CN109694228A - A kind of gypsum based self-leveling mortar and preparation method thereof and gypsum based self-leveling slurry - Google Patents

A kind of gypsum based self-leveling mortar and preparation method thereof and gypsum based self-leveling slurry Download PDF

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CN109694228A
CN109694228A CN201710995920.5A CN201710995920A CN109694228A CN 109694228 A CN109694228 A CN 109694228A CN 201710995920 A CN201710995920 A CN 201710995920A CN 109694228 A CN109694228 A CN 109694228A
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aeroge
gypsum
sio
based self
water
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CN109694228B (en
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王丽
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Beijing New Building Material Group Co Ltd
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Beijing New Building Material Group Co Ltd
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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
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • C04B28/147—Calcium sulfate hemi-hydrate with a specific crystal form beta-hemihydrate
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • C04B14/064—Silica aerogel
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • 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
    • C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
    • 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
    • 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

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

Abstract

A kind of gypsum based self-leveling mortar and preparation method thereof, the gypsum based self-leveling mortar includes SiO2Aeroge, portland cement, desulfurized gypsum, retarder, water-reducing agent, latex powder, stabilizer and filler prepare the SiO using following methods2Aeroge: the silane coupling agent is configured to silane coupler solution with water；By the hydrophobicity SiO2Aeroge is added in the silane coupler solution, stirring to the hydrophobicity SiO2Aeroge is completely dissolved in the silane coupler solution；The preparation method of the gypsum based self-leveling mortar includes: with silane coupling agent surface-modified hydrophobic SiO2Aeroge；By modified SiO2Aeroge is mixed with portland cement, ball milling；Other components are added, are uniformly mixed.Present invention also provides the gypsum based self-leveling slurries using the preparation of above-mentioned gypsum based self-leveling mortar.The gypsum based self-leveling mortar and slurry of the application has good insulation, sound insulation value.

Description

A kind of gypsum based self-leveling mortar and preparation method thereof and gypsum based self-leveling slurry
Technical field
This application involves but be not limited to New Building Materials technical field, more particularly to but be not limited to a kind of gypsum Based self-leveling mortar and preparation method thereof and gypsum based self-leveling slurry.
Background technique
Desulfurized gypsum is the industrial residue generated after means of flue gas desulfurization of power plant, and the annual emissions of desulfurized gypsum are up to 7000 at present Ten thousand tons or more, wherein about 40% desulfurized gypsum is stored as waste.It is predicted according to China's ENERGY PLANNING, the year two thousand twenty (hair Electricity is up to 2,000,000,000 tons with coal) discharge desulfurized gypsum be up to 100,000,000 tons or so.Comprehensive utilization industry by-product gypsum not only may be used The exploitation of gypsum mine resources is reduced, and great to the Protection significance of ecological environment.Related scholar analyzes Chinese Self-leveling stone It is pointed out after the market prospects of cream, is that gypsum industry is last using the gravity flow self-leveling floor mortar that the exploitation of desulfurized gypsum waste residue is had excellent performance The grand banquet that will once start a banquet.In addition, preparing the high added value that gravity flow self-leveling floor mortar is power plant desulfurization gypsum with desulfurized gypsum Comprehensive utilization provides new technological approaches, realizes recycling for power plant desulfurization gypsum solid waste, and has saved a large amount of Gypsum mineral resources, energy-saving and emission-reduction remarkable benefit, popularization and application foreground are wide.
One of an important factor for architecture indoor air themperature is as influence living environment comfort level, is always what people studied Emphasis.SiO2Aeroge is a kind of three-dimensional space network structure solid material, have low-density, lower thermal conductivity, high light transmission rate, Characteristics such as high porosity and high-specific surface area, while also having the excellent performances such as fire prevention, waterproof concurrently are a kind of rare light Matter, environmental protection, multifunctional material have broad application prospects in the heat-insulated field of building heat preservation.By SiO2Aeroge is applied to sand Research report in slurry is fewer, and Kim S. et al. is once by SiO2Aerogel powder is added in cement slurry, and SiO is worked as in discovery2Airsetting When the quality at rubber powder end accounts for the 2% of gross mass, thermal coefficient decline 75%.
As temperature, air humidity is also one of the important parameter for influencing indoor environment comfort level.Currently, both at home and abroad A kind of efficiently tune is disclosed about the report of temperature controlling and humidifying material, such as Chinese patent CN101108902A " highly effective humidity conditioning material " Wet stock, with biocatalyst, mesoporous material, super absorbent resin raw material；" a kind of nano-pore is multiple by Chinese patent CN101928438A Close the preparation method of humidity adjusting material " to disclose a kind of by organic polymer, natural polymer, inorganic porous material be prepared by raw material Nano pore composite humidity adjusting material；Chinese patent CN102965998A " a kind of preparation method of tough humidity-controllingmaterial material " discloses one Kind is by sodium carboxymethylcellulose, potassium carbonate, sodium acrylate, the tough humidity-controllingmaterial material that diatomite is raw material preparation.Due to these tune Wet stock is mostly using organic polymer as raw material, and high production cost, moisture adsorption and releasing are poorly reversible, limits pushing away on a large scale for humidity adjusting material Extensively, meanwhile, raw material is divided into using single damping group, the control to temperature is had ignored, has a single function, in use cannot Meet requirement of the user to comfort level, increases the energy consumption of building.Chinese patent application CN102557507A is " a kind of using yellow Soil or the sepiolite method for preparing humidity adjusting material " disclose a kind of humidity adjusting material, using loess and calcium hydroxide as humidity adjusting material or with Sepiolite and calcium hydroxide are humidity adjusting material, and preparation process includes raw material cooperation, molding and the processing of hydrothermal synthesis item.Chinese patent CN102417339A " a kind of gypsum-based composite humidity control material and preparation method thereof " discloses one kind using gypsum as cementitious material, sea Afrodite and polyacrylic acid-acrylamide are the humidity adjusting material of damping component.
It yet there are no and utilize SiO2The gypsum of temperature control and damping is capable of in preparation in aerogel powder incorporation gypsum base material The research of based self-leveling terrace mortar is reported.
Summary of the invention
It is the general introduction to the theme being described in detail herein below.This general introduction is not the protection model in order to limit claim It encloses.
Desulfurized gypsum and SiO are utilized this application provides a kind of2The gypsum based self-leveling mortar of aeroge preparation, the stone Cream base gravity flowing levelling mortar has excellent thermal insulation property and can adjust indoor humidity, and present invention also provides prepare the stone The method of cream base gravity flowing levelling mortar and slurry including the gypsum based self-leveling mortar.
Specifically, this application provides a kind of gypsum based self-leveling mortars.
Hydrophily is contained on kind gypsum based self-leveling mortar provided herein, including aeroge, the aeroge surface Group, and obtained by the modification of hydrophobic aerogels surface.
Using by hydrophobicity SiO2The modified obtained SiO of aeroge2Aeroge is than directlying adopt hydrophily SiO2Aeroge The thermal coefficient of the gypsum based self-leveling mortar of preparation is small.
In some embodiments, the aeroge can be SiO2Aeroge.
In some embodiments, the SiO2Aeroge is by hydrophobicity SiO2Aeroge is obtained through silane coupler modified.
In some embodiments, the hydrophobicity SiO2The weight ratio of aeroge and the silane coupling agent is (0.5- 1):1。
In some embodiments, the SiO can be prepared using following methods2Aeroge: with water that the silane is even Connection agent is configured to silane coupler solution；By the hydrophobicity SiO2Aeroge is added in the silane coupler solution, stirring To the hydrophobicity SiO2Aeroge is completely dissolved in the silane coupler solution.
In some embodiments, the gypsum based self-leveling mortar can also include portland cement, the SiO2Gas The weight ratio of gel and the portland cement is (1-8): (5-15).
In some embodiments, the SiO2The preparation method of aeroge can also include: will be silane coupler modified The SiO obtained afterwards2Aeroge is mixed with the portland cement, ball milling.
In some embodiments, the gypsum based self-leveling mortar can also include desulfurized gypsum.
In some embodiments, the desulfurized gypsum can be selected from one of αsemiwatergypsum and β semi-hydrated gypsum or two Kind.
Optionally, the desulfurized gypsum is made of αsemiwatergypsum and β semi-hydrated gypsum, wherein the αsemiwatergypsum and institute The weight ratio for stating β semi-hydrated gypsum is (30-50): (50-70).
Optionally, the weight ratio of the αsemiwatergypsum and the β semi-hydrated gypsum is (35-45): (55-65).
In one embodiment, by αsemiwatergypsum, β semi-hydrated gypsum, portland cement, SiO2Aeroge and filler into Row compounding, is tested using size distribution situation of the laser fineness gage to powder, the grain composition of powder is adjusted with this, By carrying out consumptive use of water normal consistence, setting time (initial set and final set), Mechanics Performance Testing (compression strength and anti-folding to powder Intensity) further overall merit is carried out to powder particles gradation and is distributed rationally.Present inventor in practice, it has been found that with When desulfurized gypsum prepares desulfurized gypsum base gravity flow self-leveling floor material, the granule size of desulfurized gypsum will affect gravity flow self-leveling floor mortar Grain composition.The partial size of desulfurized gypsum generates certain influence: desulfurization to the performance of desulfurized gypsum base gravity flow self-leveling floor material The granularity of gypsum is too big, can slow down the heat evolution velocity and condensation curing progress of gypsum plaster, and then influences the ground after being laid with Face surface hardness and wearability；The granularity of desulfurized gypsum is too small, and gypsum plaster is not easy to disperse when contacting with water, aquation mistake Journey can reunite, and increase the defect inside gypsum hardenite after aquation, decline gypsum base terrace mortar integral strength.
Therefore, in some embodiments, the desulfurized gypsum can be 80-100 mesh.The granularity of the desulfurized gypsum exists In above range, can obtain workability is excellent, volume stability is good, workability can preferable desulfurized gypsum based self-leveling Terrace material.
In some embodiments, the gypsum based self-leveling mortar can also include retarder, water-reducing agent, latex powder, Stabilizer and filler.
In some embodiments, the desulfurized gypsum relative to 100 parts by weight, the content of the aeroge can be 1-8 Parts by weight, the content of the retarder can be 5-15 parts by weight, and the content of the water-reducing agent can be 0.01-1 parts by weight, institute The content for stating latex powder can be 0-4 parts by weight, and the content of the stabilizer can be 0.02-0.12 parts by weight, the filler Content can be 45-60 parts by weight.
When portland cement grinding together with the modified aeroge in surface is added, since portland cement can also be made For retarder, therefore the dosage of the retarder in gypsum based self-leveling mortar can be suitably reduced, to guarantee gypsum based self-leveling The suitable retarding time of mortar determines the dosage of retarder.Specifically, the desulfurized gypsum relative to 100 parts by weight delays The dosage of solidifying agent can be 5-15 parts by weight.
Optionally, the desulfurized gypsum relative to 100 parts by weight, the content of the aeroge are 2-7 parts by weight, the slow setting The content of agent is 5-15 parts by weight, and the content of the water-reducing agent is 0.05-0.8 parts by weight, and the content of the latex powder is 1-3 weight Part is measured, the content of the stabilizer is 0.05-0.1 parts by weight, and the content of the filler is 45-55 parts by weight.
In some embodiments, the retarder can be compound slow selected from portland cement, citric acid and efficient organic One of solidifying agent or more.
Optionally, the retarder be efficient organic compound retarder, such as TRICOSAL company, Germany produce it is efficient Gypsum base retarder Retardan P or organic retarder, such as the HyCon R 7200F of BASF AG's production.
In some embodiments, the water-reducing agent can be in ethyl-amine resin based water reducer and poly carboxylic acid series water reducer One or more.
Optionally, the water-reducing agent be poly carboxylic acid series water reducer, such as BASF AG production Melflux5691F, 5581F water-reducing agent etc..
In some embodiments, the latex powder can be redispersible latex powder, such as watt gram, Yi Laitai company Production redispersible latex powder.
In some embodiments, the stabilizer can be anionic polymer viscosity-improving agents, such as BASF The anionic polymer viscosity-improving agents Starvis3070F of the production of company.
In some embodiments, the filler can be selected from flyash, quartz sand, nanoscale SiO2Aeroge, silicon ash With one of river sand or more.
Optionally, it is II grade of flyash of 300-450 purpose that the flyash, which is granularity,.
Optionally, the granularity of the quartz sand is 70-90 mesh.
This application provides a kind of functional premixing gravity flowing levelling mortar produced using desulfurized gypsum waste residue, mortar tools Have good fluidity, condensation quickly, that intensity is high, shrinking percentage is small, alkali resistance is good, green and pollution-free, low-temperature resistance is dry etc. is excellent Characteristic opens a new way for the resource utilization of desulfurized gypsum waste residue.
The material of main part of the gypsum based self-leveling mortar of the application is desulfurized gypsum, with traditional gravity flow self-leveling floor material Gypsum-cement mixed system (dosage of cement is larger) is entirely different.
Meanwhile the application joined aeroge in gypsum based self-leveling mortar in a creative way, significantly improve stone The thermal insulation property of cream base gravity flowing levelling mortar improves the comfort level of indoor living environment again while the effectively save energy.Separately Outside, aeroge used by the application has both the effect of filler, improves the grain composition of gypsum based self-leveling mortar, reduces The bulk density of mortar.
When the aeroge is that hydrophilic radical is contained and by the modified obtained airsetting in hydrophobic aerogels surface in surface Glue, especially by hydrophobicity SiO2Aeroge through it is silane coupler modified and together with portland cement grinding is modified obtains SiO2When aeroge, the compatibility between aeroge and the other components of mortar is preferable.While not wishing to be bound by theory, but That present inventor speculates that its reason may be: silane coupling agent can promote inorganic coagulation material (such as desulfurized gypsum) with Interface fusion between aeroge, grinding will increase silane coupling agent and SiO2Hydrophobic group (Si-R, R in airsetting xanthan molecule =CH3Or C2H5Equal groups), in cement the hydrophilic radical of substance contact probability, such silane coupling agent is to SiO2Aeroge with The modified effect at the interface of inorganic coagulation material is improved, therefore grinding can increase substantially SiO2Aeroge and mortar its Compatibility between his component, so that SiO2Aeroge can smoothly be added in mortar, improve SiO2The utilization rate of aeroge.
Present invention also provides a kind of methods for preparing gypsum based self-leveling mortar as described above.
The method for preparing gypsum based self-leveling mortar as described above provided herein, including by retarder airsetting Glue, optional portland cement, water-reducing agent, latex powder, stabilizer, desulfurized gypsum and filler be uniformly mixed to get.
In some embodiments, the method for preparing gypsum based self-leveling mortar as described above may include:
Silane coupling agent is configured to silane coupler solution with water；By hydrophobicity SiO2It is even that the silane is added in aeroge Join in agent solution, stirring to the hydrophobicity SiO2Aeroge is completely dissolved in the silane coupler solution, obtains SiO2Airsetting Sol solution；By the SiO2Airsetting sol solution is mixed with portland cement, ball milling；
By the SiO after the retarder, ball milling2Aeroge and portland cement, water-reducing agent, latex powder, stabilizer, desulfurization Gypsum and filler be uniformly mixed to get.
Present invention also provides a kind of gypsum based self-leveling slurries.
Gypsum based self-leveling slurry provided herein, including gypsum based self-leveling mortar as described above and water, In, the total amount of the water and the water in the gypsum based self-leveling mortar is that the normal consistency of the gypsum based self-leveling mortar is used Water.
Compared with existing gravity flow self-leveling floor mortar, the gypsum based self-leveling mortar of the application or the stone for adding water to prepare by it Cream base Self-leveling slurry has the advantage that
(1) dry contraction or the small gypsum of curing shrinkage rate become calcium sulphate dihydrate from half-H 2 O calcium sulphate in hydration process, Microdilatancy can occur for volume, can make up for it the dry contraction and curing shrinkage of a part；
(2) insulation, sound insulation value are good, are conducive to building energy conservation；
(3) green and pollution-free；
(4) have fine tuning effect to indoor air humidity, good breathable properties: gypsum is a kind of porous containing knot The material of brilliant water, when the humidity in air is too small, it can discharge some constitution waters, when the humidity in air is excessive, in air Moisture can enter gypsum hole in；
(5) there is temperature adjustment function, the fluctuation range of room temperature can be effectively reduced, improve the comfort of living environment.
In addition, the gypsum based self-leveling mortar of the application or by its add water prepare gypsum based self-leveling slurry also have such as Lower additional advantage:
1. the various additives compatibility in gypsum based self-leveling mortar is good, control is easily adjusted；
2. the gypsum based self-leveling mortar of the application is functional gravity flow self-leveling floor mortar, the SiO in the mortar2Airsetting Glue is a kind of porous heat preserving and insulating material, had not only improved the thermal insulation property of mortar but also had reduced the bulk density of mortar, also The harmful substances such as the formaldehyde in air can be adsorbed.
3. desulfurized gypsum waste residue can be effectively treated in the application, the resource utilization of desulfurized gypsum is realized, while again may be used To reduce the production cost of mortar.
4. portland cement rises before mortar is formed when containing portland cement in the formula of gypsum based self-leveling mortar The effect of retarder can replace the organic retarder in part, improve the whole of material after the completion of the slurry prepared by mortar is laid with Body intensity and surface hardness.
Other features and advantage will illustrate in the following description, also, partly become from specification It obtains it is clear that being understood and implementing the application.The purpose of the application and other advantages can be by specifications, right Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical scheme, and constitutes part of specification, with this The embodiment of application is used to explain the technical solution of the application together, does not constitute the limitation to technical scheme.
Fig. 1 is the apparent form figure of the gypsum based self-leveling mortar of the embodiment of the present application 1.
Fig. 2 is the apparent form figure of the gypsum based self-leveling mortar of the application comparative example 1.
Specific embodiment
For the purposes, technical schemes and advantages of the application are more clearly understood, below in conjunction with attached drawing to the application Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application Feature can mutual any combination.
Raw materials and reagents used in following embodiment are unless otherwise instructed ordinary commercial products.
Embodiment 1
Step 1:(1) 2kg silane coupling agent (model KH550, ordinary commercial products) is configured to mass fraction with water it is 10% silane coupler solution；(2) by the hydrophobicity SiO of 2kg2(by ShaoXing,ZheJiang, Nanuo Technology Co., Ltd. mentions aeroge For aperture is about 18nm) it is added in the silane coupler solution prepared, above-mentioned solution is placed in particle blender and is mixed, directly To the hydrophobicity SiO2Aeroge is completely dissolved in silane coupler solution；(3) by above-mentioned resulting SiO2Airsetting sol solution and 14kg portland cement is placed in ball mill ball milling 4min, spare.
Step 2: by the thin river sand of 70-90 purpose of 45kg and desulfurized gypsum (wherein, αsemiwatergypsum 50kg, the β of 100kg Semi-hydrated gypsum 50kg) be placed in blender be uniformly mixed；
Step 3: the powder and the organic retarder of 0.04kg HyCon R 7200F, 0.2kg that step 2 is obtained Melflux5691F water-reducing agent, 2kg redispersible latex powder RE5010N (buying from Yi Laitai company), 0.05kg Starvis3070F stabilizer is sufficiently mixed acquisition premixing flour；
Step 4: by modified SiO made from the resulting premixing flour of step 3 and step 12Aeroge and portland cement It is mixed to prepare gypsum based self-leveling mortar；
Step 5: by the gypsum based self-leveling mortar and appropriate mixing water (mixing water and preparation silane coupler solution The total amount of 18kg water is the consumptive use of water normal consistence of gypsum based self-leveling mortar) mixing, gypsum based self-leveling slurry is made.
Embodiment 2
Step 1:(1) with water by silane coupling agent (model KH550, ordinary commercial products) be configured to mass fraction be 10% Silane coupler solution；(2) by the hydrophobicity SiO of 3kg2Aeroge (by Shanghai excuse take in the fresh material Science and Technology Ltd. provide, Model TSP60SiO2, hydrophobic, particle size is 60-80 mesh, aperture diameter is 20-50 nanometers) and the silane coupled of preparation is added In agent solution, above-mentioned solution is placed in particle blender and is mixed, until the hydrophobicity SiO2Aeroge is completely dissolved in silane In coupling agent solution；(3) by above-mentioned resulting SiO2Airsetting sol solution and 10kg portland cement are placed in ball mill ball milling 4min, It is spare.
Step 2: by the thin river sand of 70-90 purpose of 55kg and desulfurized gypsum (wherein, αsemiwatergypsum 40kg, the β of 100kg Semi-hydrated gypsum 60kg) be placed in blender be uniformly mixed；
Step 3: the powder and the organic retarder of 0.04kg HyCon R 7200F, 0.1kg that step 2 is obtained Melflux5581F water-reducing agent, 1kg redispersible latex powder RE5010N (buying from Yi Laitai company), 0.05kg Starvis3070F stabilizer is sufficiently mixed acquisition premixing flour；
Step 4: by modified SiO made from the resulting premixing flour of step 3 and step 12Aeroge and portland cement It is mixed to prepare gypsum based self-leveling mortar；
Step 5: by the gypsum based self-leveling mortar and appropriate mixing water (mixing water and preparation silane coupler solution The total amount of 18kg water is the consumptive use of water normal consistence of gypsum based self-leveling mortar) mixing, gypsum based self-leveling slurry is made.
Embodiment 3
The present embodiment is different from that of the embodiment 1 only in the following aspects:
SiO2Aeroge is 3kg；Thin river sand is 50kg；Retarder is efficient gypsum base retarder Retardan P, volume For 0.03kg；Latex powder is 3kg, stabilizer 0.07kg.
Comparative example 1
This comparative example is different from that of the embodiment 1 only in the following aspects:
Directly adopt hydrophobicity SiO2Aeroge, without silane coupler modified and grinding.
Fig. 1 is the apparent form figure of the gypsum based self-leveling mortar of the embodiment of the present application 1；Fig. 2 is the application comparative example 1 The apparent form figure of gypsum based self-leveling mortar.Comparison diagram 1-2 can be seen that the hydrophobicity SiO of embodiment 12Aeroge is through silicon Alkane is coupling agent modified with after grinding, and soluble easily in water, the compatibility between the other components in mortar is fine；And comparative example 1 is thin Aqueous SiO2Aeroge is non-modified, and hydrophobic utilizes such hydrophobicity SiO it is obvious that not soluble in water2Aeroge preparation from Levelling mortar can not construct.
Comparative example 2
This comparative example is different from that of the embodiment 1 only in the following aspects:
Do not add aeroge.
Test case
According to professional standard " gypsum based self-leveling mortar " (JC/T1023-2007), above-described embodiment and comparative example are tested The performance of the gypsum based self-leveling mortar of preparation, test result is see table 1.
Table 1
Test item Standard Embodiment 1 Embodiment 2 Embodiment 3 Comparative example 2 Cement-based mortar
Fluidity, mm 145 150 145 151 149 152
Presetting period, h ≥1 1.2 1.5 2 0.8 3.5
Final setting time, h ≤6 5.5 6 5 5 23
Flexural strength for 24 hours, MPa ≥2.5 2.9 2.5 3.5 3.1 -
24 compression strength, MPa ≥6 6.5 6.1 7.1 6.7 -
Over dry flexural strength, MPa ≥7.5 8 7.7 8.5 8.1 8.7
Over dry compression strength, MPa ≥20 25 21 26 26 28
Over dry tensile viscosity, MPa ≥1 1 1 1.2 1.1 0.9
Shrinking percentage % ≤0.05 0.04 0.045 0.039 0.039 0.05
Thermal coefficient w/mK (25 DEG C) 0.05 0.07 0.035 0.11 0.42
Bulk density kg/m3 1154 1217 1005 1430 1874
As it can be seen from table 1 the embodiment of the present application 1-3 adds suitable modified SiO in terrace mortar material2Gas Influence very little after gel to the mechanical property of hardenite, can almost ignore, but thermal coefficient but significantly reduces, heat preservation Effect is obvious.Meanwhile the density of mortar also significantly reduces.
In addition, the gypsum based self-leveling slurry that the embodiment of the present application 1-3 is provided is in heating conduction, over dry tensile viscosity, receipts The aspect of performance such as shrinkage are superior to cement-based self-leveling terrace mortar；Its bulk density is also greatly lowered.
Although embodiment disclosed by the application is as above, the content only for ease of understanding the application and use Embodiment is not limited to the application.Technical staff in any the application fields, is taken off not departing from the application Under the premise of the spirit and scope of dew, any modification and variation, but the application can be carried out in the form and details of implementation Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.

Claims (10)

1. a kind of gypsum based self-leveling mortar, the gypsum based self-leveling mortar includes aeroge, the aeroge surface is contained Hydrophilic radical, and obtained by the modification of hydrophobic aerogels surface.
2. gypsum based self-leveling mortar according to claim 1, wherein the aeroge is SiO2Aeroge.
3. gypsum based self-leveling mortar according to claim 2, wherein the SiO2Aeroge is by hydrophobicity SiO2Airsetting Glue is obtained through silane coupler modified, optionally, the hydrophobicity SiO2The weight ratio of aeroge and the silane coupling agent is (0.5-1):1；
Optionally, the SiO is prepared using following methods2Aeroge: the silane coupling agent is configured to silane coupling agent with water Solution；By the hydrophobicity SiO2Aeroge is added in the silane coupler solution, stirring to the hydrophobicity SiO2Aeroge It is completely dissolved in the silane coupler solution.
4. gypsum based self-leveling mortar according to claim 3, further includes portland cement, the SiO2Aeroge and institute The weight ratio for stating portland cement is (1-8): (5-15)；
Optionally, the SiO2The preparation method of aeroge further include: the SiO obtained after will be silane coupler modified2Aeroge with The portland cement mixing, ball milling.
5. gypsum based self-leveling mortar described in any one of -4 according to claim 1, further includes desulfurized gypsum, the desulfurization stone The granularity of cream is 80-100 mesh；
Optionally, the desulfurized gypsum is selected from one or both of αsemiwatergypsum and β semi-hydrated gypsum；Optionally, the desulfurization Gypsum is made of αsemiwatergypsum and β semi-hydrated gypsum, wherein the weight ratio of the αsemiwatergypsum and the β semi-hydrated gypsum is (30-50): (50-70) is still optionally further (35-45): (55-65).
6. gypsum based self-leveling mortar according to claim 5, further include retarder, water-reducing agent, latex powder, stabilizer and Filler, relative to the desulfurized gypsum of 100 parts by weight, the content of the aeroge is 1-8 parts by weight, and the content of the retarder is 5-15 parts by weight, the content of the water-reducing agent are 0.01-1 parts by weight, and the content of the latex powder is 0-4 parts by weight, described steady The content for determining agent is 0.02-0.12 parts by weight, and the content of the filler is 45-60 parts by weight；
Optionally, the desulfurized gypsum relative to 100 parts by weight, the content of the aeroge are 2-7 parts by weight, the retarder Content is 5-15 parts by weight, and the content of the water-reducing agent is 0.05-0.8 parts by weight, and the content of the latex powder is 1-3 weight Part, the content of the stabilizer is 0.05-0.1 parts by weight, and the content of the filler is 45-55 parts by weight.
7. gypsum based self-leveling mortar according to claim 6, wherein the retarder is selected from portland cement, lemon One of sour, organic retarder and efficient organic compound retarder or more；
Optionally,
The water-reducing agent is selected from one of ethyl-amine resin based water reducer and poly carboxylic acid series water reducer or more；
The latex powder is redispersible latex powder；
The stabilizer is anionic polymer viscosity-improving agents；
The filler is selected from flyash, quartz sand, nanoscale SiO2One of aeroge, silicon ash and river sand or more.
8. a kind of method for preparing gypsum based self-leveling mortar described in any one of -7 according to claim 1, the method packet It includes and mixes retarder, aeroge, optional portland cement, water-reducing agent, latex powder, stabilizer, desulfurized gypsum and filler It is even to get.
9. according to the method described in claim 8, wherein, the aeroge is SiO2Aeroge, which comprises
Silane coupling agent is configured to silane coupler solution with water；By hydrophobicity SiO2The silane coupling agent is added in aeroge In solution, stirring to the hydrophobicity SiO2Aeroge is completely dissolved in the silane coupler solution, obtains SiO2Airsetting peptization Liquid；By the SiO2Airsetting sol solution is mixed with portland cement, ball milling；
By the SiO after the retarder, ball milling2Aeroge and portland cement, water-reducing agent, latex powder, stabilizer, desulfurized gypsum With filler be uniformly mixed to get.
10. a kind of gypsum based self-leveling slurry, the gypsum based self-leveling slurry includes any one of -7 institute according to claim 1 The gypsum based self-leveling mortar and water stated, wherein the total amount of the water and the water in the gypsum based self-leveling mortar is described The consumptive use of water normal consistence of gypsum based self-leveling mortar.
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CN111606669A (en) * 2019-06-06 2020-09-01 中建材创新科技研究院有限公司 Gypsum board and preparation method thereof
CN113061009A (en) * 2021-03-19 2021-07-02 浙江森林人新型材料有限公司 Preparation process and operation flow of gypsum-based self-leveling sound-insulation thermal-insulation mortar
CN113292304A (en) * 2021-06-17 2021-08-24 烟台瑞祥干混砂浆有限公司 Anti-crack gypsum-based self-leveling mortar and preparation process thereof
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CN111606669B (en) * 2019-06-06 2021-12-17 中建材创新科技研究院有限公司 Gypsum board and preparation method thereof
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CN111309061A (en) * 2020-02-25 2020-06-19 北新集团建材股份有限公司 Gypsum slurry consistency adjusting and controlling method and consistency detecting device
CN113061009A (en) * 2021-03-19 2021-07-02 浙江森林人新型材料有限公司 Preparation process and operation flow of gypsum-based self-leveling sound-insulation thermal-insulation mortar
CN113292304A (en) * 2021-06-17 2021-08-24 烟台瑞祥干混砂浆有限公司 Anti-crack gypsum-based self-leveling mortar and preparation process thereof
CN113735543A (en) * 2021-08-26 2021-12-03 苏州弗克技术股份有限公司 Lightweight plastering gypsum mortar and preparation method thereof
CN113896500A (en) * 2021-09-27 2022-01-07 贵州恒源科创资源再生开发有限公司 Preparation method of sand-free paste-based self-leveling slurry
CN113943141B (en) * 2021-11-30 2022-12-06 客诺环保科技(青岛)有限公司 Surface modification enhanced gypsum powder and preparation method and application thereof
CN113943141A (en) * 2021-11-30 2022-01-18 客诺环保科技(青岛)有限公司 Surface-modified reinforced gypsum powder and preparation method and application thereof
CN115974508A (en) * 2022-09-08 2023-04-18 宏源防水科技集团有限公司 Anti-efflorescence stain-resistant waterproof decoration integrated mortar and preparation process thereof
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