CN114685114A - Heat-preservation gypsum self-leveling mortar - Google Patents
Heat-preservation gypsum self-leveling mortar Download PDFInfo
- Publication number
- CN114685114A CN114685114A CN202011631666.9A CN202011631666A CN114685114A CN 114685114 A CN114685114 A CN 114685114A CN 202011631666 A CN202011631666 A CN 202011631666A CN 114685114 A CN114685114 A CN 114685114A
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- China
- Prior art keywords
- gypsum
- heat
- leveling mortar
- self
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010440 gypsum Substances 0.000 title claims abstract description 51
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 51
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 45
- 238000004321 preservation Methods 0.000 title claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 3
- 239000004575 stone Substances 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 27
- 239000010451 perlite Substances 0.000 claims description 17
- 235000019362 perlite Nutrition 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 4
- 229920003086 cellulose ether Polymers 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 102000004169 proteins and genes Human genes 0.000 claims description 3
- 108090000623 proteins and genes Proteins 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- 229920000877 Melamine resin Polymers 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- DCNHVBSAFCNMBK-UHFFFAOYSA-N naphthalene-1-sulfonic acid;hydrate Chemical compound O.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 DCNHVBSAFCNMBK-UHFFFAOYSA-N 0.000 claims description 2
- -1 polysiloxane Polymers 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000011426 gypsum mortar Substances 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 22
- 238000010276 construction Methods 0.000 description 13
- 239000002344 surface layer Substances 0.000 description 10
- 238000009413 insulation Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 239000011325 microbead Substances 0.000 description 4
- 239000004005 microsphere Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—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
- C04B28/04—Portland 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
- C04B2111/60—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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses heat-preservation gypsum self-leveling mortar. The heat-preservation gypsum self-leveling mortar comprises gypsum, cement, lightweight aggregate, a water-retaining agent, a water reducing agent, a retarder, a defoaming agent, stone powder and sand. The heat-insulating gypsum self-leveling mortar solves the problems of too fast water loss and too fast fluidity loss in the existing heat-insulating gypsum mortar, has the light weight and heat-insulating property of the heat-insulating gypsum mortar and the slow fluidity loss of the self-leveling mortar, has uniform and stable strength, and can be widely applied to leveling the indoor ground of a building.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to heat-preservation gypsum self-leveling mortar.
Background
Along with the annual increase of construction labor cost, the traditional ground leveling cement mortar is gradually replaced by gypsum self-leveling mortar due to the defects of complex construction process, low construction efficiency, easy hollowing, easy cracking and large shrinkage.
The heat-insulating gypsum self-leveling mortar has the advantages of good heat-insulating effect, high construction efficiency, low unit area consumption, capability of further reducing the construction cost and the like, and gradually receives wide attention of people.
However, it has been difficult to prepare self-leveling gypsum mortar from heat-insulating gypsum mortar. The heat-insulating gypsum mortar is largely made of light materials such as expanded perlite, vitrified micro-beads, light ceramsite and the like. However, it is known that light materials such as expanded perlite, vitrified micro-beads and light ceramsite have porous structures, have high water absorption and are easy to float on the surface layer of mortar. A large amount of light materials are doped into the heat-preservation gypsum self-leveling mortar, so that on one hand, the internal water loss is too fast during the material construction, the construction difficulty is increased, and the construction efficiency is reduced; on the other hand, the light material is easy to float to the surface layer of the self-leveling mortar, so that the strength difference between the upper layer and the lower layer of the self-leveling mortar is large, the bonding tensile strength of the surface layer is low, the national standard requirements of building materials cannot be met, and the hidden danger is caused to subsequent construction.
Disclosure of Invention
The invention provides heat-insulating gypsum self-leveling mortar, which solves the problems of too fast water loss and too fast fluidity loss in the existing heat-insulating gypsum mortar, has the light weight and heat-insulating property of the heat-insulating gypsum mortar and the slow fluidity loss of the self-leveling mortar, has uniform and stable strength, and can be widely applied to leveling the indoor floor of a building.
The heat-preservation gypsum self-leveling mortar has the characteristics of small fluidity loss in 30min, low heat conductivity coefficient and uniform and stable strength, and completely solves the problems of high fluidity loss caused by doping of light materials and self-leveling mortar layering caused by uneven dispersion of the light materials.
The raw materials of the heat-preservation gypsum self-leveling mortar comprise gypsum (alpha gypsum powder and beta gypsum powder), cement, lightweight aggregate (vitrified micro-beads and perlite), a water-retaining agent, a water reducing agent, a retarder and a defoaming agent; the composition comprises the following components in parts by weight:
the gypsum consists of alpha gypsum and/or beta gypsum.
The cement is Portland cement, aluminate cement or sulphoaluminate cement.
The lightweight aggregate is composed of vitrified micro bubbles and/or perlite.
The particle size of the vitrified micro bubbles is less than 1mm, and the volume weight is more than 180 kg/cubic meter.
The particle size of the perlite particles is less than 1mm, and the volume weight is more than 180 kg/cubic meter.
The water-retaining agent is cellulose and cellulose ether water-retaining agent; the water-retaining agent can also improve the construction performance while providing the water retention performance.
The water reducing agent is polycarboxylic acid, melamine, powder polycarboxylic ester, lignosulfonate and naphthalenesulfonate water reducing agent; the water reducing agent ensures the requirement of construction fluidity, reduces water consumption and increases strength.
The retarder is a protein retarder; the set retarder regulates setting time.
The defoaming agent is grease, polyether, higher alcohol, silicon, polyether modified silicon and polysiloxane defoaming agent; the defoamer reduces slurry internal and surface porosity, increasing strength and surface smoothness.
The gypsum self-leveling mortar also contains hard filler, wherein the hard filler accounts for 0-50 parts by mass, and the filler consists of stone powder and/or sand.
The heat-preservation gypsum self-leveling mortar has the following advantages:
(1) the floating force of the vitrified micro bubbles and the perlite interacts with the bonding and stretching force of the slurry by controlling the fineness and the volume weight of the vitrified micro bubbles and the perlite, so that the light aggregate is uniformly and stably dispersed in the self-leveling slurry;
(2) the fineness and the using amount of the vitrified micro-beads and the perlite are optimized, the later-stage water absorption rate of the lightweight aggregate is controlled, so that the gypsum self-leveling mortar has the light heat-insulating effect, the setting time is moderate during the construction of the gypsum self-leveling mortar by controlling the using amounts of the retarder and the cement, the loss of the fluidity of the product for 30min can be smaller than 3mm, the national standard requirements are met, the ground leveling of the product is easier, and the construction is more convenient.
Detailed Description
In the following examples and comparative examples, the water-retaining agent is a cellulose ether water-retaining agent, and the water-reducing agent is a polycarboxylic acid water-reducing agent; the retarder is a protein retarder; the defoaming agent is polyether defoaming agent and silicon defoaming agent; are all commercially available.
Example one
The heat-insulating gypsum self-leveling mortar preferably comprises the following raw materials in percentage by weight:
the particle size of the vitrified micro bubbles is less than 1mm, and the volume weight is 250 kg/cubic meter;
the cement is 42.5 common portland cement of conch;
the water-retaining agent is a Jiangsu Xingbang 400PFV cellulose ether water-retaining agent;
the water reducing agent is a Subot 300P polycarboxylic acid water reducing agent;
the retarder is a Longhu PE retarder;
the defoaming agent is Longhu P841 defoaming agent; the same applies below.
The above-mentioned preferred embodiments of the present invention are tested for the following properties:
example two
The heat-insulating gypsum self-leveling mortar preferably comprises the following raw materials in percentage by weight:
the particle size of the perlite particles is less than 1mm, and the volume weight is 290 kg/cubic meter;
the above-mentioned preferred embodiments of the present invention are tested for the following properties:
EXAMPLE III
The heat-insulating gypsum self-leveling mortar preferably comprises the following raw materials in percentage by weight:
the particle size of the vitrified micro bubbles is less than 1mm, and the volume weight is 350 kg/cubic meter;
the above-mentioned preferred embodiments of the present invention are tested for the following properties:
comparative example 1
The comparative example of the thermal insulation gypsum self-leveling mortar comprises the following raw materials in percentage by weight:
the cement is 42.5 common portland cement of conch;
the particle size of the vitrified micro bubbles is less than 1mm, and the volume weight is 250 kg/cubic meter;
the comparative examples of the present invention described above were tested for the following properties:
when the cement consumption is 0, the final setting time of the thermal insulation gypsum self-leveling mortar is 31h, which is far higher than the standard requirement and is less than or equal to 6 h.
Comparative example 2
The comparative example of the thermal insulation gypsum self-leveling mortar comprises the following raw materials in percentage by weight:
the particle size of the vitrified micro bubbles is less than 1mm, and the volume weight is 250 kg/cubic meter;
the comparative examples of the present invention described above were tested for the following properties:
when the cement amount is 6 parts, the fluidity loss of the thermal insulation gypsum self-leveling mortar is 7mm after 30min, which is higher than the standard requirement of being less than or equal to 3 mm.
Comparative example three
The comparative example of the thermal insulation gypsum self-leveling mortar comprises the following raw materials in percentage by weight:
the particle size of the vitrified micro bubbles is more than 1mm and less than 2mm, and the volume weight is 250 kg/cubic meter;
the comparative examples of the present invention described above were tested for the following properties:
when the particle size of the vitrified microsphere particles is more than 1mm and less than 2mm, the forming surface of the heat-preservation gypsum self-leveling mortar has a layering phenomenon, the surface layer has more vitrified microsphere particles, and is uneven, the surface layer has low strength, the tensile bonding strength is 0.8MPa and is more than or equal to 1MPa lower than the standard requirement.
Comparative example four
The comparative example of the thermal insulation gypsum self-leveling mortar comprises the following raw materials in percentage by weight:
the particle size of the perlite particles is more than 1mm and less than 1.5mm, and the volume weight is 270 kg/cubic meter;
the comparative examples of the present invention described above were tested for the following properties:
the particle size of the perlite particles is more than 1mm and less than 1.5mm, the heat-preservation gypsum self-leveling mortar molding surface has a layering phenomenon, the surface layer has more perlite particles, the surface layer is uneven, the surface layer strength is low, the tensile bonding strength is 0.9MPa and is less than or equal to 1MPa of the standard requirement.
Comparative example five
The comparative example of the thermal insulation gypsum self-leveling mortar comprises the following raw materials in percentage by weight:
the particle size of the vitrified microsphere particles is less than 1mm, and the volume weight is 160 kilograms per cubic meter;
the comparative examples of the present invention described above were tested for the following properties:
when the volume weight of the vitrified micro bubbles is 160 kilograms per cubic meter, the forming surface of the heat-preservation gypsum self-leveling mortar has a layering phenomenon, the surface layer has more vitrified micro bubble particles, the surface layer has low strength, the tensile bonding strength is 0.85MPa, and the tensile bonding strength is less than or equal to 1MPa which is lower than the standard requirement; the fluidity loss at 30min is 4mm, which is higher than the standard requirement of less than or equal to 3 mm.
Comparative example six
The comparative example of the thermal insulation gypsum self-leveling mortar comprises the following raw materials in percentage by weight:
the particle size of the perlite particles is less than 1mm, and the volume weight is 290 kg/cubic meter;
the comparative examples of the present invention described above were tested for the following properties:
when the using amount of the perlite is 11 parts, the loss of the fluidity of the heat-preservation gypsum self-leveling mortar is 5mm after 30min, which is higher than the standard requirement that the fluidity is less than or equal to 3 mm; the tensile bonding strength is 0.7MPa, which is lower than the standard requirement and is more than or equal to 1 MPa.
Comparative example seven
The comparative example of the thermal insulation gypsum self-leveling mortar comprises the following raw materials in percentage by weight:
the particle size of the vitrified micro bubbles is less than 1mm, and the volume weight is 350 kg/cubic meter;
the comparative examples of the present invention described above were tested for the following properties:
when the using amount of the vitrified micro bubbles is 8 parts and the using amount of the perlite is 7 parts, the loss of the fluidity of the heat-preservation gypsum self-leveling mortar is 12mm within 30min, which is higher than the standard requirement that the fluidity is less than or equal to 3 mm; the tensile bonding strength is 0.6MPa, which is lower than the standard requirement and is more than or equal to 1 MPa.
Claims (6)
1. The heat-preservation gypsum self-leveling mortar is characterized by comprising the following raw materials of gypsum, cement, lightweight aggregate, a water-retaining agent, a water reducing agent, a retarder and a defoaming agent; the composition comprises the following components in parts by weight:
30-100 parts of gypsum,
1-5 parts of cement, namely,
1-20 parts of light aggregate,
0.01 to 0.5 portion of water retention agent,
0.01 to 0.4 part of water reducing agent,
0.001-0.1 part of retarder,
0.01 to 0.5 part of defoaming agent,
the gypsum consists of alpha gypsum and/or beta gypsum;
the cement is Portland cement, aluminate cement or sulphoaluminate cement;
the lightweight aggregate is composed of vitrified micro bubbles and/or perlite;
the particle size of the vitrified micro bubbles is less than 1mm, and the volume weight is more than 180 kg/cubic meter;
the particle size of the perlite particles is less than 1mm, and the volume weight is more than 180 kg/cubic meter.
2. The heat-insulating gypsum self-leveling mortar of claim 1, wherein the water-retaining agent is cellulose or cellulose ether water-retaining agent.
3. The heat-insulating gypsum self-leveling mortar according to claim 1, wherein the water reducing agent is a polycarboxylic acid, melamine, powdered polycarboxylic acid ester, lignosulfonate, or naphthalenesulfonate water reducing agent.
4. The heat-insulating gypsum self-leveling mortar according to claim 1, wherein the retarder is a protein retarder.
5. The heat-insulating gypsum self-leveling mortar according to claim 1, wherein the defoaming agent is grease, polyether, higher alcohol, silicon, polyether-modified silicon, or polysiloxane defoaming agent.
6. The heat-insulating gypsum self-leveling mortar according to claim 1, further comprising a hard filler, wherein the hard filler accounts for 0-50 parts by mass, and the filler is composed of stone powder and/or sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011631666.9A CN114685114A (en) | 2020-12-31 | 2020-12-31 | Heat-preservation gypsum self-leveling mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011631666.9A CN114685114A (en) | 2020-12-31 | 2020-12-31 | Heat-preservation gypsum self-leveling mortar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114685114A true CN114685114A (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011631666.9A Pending CN114685114A (en) | 2020-12-31 | 2020-12-31 | Heat-preservation gypsum self-leveling mortar |
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| Country | Link |
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| CN (1) | CN114685114A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115368095A (en) * | 2022-08-16 | 2022-11-22 | 安徽倍兆业建材科技有限公司 | Light heat-preservation sound-insulation self-leveling mortar system and construction method thereof |
| CN115504756A (en) * | 2022-10-25 | 2022-12-23 | 娄城环保(苏州)有限公司 | Special gypsum leveling mortar for floors |
-
2020
- 2020-12-31 CN CN202011631666.9A patent/CN114685114A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115368095A (en) * | 2022-08-16 | 2022-11-22 | 安徽倍兆业建材科技有限公司 | Light heat-preservation sound-insulation self-leveling mortar system and construction method thereof |
| CN115504756A (en) * | 2022-10-25 | 2022-12-23 | 娄城环保(苏州)有限公司 | Special gypsum leveling mortar for floors |
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