CN114180893B - Concrete mortar and construction method - Google Patents
Concrete mortar and construction method Download PDFInfo
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- CN114180893B CN114180893B CN202111618727.2A CN202111618727A CN114180893B CN 114180893 B CN114180893 B CN 114180893B CN 202111618727 A CN202111618727 A CN 202111618727A CN 114180893 B CN114180893 B CN 114180893B
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- concrete mortar
- mortar
- latex powder
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to concrete mortar and a construction method, and belongs to the field of concrete. The method comprises the following raw materials: latex powder, polyethylene glycol diacrylate, sulfur fixation ash, cellulose ether, a photoinitiator, cement, river sand and water. The construction method comprises the following steps: 1) building a template, and popping a leveling control line in the template; 2) pouring concrete mortar at intervals along the edge of the template, aligning the leveling control line to prepare a plurality of leveling ash cakes, pouring the concrete mortar at the positioning center of the diagonal bracing wires of the template, and aligning the bracing wires to prepare a central ash cake; 3) after the ash cakes are initially solidified, pouring concrete mortar into the empty spaces among the ash cakes to fully cover the templates and flattening the concrete mortar to be flush with the ash cakes; 4) and after the concrete mortar is initially set, laying permeable geotextile, and spraying and curing until the geotextile is solidified. The concrete mortar of this application has good self-leveling nature and closely knit degree, can make the mortar lay the rear surface more bright and clean level and smooth, has reduced the intensity of labour that the workman flattened many times for the construction of mortar is laid more swiftly.
Description
Technical Field
The invention relates to the field of concrete, in particular to concrete mortar and a construction method.
Background
The concrete mortar is a building material prepared by mixing cement, sand and water, and can be divided into masonry mortar and plastering mortar according to the performance requirements of specific use scenes, wherein the plastering mortar can be used for the ground to realize the effects of reinforcing the ground and improving the smoothness and the attractiveness of the ground.
Concrete mortar generally needs to be used after being mixed in a construction site, the mortar is poured to the ground and then is manually pushed to be flat by using a wood rod, however, most of the existing mortar needs to maintain proper strength and has high consistency, so that the mortar needs to be manually flattened for 2-3 times when beginning to be initially set after being laid for 6-8 hours, otherwise, the surface of the mortar is solidified to have more pores and scratches, the surface roughness is high, and the mortar is not beneficial to the smoothness and the protection effect of the ground, and therefore, the mortar needs to be further improved.
Disclosure of Invention
In order to improve the smoothness of the concrete mortar after being paved, the application provides the concrete mortar and a construction method.
The application provides a concrete mortar and a construction method, which adopts the following technical scheme:
in a first aspect, the present application provides a concrete mortar, which adopts the following technical scheme:
the concrete mortar is prepared from the following raw materials in parts by weight: 12-15 parts of latex powder, 7-8 parts of polyethylene glycol diacrylate, 15-20 parts of solid sulfur ash, 3-4 parts of cellulose ether, 0.3-0.4 part of photoinitiator, 142 parts of cement 128-containing material, 370 parts of river sand 350-containing material and 60-70 parts of water.
Through adding cellulose ether and emulsion powder, the cohesiveness of mortar has been improved, make the mortar have good constructability, in addition, through adding polyethylene glycol diacrylate and photoinitiator, take place self-crosslinking under the illumination of sunlight, thereby form rich elastic network structure in the mortar system, with the self-leveling of the cladding of cement thick liquids in order to promote the mortar, the degree of difficulty that flattens of mortar work progress has been reduced, through adding solid sulfur ash, make the mortar can last the water absorption inflation after the initial set, fill the inside hole of mortar, make the mortar concretion rear surface more closely knit, bright and clean, thereby the protection to ground and beautify the effect have been improved.
Preferably, the latex powder is one or a combination of acrylic latex powder, vinyl acetate latex powder and vinyl acetate-acrylic latex powder.
The raw materials are adopted as the latex powder, a large amount of grafted polyvinyl alcohol is contained in the latex powder, when a photoinitiator is exposed to sunlight, free radicals are generated and react with polyethylene glycol diacrylate to generate active centers, and hydrogen bonds are formed between the free radicals and the polyvinyl alcohol, so that a formed three-dimensional network has hydrogel texture, the self-leveling effect of mortar is promoted, the drying speed of the mortar is delayed, the mortar is fully hydrated, particularly, after the mortar is initially set, the hydration speed of the surface of the mortar is lower than that of the interior of the mortar, the gravity center of the formed hydrogel gradually moves upwards, the mortar is sealed by a hydration diaphragm, large particles on the surface of the mortar sink and extrude, cement and sulfur-fixing ash slag float and level, and a smooth and compact surface can be presented after the moisture of the mortar is gradually absorbed and volatilized.
Preferably, the latex powder comprises 3-4 parts of acrylic latex powder, 3-4 parts of vinyl acetate latex powder and 6-7 parts of
Mixing the latex powder of vinyl acetate-acrylic acid.
The acrylic latex powder, the vinyl acetate latex powder and the vinyl acetate-acrylic latex powder are mixed according to a proper proportion for use, so that the cohesiveness and the fluidity of the mortar are relatively balanced, and the construction performance is good.
Preferably, the cellulose ether is hydroxypropyl methyl cellulose ether with the viscosity of 100-150 Pa-s.
The hydroxypropyl methyl cellulose ether with proper viscosity is selected, so that the mortar is beneficial to improving the application property.
Preferably, the preparation method is as follows: uniformly mixing cement, solid sulfur ash, river sand and cellulose ether according to a ratio to prepare a premixed dry material; mixing and dispersing latex powder, water, polyethylene glycol diacrylate and a photoinitiator uniformly according to a ratio to obtain premixed slurry; and uniformly mixing the premixed slurry and the premixed dry material to obtain the concrete mortar.
The dry materials and the liquid are respectively and uniformly stirred, so that the dispersibility of each raw material of the mortar is better, the homogeneity of the mortar is improved, and the performance of the mortar is more stable.
In a second aspect, the present application provides a method for constructing concrete mortar, which adopts the following technical scheme:
a construction method of concrete mortar comprises the following steps:
the method comprises the following steps: building a template on the ground, and popping a leveling control line in the template;
step two: pouring concrete mortar at intervals along the edge of the template, aligning the leveling control line to prepare a plurality of leveling ash cakes, pouring the concrete mortar at the positioning center of the diagonal bracing wires of the template, and aligning the bracing wires to prepare a central ash cake;
step three: after the ash cakes are initially set, continuously pouring concrete mortar to the empty space between the ash cakes to fully pave the formwork, and pushing the concrete mortar to be flush with the ash cakes;
step four: and after the concrete mortar is solidified, paving permeable geotextile on the surface of the concrete mortar, and performing spray curing until the geotextile is completely solidified to finish construction.
By adopting the construction process, the mortar is poured in several times to help the mortar to be better paved, the labor intensity of a worker for leveling is reduced, the concrete mortar mixed by the raw materials has good self-leveling property and hydration compactness, and after the worker pours and levels the mortar, the good smooth and compact effect can be achieved without repeated subsequent leveling, so that the construction process of the mortar is simpler.
Preferably, the spacing between adjacent ash cakes is no greater than 150 cm.
By controlling the distance between the ash cakes, the mortar is better flattened after the subsequent mortar is poured, and the surface flatness of the mortar is improved.
Preferably, after the concrete mortar is paved and flattened for 24 hours, the permeable geotextile is paved for spray maintenance.
Too early laying of permeable geotextiles can affect the smoothness of the mortar surface, and too late laying can reduce the maintenance effect of the mortar.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the concrete mortar prepared by adding latex powder, polyethylene glycol diacrylate, solid sulfur ash, cellulose ether and other raw materials and mixing has good cohesiveness and self-fluidity, so that the mortar can be self-leveled after being poured, and the surface of the mortar is smoother and more compact;
2. by adopting the construction method of firstly pouring and manufacturing the ash cakes and then pouring and paving the mortar, the mortar can be better leveled and paved, the flatness of the ground is improved, and the labor intensity of workers for flattening for many times is reduced.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples
Example 1
A concrete mortar, the raw material dosage of example 1 is detailed in Table 1, and the preparation method is as follows:
weighing 132kg of cement, 17kg of clinker, 362kg of river sand and 3kg of hydroxypropyl methyl cellulose ether according to the dosage of the formula 1, pouring the materials into a stirring tank, and uniformly stirring and mixing to obtain a premixed dry material; weighing 14kg of acrylic latex powder, 64kg of water, 8kg of polyethylene glycol diacrylate and 0.4kg of photoinitiator, putting the acrylic latex powder, the water, the polyethylene glycol diacrylate and the photoinitiator into a stirring tank, dispersing for 20min at the rotating speed of 100r/min, and vacuumizing to remove bubbles to obtain pre-mixed slurry; and after preparation of construction preparation work, uniformly mixing the ready-mixed slurry and the ready-mixed dry materials to obtain the concrete mortar.
Examples 2 to 5
The raw material amounts of examples 2 to 5 of a mortar concrete are shown in Table 1, and the preparation method thereof is the same as that of example 1.
TABLE 1 EXAMPLES 1-5 raw material usage Scale (unit: kg)
The raw materials adopted in the above embodiments are all commercial products, wherein the acrylic latex powder adopts Mitsubishi Mowinyl acrylic latex powder with the model of LDM7000P, the vinyl acetate latex powder adopts Mitsubishi Mowinyl vinyl acetate latex powder with the model of DM200, the vinyl acetate-acrylic latex powder adopts Mitsubishi Mowinyl vinyl acetate-acrylic latex powder with the model of LDM2077P, the hydroxypropyl methyl cellulose ether adopts Hebei Yanxing chemical Co., Ltd, the model of HT-E hydroxypropyl methyl cellulose ether with the viscosity of 150Pa.s, and the photoinitiator adopts IGM photoinitiator with the model of Omnirad 659.
Comparative example
Comparative example 1: the difference from example 1 is that the clinker in the ready-mixed dry material of comparative example 1 is replaced by river sand of equal quality.
Comparative example 2: the difference from example 1 is that the pre-mixed slurry of comparative example 2 is prepared by mixing 11kg of hydroxypropyl methyl cellulose ether, 8kg of polyethylene glycol diacrylate, 0.4kg of photoinitiator and 70kg of water uniformly, and evacuating to remove air bubbles.
Comparative example 3: the difference from example 1 is that the pre-mixed slurry in comparative example 3 is prepared by uniformly mixing 20kg of acrylic latex powder, 5g of hydroxypropyl methyl cellulose ether and 64kg of water, and evacuating to remove air bubbles.
Performance test
Experiment 1. detection of concrete mortar workability:
the concrete mortar prepared in the above examples 1 to 5 and comparative examples 1 to 3 was used as a test sample for performance test, the test standard was in accordance with "GB/T25181-2010 ready-mixed mortar", and five sets of parallel tests were performed on each test item of each test sample, and table 2 is an average value of each test result of each test sample.
Experiment 2. detection of apparent properties of concrete mortar:
the concrete mortars obtained in examples 1 to 5 and comparative examples 1 to 4 were cast into concrete samples having a length and width of 30cm × 30cm and a thickness of 15cm, and after casting and leveling, the concrete samples were left to stand for 24 hours for solidification, and the surfaces of the samples were observed and evaluated, and the results are shown in table 2.
TABLE 2 Performance test results
According to the performance detection results of the embodiments 1 to 5, the concrete mortar prepared in the embodiments 1 to 5 has good performances, meets the construction requirements, is particularly excellent in compressive strength and appearance, and is compared with the detection results of the comparative examples 1 to 3, so that the three raw materials of the latex powder, the polyethylene glycol diacrylate and the sulfur-fixing ash slag in the concrete mortar play a critical role in the self-leveling property and the hydration compactness of the concrete, the latex powder and the polyethylene glycol diacrylate are matched with each other, the cohesiveness of the concrete mortar can be improved, the mortar can be automatically leveled and compacted in the condensation process, the sulfur-fixing ash slag can play a good water absorption expansion property in the middle solidification period, and accumulated water dents caused by water analysis are reduced, so that the concrete mortar is more smooth and clean, The floor is compact, and has good protective performance on the floor and the effect of improving the attractiveness of the floor.
Application example
A construction method of concrete mortar comprises the following steps:
the method comprises the following steps: preparing a ground planned for pouring concrete mortar before construction, cleaning sand sundries on the ground, filling and leveling concave and convex parts to level the ground, then building a template required for pouring on the ground, popping a leveling control line in the template, and determining the laying thickness of the concrete mortar;
step two: preparing a ready-mixed dry material and a ready-mixed slurry (in other application examples, the raw material ratio of the concrete mortar in any one of the embodiments 2 to 5 can also be adopted), mixing the ready-mixed dry material and the ready-mixed slurry to prepare the concrete mortar when the concrete mortar can be poured, pouring the concrete mortar at intervals along the edge of a template, preparing a plurality of leveling ash cakes by aligning leveling control lines, wherein the interval between the adjacent leveling ash cakes is between 100 and 150cm, pouring the concrete mortar at the positioning center of diagonal bracing wires of the template, and preparing a central ash cake by aligning the bracing wires;
step three: after the mortar is initially set for 6 hours after the mortar is poured, mixing concrete mortar, continuously pouring the concrete mortar to the open space between the mortar to fully pave the formwork, and pushing the concrete mortar to be level with the mortar by using a wood rod;
step four: and after the concrete mortar to be subsequently poured is laid for 24 hours and solidified, laying permeable geotextile on the surface of the concrete mortar, and spraying once every day for curing until the concrete mortar is completely solidified, thereby completing construction.
The method is adopted for construction of the concrete mortar, a batch pouring mode is utilized, workers can assist in aligning and leveling a control line through ash cakes, the leveling burden of the workers caused by one-time pouring is reduced, and the flatness of the concrete mortar is also improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (7)
1. The concrete mortar is characterized by comprising the following raw materials in parts by weight: 12-15 parts of latex powder, 7-8 parts of polyethylene glycol diacrylate, 15-20 parts of solid sulfur ash, 3-4 parts of cellulose ether, 0.3-0.4 part of photoinitiator, 142 parts of cement 128-containing material, 370 parts of river sand 350-containing material and 60-70 parts of water; the latex powder is one or the combination of acrylic latex powder, vinyl acetate latex powder and vinyl acetate-acrylic latex powder.
2. The concrete mortar of claim 1, wherein the latex powder is formed by mixing 3-4 parts by weight of acrylic latex powder, 3-4 parts by weight of vinyl acetate latex powder and 6-7 parts by weight of vinyl acetate-acrylic latex powder.
3. A concrete mortar as claimed in claim 1, wherein the cellulose ether is hydroxypropyl methyl cellulose ether and has a viscosity of 150 Pa-s.
4. The concrete mortar of claim 1, wherein the preparation method comprises the following steps: uniformly mixing cement, solid sulfur ash, river sand and cellulose ether according to a ratio to prepare a premixed dry material; mixing and dispersing latex powder, water, polyethylene glycol diacrylate and a photoinitiator uniformly according to a ratio to obtain premixed slurry; and uniformly mixing the premixed slurry and the premixed dry material to obtain the concrete mortar.
5. A method of constructing a concrete mortar according to any one of claims 1 to 4, comprising the steps of:
the method comprises the following steps: building a template on the ground, and popping a leveling control line in the template;
step two: pouring concrete mortar at intervals along the edge of the template, aligning the leveling control line to prepare a plurality of leveling ash cakes, pouring the concrete mortar at the positioning center of the diagonal bracing wires of the template, and aligning the bracing wires to prepare a central ash cake;
step three: after the ash cakes are initially set, continuously pouring concrete mortar to the empty space between the ash cakes to fully pave the formwork, and pushing the concrete mortar to be flush with the ash cakes;
step four: and after the concrete mortar is solidified, paving permeable geotextile on the surface of the concrete mortar, and performing spray curing until the geotextile is completely solidified to finish construction.
6. A method of constructing a concrete mortar as claimed in claim 5, wherein the spacing between adjacent mortar cakes is not more than 150 cm.
7. The method for applying the concrete mortar according to claim 5, wherein after the concrete mortar is laid and flattened for 24 hours, the permeable geotextile is laid for spray curing.
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| CN202111618727.2A CN114180893B (en) | 2021-12-25 | 2021-12-25 | Concrete mortar and construction method |
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| CN202111618727.2A CN114180893B (en) | 2021-12-25 | 2021-12-25 | Concrete mortar and construction method |
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| CN114180893B true CN114180893B (en) | 2022-09-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103147562B (en) * | 2012-12-02 | 2015-05-27 | 上海馨来建筑装饰设计有限公司 | Construction method of ground cement mortar leveling |
| CN109133791A (en) * | 2018-09-10 | 2019-01-04 | 成都宏基建材股份有限公司 | A kind of dry-mixed ground mortar and its preparation and application containing solid sulfur ash |
| CN113006397A (en) * | 2021-02-22 | 2021-06-22 | 北京梵客家居科技有限公司 | Construction method for square leveling of kitchen and bathroom space |
| CN113307572A (en) * | 2021-06-17 | 2021-08-27 | 烟台瑞祥干混砂浆有限公司 | Anti-weathering plastering mortar and preparation process thereof |
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