CN111574171A - Waterproof self-leveling mortar for surface layer and preparation method thereof - Google Patents
Waterproof self-leveling mortar for surface layer and preparation method thereof Download PDFInfo
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- CN111574171A CN111574171A CN202010275695.XA CN202010275695A CN111574171A CN 111574171 A CN111574171 A CN 111574171A CN 202010275695 A CN202010275695 A CN 202010275695A CN 111574171 A CN111574171 A CN 111574171A
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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
- C04B28/14—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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
-
- 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 a waterproof self-leveling mortar for a surface layer, which comprises the following components in parts by mass: 20-25 parts of white cement, 12-18 parts of high-alumina cement, 3-5 parts of gypsum, 9-12 parts of triple superphosphate, 40-45 parts of quartz sand, 0.1-0.4 part of water reducing agent, 3.5-4.5 parts of rubber powder, 0.03-0.06 part of water-retaining thickener, 0.3-0.5 part of defoamer, 0.09-1.2 parts of retarder, 0.03-0.05 part of early strength admixture and 1-1.5 parts of waterproof stabilizer; the waterproof stabilizer is composed of an organic silicon water repellent, a penetrating crystallization agent and polyurethane powder. The invention also discloses a preparation method of the surface waterproof self-leveling mortar. The surface layer waterproof self-leveling mortar has good fluidity, construction performance, wear resistance and waterproofness, and the strength is guaranteed, so that the surface layer waterproof self-leveling mortar can be applied to leveling of ground surfaces such as decoration, a ground warehouse and the like.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a waterproof self-leveling mortar for a surface layer and a preparation method thereof.
Background
As early as the middle of the 20 th century, cement-based self-leveling mortar is widely used in many countries in europe and the united states, and the annual output of the cement-based self-leveling mortar in europe nowadays exceeds 600 million tons. Although the mortar industry in the last decade of China develops rapidly, the early self-leveling mortar has high cost, is mainly used for bedding layers, is easy to generate the problems of cracks, dusting, water resistance and the like, and is limited in use. With the development of modern society, people have higher and higher requirements on living environment. The cement-based surface layer self-leveling is adopted in large hotels, supermarkets, parking lots, passenger rest halls, exhibition centers and the like.
As the common surface layer on the market is free from water resistance due to self-leveling, a series of problems of cracking, sand running, dusting, falling off, difficult cleaning of surface stains and the like gradually occur.
Chinese patent publication No. CN104788072A (published 2015, 7-month, 22) discloses an early strength aluminate cement-based self-leveling material which has the characteristics of good fluidity, high surface flatness, good stability, fast setting and hardening speed, high early strength, small volume shrinkage and the like, and can be used as a ground leveling material and a grouting and repairing material. But the cement-based self-leveling material does not have the characteristics of impermeability and waterproofness.
A chinese patent publication No. CN107010909A (published as 2017, 8, and 4) discloses a self-leveling type ii polymer cement waterproof mortar, which solves the durability problem of the long-term poor waterproof and anti-permeability performance of the common self-leveling mortar due to the high content of the high alumina cement components, realizes the self-leveling construction of the polymer cement waterproof mortar, and can be applied to various building waterproof projects. However, the cement waterproof mortar mainly uses portland cement to increase the waterproofness, and is difficult to meet the higher waterproof and impervious requirements.
Disclosure of Invention
The invention aims to provide a waterproof self-leveling mortar for a surface layer, which has good fluidity, workability, wear resistance and waterproofness, ensures strength and can be applied to leveling of ground surfaces such as decoration, ground depots and the like.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, the invention provides a surface layer waterproof self-leveling mortar, which comprises the following components in parts by mass:
the waterproof stabilizer is composed of an organic silicon water repellent, a penetrating crystallization agent and polyurethane powder.
The permeable crystallization agent is an inorganic rigid waterproof material, which can generate water-insoluble crystals through a series of chemical reactions with alkali substances in the cement-based material in a humid environment, and the crystals are filled in cracks and gaps in the cement-based material to improve the compactness of the material, thereby playing the role of impermeability and water resistance; and even under the action of water for a long time, special active substances in the osmotic crystallization agent can still undergo chemical reaction to generate new crystals, so that the osmotic crystallization agent can be self-repaired and can play a good role in resisting seepage and water. The polyurethane powder has good water resistance and can also play a role in water resistance. According to the invention, after the mixture of the organosilicon water repellent, the osmotic crystallization agent and the polyurethane powder is mixed with the cement-based self-leveling agent, a synergistic effect can be generated, and a particularly excellent waterproof effect is achieved.
Furthermore, in the waterproof stabilizer, the weight ratio of the organic silicon water repellent, the penetrating crystallization agent and the polyurethane powder is (0.2-0.4): (0.4-0.7): (0.3-0.5).
Further, the organosilicon water repellent is a redispersible silane-based water repellent.
Further, the white cement is 32.5 grade white cement.
Further, the high-alumina cement is CA70 aluminate cement.
Further, the gypsum is alpha hemihydrate gypsum or beta hemihydrate gypsum, preferably beta hemihydrate gypsum.
Further, the coarse whiting is 200 meshes coarse whiting, and the whiteness is preferably 95.
Further, the quartz sand is obtained by mixing 40-70-mesh particles and 70-140-mesh particles, and the mass ratio of the 40-70-mesh particles to the 70-140-mesh particles is 3: 1.
Further, the water reducing agent is polycarboxylate water reducing agent powder.
Further, the defoaming agent is a silicone defoaming agent.
In the invention, the rubber powder can play roles in bonding, fracture resistance and strength improvement. Further, the rubber powder is EVA dispersible latex powder.
According to the invention, the water-retaining thickener can increase the compactness of the cement-based material, and is beneficial to improving the impermeability. Preferably, the water retention thickener is hydroxypropyl methyl cellulose ether, and more preferably 400 viscosity hydroxypropyl methyl cellulose ether.
Further, the retarder is L+Tartaric acid.
Further, the early strength agent is lithium sulfate.
The second aspect of the invention provides a preparation method of the surface layer waterproof self-leveling mortar, which comprises the following steps:
weighing the components according to the proportion, and fully mixing the components until the components are uniform to obtain the waterproof self-leveling mortar for the surface layer.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the surface layer waterproof self-leveling mortar, the mixture of the organic silicon water repellent, the penetrating crystallization agent and the polyurethane powder is used as the waterproof stabilizer, and after the waterproof stabilizer and the cement-based self-leveling mortar are mixed together, a synergistic effect can be generated, and a particularly excellent waterproof effect is achieved.
2. The surface waterproof self-leveling mortar has good fluidity, workability, wear resistance and waterproofness, and the strength is guaranteed; can be applied to ground leveling in decoration, ground depots and the like.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified. Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
In the following examples, the white cement is 32.5-grade white cement, the high alumina cement is CA70 aluminate cement, the triple superphosphate is 200-mesh triple superphosphate with the whiteness of 95, the quartz sand is obtained by mixing 40-70-mesh quartz particles and 70-140-mesh quartz particles in a mass ratio of 3: 1, and the penetrating crystallization agent is FLW-CCCW penetrating crystallization agent master batch.
Example 1
22 parts of white cement, 15 parts of high-alumina cement, 4 parts of β semi-hydrated gypsum, 10 parts of heavy calcium, 43 parts of quartz sand, 0.3 part of polycarboxylic acid water reducing agent powder, 4 parts of EVA dispersible latex powder, 0.05 part of 400-viscosity hydroxypropyl methyl cellulose ether, 0.5 part of organic silicon defoaming agent, 0.1 part of L+Tartaric acid, 0.05 part of lithium sulfate and 1 part of a waterproof agent stabilizer are added into a gravity-free mixer and fully and uniformly mixed to obtain the surface waterproof self-leveling mortar. Wherein the mass ratio of the redispersible silane-based water repellent, the penetrating crystallization agent and the polyurethane powder in the waterproof stabilizer is 1: 2: 1.5.
example 2
21 parts of white cement, 17 parts of high-alumina cement, 3 parts of β semi-hydrated gypsum, 8.6 parts of heavy calcium, 44 parts of quartz sand, 0.31 part of polycarboxylic acid water reducing agent powder, 4 parts of EVA dispersible latex powder and 0.06 part of 400-viscosity hydroxypropyl methylCellulose ether, 0.4 part of organic silicon defoamer, 0.09 part of L+Tartaric acid, 0.04 part of lithium sulfate and 1.5 parts of a waterproof agent stabilizer are added into a gravity-free mixer and are fully and uniformly mixed, and the surface waterproof self-leveling mortar is obtained. Wherein the mass ratio of the redispersible silane-based water repellent, the penetrating crystallization agent and the polyurethane powder in the waterproof stabilizer is 4: 6: 5.
comparative example 1
21 parts of white cement, 17 parts of high-alumina cement, 3 parts of β semi-hydrated gypsum, 8.6 parts of heavy calcium, 44 parts of quartz sand, 0.31 part of polycarboxylic acid water reducing agent powder, 4 parts of EVA dispersible latex powder, 0.06 part of 400 viscosity hydroxypropyl methyl cellulose ether, 0.4 part of organic silicon defoaming agent, 0.09 part of L+Tartaric acid, 0.04 part of lithium sulfate and 1.5 parts of a waterproof agent stabilizer are added into a gravity-free mixer and are fully and uniformly mixed, and the surface waterproof self-leveling mortar is obtained. Wherein the mass ratio of the redispersible silane-based water repellent, the penetrating crystallization agent and the polyurethane powder in the waterproof stabilizer is 4:0: 5.
Comparative example 2
24.5 parts of white cement, 12 parts of high-alumina cement, 5 parts of β semi-hydrated gypsum, 11 parts of heavy calcium, 41 parts of quartz sand, 0.36 part of polycarboxylic acid water reducing agent powder, 4.5 parts of EVA dispersible latex powder, 0.05 part of 400-viscosity hydroxypropyl methyl cellulose ether, 0.35 part of organic silicon defoamer, 0.1 part of L+Tartaric acid, 0.04 part of lithium sulfate and 1.1 part of a waterproof agent stabilizer are added into a gravity-free mixer and are fully and uniformly mixed, and the surface waterproof self-leveling mortar is obtained. Wherein the mass ratio of the redispersible silane-based water repellent, the penetrating crystallization agent and the polyurethane powder in the waterproof stabilizer is 3: 2: 0.
comparative example 3
24.5 parts of white cement, 12 parts of high-alumina cement, 5 parts of β semi-hydrated gypsum, 11 parts of heavy calcium, 41 parts of quartz sand, 0.36 part of polycarboxylic acid water reducing agent powder, 4.5 parts of EVA dispersible latex powder, 0.05 part of 400-viscosity hydroxypropyl methyl cellulose ether, 0.35 part of organic silicon defoamer, 0.1 part of L+Tartaric acid, 0.04 part of lithium sulfate and 1.1 part of a waterproof agent stabilizer are added into a gravity-free mixer and are fully and uniformly mixed, and the surface waterproof self-leveling mortar is obtained. Wherein the waterproof stabilizer may beThe mass ratio of the redispersed silane-based water repellent to the penetrating crystallization agent to the polyurethane powder is 0: 3: 2.
comparative example 4
The common surface layer in the market is self-leveling.
The surface waterproof self-leveling mortar of each example and the comparative example is taken, and performance detection is carried out by referring to JGJ/T70-2009 Standard test method for basic Performance of building mortar, JC/T985-2017 Cement-based self-leveling mortar for ground and JC/T2090-2011 Polymer Cement waterproof slurry, and the obtained results are shown in the following table:
according to the results of the examples 1-2 and the comparative example 4, the waterproof self-leveling mortar for the surface layer has the advantages that the initial fluidity can reach about 150mm, the 20min loss is small (basically negligible), and compared with the comparative example 4 (ordinary surface layer self-leveling on the market), the mortar has obvious advantages in fluidity and workability, so that the construction efficiency and quality on site are greatly improved. In addition, the waterproof self-leveling mortar for the surface layer has the strength of about 50MPa in 28 days, the flexural strength of 9.0MPa and the shrinkage rate of 0.02 percent in 28 days, which are basically negligible, and the indexes are superior to the indexes of the self-leveling of the common surface layer in the market.
According to the results of examples 1-2 and comparative examples 1-3, the surface waterproof self-leveling mortar of the present invention has a 28-day seepage pressure of 0.6MPa, and can be kept watertight at 0.3MPa for 30min, which meets the II-level seepage resistance standard in the "Polymer waterproof slurry" standard, and is significantly superior to the surface waterproof self-leveling mortar of comparative examples 1-3. The waterproof self-leveling mortar for the surface layer in the embodiment 1-2 contains three materials of a water repellent and a penetrating crystallization agent in the waterproof stabilizing agent, and the three waterproof materials are mixed to achieve the synergistic effect and the best anti-permeability and waterproof effect.
Therefore, the waterproof self-leveling surface layer has good fluidity, construction performance, impermeability and water resistance, and the strength is guaranteed.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The waterproof self-leveling mortar for the surface layer is characterized by comprising the following components in parts by mass:
the waterproof stabilizer is composed of an organic silicon water repellent, a penetrating crystallization agent and polyurethane powder.
2. The face layer waterproof self-leveling mortar of claim 1, wherein the weight ratio of the organosilicon water repellent, the penetrating agent, and the polyurethane powder in the waterproof stabilizer is (0.2-0.4): (0.4-0.7): (0.3-0.5).
3. The capstock waterproof self-leveling mortar of claim 1, wherein the silicone hydrophober is a redispersible silane based hydrophober.
4. The finish waterproof self-leveling mortar of claim 1, wherein the white cement is 32.5 grade white cement and the high alumina cement is CA70 aluminate cement.
5. The face layer waterproof self-leveling mortar of claim 1, wherein the gypsum is beta hemihydrate gypsum and the heavy calcium is 200 mesh heavy calcium.
6. The surface waterproof self-leveling mortar of claim 1, wherein the quartz sand is obtained by mixing 40-70 mesh quartz particles and 70-140 mesh quartz particles, and the mass ratio of the 40-70 mesh quartz particles to the 70-140 mesh quartz particles is 3: 1.
7. The surface course waterproof self-leveling mortar of claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent powder, and the defoamer is an organosilicon defoamer.
8. The face layer waterproof self-leveling mortar of claim 1, wherein the rubber powder is EVA dispersible latex powder and the water retention thickener is hydroxypropyl methyl cellulose ether.
9. The face layer waterproof self-leveling mortar of claim 1, wherein the retarder is L+Tartaric acid, wherein the early strength agent is lithium sulfate.
10. A method for preparing the surface layer waterproof self-leveling mortar of any one of claims 1 to 9, which is characterized by comprising the following steps:
weighing the components according to the proportion, and fully mixing the components until the components are uniform to obtain the waterproof self-leveling mortar for the surface layer.
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Cited By (3)
| 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 |
| CN114195448A (en) * | 2021-12-07 | 2022-03-18 | 华南理工大学 | Self-leveling mortar and preparation method thereof |
| CN115093191A (en) * | 2021-12-31 | 2022-09-23 | 苏州弗克技术股份有限公司 | Surface layer art color self-leveling mortar and preparation method thereof |
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| JP2000302519A (en) * | 1999-04-20 | 2000-10-31 | Ube Ind Ltd | Self-fluidity hydraulic composition |
| CN104788072A (en) * | 2015-03-18 | 2015-07-22 | 南京工业大学 | Early-strength type aluminate cement based self-leveling material |
| CN107010909A (en) * | 2017-05-24 | 2017-08-04 | 山东英才学院 | A kind of Self-leveling II type Polymer cement materials |
| CN110746166A (en) * | 2019-11-21 | 2020-02-04 | 广西横县恒丰建材有限责任公司 | Self-crystallized anti-permeability and moisture-proof mortar and production method thereof |
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2020
- 2020-04-09 CN CN202010275695.XA patent/CN111574171A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000302519A (en) * | 1999-04-20 | 2000-10-31 | Ube Ind Ltd | Self-fluidity hydraulic composition |
| CN104788072A (en) * | 2015-03-18 | 2015-07-22 | 南京工业大学 | Early-strength type aluminate cement based self-leveling material |
| CN107010909A (en) * | 2017-05-24 | 2017-08-04 | 山东英才学院 | A kind of Self-leveling II type Polymer cement materials |
| CN110746166A (en) * | 2019-11-21 | 2020-02-04 | 广西横县恒丰建材有限责任公司 | Self-crystallized anti-permeability and moisture-proof mortar and production method thereof |
Cited By (3)
| 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 |
| CN114195448A (en) * | 2021-12-07 | 2022-03-18 | 华南理工大学 | Self-leveling mortar and preparation method thereof |
| CN115093191A (en) * | 2021-12-31 | 2022-09-23 | 苏州弗克技术股份有限公司 | Surface layer art color self-leveling mortar and preparation method thereof |
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