CN110818336A - Preparation process of flaky dry mortar - Google Patents
Preparation process of flaky dry mortar Download PDFInfo
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- CN110818336A CN110818336A CN201911334963.4A CN201911334963A CN110818336A CN 110818336 A CN110818336 A CN 110818336A CN 201911334963 A CN201911334963 A CN 201911334963A CN 110818336 A CN110818336 A CN 110818336A
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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
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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
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/12—Hydraulic lime
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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
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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
- C04B28/142—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 containing synthetic or waste calcium sulfate cements
- C04B28/144—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 containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention is applicable to the field of building mortar, and provides a preparation process of sheet-shaped dry mortar. By adopting the method, the heating temperature of the water-soluble hot melt adhesive can be obviously reduced, and the preparation energy consumption is reduced; meanwhile, the heating time is shortened, so that the mortar preparation efficiency can be improved; moreover, the dissolution temperature of the water-soluble hot melt adhesive selected by the invention is less than 100 ℃, and when the water-soluble hot melt adhesive is mixed with inorganic cementing materials and the like, the mixing temperature is also within 100 ℃, so that the performance influence on the inorganic cementing materials such as cement and the like and/or other organic additives and the like can be avoided, and the overall performance of the mortar can be ensured.
Description
Technical Field
The invention relates to the field of building mortar, in particular to a preparation process of flaky dry mortar.
Background
The dry-mixed mortar is dry powder formed by mixing raw materials such as cementing materials, aggregates, additives and the like, and is one of the materials with the largest use amount in the building engineering. However, it presents two major problems in its application: firstly, produce serious raise dust pollution when adding water mix at the job site, secondly, the product form of discrete form and great raw materials density difference lead to the component easily to segregate, and the distribution is inhomogeneous, and product quality is unstable.
One existing solution to the above problems is to prepare sheet mortar by a hot-melt method, as disclosed in EP2994283B1, i.e., adding water-soluble hot-melt adhesive powder to dry-mixed mortar raw materials, mixing to form a new mixture, heating the mixture to melt the water-soluble hot-melt adhesive therein, pressing the mixture into a sheet in a mold, and cooling, thereby consolidating the other mortar raw materials into a whole with the help of the solidified water-soluble hot-melt adhesive. The sheet mortar prepared by the method can be quickly dissolved into a wet mortar state when meeting water during application, and then the same construction operation as the traditional mortar can be carried out. The flaky mortar does not have a powder mixing link in application, so that dust pollution is avoided. In addition, the flaky form effectively maintains the uniformity of the raw material components, so that the product has better quality stability.
However, the above-mentioned solutions have significant disadvantages. Since the water-soluble hot melt adhesive powder is mixed with other mortar raw materials in advance and then heated, in order to melt the water-soluble hot melt adhesive, it is necessary to overcome the thermal resistance formed by the other raw materials surrounding the water-soluble hot melt adhesive powder, and thus the heating temperature must be significantly higher than the melting temperature of the water-soluble hot melt adhesive itself. Higher heating temperatures can have two negative effects: firstly, the preparation energy consumption is high, and secondly, the product performance is reduced. For example, when the temperature of the heated cement exceeds 100 ℃, the setting time is shortened rapidly, the phenomenon of false setting occurs, and when other organic additives in the mortar exceed 100 ℃, changes such as discoloration and embrittlement often occur, and further the mortar performance is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the conventional sheet dry mortar preparation process and provides the sheet mortar preparation process which is remarkably reduced in preparation energy consumption and has small influence on the performance of raw materials.
In order to achieve the purpose, the technical scheme adopted by the invention is that water-soluble hot melt adhesive is separately melted and then mixed with dry mixture to obtain wet mixture, the wet mixture is adhered to two sides of the plane of the support body, and the sheet-shaped dry mortar is obtained after cooling and hardening. Specifically, the following steps are adopted:
(1) mixing an inorganic cementing material and an aggregate to obtain a dry mixture;
(2) heating and melting the water-soluble hot melt adhesive to obtain an adhesive solution;
(3) mixing the dry mixture obtained in the step (1) with the glue solution obtained in the step (2) to obtain a wet mixture;
(4) adhering the wet mixed material in the step (3) to two sides of the plane of the support body to obtain wet sheet mortar;
(5) and (4) cooling the wet sheet mortar in the step (4) to harden the wet sheet mortar, so as to obtain sheet dry mortar.
Furthermore, at least one of admixture, additive and fiber can be added into the dry mixture.
Further, the dry mixture comprises the following components in parts by weight: 15-70 parts of inorganic cementing material, 15-85 parts of aggregate, 0-30 parts of admixture, 0-10 parts of additive and 0-6 parts of fiber;
preferably, the fiber-reinforced composite material comprises 20-50 parts of inorganic cementing materials, 35-75 parts of aggregates, 0-15 parts of admixtures, 0-5 parts of additives and 0-3 parts of fibers.
Further, the additive is at least one of cellulose ether, redispersible latex powder, an early strength agent, a retarder, a waterproof agent and a polycarboxylic acid water reducing agent.
Further, the melting temperature of the water-soluble hot melt adhesive in the step (2) is 35-100 ℃.
Further, in the step (2), the water-soluble hot melt adhesive is at least one of polyethylene glycol, starch derivatives, cellulose derivatives and polysaccharide adhesives.
Further, the mixing temperature of the dry mixture and the glue solution in the step (3) is 45-100 ℃.
Further, the weight ratio of the dry mixture to the glue solution in the step (3) is 100 (4-16), preferably 100 (6-12).
On the other hand, the invention also provides the flaky dry mortar prepared by the preparation process.
The sheet mortar prepared by adopting the technical scheme of the invention has the following advantages:
1. according to the invention, the water-soluble hot melt adhesive is melted and then mixed with other mixed materials, so that the heating temperature of the water-soluble hot melt adhesive can be obviously reduced, and the energy consumption for preparation is reduced;
2. meanwhile, as the water-soluble hot melt adhesive is independently melted, compared with the water-soluble hot melt adhesive mixed with other mortar raw materials, the time required by melting can be obviously shortened, so that the mortar preparation efficiency is improved;
3. the melting temperature of the water-soluble hot melt adhesive selected by the invention is less than 100 ℃, and when the water-soluble hot melt adhesive is mixed with inorganic cementing materials and the like, the mixing temperature is also within 100 ℃, so that the performance influence on the inorganic cementing materials such as cement and the like and/or other organic additives and the like can be avoided, and the overall performance of the mortar is ensured;
4. the mortar prepared by the preparation process is flaky, and no powder mixing link exists during application, so that dust pollution is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the preparation of the sheet-like dry mortar of the present invention.
Detailed Description
The following description provides many different embodiments, or examples, for implementing different features of the invention. The particular examples set forth below are illustrative only and are not intended to be limiting.
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.
As shown in figure 1, the preparation process of the sheet-like dry mortar of the invention comprises the following steps:
(1) mixing an inorganic cementing material and an aggregate to obtain a dry mixture;
(2) heating and melting the water-soluble hot melt adhesive to obtain an adhesive solution;
(3) mixing the dry mixture obtained in the step (1) with the glue solution obtained in the step (2) to obtain a wet mixture;
(4) adhering the wet mixed material in the step (3) to two sides of the plane of the support body to obtain wet sheet mortar;
(5) and (4) cooling the wet sheet mortar in the step (4) to harden the wet sheet mortar, so as to obtain sheet dry mortar.
The water-soluble hot melt adhesive is melted and then mixed with other mixed materials, so that the heating temperature of the water-soluble hot melt adhesive can be obviously reduced, and the energy consumption for preparation is reduced; meanwhile, as the water-soluble hot melt adhesive is independently melted, compared with the water-soluble hot melt adhesive mixed with other mortar raw materials, the time required by melting can be obviously shortened, and the mortar preparation efficiency is improved.
Furthermore, in order to save inorganic cementing materials, improve mortar performance, adjust mortar strength and the like, properly adding admixtures into the dry mixture; in order to improve the crack resistance of the mortar, fibers are added into the dry mixture; different additives such as cellulose ether, redispersible latex powder, an early strength agent, a retarder, a waterproof agent, a polycarboxylic acid water reducing agent and the like can be added to improve or realize various characteristics of the mortar. Different mixed materials can be selected according to the concrete application environment of the mortar, and the like for addition and combination, and the components of the mixed materials meet the following conditions: the dry mixture comprises the following components in parts by weight: 15-70 parts of inorganic cementing material, 15-85 parts of aggregate, 0-30 parts of admixture, 0-10 parts of additive and 0-6 parts of fiber; preferably, the fiber-reinforced composite material comprises 20-50 parts of inorganic cementing materials, 35-75 parts of aggregates, 0-15 parts of admixtures, 0-5 parts of additives and 0-3 parts of fibers.
Further, the weight ratio of the dry mixture to the glue solution is 100 (4-16), preferably 100 (6-12).
In order to prevent the performance of the mortar from being affected by the overhigh temperature of the water-soluble hot melt adhesive, the water-soluble hot melt adhesive with the melting temperature lower than 100 ℃ is preferred, such as polyethylene glycol, starch derivatives, cellulose derivatives, polysaccharide adhesives and the like, and when the water-soluble hot melt adhesive is mixed with dry mixtures, the mixing temperature is controlled to be 45-100 ℃, the change of the properties of cement, additives and the like caused in the mixing process is prevented, and the performance of the mortar is further ensured.
It can be understood that, when the dry mixture in the step (1) and the glue solution in the step (2) are mixed, there are various mixing manners, such as stirring and mixing, dipping and mixing, and whatever form of mixing manner is adopted, the dry mixture and the glue solution are mixed uniformly.
The supporting body adopted in the step (3) can be a reinforcing net, the reinforcing net is at least one of glass fiber mesh cloth, a plastic net and a metal net, the wet mixture is adhered to two sides of the supporting body, and can be uniformly adhered or non-uniformly adhered (such as a structure with bulges and grooves or other structures) according to the use requirement, and the sheet-shaped mortar with the thickness of 1-10mm is formed after cooling and hardening.
And (5) cooling for more than 2min to harden.
It is worth mentioning that the inorganic gelling materials used herein are those commonly used in the art, such as cement, lime, gypsum, etc., and one or more of them can be selected by those skilled in the art as required for the formulation;
the aggregate used herein is also conventional aggregate, such as natural sand, machine-made sand, light aggregate, etc., the light aggregate can be selected from expanded perlite, vitrified micro-bead, hollow glass bead, foamed resin particle, expanded clay, etc., one or more of them can be selected by those skilled in the art to be blended according to actual needs.
The admixture adopted in the method is one or more of fly ash, slag powder, silica fume, zeolite powder, desulfurized gypsum, limestone powder, steel slag powder, phosphorous slag powder and the like.
Those skilled in the art can select appropriate additives according to the properties of the formulated materials, such as at least one of cellulose ether, redispersible latex powder, early strength agent, retarder, water repellent, polycarboxylate water reducer, more specifically, at least one of methyl cellulose, hydroxyethyl cellulose, carboxyethyl methyl cellulose, hydroxypropyl methyl cellulose, etc.; the redispersible latex powder is at least one of ethylene-vinyl acetate copolymer, ethylene-vinyl chloride-vinyl laurate terpolymer, vinyl acetate-ethylene-higher fatty acid vinyl ester terpolymer, vinyl acetate-acrylate-higher fatty acid vinyl ester terpolymer and the like; the early strength agent is at least one of sodium sulfate, potassium sulfate, calcium chloride, triethanolamine and the like; the retarder is at least one of lignosulfonate, calcium saccharate, gluconate, citric acid, tartaric acid and the like; the waterproof agent is at least one of potassium stearate, sodium stearate, organic silicon and the like.
The fiber selected in the method is at least one of carbon fiber, glass fiber, steel fiber, polymer fiber and the like; more specifically, the polymer fiber is at least one of polyamide fiber, polypropylene fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber, polyester fiber, aramid fiber, spandex fiber, and the like.
Several specific examples are set forth below to demonstrate the feasibility of the preparation process of the present invention.
Example 1
A preparation process of flaky dry mortar comprises the following steps:
(1) mixing 20 parts by weight of cement, 70 parts by weight of river sand, 6 parts by weight of fly ash, 2 parts by weight of ethylene-vinyl acetate copolymer rubber powder, 1 part by weight of hydroxypropyl methyl cellulose and 1 part by weight of glass fiber (0.3mm) to obtain a dry mixture;
(2) heating and melting 8 parts by weight of polyethylene glycol (average molecular weight 4000) at 56-58 ℃ to obtain a glue solution;
(3) stirring and mixing the dry mixture obtained in the step (1) and the polyethylene glycol glue solution obtained in the step (2) in a container to obtain a wet mixture, and heating the container to keep the temperature of the wet mixture at 56-58 ℃;
(4) uniformly coating the wet mixed material in the step (3) on two sides of the plane of the glass fiber mesh cloth to obtain wet sheet mortar with the thickness of 3 mm;
(5) and (4) cooling the wet sheet mortar in the step (4) for 10min at the temperature of 25 ℃ to harden the wet sheet mortar, so as to obtain the sheet dry mortar.
Example 2
A preparation process of flaky dry mortar comprises the following steps:
(1) mixing 45 parts by weight of cement, 5 parts by weight of lime, 25 parts by weight of river sand, 10 parts by weight of expanded perlite, 12 parts by weight of desulfurized gypsum, 2 parts by weight of vinyl acetate-ethylene-higher fatty acid vinyl ester terpolymer rubber powder, 0.5 part by weight of methyl cellulose and 0.5 part by weight of polypropylene fiber (0.3mm) to obtain a dry mixture;
(2) heating 7 parts by weight of polyethylene glycol (average molecular weight 6000) at 58-60 ℃ to melt to obtain glue solution;
(3) stirring and mixing the dry mixture obtained in the step (1) and the polyethylene glycol glue solution obtained in the step (2) in a container to obtain a wet mixture, and heating the container to keep the temperature of the wet mixture at 58-60 ℃;
(4) uniformly coating the wet mixed material in the step (3) on two sides of the plane of the glass fiber mesh cloth to obtain wet sheet mortar with the thickness of 3 mm;
(5) and (4) cooling the wet sheet mortar in the step (4) for 15min at the temperature of 25 ℃ to harden the wet sheet mortar, so as to obtain the sheet dry mortar.
Example 3
A preparation process of flaky dry mortar comprises the following steps:
(1) mixing 28 parts by weight of cement, 5 parts by weight of lime, 55 parts by weight of river sand, 5 parts by weight of vitrified micro bubbles, 4 parts by weight of slag powder, 1.8 parts by weight of ethylene-vinyl acetate copolymer rubber powder, 0.2 part by weight of carboxyethyl methyl cellulose, 0.1 part by weight of polycarboxylic acid water reducer, 0.4 part by weight of calcium chloride and 0.5 part by weight of polyamide fiber (0.3mm) to obtain a dry mixture;
(2) 6 parts by weight of polyethylene glycol (average molecular weight 8000) is heated and melted at 62-64 ℃ to obtain glue solution;
(3) stirring and mixing the dry mixture obtained in the step (1) and the polyethylene glycol glue solution obtained in the step (2) in a container to obtain a wet mixture, and heating the container to keep the temperature of the wet mixture at 62-64 ℃;
(4) uniformly coating the wet mixed material in the step (3) on two sides of the plane of the glass fiber mesh cloth to obtain wet sheet mortar with the thickness of 3 mm;
(5) and (4) cooling the wet sheet mortar in the step (4) for 10min at the temperature of 25 ℃ to harden the wet sheet mortar, so as to obtain the sheet dry mortar.
Example 4
A preparation process of flaky dry mortar comprises the following steps:
(1) mixing 16 parts by weight of cement, 72 parts by weight of river sand, 6 parts by weight of vitrified micro bubbles, 4 parts by weight of fly ash, 0.5 part by weight of ethylene-vinyl acetate copolymer rubber powder, 0.4 part by weight of hydroxypropyl methyl cellulose, 0.1 part by weight of polycarboxylic acid water reducing agent, 0.5 part by weight of sodium sulfate and 0.5 part by weight of polyamide fiber (0.3mm) to obtain a dry mixture;
(2) heating and melting 8 parts by weight of polyethylene glycol (average molecular weight 4000) at 56-58 ℃ to obtain a glue solution;
(3) stirring and mixing the dry mixture obtained in the step (1) and the polyethylene glycol glue solution obtained in the step (2) in a container to obtain a wet mixture, and heating the container to keep the temperature of the wet mixture at 56-58 ℃;
(4) uniformly coating the wet mixed material in the step (3) on two sides of the plane of the glass fiber mesh cloth to obtain wet sheet mortar with the thickness of 3 mm;
(5) and (4) cooling the wet sheet mortar in the step (4) for 10min at the temperature of 25 ℃ to harden the wet sheet mortar, so as to obtain the sheet dry mortar.
Example 5
A preparation process of flaky dry mortar comprises the following steps:
(1) mixing 35 parts by weight of cement and 65 parts by weight of river sand to obtain a dry mixture;
(2) heating and melting 8 parts by weight of polyethylene glycol (average molecular weight 4000) at 56-58 ℃ to obtain a glue solution;
(3) stirring and mixing the dry mixture obtained in the step (1) and the polyethylene glycol glue solution obtained in the step (2) in a container to obtain a wet mixture, and heating the container to keep the temperature of the wet mixture at 56-58 ℃;
(4) uniformly coating the wet mixed material in the step (3) on two sides of the plane of the glass fiber mesh cloth to obtain wet sheet mortar with the thickness of 3 mm;
(5) and (4) cooling the wet sheet mortar in the step (4) for 10min at the temperature of 25 ℃ to harden the wet sheet mortar, so as to obtain the sheet dry mortar.
Comparative example 1
The difference from the example 2 is only that the dry mixture comprises the following components in parts by weight: 55 parts of cement, 18 parts of lime, 8 parts of expanded perlite, 16 parts of desulfurized gypsum, 2g of vinyl acetate-ethylene-higher fatty acid vinyl ester terpolymer rubber powder, 0.5 part of methyl cellulose and 0.5 part of polypropylene fiber (0.3 mm).
Comparative example 2
The difference from the example 2 is only that the dry mixture comprises the following components in parts by weight: 10 parts by weight of cement, 2 parts by weight of lime, 86 parts by weight of river sand, 1 part by weight of vinyl acetate-ethylene-higher fatty acid vinyl ester terpolymer rubber powder, 0.5 part by weight of methyl cellulose and 0.5 part by weight of polypropylene fiber (0.3 mm).
Comparative example 3
The difference from example 2 is only that the amount of the polyethylene glycol is 3.5 parts by weight.
Comparative example 4
The difference from example 2 is only that the blending amount of the polyethylene glycol is 17 parts by weight.
Comparative example 5
The only difference with respect to example 2 is that the mixing temperature of the wet mix was 110 ℃.
According to the basic performance test method standard of building mortar JGJ/T70-2009, performance data of examples 1-5 and comparative examples 1-5 are obtained through testing, and are shown in Table 1.
TABLE 1 results of performance testing of samples of each example
As can be seen from the above table, when the preparation method of the present invention is used to prepare a sheet-like mortar, the components of the components and the preparation conditions are not within the ranges of the invention (e.g., comparative examples 1, 2, 4, 5), the prepared mortar is degraded, and even the mortar cannot be molded (e.g., comparative example 3). The sheet mortar prepared by the method has good performance, and can reduce preparation energy consumption and improve preparation efficiency.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A preparation process of flaky dry mortar is characterized by comprising the following steps:
(1) mixing an inorganic cementing material and an aggregate to obtain a dry mixture;
(2) heating and melting the water-soluble hot melt adhesive to obtain an adhesive solution;
(3) mixing the dry mixture obtained in the step (1) with the glue solution obtained in the step (2) to obtain a wet mixture;
(4) adhering the wet mixed material in the step (3) to two sides of the plane of the support body to obtain wet sheet mortar;
(5) and (4) cooling the wet sheet mortar in the step (4) to harden the wet sheet mortar, so as to obtain sheet dry mortar.
2. The process of claim 1, wherein at least one of admixtures, additives and fibers are further selected in step (1) to be mixed with the inorganic cementitious material and aggregate.
3. The preparation process according to claim 1 or 2, wherein the dry mixture in the step (1) comprises the following components in parts by weight: 15-70 parts of inorganic cementing material, 15-85 parts of aggregate, 0-30 parts of admixture, 0-10 parts of additive and 0-6 parts of fiber; preferably, the fiber-reinforced composite material comprises 20-50 parts of inorganic cementing materials, 35-75 parts of aggregates, 0-15 parts of admixtures, 0-5 parts of additives and 0-3 parts of fibers.
4. The preparation process of claim 2, wherein the additive is at least one of cellulose ether, re-dispersible latex powder, an early strength agent, a retarder, a waterproof agent and a polycarboxylic acid water reducing agent.
5. The process of claim 2, wherein the fibers are at least one of carbon fibers, glass fibers, steel fibers, and polymer fibers.
6. The preparation process of claim 1, wherein the melting temperature of the water-soluble hot melt adhesive in the step (2) is 35 ℃ to 100 ℃.
7. The process according to claim 1 or 6, wherein the water-soluble hot melt adhesive in step (2) is at least one of polyethylene glycol, starch derivatives, cellulose derivatives, and polysaccharide adhesives.
8. The preparation process according to claim 1, wherein the mixing temperature of the dry mixture and the glue solution in the step (3) is 45-100 ℃.
9. The preparation process according to claim 1, wherein the weight ratio of the dry mixture to the glue solution in the step (3) is 100 (4-16), preferably 100 (6-12).
10. A dry mortar in sheet form prepared by the process of any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112521033A (en) * | 2020-11-17 | 2021-03-19 | 徐强 | Cement clinker and processing technology thereof |
| CN112720787A (en) * | 2020-12-25 | 2021-04-30 | 中国建筑标准设计研究院有限公司 | Preparation process of flaky dry mortar and flaky dry mortar |
| CN112720787B (en) * | 2020-12-25 | 2022-08-02 | 中国建筑标准设计研究院有限公司 | Preparation process of flaky dry mortar and flaky dry mortar |
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