CN109354470A - Unitary system thick-layer gravity flowing levelling mortar and preparation method thereof - Google Patents
Unitary system thick-layer gravity flowing levelling mortar and preparation method thereof Download PDFInfo
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- CN109354470A CN109354470A CN201811393332.5A CN201811393332A CN109354470A CN 109354470 A CN109354470 A CN 109354470A CN 201811393332 A CN201811393332 A CN 201811393332A CN 109354470 A CN109354470 A CN 109354470A
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- agent
- mortar
- gravity flowing
- flowing levelling
- unitary system
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Classifications
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
-
- 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
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- 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
Abstract
The invention discloses unitary system thick-layer gravity flowing levelling mortars and preparation method thereof, and using high belite sulphate aluminium cement as cementitious material, shrinkage value is lower, effectively inhibit mortar cracking；Active flour filler is mixed, early hydration heat release is reduced and reduces formulation cost, further reduced the risk shunk and then reduce cracking；By the way that early strength agent and retarder is added, reach early strength development and it is sufficient can the construction time balance；By the way that defoaming agent and air entraining agent is added, so that containing the lesser non-interconnected bubble of suitable partial size in fresh mortar, the suitable application property of fresh mortar is assigned, and help to improve mortar hardening body intensity, impermeability and frost resistance.In addition, unitary system thick-layer gravity flowing levelling mortar provided by the invention, early strength is high, 1 day compression strength is up to 20MPa, and for 28 days compression strength up to 40MPa, single constructs thickness up to 40mm, working procedure is reduced, has saved cost, and thick-layer Self-leveling has preferable fluidity, without sedimentation bleeding.
Description
Technical field
The present invention relates to field of mortar, especially unitary system thick-layer gravity flowing levelling mortar and preparation method thereof.
Background technique
Ground surface finishing construction in, is carried out with gravity flowing levelling mortar it is levelling, when Base Smoothness is poor, it usually needs progress two
Interfacial agents twice and construction gravity flowing levelling mortar twice, time-consuming and laborious and increase cost are brushed in secondary construction.Construction mortar twice
When, it is easy cellular hole occur because of holiday interfacial agents, it will influence subsequent construction.Node between mortar construction twice
Need special attention: one does not have surface drying just to construct second layer mortar for first layer mortar, since interfacial agents enclose two layers of sand
Interface between slurry, the vapor inside first layer mortar can not be discharged by interface, and then influence the strength development of hardenite
And durability；Another is bone dry just construction second layer mortar for first layer mortar, and the water in second layer mortar can be by first layer
Mortar siphons away a part, and so as to cause the cementitious material in second layer mortar due to no enough water to be unable to fully aquation hard
Change.
As the construction thickness of gravity flowing levelling mortar larger (such as 5mm or more), due to otherness (such as material of mortar material composition
Partial size, particle shape and the density of material), in the case where newly mixing state, the mobility of different materials is different, is easy to happen the lamination of material
And bleeding sedimentation is caused even to be cracked, develop in terms of angle from material property, being unevenly distributed for this material will also result in most
Whole gravity flowing levelling mortar different location (such as surface layer, middle layer and bottom) performance (intensity, flexibility) difference, and greatly
Influence final using effect.
Summary of the invention
In view of this, construction is thick the object of the present invention is to provide unitary system thick-layer gravity flowing levelling mortar and preparation method thereof
Degree is 5~40mm, and a construction molding simplifies working procedure.It has the characteristics that mobility, plasticity, fast hard, lower shrinkage,
When mortar construction thickness reaches 40mm not bleeding, do not isolate, and surface effect is good, and economic cost is moderate.
To achieve the goals above, the invention provides the following technical scheme:
Unitary system thick-layer gravity flowing levelling mortar, the raw material including following parts by weight:
Preferably, the rubber powder is rigid redispersable latex powder.
Preferably, the rubber powder is vinyl acetate-ethylene copolymerization rubber powder.
Preferably, the water-reducing agent is poly carboxylic acid series water reducer.
Preferably, the water-retaining agent is hydroxypropyl methyl cellulose ether, viscosity 400-600mPas.
Preferably, the retarder is citric acid and malic acid.
Preferably, the early strength agent is one of calcium formate, calcium chloride or lithium carbonate.
Preferably, the defoaming agent is organic silicon defoamer.
Preferably, the air entraining agent is fatty alcohols air entraining agent.
The present invention also provides a kind of above-mentioned preparation methods of unitary system thick-layer gravity flowing levelling mortar, comprising the following steps:
A) it feeds intake in strict accordance with quartz sand → coarse whiting → additive → rubber powder → high belite sulphate aluminium cement → silicon ash
Sequence feeds intake；Additive includes water-reducing agent, water-retaining agent, retarder, early strength agent, defoaming agent and air entraining agent；
B) 30min is stirred after feeding intake；
C) discharge returning charge after stirring；
D) discharging packaging.
The present invention provides unitary system thick-layer gravity flowing levelling mortars and preparation method thereof, using high belite aluminium sulfate water
For mud as cementitious material, shrinkage value is lower, effectively inhibits mortar cracking；Active flour filler is mixed, reduces early hydration heat release simultaneously
Formulation cost is reduced, further reduced the risk shunk and then reduce cracking；By the way that early strength agent and retarder is added, reach early
Phase strength development and it is sufficient can the construction time balance；By the way that defoaming agent and air entraining agent is added, so that containing in fresh mortar
Suitable lesser non-interconnected bubble of partial size assigns the suitable application property of fresh mortar, and helps to improve mortar hardening body
Intensity, impermeability and frost resistance.In addition, unitary system thick-layer gravity flowing levelling mortar provided by the invention, early strength is high, and 1 day anti-
Compressive Strength is up to 20MPa, and for 28 days compression strength up to 40MPa, single constructs thickness up to 40mm, reduces working procedure, saves
Cost, and thick-layer Self-leveling has preferable fluidity, without sedimentation bleeding.
Specific embodiment
Unitary system thick-layer gravity flowing levelling mortar provided by the invention, the raw material including following parts by weight:
In above-mentioned technical proposal, using high belite sulphate aluminium cement as cementitious material, shrinkage value is lower, effectively presses down
Mortar cracking processed；Active flour filler is mixed, early hydration heat release is reduced and reduces formulation cost, further reduced contraction in turn
Reduce the risk of cracking；By the way that early strength agent and retarder is added, reach early strength development and it is sufficient can the construction time it is flat
Weighing apparatus；By the way that defoaming agent and air entraining agent is added, so that containing the lesser non-interconnected bubble of suitable partial size in fresh mortar, assign new
Sand cutting starches suitable application property, and helps to improve mortar hardening body intensity, impermeability and frost resistance.In addition, the present invention mentions
The unitary system thick-layer gravity flowing levelling mortar of confession, early strength is high, and 1 day compression strength is up to 20MPa, and compression strength is reachable within 28 days
40MPa, single construct thickness up to 40mm, reduce working procedure, have saved cost, and thick-layer Self-leveling has preferable flowing
It spends, without sedimentation bleeding.
Cementitious material of the high belite sulphate aluminium cement as thick-layer gravity flowing levelling mortar, early strength development is very fast, receives
Contracting value is lower, enables to thick-layer gravity flowing levelling mortar volume change small, is less prone to cracking.In an embodiment of the present invention,
The parts by weight of high belite sulphate aluminium cement are 300~500 parts；In the preferred embodiment of the invention, high belite sulphur
The parts by weight of aluminate cement are 300~400 parts.
The present invention, quartz sand mainly play grain composition and filling effect, using 0.45~0.9mm stone as inert filler
Sand, 0.22~0.45mm quartz sand and 0.105~0.22mm quartz sand facilitate closely knit hardenite structure, reduce hole and stir
Mix water consumption.
In an embodiment of the present invention, the parts by weight of 0.45~0.9mm quartz sand are 100~200 parts；It is excellent in the present invention
In the embodiment of choosing, the parts by weight of 0.45~0.9mm quartz sand are 170~180 parts.
In an embodiment of the present invention, the parts by weight of 0.22~0.45mm quartz sand are 100~200 parts；In the present invention
In preferred embodiment, the parts by weight of 0.22~0.45mm quartz sand are 100~120 parts.
In an embodiment of the present invention, the parts by weight of 0.105~0.22mm quartz sand are 100~200 parts；In the present invention
In preferred embodiment, the parts by weight of 0.105~0.22mm quartz sand are 180~200 parts.
In an embodiment of the present invention, the parts by weight of 0.045mm coarse whiting are 70~180 parts；In currently preferred reality
It applies in example, the parts by weight of 0.045mm coarse whiting are 78~165 parts.
In an embodiment of the present invention, the parts by weight of silicon ash are 5~50 parts；In the preferred embodiment of the invention, silicon
The parts by weight of ash are 15~30 parts.
In embodiments of the present invention, rubber powder is rigid redispersable latex powder；In the preferred embodiment of the invention, rubber powder
For vinyl acetate-ethylene copolymerization rubber powder；Above-mentioned rubber powder helps to improve adhesion strength, flexural strength and the cracking resistance of mortar.
In an embodiment of the present invention, the parts by weight of rubber powder are 10~40 parts；In the preferred embodiment of the invention, silicon
The parts by weight of ash are 20~30 parts.
In embodiments of the present invention, water-reducing agent is poly carboxylic acid series water reducer；Above-mentioned water-reducing agent facilitates compared with low water-cement ratio
Under the conditions of assign the preferable initial flow degree of mortar and it is lesser through when fluidity loss.
In an embodiment of the present invention, the parts by weight of water-reducing agent are 1~3 part；In the preferred embodiment of the invention, subtract
The parts by weight of aqua are 1.5~2 parts.
In embodiments of the present invention, water-retaining agent is hydroxypropyl methyl cellulose ether, viscosity 400-600mPas；It is above-mentioned
Water-retaining agent facilitates mortar and obtains enough water retentions to guarantee the abundant hydration and hardening of the cementitious materials such as cement, and facilitates
Reduce a possibility that mortar generates bleeding and isolation.
In an embodiment of the present invention, the parts by weight of water-retaining agent are 0.5~2 part；In the preferred embodiment of the invention,
The parts by weight of water-retaining agent are 1~1.5 part.
In embodiments of the present invention, retarder is citric acid and malic acid；In the preferred embodiment of the invention, citric acid
With mass ratio 1:1~1:2 of malic acid.Above-mentioned retarder maintains preferable effect to Mortar'S Flowability, simultaneously for intensity
The influence of especially later strength is smaller.
In an embodiment of the present invention, the parts by weight of retarder are 0.5~2 part；In the preferred embodiment of the invention,
The parts by weight of retarder are 0.6~1.4 part.
In embodiments of the present invention, early strength agent is one of calcium formate, calcium chloride or lithium carbonate；Above-mentioned early strength agent can
For the higher early strength of gravity flowing levelling mortar.
It should be noted that setting time and early strength can be reached using retarder provided by the invention and early strength agent
Balance.
In an embodiment of the present invention, the parts by weight of early strength agent are 0.5~2 part；In the preferred embodiment of the invention,
The parts by weight of early strength agent are 0.6~1 part.
In embodiments of the present invention, defoaming agent is organic silicon defoamer；Above-mentioned defoaming agent can eliminate thick-layer gravity flowing levelling mortar
Introduced and generation bubble, improves compression strength, improves surface state in stirring and construction.
In an embodiment of the present invention, the parts by weight of defoaming agent are 0.5~1 part；In the preferred embodiment of the invention,
The parts by weight of early strength agent are 0.5~0.8 part.
In embodiments of the present invention, air entraining agent is fatty alcohols air entraining agent；The incorporation of above-mentioned air entraining agent makes mortar mixture
Interior to form the appropriate lesser non-interconnected bubble of partial size, bubble diameter reduces intergranular rub mostly at 200 μm hereinafter, such as ball
Resistance is wiped, lubricating action is played to the construction of thick-layer gravity flowing levelling mortar, improves the workability and mobility of mortar.
In an embodiment of the present invention, the parts by weight of air entraining agent are 0.1~1 part；In the preferred embodiment of the invention,
The parts by weight of air entraining agent are 0.4~0.7 part.
In an embodiment of the present invention, the parts by weight of water are 150~200 parts；In the preferred embodiment of the invention, water
Parts by weight be 170~195 parts.
It should be noted that the present invention is compounded using air entraining agent with defoaming agent, the biggish bubble of partial size is reduced, increases partial size
Lesser non-interconnected bubble.Under the premise of guaranteeing that mortar hardening body compactness is higher, the mobility of wet mortar is improved.Meanwhile
Since uniform moisture is distributed in around a large amount of micro-bubbles, make it possible to free-moving discharge reduction, reduces the possibility of bleeding
Property, so that mortar has suitable water-retaining property.
The present invention also provides a kind of above-mentioned preparation methods of unitary system thick-layer gravity flowing levelling mortar, comprising the following steps:
A) in strict accordance with quartz sand → coarse whiting → → rubber powder → high belite sulphate aluminium cement → silicon ash feeding sequence into
Row feeds intake；Additive includes water-reducing agent, water-retaining agent, retarder, early strength agent, defoaming agent and air entraining agent；
B) 30min is stirred after feeding intake；
C) discharge returning charge after stirring；
D) discharging packaging.
Wherein, high belite sulphate aluminium cement, 0.45~0.9mm quartz sand, 0.22~0.45mm quartz sand, 0.105
~0.22mm quartz sand, 0.045mm coarse whiting, silicon ash, rubber powder, water-reducing agent, water-retaining agent, retarder, early strength agent, defoaming agent, bleed
Agent, water are same as above, and details are not described herein.
The above method is simple, easy to operate, the unitary system thick-layer gravity flowing levelling mortar being prepared, and early strength is high, and 1 day anti-
Compressive Strength is up to 20MPa, and 28 days compression strength is up to 40MPa, and single constructs thickness up to 40mm, and less working procedure is saved
Cost, and, so that thick-layer Self-leveling is there is preferable fluidity and without sedimentation bleeding.
In order to further illustrate the present invention, below with reference to embodiment to unitary system thick-layer Self-leveling sand provided by the invention
Slurry and preparation method thereof is described in detail, but they cannot be interpreted as limiting the scope of the present invention.
In Examples 1 to 3, rubber powder is vinyl acetate-ethylene copolymerization rubber powder, and poly carboxylic acid series water reducer is poly- for DH-4004 type
Carboxylic acid water reducing agent, water-retaining agent are hydroxypropyl methyl cellulose ether, and viscosity 400mPas, organic silicon defoamer is methyl silicon
Oil, fatty alcohols air entraining agent are ethoxylated alkyl sulfate.
Embodiment 1
Unitary system thick-layer gravity flowing levelling mortar, the raw material including following parts by weight:
300 parts of high belite sulphate aluminium cement, 180 parts of 0.45~0.9mm quartz sand, 0.22~0.45mm quartz sand
100 parts, 200 parts of 0.105~0.22mm quartz sand, 165 parts of 0.045mm coarse whiting, 30 parts of silicon ash, 20 parts of rubber powder, polycarboxylic-acid subtract
1.5 parts of aqua, 1 part of water-retaining agent, 0.6 part of retarder, 1 part of lithium carbonate, 0.5 part of organic silicon defoamer, fatty alcohols air entraining agent 0.4
Part；Corresponding clear water additive amount is 170 parts when stirring use；
Wherein, the mass ratio of citric acid and malic acid is 1:1.5 in retarder.
The preparation method of unitary system thick-layer gravity flowing levelling mortar, comprising the following steps:
A) (water-reducing agent, water-retaining agent, retarder, early strength agent, defoaming agent and draw in strict accordance with quartz sand → coarse whiting → additive
Gas agent) → vinyl acetate-ethylene copolymerization rubber powder → high belite sulphate aluminium cement → silicon ash feeding sequence feeds intake；
B) 30min is stirred after feeding intake；
C) discharge returning charge after stirring；
D) discharging packaging.
Unitary system thick-layer gravity flowing levelling mortar made from embodiment 1 is subjected to physical and mechanical property test, the results are shown in Table 1.
The physics characteristic test result of 1 embodiment 1 of table
Embodiment 2
Unitary system thick-layer gravity flowing levelling mortar, the raw material including following parts by weight:
350 parts of high belite sulphate aluminium cement, 180 parts of 0.45~0.9mm quartz sand, 0.22~0.45mm quartz sand
120 parts, 200 parts of 0.105~0.22mm quartz sand, 99 parts of 0.045mm coarse whiting, 20 parts of silicon ash, 25 parts of rubber powder, polycarboxylic-acid diminishing
2 parts of agent, 1.2 parts of water-retaining agent, 1 part of retarder, 0.7 part of lithium carbonate, 0.6 part of organic silicon defoamer, fatty alcohols air entraining agent 0.5
Part；Corresponding clear water additive amount is 185 parts when stirring use；
Wherein, the mass ratio of citric acid and malic acid is 1:2 in retarder.
The preparation method of unitary system thick-layer gravity flowing levelling mortar, comprising the following steps:
A) (water-reducing agent, water-retaining agent, retarder, early strength agent, defoaming agent and draw in strict accordance with quartz sand → coarse whiting → additive
Gas agent) → vinyl acetate-ethylene copolymerization rubber powder → high belite sulphate aluminium cement → silicon ash feeding sequence feeds intake；
B) 30min is stirred after feeding intake；
C) discharge returning charge after stirring；
D) discharging packaging.
Unitary system thick-layer gravity flowing levelling mortar made from embodiment 2 is subjected to physical and mechanical property test, the results are shown in Table 2.
The physics characteristic test result of 2 embodiment 2 of table
Embodiment 3
Unitary system thick-layer gravity flowing levelling mortar, the raw material including following parts by weight:
400 parts of high belite sulphate aluminium cement, 170 parts of 0.45~0.9mm quartz sand, 0.22~0.45mm quartz sand
120 parts, 180 parts of 0.105~0.22mm quartz sand, 78 parts of 0.045mm coarse whiting, 15 parts of silicon ash, 30 parts of rubber powder, polycarboxylic-acid diminishing
2 parts of agent, 1.5 parts of water-retaining agent, 1.4 parts of retarder, 0.6 part of lithium carbonate, 0.8 part of organic silicon defoamer, fatty alcohols air entraining agent 0.7
Part；Corresponding clear water additive amount is 195 parts when stirring use；
Wherein, the mass ratio of citric acid and malic acid is 1:2 in retarder.
The preparation method of unitary system thick-layer gravity flowing levelling mortar, comprising the following steps:
A) (water-reducing agent, water-retaining agent, retarder, early strength agent, defoaming agent and draw in strict accordance with quartz sand → coarse whiting → additive
Gas agent) → vinyl acetate-ethylene copolymerization rubber powder → high belite sulphate aluminium cement → silicon ash feeding sequence feeds intake；
B) 30min is stirred after feeding intake；
C) discharge returning charge after stirring；
D) discharging packaging.
Unitary system thick-layer gravity flowing levelling mortar made from embodiment 3 is subjected to physical and mechanical property test, the results are shown in Table 3.
The physics characteristic test result of 3 embodiment 3 of table
Above description can be realized professional and technical personnel in the field or using this to stating in the disclosed embodiments
It is bright, it enables those skilled in the art to implement or use the present invention.Various modifications to these embodiments are to this field
It will be apparent for professional technician, the general principles defined herein can not depart from spirit of the invention
Or in the case where range, realize in other embodiments.Therefore, the present invention is not intended to be limited to these implementations shown in this article
Example, and it is to fit to the widest scope consistent with principles disclosed herein and novel features.
Claims (10)
1. unitary system thick-layer gravity flowing levelling mortar, which is characterized in that the raw material including following parts by weight:
2. unitary system thick-layer gravity flowing levelling mortar as described in claim 1, which is characterized in that the rubber powder is that rigidity can divide again
Dissipate latex powder.
3. unitary system thick-layer gravity flowing levelling mortar as claimed in claim 2, which is characterized in that the rubber powder is vinyl acetate-
Ethylene copolymer rubber powder.
4. unitary system thick-layer gravity flowing levelling mortar as described in claim 1, which is characterized in that the water-reducing agent is polycarboxylic-acid
Water-reducing agent.
5. unitary system thick-layer gravity flowing levelling mortar as described in claim 1, which is characterized in that the water-retaining agent is hydroxypropyl first
Base cellulose ether, viscosity 400-600mPas.
6. unitary system thick-layer gravity flowing levelling mortar as described in claim 1, which is characterized in that the retarder be citric acid and
Malic acid.
7. unitary system thick-layer gravity flowing levelling mortar as described in claim 1, which is characterized in that the early strength agent be calcium formate,
One of calcium chloride or lithium carbonate.
8. unitary system thick-layer gravity flowing levelling mortar as described in claim 1, which is characterized in that the defoaming agent disappears for organosilicon
Infusion.
9. unitary system thick-layer gravity flowing levelling mortar as described in claim 1, which is characterized in that the air entraining agent is rouge
Fat alcohols air entraining agent.
10. a kind of preparation method of the unitary system thick-layer gravity flowing levelling mortar as described in any one of claim 1~9, feature exist
In, comprising the following steps:
A) in strict accordance with quartz sand → coarse whiting → additive → rubber powder → high belite sulphate aluminium cement → silicon ash feeding sequence
It feeds intake；Additive includes water-reducing agent, water-retaining agent, retarder, early strength agent, defoaming agent and air entraining agent；
B) 30min is stirred after feeding intake；
C) discharge returning charge after stirring；
D) discharging packaging.
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| CN113443866A (en) * | 2021-08-30 | 2021-09-28 | 新沂市宝丽蓝建材有限公司 | Cement mortar with controllable curing time and preparation method thereof |
| CN114195448A (en) * | 2021-12-07 | 2022-03-18 | 华南理工大学 | Self-leveling mortar and preparation method thereof |
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| CN109836106A (en) * | 2019-03-06 | 2019-06-04 | 唐山北极熊建材有限公司 | Fast hard cracking resistance cement-based self-leveling mortar powder, slurry, mortar and preparation method |
| CN113443866A (en) * | 2021-08-30 | 2021-09-28 | 新沂市宝丽蓝建材有限公司 | Cement mortar with controllable curing time and preparation method thereof |
| CN114195448A (en) * | 2021-12-07 | 2022-03-18 | 华南理工大学 | Self-leveling mortar and preparation method thereof |
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