CN111777393A - Quick-drying elastic repair mortar with micro-expansibility and preparation method thereof - Google Patents
Quick-drying elastic repair mortar with micro-expansibility and preparation method thereof Download PDFInfo
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- CN111777393A CN111777393A CN202010666006.8A CN202010666006A CN111777393A CN 111777393 A CN111777393 A CN 111777393A CN 202010666006 A CN202010666006 A CN 202010666006A CN 111777393 A CN111777393 A CN 111777393A
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- Prior art keywords
- quick
- micro
- expansibility
- drying
- repair mortar
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—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
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/32—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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
Abstract
The invention discloses quick-drying elastic repair mortar with micro-expansibility and a preparation method thereof, belonging to the technical field of building materials. The quick-drying elastic repair mortar with the micro-expansibility consists of a liquid part and a powder part, wherein the liquid part comprises the following components in percentage by mass: the powder part = 0.5-0.7: 1, and the preparation method of the quick-drying elastic repair mortar with micro-expansibility comprises the steps of powder part preparation and liquid part preparation. According to the invention, the nano rectorite with a porous structure is added into a ternary system of portland cement, sulphoaluminate cement and alpha-gypsum to effectively and compactly fill gaps between a ternary cementing material and an aggregate, so that the cracking problem caused by drying shrinkage after the construction of a traditional material is avoided, the styrene-acrylic emulsion with ultrahigh solid content and low Tg of a liquid material component provides the whole elastic anti-vibration performance for a mixed material, the shrinkage of the material in the drying and curing process is further reduced, and the problem of repairing cracks is avoided.
Description
Technical Field
The invention relates to quick-drying elastic repair mortar with micro-expansibility and a preparation method thereof, belonging to the technical field of building materials.
Background
In the waterproof construction of the wet area of the household kitchen and bathroom, the problems that cracks of various walls and floors need to be repaired, the circular arcs of internal and external corners and pipe roots need to be processed and the like can be encountered. Based on the GB 23440-2009 inorganic waterproof plugging material standard, portland cement, sulphoaluminate cement, high-alumina cement and a material with quick-drying performance of a cement and gypsum composite system are well applied, in the aspects of crack repair, internal and external corner and pipe root treatment, a quick-drying sulphoaluminate system single-component material is mostly adopted, and high-strength quick-setting crack repair, water resistance and plugging are realized by adding a proper amount of rubber powder and other construction aids on the basis of a sulphoaluminate system, but the material has high rigidity, has obvious weakness in the aspects of flexibility and crack resistance in the later period, and has the risk of system waterproof failure;
in addition, based on the GB/T23445-2009 polymer cement waterproof coating standard, the material is widely used for forming a polymer cement-based composite waterproof material with a polymer emulsion, and the characteristics of high flexibility, strong adhesion and high strength of the material are realized, but the material is easy to crack, shell and the like in thick-layer construction, and cannot be used for crack deep repair, arc treatment of a negative and positive angle and a pipe root, so that a high-flexibility elastic repair mortar with micro-expansion quick drying for crack repair and negative and positive angle treatment is developed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the quick-drying elastic repair mortar with the micro-expansibility and the preparation method thereof are provided, the problem of later cracking of rigid materials is solved, and the problem of stacking and cracking of the existing polymer cement-based materials is solved.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a quick-drying elastic repair mortar with micro-expansibility comprises a liquid part and a powder part, wherein the liquid part comprises the following components in percentage by mass: the powder part is 0.5-0.7: 1;
the powder part comprises the following components in parts by mass: 10-30% of Portland cement, 2-15% of sulphoaluminate cement, 1-10% of alpha-gypsum, 40-70% of quartz sand, 5-20% of calcium powder, 2-15% of nano rectorite, 0.2-1% of cellulose ether, 0.2-1% of starch ether and 0.05-1% of lithium sulfate;
the liquid material part comprises the following components in parts by mass: 80-99% of styrene-acrylic emulsion, 1-20% of water, 0.1-1.5% of plasticizer, 0.1-1% of organosilicon defoamer and 0.1-0.5% of bactericide.
As a preferable example, the mesh number of the quartz sand is less than or equal to 70 meshes or the quartz sand is compounded by 20-70 meshes of quartz sand and 80-140 meshes of quartz sand, and the mesh number of the calcium powder is 200 meshes.
As a preferred example, the cellulose ether has a viscosity of 5000 mPaS or less.
As a preferable example, the solid content of the styrene-acrylic emulsion is 55-75%, and TG is less than or equal to-15 ℃.
As a preferable example, the plasticizer is a silicone plasticizer, and the active ingredient of the bactericide is an isothiazolinone compound.
A preparation method of quick-drying elastic repair mortar with micro-expansibility is characterized by comprising the following steps: the method comprises the following steps:
step one, partial preparation of powder: accurately weighing the components according to the proportion, premixing the weighed Portland cement, sulphoaluminate cement, alpha-gypsum, quartz sand, calcium powder and nano rectorite in a common steel basin, adding the weighed auxiliary agents, wherein the auxiliary agents are cellulose ether, starch ether and lithium sulfate, manually stirring in advance, pouring the mixture into a JC/T681-2005 planetary cement mortar stirrer for stirring the materials at a low speed (140r/min) at a standard environmental temperature of 23 +/-2 ℃ and a humidity of 55 +/-5%, and stirring for 15 minutes to uniformly mix;
step two, preparing a liquid material part: the materials of the styrene-acrylic emulsion (Tg is less than or equal to-15 ℃), the plasticizer, the organosilicon defoamer, the bactericide, water and the like are weighed according to the proportion, the components are sequentially added into a fixed container according to the sequence of the styrene-acrylic emulsion, the additive (the plasticizer, the organosilicon defoamer and the bactericide) and the water, the mixture is dispersed in an SFJ-400 dispersion stirrer (800r/min) for 20-30 minutes and uniformly mixed at the standard environment temperature of 23 +/-2 ℃ and the humidity of 55 +/-5 percent.
The invention has the beneficial effects that: according to the powder component, nano rectorite with a porous structure is added into a ternary system of portland cement, sulphoaluminate cement and alpha-gypsum, the lamellar characteristic of the nano rectorite is subjected to hydration reaction when meeting water to realize micro-expansion of the material, the nano rectorite is effectively filled and tightly filled in a gap between the ternary cementing material and aggregate, the cracking problem caused by drying shrinkage after the traditional material construction is avoided, in addition, the micro-expansion characteristic of the nano rectorite and the alpha-gypsum solves the problem of fusion cracking of a liquid material with the mixing amount of the styrene-acrylic emulsion being 80-99% and a cement-based powder material, and the quick drying of the ternary system can effectively solve the cracking problem in the dry-solid process of the material;
the styrene-acrylic emulsion with ultrahigh solid content and low Tg of the liquid material components is another innovative advantage of the material, the styrene-acrylic emulsion with low Tg provides the whole elastic anti-vibration performance for the mixed material, and the high solid content of 55-75% further reduces the shrinkage of the material in the dry curing process, avoids the generation source of cracking during repair, and further realizes the common crack resistance of the material in construction and later period.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the embodiment.
A quick-drying elastic repair mortar with micro-expansibility is prepared according to a formula, and the components of a plurality of examples are shown in a table 1:
TABLE 1
In the above embodiments, the mesh number of the calcium powder is 200 meshes, the viscosity of the cellulose ether is less than or equal to 5000 mPa.S, the solid content of the styrene-acrylic emulsion is 65%, the TG is less than or equal to-15 ℃, the plasticizer is an organosilicon plasticizer, the active ingredient of the bactericide is an isothiazolinone compound, the carbazone is selected, and the organosilicon defoamer is a commercial Wake organosilicon defoamer.
A preparation method of quick-drying elastic repair mortar with micro-expansibility comprises the following steps:
step one, partial preparation of powder: accurately weighing the components according to the proportion, premixing the weighed Portland cement, sulphoaluminate cement, alpha-gypsum, quartz sand, calcium powder and nano rectorite in a common steel basin, adding the weighed auxiliary agents, wherein the auxiliary agents are cellulose ether, starch ether and lithium sulfate, manually stirring in advance, pouring the mixture into a JC/T681-2005 planetary cement mortar stirrer for stirring the materials at a low speed (140r/min) at a standard environmental temperature of 23 +/-2 ℃ and a humidity of 55 +/-5%, and stirring for 15 minutes to uniformly mix;
step two, preparing a liquid material part: the materials of the styrene-acrylic emulsion (Tg is less than or equal to-15 ℃), the plasticizer, the organosilicon defoamer, the bactericide, water and the like are weighed according to the proportion, the components are sequentially added into a fixed container according to the sequence of the styrene-acrylic emulsion, the additive (the plasticizer, the organosilicon defoamer and the bactericide) and the water, the mixture is dispersed in an SFJ-400 dispersion stirrer (800r/min) for 20-30 minutes and uniformly mixed at the standard environment temperature of 23 +/-2 ℃ and the humidity of 55 +/-5 percent.
When the quick-drying elastic repair mortar with the micro-expansibility is used, the construction temperature is 0-40 ℃, the relative humidity is 10-80%, and corresponding grooving treatment is firstly carried out on cracks to carry out V-shaped treatment; the liquid material part is used after being opened, a roller or a brush is used for uniformly brushing the V-shaped cracks to homogenize the base surface, and after 30-40 minutes, the surface of the liquid material part is dried and solidified; and mixing the powder part and the liquid part according to the ratio suggested by the package (the powder part: the liquid part is 1: 0.5-1: 0.7), stirring the mixture by using an electric stirrer until fluid slurry is uniform, uniformly coating the mixed material in gaps and cracks by using a plastering knife, finishing one-step construction, compacting and polishing.
Comparative example
The two-component JS waterproof coating and waterproof slurry sold in the market are selected and developed based on a common silicate system.
The mortars and comparative examples prepared in the above examples were subjected to various performance tests, and the test results are shown in table 2:
TABLE 2
In summary, and in combination with tables 1 and 2, the product obtained by the present invention has the following advantages compared with the product of the comparative example: 1. the nano rectorite with the powder part porous structure of the quick-drying elastic repair mortar with the micro-expansibility realizes the self-repairing function of the material when expanding and meeting water; 2. the styrene-acrylic emulsion with ultrahigh solid content and Tg of less than or equal to minus 15 ℃ is compounded with sulphoaluminate cement, silicate cement and alpha-gypsum to realize the quick-drying high-elasticity effect of the mortar, and the mortar is suitable for crack repair and arc treatment of internal and external corners; 3. the scientific proportion of the sulphoaluminate cement, the portland cement and the alpha-gypsum realizes the effect of quick drying and cracking resistance of the thick layer construction material.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A quick-drying elastic repair mortar with micro-expansibility is characterized in that: the powder material consists of a liquid material part and a powder material part, wherein the liquid material part comprises the following components in percentage by mass: the powder part is 0.5-0.7: 1;
the powder part comprises the following components in parts by mass: 10-30% of Portland cement, 2-15% of sulphoaluminate cement, 1-10% of alpha-gypsum, 40-70% of quartz sand, 5-20% of calcium powder, 2-15% of nano rectorite, 0.2-1% of cellulose ether, 0.2-1% of starch ether and 0.05-1% of lithium sulfate;
the liquid material part comprises the following components in parts by mass: 80-99% of styrene-acrylic emulsion, 1-20% of water, 0.1-1.5% of plasticizer, 0.1-1% of organosilicon defoamer and 0.1-0.5% of bactericide.
2. The quick-drying elastic repair mortar with micro-expansibility according to claim 1, wherein: the mesh number of the quartz sand is less than or equal to 70 meshes or the quartz sand is prepared by compounding 20-70 meshes of quartz sand and 80-140 meshes of quartz sand, and the mesh number of the calcium powder is 200 meshes.
3. The quick-drying elastic repair mortar with micro-expansibility according to claim 1, wherein: the viscosity of the cellulose ether is less than or equal to 5000mPa & S.
4. The quick-drying elastic repair mortar with micro-expansibility according to claim 1, wherein: the solid content of the styrene-acrylic emulsion is 55-75%, and the TG is less than or equal to-15 ℃.
5. The quick-drying elastic repair mortar with micro-expansibility according to claim 1, wherein: the plasticizer is an organic silicon plasticizer, and the active component of the bactericide is an isothiazolinone compound.
6. A preparation method of quick-drying elastic repair mortar with micro-expansibility is characterized by comprising the following steps: the method comprises the following steps:
step one, partial preparation of powder: accurately weighing the components according to the proportion, premixing the weighed Portland cement, sulphoaluminate cement, alpha-gypsum, quartz sand, calcium powder and nano rectorite in a common steel basin, adding the weighed auxiliary agents, wherein the auxiliary agents are cellulose ether, starch ether and lithium sulfate, manually stirring in advance, pouring the mixture into a JC/T681-2005 planetary cement mortar stirrer for stirring the materials at a low speed (140r/min) at a standard environmental temperature of 23 +/-2 ℃ and a humidity of 55 +/-5%, and stirring for 15 minutes to uniformly mix;
step two, preparing a liquid material part: the materials of the styrene-acrylic emulsion (Tg is less than or equal to-15 ℃), the plasticizer, the organosilicon defoamer, the bactericide, water and the like are weighed according to the proportion, the components are sequentially added into a fixed container according to the sequence of the styrene-acrylic emulsion, the additive (the plasticizer, the organosilicon defoamer and the bactericide) and the water, the mixture is dispersed in an SFJ-400 dispersion stirrer (800r/min) for 20-30 minutes and uniformly mixed at the standard environment temperature of 23 +/-2 ℃ and the humidity of 55 +/-5 percent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299808A (en) * | 2020-10-19 | 2021-02-02 | 同济大学 | High-performance facing mortar and preparation method thereof |
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2020
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| JPH1149551A (en) * | 1997-07-31 | 1999-02-23 | Asahi Glass Co Ltd | Production of hydraulic hardened body |
| CN102337109A (en) * | 2010-07-26 | 2012-02-01 | 北京仁创科技集团有限公司 | Sand-based composition and expanded sand as well as preparation method of expended sand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299808A (en) * | 2020-10-19 | 2021-02-02 | 同济大学 | High-performance facing mortar and preparation method thereof |
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| CN111777393B (en) | 2022-05-24 |
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