polystyrene foam insulation board is not more than 150Kg/m 3 E.g. 20Kg/m 3 ,50Kg/m 3 ,70Kg/m 3 ,90Kg/m 3 ,110Kg/m 3 ,130Kg/m 3 ,150Kg/m 3 And any combination thereof; a thermal conductivity of no greater than 0.045W/m.k, e.g., in the range of 0.01W/m.k, 0.02W/m.k, 0.03W/m.k, 0.04W/m.k, and any combination thereof; the compressive strength is not less than 0.2MPa, such as the ranges of 0.4MPa,0.8MPa,1.6MPa and any combination thereof, and the requirements of JG536-2017 thermosetting composite polystyrene foam insulation boards are met.
In a fourth aspect, the invention provides the use of said wall panels in the building, finishing and decorative fields.
In a fifth aspect, the invention provides a method for making the wallboard.
The preparation method of the wallboard comprises the following steps: and (3) placing the core material of the inner layer of the wallboard into a mold, reserving a cavity, mixing the mortar, pumping into the cavity of the mold, and pouring to prepare the wallboard.
The wallboard prepared by the method meets the standard requirements of JC/T2504-2019 prefabricated concrete sandwich thermal insulation wallboard for prefabricated buildings and T/CBMF86-2020 lightweight partition board for prefabricated buildings. The panel splicing is tight, the surface is smooth, the filling mortar has high flow state and plastic expansion function, and the gap can be filled compactly and fully.
The preparation method of the wallboard can be used for continuous operation of mechanization, scale, automation and intellectualization, can be used for turnover demoulding within 4 hours, has the compressive strength of more than or equal to 5MPa, and has good heat preservation effect and good fire resistance limit.
As a specific embodiment of the invention, the concrete steps of mixing the mortar comprise: stirring for 3min to 10min at a rotating speed of 200rad/min to 500 rad/min.
As a particular embodiment of the invention, the pumping pressure is in the range of 0.2MPa to 0.5MPa, such as 0.2MPa,0.3MPa,0.4MPa,0.5MPa, and any combination thereof.
As a specific embodiment of the present invention, the wallboard has a face mortar density of not greater than 130Kg per square meter, for example, 20Kg per square meter, 50Kg per square meter, 70Kg per square meter, 100Kg per square meter, 130Kg per square meter and any combination thereof.
Specifically, a thermosetting composite insulation board can be selected as a core material, two sides of the thermosetting composite insulation board are inserted by meshes with 5mm multiplied by 5mm or similar specifications of steel wire meshes, the steel wire meshes on the two sides are limited and reinforced by adopting a method of combining straight pulling and inclined pulling, and a cavity for pouring inorganic slurry is reserved; then stirring the mortar for 3-10 min at a rotating speed of 200-500 rad/min, pumping by a pumping machine with a pumping pressure of 0.2-0.5 MPa, and automatically injecting the mortar above the three-dimensional mold through a pipeline for pouring; pumping the pipeline into the reserved cavity to form the plastering-free fabricated light heat-insulating wallboard with the surface being super-flat and the surface being less than or equal to 130 Kg/square meter (taking the thickness of 120mm as an example). The wallboard adopts both sides tongue-and-groove to be the concave groove structure, and in the installation, two concave grooves butt joint back, can pour the same material with surface course mortar in the centre.
The mortar provided by the invention not only has the performances of early strength, high flow state, low shrinkage, good homogeneity, high smoothness and the like, but also has good compressive strength and fluidity, wherein the compressive strength in 4 hours is more than or equal to 20MPa, the compressive strength in 28 days is more than or equal to 80MPa, the flexural strength in 28 days is more than or equal to 15MPa, the initial fluidity is more than or equal to 320mm, the fluidity in 60min is more than or equal to 300mm, and the size change rate is-0.01%. The wallboard provided by the invention meets the standard requirements of JC/T2504-2019 prefabricated concrete sandwich thermal insulation wallboard for prefabricated buildings and T/CBMF86-2020 lightweight partition board for prefabricated buildings. The panel splicing is tight, the surface is smooth, the filling mortar has high flow state and plastic expansion function, and the gap can be filled compactly and fully. The preparation method of the wallboard can be used for continuous operation of mechanization, scale, automation and intellectualization, can be used for turnover demoulding within 4 hours, has the compressive strength of more than or equal to 5MPa, and has good heat preservation effect and good fire resistance limit.
Drawings
FIG. 1 is a schematic cross-sectional view of a wall panel in an embodiment of the present invention;
wherein, 1-mortar surface layer, 2-reinforcing steel bar net rack and 3-thermosetting polystyrene foam insulation board; 4-reinforcing steel bar binder; 5-concave mortise and tenon.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention in any way.
The thermosetting polystyrene foam insulation board with the A-level fireproof function used in each embodiment of the invention has the model number of JG/T536-2017.
Example 1
Example 1 proposes a wallboard, the preparation method of which comprises the following steps:
(1) The mortar raw material is stirred for 5min at the rotating speed of 300rad/min and mixed and added with proper amount of water. The mortar comprises the following raw materials in parts by weight: 20 parts of ordinary portland cement (ordinary portland cement), 4 parts of calcium silicate hydrate whiskers, 0.2 part of sodium sulfate, 8 parts of gypsum, 10 parts of aluminate cement, 3242 parts of tailing sand 56.13 parts of ethylene-vinyl acetate redispersible latex powder, 0.3 part of polycarboxylic acid water reducing agent, 0.2 part of organic silicon defoamer, 0.07 part of methyl hydroxypropyl cellulose and 0.1 part of hydrazine sulfate plastic expanding agent.
Wherein the grain size of the tailing sand is not more than 5mm; the particle size of the calcium silicate hydrate crystal whisker is 70nm.
(2) Putting a thermosetting polystyrene foam insulation board 3 with an A-level fireproof function into a mold, fixing the board by a reinforcing steel bar net rack 2 with reinforcing steel bar binder 4, reserving a cavity, pumping mixed mortar into the cavity of the mold for pouring, preparing a mortar surface layer, adopting a structure that mortises on two sides are concave mortises 5, pouring a material which is the same as the mortar of the surface layer in the middle after the two concave mortises are butted in the installation process, and preparing to obtain the wallboard, wherein the material is shown in figure 1.
Examples 2 to 10
The wallboard preparation method of examples 2-10 is the same as example 1, except that the face mortar mix ratio is different, as detailed in table 1.
TABLE 1 mortar ratio of wall board surface layer of each example (parts by weight)
The performance indicators for the wallboard face layer mortars of examples 1-10 were tested and the results are shown in table 2.
Rate of change in size: adopting standard JC/T985-2017 cement-based self-leveling mortar for floors;
the pressure bleeding adopts the standard: GB/T50080-2002 'test method for common concrete mixture performance';
other test items all adopt the standard: GB50448-2008 technical Specification for cement-based grouting materials.
TABLE 2 mortar Performance indices for wallboard facings of examples 1-10
The wallboard performance indicators of examples 1-10 were tested and the standard was performed: T/CBMF86-2020 light partition board for prefabricated building, the results are shown in Table 3.
Table 3 wallboard performance indicators for examples 1-10
As can be seen from Table 3, the density of the polystyrene foam insulation board in the embodiment of the invention is not more than 150Kg/m 3 The heat conductivity coefficient is not more than 0.045W/m.k, and the compressive strength is not less than 0.2MPa. The surface mortar density of the wallboard is not more than130Kg/㎡。
In conclusion, the mortar disclosed by the invention not only has the performances of early strength, high flow state, low shrinkage, good uniformity, high smoothness and the like, but also has good compressive strength and fluidity, wherein the compressive strength in 4 hours is more than or equal to 20MPa, the compressive strength in 28 days is more than or equal to 80MPa, the flexural strength in 28 days is more than or equal to 15MPa, the initial fluidity is more than or equal to 320mm, the fluidity in 60min is more than or equal to 300mm, and the size change rate is-0.01%. The wallboard provided by the invention meets the standard requirements of JC/T2504-2019 prefabricated concrete sandwich thermal insulation wallboard for prefabricated buildings and T/CBMF86-2020 lightweight partition board for prefabricated buildings. The panel splicing is tight, the surface is smooth, the filling mortar has the functions of high flow state and plastic expansion, and the gap can be filled compactly and fully. The preparation method of the wallboard can be used for mechanical, large-scale, automatic and intelligent continuous operation, can be used for overturning and demoulding after 4 hours, and has the advantages of compression strength of more than or equal to 5MPa, good heat preservation effect and good fire resistance limit.
Any numerical value mentioned in this specification, if there is only a two unit interval between any lowest value and any highest value, includes all values from the lowest value to the highest value incremented by one unit at a time. For example, if it is stated that the amount of a component, or a value of a process variable such as temperature, pressure, time, etc., is 50 to 90, it is meant in this specification that values of 51 to 89, 52 to 88 … … and 69 to 71 and 70 to 71 are specifically enumerated. For non-integer values, units of 0.1, 0.01, 0.001, or 0.0001 may be considered as appropriate. These are only some specifically named examples. In a similar manner, all possible combinations of numerical values between the lowest value and the highest value enumerated are to be considered to be disclosed in this application.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (13)
1. The mortar is characterized by comprising the following raw materials in parts by weight: 33 parts of ordinary portland cement, 3 parts of calcium silicate hydrate crystal whiskers, 0.3 part of sodium sulfate, 10 parts of gypsum, 7 parts of aluminate cement, 43.79 parts of tailing sand, 2.3 parts of ethylene-vinyl acetate redispersible latex powder, 0.22 part of a polycarboxylic acid water reducing agent, 0.02 part of an organic silicon defoaming agent, 0.04 part of methyl hydroxypropyl cellulose and 0.15 part of a hydrazine sulfate plastic expanding agent, wherein the water-material ratio is 0.14.
2. The screed according to claim 1, wherein the tailings sand has a particle size of no more than 5mm.
3. Mortar according to claim 2, characterized in that the calcium silicate hydrate whiskers have a particle size of 70nm.
4. Use of the mortar of any one of claims 1 to 3 in the fields of building materials, finishing materials, and finishing materials.
5. A wallboard wherein the facing mortar of the wallboard comprises the mortar of any of claims 1-3.
6. The wall panel of claim 5, wherein the wall panel inner core material is a thermoset polystyrene foam insulation board.
7. The wall panel of claim 6, wherein the polystyrene foam insulation board has a class A fire protection function.
8. The wall panel of claim 7, wherein the polystyrene foam insulation board has a non-densityGreater than 150Kg/m 3 The heat conductivity coefficient is not more than 0.045W/m.k, and the compressive strength is not less than 0.2MPa.
9. Use of the wallboard of any of claims 5-8 in construction, finishing and decoration.
10. A method of making the wallboard of any of claims 5-8 comprising the steps of:
and (3) placing the core material of the inner layer of the wallboard into a mold, reserving a cavity, mixing the mortar, pumping into the cavity of the mold, and pouring to prepare the wallboard.
11. The method of making a wallboard of claim 10, wherein the step of mixing the mortar comprises: stirring for 3min to 10min at a rotating speed of 200rad/min to 500 rad/min.
12. A method of making a wallboard according to claim 11 wherein the pumping pressure is between 0.2MPa and 0.5MPa.
13. A method of making a wallboard according to any one of claims 10 to 12 wherein the wallboard has a face mortar density of no greater than 130 Kg/m 3 。
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| CN202011452342.9A CN112624716B (en) | 2020-12-10 | 2020-12-10 | Mortar and application thereof, wallboard and preparation method and application thereof |
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| CN202011452342.9A CN112624716B (en) | 2020-12-10 | 2020-12-10 | Mortar and application thereof, wallboard and preparation method and application thereof |
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| CN112624716A CN112624716A (en) | 2021-04-09 |
| CN112624716B true CN112624716B (en) | 2022-11-15 |
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