CN113716918B - Single-component waterproof mortar composition, single-component waterproof mortar, and preparation method and application thereof - Google Patents
Single-component waterproof mortar composition, single-component waterproof mortar, and preparation method and application thereof Download PDFInfo
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- CN113716918B CN113716918B CN202111051637.XA CN202111051637A CN113716918B CN 113716918 B CN113716918 B CN 113716918B CN 202111051637 A CN202111051637 A CN 202111051637A CN 113716918 B CN113716918 B CN 113716918B
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- asphalt
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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
- C04B28/04—Portland cements
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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
- 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
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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
- 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 relates to the field of chemical building materials, in particular to a single-component waterproof mortar composition, single-component waterproof mortar, a preparation method and application thereof, wherein the mortar composition contains the following components which are respectively independently stored or are mixed and stored: cement, asphalt powder, redispersible latex powder, cellulose ether, starch ether, an auxiliary agent and a filler. The single-component waterproof mortar prepared from the single-component waterproof mortar composition provided by the invention has higher impermeability, flexural strength, compressive strength and flexibility.
Description
Technical Field
The invention relates to the field of chemical building materials, in particular to a single-component waterproof mortar composition, single-component waterproof mortar, and a preparation method and application thereof.
Background
The main bodies of buildings such as houses, basements, municipal works and the like are mostly concrete structures. During the solidification process of concrete, capillary holes and shrinkage joints are easy to occur, so that wall cracks are generated, and the problem that the foundation is easy to settle due to the self gravity of a building in the later period is solved.
Under the conditions that the impermeability of the waterproof material is poor, the flexibility is insufficient, the strength does not reach the standard or the waterproof engineering in the early stage is not perfect, the leakage of the building and the failure of the waterproof layer can be caused.
After the phenomenon occurs, before the waterproof layer is laid again, the old waterproof coating needs to be turned over again and removed completely, and after the leveling layer is cleaned and the laitance floating ash is removed, the waterproof layer can be laid again, so that the labor cost is high, the efficiency is low, and energy and materials are wasted.
CN105669133A discloses a waterproof mortar with inorganic mineral as main filler, which comprises the following raw materials in percentage by weight: 15 to 45 percent of Portland cement; 1-10% of attapulgite or modified attapulgite; 1 to 7 percent of active aluminum salt; 0 to 3 percent of bentonite; 40 to 70 percent of graded sand; 0.3 to 1 percent of thickening humectant; 0.1 to 1 percent of early enhancer; 0 to 1.5 percent of retarder; 0 to 10 percent of active activator. The waterproof mortar prepared by the prior art only depends on the water-retaining agent to help the inorganic cementing material to hydrate, and the early strength agent graded material and the retarder are added to improve the construction time, so that the waterproof performance is general, and the bonding strength and the impermeability are low.
Therefore, in order to solve the above-mentioned problems of the prior art, it is necessary to develop a waterproof mortar having better performance.
Disclosure of Invention
The invention aims to overcome the defects of lower impermeability, lower breaking and compression strength and poorer flexibility of the existing waterproof mortar.
The asphalt powder contains certain water-soluble and oil-soluble components, is used as a high polymer, has a molecular structure containing-C-C-bonds and-C-S-bonds, has stronger bond energy, can help cement hydration reaction to quickly generate tricalcium silicate and dicalcium silicate, further generates more hydrated calcium silicate (C-S-H gel) through hydration reaction, and reduces the generation of a byproduct calcium hydroxide of the hydration reaction; and the water-insoluble part of the asphalt powder can play the roles of filling capillary pores and plugging, so that the compactness of the waterproof mortar can be obviously improved, and the seepage pressure resistance, the breaking strength, the compressive strength and the bonding force to a base layer of the waterproof mortar are greatly improved. The inventor of the invention finds out in research that the dosage ratio is 1: 0.3-0.7 of sulfonated asphalt powder, petroleum asphalt powder and the like, and when the sulfonated asphalt powder, the petroleum asphalt powder and the like are mixed and then are matched with cement, redispersible latex powder and other components in a quantitative proportion, the obtained single-component waterproof mortar has higher impermeability, flexural strength, compressive strength and flexibility.
In order to achieve the above object, a first aspect of the present invention provides a one-pack waterproof mortar composition, which contains the following components stored independently or in a mixture of two or more of them: cement, asphalt powder, redispersible latex powder, cellulose ether, starch ether, an auxiliary agent and a filler;
relative to 100 parts by weight of cement, the asphalt powder is 10-20 parts by weight, the redispersible latex powder is 12-30 parts by weight, the cellulose ether is 0.1-1 part by weight, the starch ether is 0.5-1 part by weight, the assistant is 12.8-38 parts by weight, and the filler is 2-10 parts by weight;
the asphalt powder comprises the following components in percentage by weight of 1: 0.3-0.7 of sulfonated asphalt powder and a component A, wherein the component A is at least one selected from petroleum asphalt powder, natural rock asphalt and high-temperature asphalt powder.
In a second aspect, the present invention provides a method for preparing a one-component waterproof mortar, the method comprising: mixing the components of the mortar composition of the first aspect, wherein the mixing conditions at least satisfy: the time is 10-20 min.
In a third aspect, the present invention provides a one-component waterproof mortar prepared by the method of the second aspect.
The fourth aspect of the present invention provides the use of the one-component waterproofing mortar of the third aspect in waterproofing buildings.
Compared with the existing waterproof mortar technology, the single-component waterproof mortar provided by the invention has at least the following advantages:
the single-component waterproof mortar provided by the invention has higher impermeability, flexural strength, compressive strength and flexibility, the impermeability pressure reaches more than 1.5Mpa, and a coating film is waterproof under the conditions of 0.3Mpa and 120min, so that the single-component waterproof mortar can be applied to the waterproof and moistureproof of basement, the waterproofing of building roof and outer wall, the waterproofing of underground garage, the waterproofing of water tank and water tower and the like, has lasting waterproofing effect, can adapt to the telescopic deformation of building structure, and resists the deformation and sinking of building to a certain degree; meanwhile, the material is environment-friendly, non-toxic and convenient to construct.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
It should be noted that, in various aspects of the present invention, the present invention is described only once in one aspect thereof without repeated description with respect to the same components in the aspects, and those skilled in the art should not be construed as limiting the present invention.
As described above, the first aspect of the present invention provides a one-component waterproof mortar composition, which contains the following components stored independently or in a mixture of two or more of them: cement, asphalt powder, redispersible latex powder, cellulose ether, starch ether, an auxiliary agent and a filler;
relative to 100 parts by weight of cement, the asphalt powder is 10-20 parts by weight, the redispersible latex powder is 12-30 parts by weight, the cellulose ether is 0.1-1 part by weight, the starch ether is 0.5-1 part by weight, the assistant is 12.8-38 parts by weight, and the filler is 2-10 parts by weight;
the asphalt powder comprises the following components in percentage by weight of 1: 0.3-0.7 of sulfonated asphalt powder and a component A, wherein the component A is at least one selected from petroleum asphalt powder, natural rock asphalt and high-temperature asphalt powder.
In the invention, the petroleum asphalt powder is an asphalt product prepared by drying and crushing petroleum asphalt obtained in the crude oil processing process. The natural rock asphalt is formed by long-term evaporation and solidification of petroleum in mountain and rock cracks, which emerge from the earth crust, and the rock asphalt is generated in the rock cracks and is subjected to higher pressure and temperature than other natural asphalt, so that the polymerization degree of the rock asphalt is higher. The high-temperature asphalt powder is asphalt prepared by distilling coal tar obtained by coal dry distillation, and has the characteristics of high content of fixed carbon, toluene insoluble substances and resin, low ash content and the like.
Preferably, the sulfonated asphalt powder has a softening point of > 150 ℃, an ash content of < 5 wt%, and an average particle size of 200-500 mesh. In this preferred embodiment, the inventors have found that the resulting one-component waterproof mortar has higher impermeability, flexural and compressive strength, and flexibility.
Preferably, the cement is selected from at least one of PC32.5 cement, PII42.5 portland cement, P.O42.5R ordinary portland cement, and low-alkalinity sulphoaluminate cement with strength grade of 42.5. The inventors have found that, in this preferred embodiment, the resulting one-component waterproof mortar has better properties, higher impermeability and higher flexural and compressive strength.
Preferably, the redispersible latex powder is selected from at least one of vinyl acetate and ethylene copolymer rubber powder, ethylene and vinyl chloride and vinyl acetate ternary copolymer rubber powder, vinyl acetate and ethylene and higher fatty acid vinyl ester ternary copolymer rubber powder, vinyl acetate and higher fatty acid vinyl ester copolymer rubber powder, vinyl acetate and acrylate and higher fatty acid vinyl ester ternary copolymer rubber powder, acrylate and styrene copolymer rubber powder, acrylic acid homopolymerization rubber powder and butadiene and styrene copolymer rubber powder.
Preferably, the viscosity of the cellulose ether is 20000-75000 mPa.S.
The present invention does not particularly require a specific kind of the starch ether, and may be exemplified by a modified starch ether having a model number of FP6 manufactured by Everebel Co., Ltd.
Preferably, the auxiliary agent is selected from at least one of graded sand, a water reducing agent and a defoaming agent.
Preferably, the graded sand is selected from at least one of graded quartz sand with the average particle size of 100-220 μm. The inventors have found that in this preferred embodiment, a good gradation improves the pore structure of the repair coating, increases the compactness of the mortar, and contributes to an increase in the strength of the waterproof coating.
Preferably, the water reducing agent is at least one selected from a polycarboxylate water reducing agent and a melamine water reducing agent. The invention has no special requirement on the specific type of the water reducing agent, and can be used as a basf water reducing agent F10 or a Cika 325C water reducing agent.
Preferably, the defoamer is a powder defoamer. The invention does not require a particular type of defoamer, and illustratively can be a gelatin chemical P803 defoamer.
According to a preferred embodiment, the auxiliary agents are graded sand, water reducing agents and defoamers.
Preferably, the content of the graded sand is 12-36 parts by weight, the content of the water reducing agent is 0.4-1 part by weight, and the content of the defoaming agent is 0.4-1 part by weight, relative to 100 parts by weight of the cement.
Preferably, the filler is selected from at least one of metakaolin, fumed silica, silica fume and silica fume.
As previously mentioned, a second aspect of the invention provides a method for preparing a one-component waterproofing mortar, the method comprising: mixing the components of the mortar composition of the first aspect, wherein the mixing conditions at least satisfy: the time is 10-20 min.
In the present invention, the mixing may be performed in a dispersion tank and/or a dry mortar mixer.
As mentioned above, the third aspect of the present invention provides the one-component waterproof mortar prepared by the method of the second aspect.
As mentioned above, the fourth aspect of the present invention provides the use of the one-component waterproofing mortar of the aforementioned third aspect for waterproofing buildings.
When in use, the single-component waterproof mortar and water are uniformly mixed to carry out waterproof construction. The mixing operation may be performed using a blender.
Preferably, the weight ratio of the single-component waterproof mortar to water is 1: 0.2-0.25.
The present invention will be described in detail below by way of examples.
In the following examples, unless otherwise specified, the laboratory instruments and raw materials are commercially available.
Raw materials
Cement: PC32.5 cement, Anhui conch Cement Ltd;
cement: PII42.5 Portland Cement, Anhui conch Cement Ltd;
cement: p.o42.5r ordinary portland cement, anshui cement gmbh;
sulfonated asphalt powder I: softening point 160 + -10 deg.C, FT-1, Hongfei chemical company;
sulfonated asphalt powder II: softening point of 120 + -10 deg.C, T120, Chengli chemical industry, Limited liability company;
petroleum asphalt powder: chuandong mineral processing plants company;
natural rock asphalt: daca technologies, ltd;
high-temperature asphalt powder: dalian charm sea rock bitumen technologies GmbH;
redispersible latex powder I: vinyl acetate and ethylene copolymer powder, FL2211, ex letai;
redispersible latex powder II: acrylate and styrene copolymer powder, FX7000, yilaitai corporation;
redispersible latex powder III: ethylene/vinyl laurate/vinyl chloride terpolymer gum powder, 8031H, wacker;
cellulose ether: HD340, Shandong Heda;
starch ether: modified starch ethers, FP6, elvitein ltd, the netherlands;
grading sand: grading quartz sand with an average particle size of 150-;
water reducing agent: water reducing agent F10, basf;
water reducing agent: water reducing agent 325C, cika;
defoaming agent: powder antifoam P803, Mingling, Germany.
The amounts of the components of the following examples are expressed in parts by weight. Unless otherwise specified, the mass per weight part is 1 g.
In the following examples, the performance test methods involved are as follows:
1. testing of flexural and compressive strength and other properties
The properties such as flexural strength and compressive strength are tested according to the standard of JC/T984-2011.
Example 1
This example illustrates the preparation of a one-component water-proofing mortar from the one-component water-proofing mortar composition according to the formulation and process parameters of Table 1, as described below.
The method for preparing the single-component waterproof mortar comprises the following steps:
placing cement, asphalt powder, redispersible latex powder, cellulose ether, starch ether, graded sand, a water reducing agent, a defoaming agent and a filler into a dispersion kettle, and uniformly stirring and mixing to obtain the single-component waterproof mortar S1.
The remaining examples were carried out, without specific mention, using the same procedure as in example 1, except that the formulation and the process parameters of the one-component waterproofing mortar composition used were different, see in particular table 1.
TABLE 1
The single-component waterproof mortar obtained in each example was subjected to the performance measurement using the aforementioned test method, and the specific results are shown in table 2.
TABLE 2
Table 2 (continuation watch)
From the results, the single-component waterproof mortar prepared from the single-component waterproof mortar composition provided by the invention has higher impermeability, flexural and compressive strength and flexibility, the seepage pressure resistance reaches more than 1.5Mpa, and the excellent performance of the single-component waterproof mortar can completely meet the requirements of JC/T984-2011 Standard of Polymer Cement waterproof mortar.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. The single-component waterproof mortar composition is characterized by comprising the following components which are stored independently or in a mixed manner: cement, asphalt powder, redispersible latex powder, cellulose ether, starch ether, an auxiliary agent and a filler;
relative to 100 parts by weight of cement, the asphalt powder is 10-20 parts by weight, the redispersible latex powder is 12-30 parts by weight, the cellulose ether is 0.1-1 part by weight, the starch ether is 0.5-1 part by weight, the assistant is 12.8-38 parts by weight, and the filler is 2-10 parts by weight;
the asphalt powder comprises the following components in percentage by weight of 1: 0.3-0.7 of sulfonated asphalt powder and a component A, wherein the component A is at least one selected from petroleum asphalt powder, natural rock asphalt and high-temperature asphalt powder;
the auxiliary agent is selected from at least one of graded sand, a water reducing agent and a defoaming agent.
2. The mortar composition according to claim 1, wherein the sulfonated asphalt powder has a softening point of > 150 ℃, an ash content of < 5 wt%, and an average particle size of 200-500 mesh.
3. The mortar composition according to claim 1 or 2, wherein the cement is selected from at least one of PC32.5 cement, PII42.5 portland cement, p.o42.5r ordinary portland cement, low basicity sulphoaluminate cement having a strength grade of 42.5.
4. The mortar composition of claim 1 or 2, wherein the redispersible latex powder is at least one selected from the group consisting of vinyl acetate-ethylene copolymer rubber powder, ethylene-vinyl chloride-vinyl acetate terpolymer rubber powder, vinyl acetate-ethylene-higher fatty acid vinyl ester terpolymer rubber powder, vinyl acetate-higher fatty acid vinyl ester copolymer rubber powder, vinyl acetate-acrylate-higher fatty acid vinyl ester terpolymer rubber powder, acrylate-styrene copolymer rubber powder, acrylic acid homopolymer rubber powder, butadiene-styrene copolymer rubber powder.
5. The mortar composition according to claim 1 or 2, wherein the cellulose ether has a viscosity of 20000-; and/or the presence of a gas in the gas,
the filler is at least one of metakaolin, fumed silica and silica fume.
6. The mortar composition according to claim 1 or 2, wherein the graded sand is at least one selected from graded quartz sand having an average particle size of 100-220 μm; and/or the presence of a gas in the gas,
the water reducing agent is selected from at least one of a polycarboxylic acid water reducing agent and a melamine water reducing agent; and/or the presence of a gas in the gas,
the defoaming agent is a powder defoaming agent; and/or the presence of a gas in the gas,
relative to 100 parts by weight of cement, the content of the graded sand is 12-36 parts by weight, the content of the water reducing agent is 0.4-1 part by weight, and the content of the defoaming agent is 0.4-1 part by weight.
7. A method for preparing a one-component waterproof mortar, comprising: mixing the components of the mortar composition according to any one of claims 1 to 6, wherein the mixing conditions at least satisfy: the time is 10-20 min.
8. A one-component water-proofing mortar prepared by the method of claim 7.
9. Use of the one-component waterproofing mortar of claim 8 in waterproofing buildings.
10. The use according to claim 9, wherein the amount by weight ratio of the single-component waterproof mortar to water is 1: 0.2-0.25.
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| JP2942869B2 (en) * | 1990-06-19 | 1999-08-30 | 三菱レイヨン株式会社 | Rubber asphalt waterproofing composition |
| GB2462427A (en) * | 2008-08-05 | 2010-02-10 | Abdul-Rahim Ibrhaim Al-Hadidy | Asphalt composition |
| CN103183492B (en) * | 2013-04-17 | 2015-02-04 | 昆明风行防水材料有限公司 | Asphalt polymer cement waterproof coating |
| CN104230241A (en) * | 2014-09-11 | 2014-12-24 | 北京东方雨虹防水技术股份有限公司 | Waterproof mortar of asphalt and preparation method of waterproof mortar |
| CN105112032B (en) * | 2015-09-17 | 2017-12-05 | 西南石油大学 | A kind of oil-well cement slurry system of modified natural kir toughener and its toughness reinforcing |
| CN110894153A (en) * | 2019-12-04 | 2020-03-20 | 北京建筑大学 | Waterproof mortar and preparation method thereof |
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