CN111087217A - Ternary system cement-based self-leveling mortar - Google Patents
Ternary system cement-based self-leveling mortar Download PDFInfo
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- CN111087217A CN111087217A CN201911381841.0A CN201911381841A CN111087217A CN 111087217 A CN111087217 A CN 111087217A CN 201911381841 A CN201911381841 A CN 201911381841A CN 111087217 A CN111087217 A CN 111087217A
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- cement
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- leveling mortar
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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
- C04B2111/60—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
- C04B2201/10—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
- C04B2201/50—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)
- 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 ternary system cement-based self-leveling mortar, which comprises high-alumina cement, ordinary silica cement, α -semi-hydrated gypsum, coarse whiting, river sand, a water reducing agent, polysaccharide modified nano silicate, a retarder, a defoaming agent, a coagulation accelerator and rubber powder.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to ternary system cement-based self-leveling mortar.
Background
The cement-based self-leveling mortar consists of cement-based cementing material, fine aggregate, filler, additive and the like, and is a ground material which has fluidity after being stirred with water (or emulsion) or can flow and level by being paved with a little assistance. The cement-based self-leveling mortar has the advantages of good leveling property, high early strength, good wear resistance, easiness in laying, simplicity and convenience in construction, high construction speed, short construction period, thin leveling layer thickness, dual functions of bearing and decoration and the like, and is widely applied to floor engineering of various open spaces and offices such as newly-built or reconstructed industrial plants, workshops, commercial stores, exhibition halls, gymnasiums, hospitals, warehouses, basements, parking lots and the like. As a material of a ground surface layer, the smoothness of the surface is an important factor considered by customers, and the smoothness and flatness of the surface are very important.
Ternary system self-leveling is the mainstream material for the current surface layer self-leveling. Because certain adaptability problem exists among the cementing materials of different systems, the surface of the self-leveling hydrated and dried material is often rough and difficult to achieve smoothness, and the popularization of the self-leveling hydrated and dried material in the market is limited.
Disclosure of Invention
Aiming at the defects of the prior art, the invention solves the technical problem of rough self-leveling surface of the ternary system taking high-alumina cement as a main cementing material, and effectively improves the surface smoothness and rheological property of the ternary system self-leveling by adding the polysaccharide modified nano silicate in the self-leveling, so that the self-leveling can obtain excellent self-healing property and flatness.
In order to achieve the above object, the present invention provides a ternary system cement-based self-leveling mortar comprising:
10-22 parts of high-alumina cement, 4-11 parts of ordinary cement, 6-9 parts of α -semi-hydrated gypsum, 18-24 parts of heavy calcium, 40-50 parts of river sand, 0.4-1.7 parts of water reducing agent, 0.4-1.7 parts of polysaccharide modified nano silicate, 0.4-2.2 parts of retarder, 0.4-2.2 parts of defoaming agent, 0.1-1.2 parts of coagulant and 1.2-3.5 parts of rubber powder.
Preferably, the ternary system cement-based self-leveling mortar comprises:
12-20 parts of high-alumina cement, 5-10 parts of ordinary cement, 7-8 parts of α -semi-hydrated gypsum, 20-22 parts of heavy calcium carbonate, 43-46.5 parts of river sand, 0.5-1.5 parts of water reducing agent, 0.5-1.5 parts of polysaccharide modified nano silicate, 0.5-2 parts of retarder, 0.5-2 parts of defoaming agent, 0.2-1 part of coagulant and 1.5-3 parts of rubber powder.
Preferably, the particle size of the coarse whiting is 240-320 meshes.
Preferably, the river sand has a particle size of 40-140 meshes.
According to the invention, the high-alumina cement, the ordinary cement, the α -hemihydrate gypsum, the heavy calcium and the river sand can be obtained commercially, for example, the high-alumina cement can be selected from high-alumina cement TCC of Kanuosi aluminate technology company, the ordinary cement can be selected from ordinary cement PO 42.5 of Huarun cement Gengtian company, α -hemihydrate gypsum can be selected from α -hemihydrate gypsum produced by Zaozhuanghao Wenyuan plaster company, the heavy calcium can be selected from 280 meshes of heavy calcium produced by Guangfu building materials (banana ridge) refinement company, and the river sand can be selected from 40-140 meshes of river sand produced by Jingrun novel factory in Fengrun district of Tangshan city.
Preferably, the water reducing agent is a polycarboxylate water reducing agent, such as Rainbow CR-P818.
According to the invention, the excellent thixotropy of the polysaccharide modified nano silicate can improve the self-healing property and the leveling property of self-leveling, so that the self-leveling surface is more delicate; and the colloid dispersibility and the suspension property can improve the suspension stability of self-leveling and improve the flatness of the self-leveling surface. The polysaccharide modified nano silicate can be selected from commercially available polysaccharide modified nano silicate, and is preferably polysaccharide modified nano silicate RS-20 produced by Guangzhou Jianpau building materials Co.
Preferably, the retarder is tartaric acid, such as tartaric acid manufactured by Qingdao Chenguang chemical Co.
According to the present invention, the defoaming agent can be selected from defoaming agents conventionally used by those skilled in the art, such as at least one defoaming agent selected from mineral oil, alcohols, fatty acids and fatty acid esters, amides, phosphates, silicones, polyethers, and polyether-modified silicones. Such as the P841 antifoaming agent manufactured by Beijing Longhu science and technology Co.
Preferably, the coagulant is at least one of lithium carbonate and lithium sulfate. More preferably lithium sulfate, such as lithium sulfate manufactured by Beijing Hirtema technologies, Inc.
According to the invention, the rubber powder can be rubber powder conventionally adopted by a person skilled in the art, such as rubber powder 5010N produced by Wacker chemical China limited.
According to the invention, the preparation method of the ternary system cement-based self-leveling mortar is a method conventionally adopted by technical personnel in the field, and is referred to JC/T985-2017 cement-based self-leveling mortar for the ground, wherein the polysaccharide modified nano silicate is premixed with other powder materials in advance.
The invention has the beneficial effects that:
in the invention, the colloid formed by the polysaccharide modified nano silicate after meeting water has extremely high shear thinning characteristic, and has excellent hydrophilicity, colloid dispersibility, suspension property, thickening property and thixotropy. The excellent thixotropy of the polysaccharide modified nano silicate can improve the self-healing property and the leveling property of self-leveling, so that the self-leveling surface is more exquisite; and the colloid dispersibility and the suspension property can improve the suspension stability of self-leveling and improve the flatness of the self-leveling surface.
According to the invention, the polysaccharide modified nano silicate is added into the ternary system cement-based self-leveling mortar made of the high-alumina cement cementing material, so that the surface smoothness and rheological property of self-leveling are effectively improved, and the self-leveling can obtain excellent self-healing property and flatness.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the embodiment of the invention, the preparation method of the ternary system cement-based self-leveling mortar refers to JC/T985-2017 cement-based self-leveling mortar for the ground, wherein the polysaccharide modified nano silicate is premixed with other powder materials in advance.
In the embodiment of the invention, the high-alumina cement is high-alumina cement TCC produced by Kannos (China) aluminate technology company, the ordinary cement is ordinary cement PO 42.5 produced by Huarun cement control Limited company, α -hemihydrate gypsum is α -hemihydrate gypsum produced by Zaozhuang Hai aran gypsum powder Limited company, the bicarbonate is 280 meshes of bicarbonate produced by Guangfu building materials (Banglan) refinement Limited company, the river sand is 40-140 meshes of river sand produced by Beijing Longhu novel building material factory in Fengrun district of Tangshan City, the polycarboxylate water reducer is Rainbow CR-P818, the polysaccharide modified nano silicate is polysaccharide modified nano silicate RS-20 produced by Guangzhou paint Bao building materials Limited company, the retarder is tartaric acid produced by Cheng light chemical Limited company, the defoaming agent is P841 defoaming agent produced by Beijing Longhu lake Limited company, the lithium sulfate produced by Beijing Hime Hitachi Tec technology corporation is selected, and the rubber powder produced by Wakko chemical industry Limited company is 5010N.
Example 1
The embodiment provides ternary system cement-based self-leveling mortar, which consists of the following components in parts by weight:
12 parts of high-alumina cement, 10 parts of ordinary cement, 8 parts of semi-hydrated gypsum, 22 parts of triple superphosphate, 46 parts of river sand, 0.5 part of polycarboxylic acid water reducing agent, 1 part of polysaccharide modified nano silicate, 0.5 part of retarder, 1.5 parts of defoaming agent, 0.2 part of coagulant and 3 parts of rubber powder.
Example 2
The embodiment provides ternary system cement-based self-leveling mortar, which consists of the following components in parts by weight:
17 parts of high-alumina cement, 8 parts of ordinary cement, 7 parts of semi-hydrated gypsum, 20 parts of triple superphosphate, 46.5 parts of river sand, 1 part of polycarboxylic acid water reducing agent, 0.5 part of polysaccharide modified nano silicate, 0.5 part of retarder, 1.5 parts of defoaming agent, 0.4 part of coagulant and 1.5 parts of rubber powder.
Example 3
The embodiment provides ternary system cement-based self-leveling mortar, which consists of the following components in parts by weight:
20 parts of high-alumina cement, 5 parts of ordinary cement, 8 parts of semi-hydrated gypsum, 22 parts of triple superphosphate, 43 parts of river sand, 1.5 parts of polycarboxylic acid water reducing agent, 1.5 parts of polysaccharide modified nano silicate, 2 parts of retarder, 1.5 parts of defoaming agent, 1 part of coagulant and 2 parts of rubber powder.
The performances of the cement-based self-leveling mortar of the ternary system in the examples 1-3, specific test indexes and experimental references JC/T985-2017 cement-based self-leveling mortar for ground use are determined, and the measured specific performances are shown in Table 1:
TABLE 1
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (8)
1. The ternary system cement-based self-leveling mortar is characterized by comprising the following components in parts by weight:
10-22 parts of high-alumina cement, 4-11 parts of ordinary cement, 6-9 parts of α -semi-hydrated gypsum, 18-24 parts of heavy calcium, 40-50 parts of river sand, 0.4-1.7 parts of water reducing agent, 0.4-1.7 parts of polysaccharide modified nano silicate, 0.4-2.2 parts of retarder, 0.4-2.2 parts of defoaming agent, 0.1-1.2 parts of coagulant and 1.2-3.5 parts of rubber powder.
2. The ternary system cementitious self-leveling mortar of claim 1, wherein the ternary system cementitious self-leveling mortar comprises:
12-20 parts of high-alumina cement, 5-10 parts of ordinary cement, 7-8 parts of α -semi-hydrated gypsum, 20-22 parts of heavy calcium carbonate, 43-46.5 parts of river sand, 0.5-1.5 parts of water reducing agent, 0.5-1.5 parts of polysaccharide modified nano silicate, 0.5-2 parts of retarder, 0.5-2 parts of defoaming agent, 0.2-1 part of coagulant and 1.5-3 parts of rubber powder.
3. The ternary system cement-based self-leveling mortar according to claim 1 or 2, wherein the particle size of the heavy calcium carbonate is 240-320 mesh.
4. The ternary system cement-based self-leveling mortar according to claim 1 or 2, wherein the river sand has a particle size of 40 to 140 mesh.
5. The ternary system cement-based self-leveling mortar of claim 1 or 2, wherein the water reducer is a polycarboxylic acid water reducer.
6. The ternary system cement-based self-leveling mortar of claim 1 or 2, wherein the retarder is tartaric acid.
7. The ternary system cement-based self-leveling mortar according to claim 1 or 2, wherein the defoamer is selected from at least one of mineral oil, alcohols, fatty acids and fatty acid esters, amides, phosphates, silicones, polyethers and polyether-modified polysiloxane-based defoamers.
8. The ternary system cement-based self-leveling mortar according to claim 1 or 2, wherein the setting accelerator is at least one of lithium carbonate and lithium sulfate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911381841.0A CN111087217A (en) | 2019-12-27 | 2019-12-27 | Ternary system cement-based self-leveling mortar |
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| CN201911381841.0A CN111087217A (en) | 2019-12-27 | 2019-12-27 | Ternary system cement-based self-leveling mortar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113372076A (en) * | 2021-07-16 | 2021-09-10 | 浙江帝耐美环保科技有限公司 | High-adhesion high-strength modified ground cement-based self-leveling mortar and preparation method thereof |
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2019
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| CN106699072A (en) * | 2015-11-12 | 2017-05-24 | 上海东大化学有限公司 | Cement-based self-leveling mortar and preparation method thereof |
| CN108706937A (en) * | 2018-06-15 | 2018-10-26 | 武汉理工大学 | A kind of sulphoaluminate cement base gravity flowing levelling mortar and preparation method thereof |
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Application publication date: 20200501 |