CN113929400A - Plastering mortar and preparation method thereof - Google Patents
Plastering mortar and preparation method thereof Download PDFInfo
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- CN113929400A CN113929400A CN202111380923.0A CN202111380923A CN113929400A CN 113929400 A CN113929400 A CN 113929400A CN 202111380923 A CN202111380923 A CN 202111380923A CN 113929400 A CN113929400 A CN 113929400A
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- plastering mortar
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—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
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
- C04B16/0633—Polypropylene
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of mortar, and particularly discloses plastering mortar and a preparation method thereof. The plastering mortar comprises the following raw materials in parts by weight: 110 portions and 130 portions of cement; 30-50 parts of shale crushed stone; 350 portions and 380 portions of fine sand; 30-50 parts of water; 5-15 parts of a thickening agent; 10-20 parts of a reinforcing agent. The preparation method comprises the following steps: the method comprises the following steps: step1, mixing cement, a thickening agent and a reinforcing agent to obtain a first-class mixture; step2, mixing the primary mixture, fine sand and shale crushed stone to obtain a secondary mixture; and Step3, mixing the secondary mixture with water to obtain the plastering mortar. This application adopts shale rubble and fine sand as the aggregate of plastering mortar, because the shale rubble possesses micro-nano hole, the micro-nano hole of shale rubble has the effect of water storage, absorbs the air of reserving between wall body and the plastering mortar simultaneously, promotes the area of contact of plastering mortar and wall body, and thickener and reinforcer homoenergetic all can promote the bond strength of plastering mortar in addition.
Description
Technical Field
The application relates to the field of mortar, in particular to plastering mortar and a preparation method thereof.
Background
The plastering mortar is the mortar smeared on the surface of a building or a building component, the plastering mortar is generally formed by mixing cement, sand and water in a certain proportion, the plastering mortar is smeared with certain cohesive force so as to be adhered to the surface of the building, has higher strength after being formed, is not easy to deform, and has certain protection effect on a wall body.
The water in the plastering mortar can be combined with substances such as cement and the like, and finally, the plastering mortar is solidified and formed. Generally, the wall has the problem of unevenness, and when the plastering mortar is smeared on the wall, a cavity containing air is formed between the plastering mortar and the wall, so that the contact area between the plastering mortar and the wall is reduced, and the bonding strength between the plastering mortar and the wall is reduced. In addition, the dry bricks on the wall can absorb moisture in the plastering mortar, so that the water content in the plastering mortar is reduced, and the plastering mortar is easy to crack.
Disclosure of Invention
In order to improve the cohesiveness of the plastering mortar, the application provides the plastering mortar and a preparation method thereof.
In a first aspect, the present application provides a plastering mortar, which adopts the following technical scheme:
the plastering mortar is characterized by comprising the following raw materials in parts by weight:
110 portions of cement
30-50 parts of shale crushed stone;
350 portions and 380 portions of fine sand;
30-50 parts of water;
5-15 parts of a thickening agent;
10-20 parts of a reinforcing agent.
By adopting the technical scheme, the fine sand and the shale crushed stones are used as the aggregates of the plastering mortar, the granularity of the fine sand is smaller, the plastering mortar is endowed with better fluidity and better surface smoothness, the plastering mortar can be coated more uniformly when coated on a wall, and the surface of the plastering mortar can be smoother; the shale crushed stone contains micro-nano pores which can store partial moisture and play a role in retaining water for plastering mortar, so that the plastering mortar is not easy to crack, and when small bubbles exist between the plastering mortar and a wall body, air in the bubbles can enter the micro-nano pores of the shale crushed stone when being extruded, so that the contact area between the plastering mortar and the wall body can be increased, and the adhesion between the plastering mortar and the wall body is further enhanced; the water and the cement are mixed to play a role in connecting the aggregate, the thickening agent can enhance the cohesiveness of the plastering mortar and enhance the cohesive strength of the plastering mortar, and the reinforcing agent can enhance the cracking resistance of the plastering mortar, so that the plastering mortar has longer service life.
Preferably, the reinforcing agent comprises polypropylene fibers and polyacrylamide, and the ratio of the polypropylene fibers to the polyacrylamide is (10-13): (2-5).
By adopting the technical scheme, the molecular chain of the polypropylene fiber has stronger strength and is not easy to break, the cracking resistance of the plastering mortar can be enhanced by doping the polypropylene fiber into the plastering mortar, the polyacrylamide is a linear high-molecular polymer, the cracking resistance of the plastering mortar can be further enhanced by adding the polyacrylamide, and meanwhile, the polyacrylamide and the polypropylene fiber have similar units, so that the polyacrylamide and the polypropylene fiber have better compatibility.
Preferably, the reinforcing agent comprises polypropylene fibers and polyacrylamide, and the weight ratio of the polypropylene fibers to the polyacrylamide is 4: 1.
by adopting the technical scheme, the ratio of the polypropylene fiber to the polyacrylamide in the weight ratio of 4:1 can achieve a better anti-cracking effect.
Preferably, the thickener comprises methylcellulose and redispersible latex powder, and the weight ratio of the methylcellulose to the redispersible latex powder is (6-8): (2-4).
Preferably, the thickener comprises methylcellulose and re-dispersible latex powder, and the weight ratio of the methylcellulose to the re-dispersible latex powder is 7: 3.
By adopting the technical scheme, the water retention capacity of the dry-mixed mortar can be enhanced by adding the methyl cellulose into the plastering mortar, and the strength of the plastering mortar after solidification can be enhanced; the emulsion formed after the redispersible latex powder is dispersed in water has high bonding capability, and further enhances the bonding strength of the plastering mortar.
Preferably, the granularity of the shale crushed stone is 2mm or less than 2 mm.
By adopting the technical scheme, the shale crushed stone with overlarge granularity can cause the plane flatness of plastering mortar to be reduced, and meanwhile, when the particle size of the shale crushed stone is smaller, the specific surface area of the shale crushed stone can be increased, so that the micro-nano pores of the shale crushed stone can be increased.
Preferably, 30-40 parts of fly ash is also included.
By adopting the technical scheme, the fly ash also contains a plurality of micropores, the micropores in the fly ash can improve the water retention of the plastering mortar, and meanwhile, the density of the fly ash is low, so that the total weight of the plastering mortar can be reduced.
In a second aspect, the present application provides a method for preparing plastering mortar, which adopts the following technical scheme:
a preparation method of plastering mortar comprises the following steps:
step1, mixing cement, a thickening agent and a reinforcing agent to obtain a first-class mixture;
step2, mixing the primary mixture, fine sand and shale crushed stone to obtain a secondary mixture;
and Step3, mixing the secondary mixture with water to obtain the plastering mortar.
By adopting the technical scheme, the preparation method is simple and easy to implement, difficult construction conditions are not needed, the operation is easy, and the prepared plastering mortar has excellent cohesiveness and cracking resistance.
Preferably, fly ash is added in the Step2, and the fly ash is mixed with the primary mixture, fine sand and shale crushed stone.
By adopting the technical scheme, the uniformity of mixing the fly ash with the fine sand and the shale crushed stone can be enhanced by adding the fly ash into Step2, so that the uniformity of the plastering mortar is better.
1. Because this application adopts shale rubble and fine sand as the aggregate of plastering mortar, because the shale rubble possesses micro-nano hole, the micro-nano hole of shale rubble has the effect of water storage, and the air in the hole that forms between plastering mortar and the wall can enter into the micro-nano hole of shale rubble to reduce the hole that forms between plastering mortar and the wall body, thereby can strengthen the bonding effect of plastering mortar and wall body.
2. The polypropylene fiber and the polyacrylamide are preferably adopted as the reinforcing agent in the application, and both the polypropylene fiber and the polyacrylamide have longer molecular chains and the strength of the molecular chains is better, so that the anti-cracking performance of the plastering mortar can be enhanced by the polyacrylamide and the polypropylene fiber, and the polyacrylamide and the polypropylene fiber are better compatible and are easy to attract each other to form a net structure, so that the anti-cracking performance of the plastering mortar is further enhanced.
3. According to the method, the plastering mortar can be prepared by simply mixing and stirring under normal temperature, so that the effect of easy preparation is achieved.
Detailed Description
Table 1: sources of Components in examples and comparative examples
Preparation example
Preparation example 1
And crushing the shale crushed stone into particles with the particle size of 2mm or below 2mm to obtain the shale crushed stone A.
Preparation example 2
And crushing the shale crushed stone to the particle size of 2-4mm to obtain shale crushed stone B.
Examples
Example 1
Step1, mixing 110kg of cement, 3.5kg of methyl cellulose, 1.5kg of redispersible latex powder, 8kg of polypropylene fiber and 2kg of polyacrylamide for 10min to obtain a first-grade mixture;
step2, mixing the primary mixture, 350kg of fine sand and 30kg of shale crushed stone A, and blending for 5min to obtain a secondary mixture;
and Step3, mixing the secondary mixture and 30kg of water and stirring for 5min to obtain the plastering mortar.
Example 2
Step1, mixing 130kg of cement, 10.5kg of methyl cellulose, 4.5kg of redispersible latex powder, 16kg of polypropylene fiber and 4kg of polyacrylamide for 10min to obtain a first-grade mixture;
step2, mixing the primary mixture, 380kg of fine sand and shale crushed stone A50kg for 5min to obtain a secondary mixture;
and Step3, mixing the secondary mixture and 50kg of water and stirring for 5min to obtain the plastering mortar.
Example 3
Step1, mixing 130kg of cement, 7kg of methyl cellulose, 3kg of redispersible emulsion powder, 12kg of polypropylene fiber and 3kg of polyacrylamide for 10min to obtain a primary mixture;
step2, mixing the primary mixture, 380kg of fine sand and shale crushed stone A50kg for 5min to obtain a secondary mixture;
and Step3, mixing the secondary mixture and 50kg of water and stirring for 5min to obtain the plastering mortar.
Example 4 example 15
Examples 4-15 differ from example 3 only in the amount of thickener and enhancer incorporated.
Table 2: example 4-example 15 blending amounts of thickener and enhancer
Examples 12 to 15
Example 12-example 14 differed from example 3 only in that example 12-example 15 incorporated different weights of fly ash that was mixed with the primary mix, fine sand, shale ballast in Step 2.
Table 3: example 12-example 14 fly ash weight loadings
Comparative example
Comparative example 1
Comparative example 1 differs from example 3 only in that no reinforcing agent was added to comparative example 1.
Comparative example 2
Comparative example 2 differs from example 3 only in that the weight ratio of polypropylene fiber to polyacrylamide in comparative example 1 is 10: 1.
comparative example 3
Comparative example 3 differs from example 3 only in that no thickener is added to comparative example 3.
Comparative example 4
Comparative example 4 differs from example 3 only in that the weight ratio of methylcellulose to redispersible latex powder in comparative example 4 is 5:1.
Comparative example 5
Comparative example 5 differs from example 3 only in that no crushed shale rock a was added to comparative example 5.
Comparative example 6
Comparative example 6 differs from example 3 only in that no crushed shale rock a was added in comparative example 6 and crushed shale rock B of the same mass as crushed shale rock a was added.
Performance test
Detection method/test method
1. Testing the water retention rate of the plastering mortar prepared in each embodiment and each proportion according to JGJ/T70-2009 building mortar basic performance test method standard;
2. carrying out viscosity tensile strength tests on the plastering mortar prepared in each example and each comparative example according to JGJ/T70-2009 building mortar basic performance test method standard;
results and analysis of results
Table 4: test results of examples 1 to 14 and comparative examples 1 to 6
It can be seen from the combination of examples 1 to 3 and comparative examples 5 to 6 and the combination of table 4 that the water retention rate of the plastering mortar can be obviously improved by adding the shale crushed stones, which indicates that the micro-nano pores on the shale crushed stones can absorb and store partial water for temporary storage, so that after the water in the micro-nano pores is mixed into the cement and is solidified, the micro-nano pores on the shale crushed stones can accommodate the gas between the plastering mortar and the wall, and the contact area between the plastering mortar and the wall can be increased. In addition, the shale crushed stones with small particle sizes have larger specific areas, so that more micro-nano pores can be possessed, and the water retention effect is better. Shale crushed stones with larger particle sizes have smaller specific surface areas, so the contact area with other substances in the plastering mortar is relatively small, and the bonding strength is reduced.
As can be seen by combining examples 1-7 and comparative examples 1-2 with Table 4, the addition of the reinforcing agent can enhance the water retention and the bonding tensile strength of the plastering mortar, and the weight ratio range of the reinforcing agent adopted in the application can achieve better effects. The polypropylene fiber and the polyacrylamide in the reinforcing agent both contain longer and higher-strength molecular chains, and meanwhile, the polypropylene fiber and the polyacrylamide have basic units with similar structures, and the polypropylene fiber and the polyacrylamide can be mutually adsorbed, crosslinked and form a net structure, so that the water retention effect can be achieved, the bonding tensile strength of the plastering mortar is greatly enhanced, and the plastering mortar is not easy to crack. When the weight ratio of the polypropylene fiber to the polyacrylamide in the reinforcing agent is 4:1, the reinforcing agent achieves the best effect on improving the water retention rate and the bonding tensile strength of the plastering mortar.
It can be seen from the combination of examples 8 to 11 and comparative examples 3 to 4 and from table 4 that the addition of the thickener significantly increases the adhesive tensile strength of the plastering mortar, and thus reduces the cracking resistance of the plastering mortar after setting. The methyl cellulose is added into the plastering mortar, so that the water retention capacity of the dry-mixed mortar can be enhanced, the strength of the plastering mortar after solidification can be enhanced, the emulsion formed after the redispersible latex powder is dispersed in water has high bonding capacity, the bonding strength of the methyl cellulose and the cement is further improved, and the bonding strength of the plastering mortar is further enhanced. When the ratio of the methyl cellulose to the redispersible latex powder is 7:3, the effect of the thickening agent on improving the bonding tensile strength of the plastering mortar is optimal.
With the combination of examples 12 to 13 and table 4, the addition of the fly ash can improve the water retention of the plastering mortar, but the material strength of the fly ash is low, and the excessive addition can result in low bonding strength of the plastering mortar.
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 (9)
1. The plastering mortar is characterized by comprising the following raw materials in parts by weight:
110 portions and 130 portions of cement;
30-50 parts of shale crushed stone;
350 portions and 380 portions of fine sand;
30-50 parts of water;
5-15 parts of a thickening agent;
10-20 parts of a reinforcing agent.
2. The plastering mortar of claim 1, wherein: the reinforcing agent comprises polypropylene fibers and polyacrylamide, and the weight ratio of the polypropylene fibers to the polyacrylamide is (10-13): (2-5).
3. The plastering mortar of claim 2, wherein: the weight ratio of the polypropylene fiber to the polyacrylamide is 4: 1.
4. the plastering mortar of claim 1, wherein: the thickening agent comprises methyl cellulose and redispersible latex powder, wherein the weight ratio of the methyl cellulose to the redispersible latex powder is (6-8): (2-4).
5. The plastering mortar of claim 4, wherein: the weight ratio of the methyl cellulose to the redispersible latex powder is 7: 3.
6. The plastering mortar of claim 1, wherein: the granularity of the shale crushed stone is 2mm or below 2 mm.
7. The plastering mortar of claim 1, wherein: also comprises 30-40 parts of fly ash.
8. A process for the preparation of a plastering mortar of any of claims 1 to 7, wherein: the method comprises the following steps:
step1, mixing cement, a thickening agent and a reinforcing agent to obtain a first-class mixture;
step2, mixing the primary mixture, fine sand and shale crushed stone to obtain a secondary mixture;
and Step3, mixing the secondary mixture with water to obtain the plastering mortar.
9. The preparation method of the plastering mortar of claim 8, wherein: and adding fly ash and fly ash to the Step2, and mixing the fly ash and the primary mixture, the fine sand and the shale crushed stone together.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111380923.0A CN113929400B (en) | 2021-11-20 | 2021-11-20 | Plastering mortar and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111380923.0A CN113929400B (en) | 2021-11-20 | 2021-11-20 | Plastering mortar and preparation method thereof |
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| CN113929400A true CN113929400A (en) | 2022-01-14 |
| CN113929400B CN113929400B (en) | 2022-08-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948289A (en) * | 2010-09-08 | 2011-01-19 | 深圳广田装饰集团股份有限公司 | Mortar for floating screed during building plastering construction and construction method thereof |
| CN102417335A (en) * | 2011-08-29 | 2012-04-18 | 李华荣 | Inorganic puffed fiber fireproof waterproof thermal insulation composite mud |
| US20160083295A1 (en) * | 2012-12-11 | 2016-03-24 | Fixit Ag | Thermally Insulating Aerogel Based Rendering Materials |
| CN106116332A (en) * | 2016-06-21 | 2016-11-16 | 浙江共创建材科技有限公司 | A kind of motar utilizing garbage to produce |
-
2021
- 2021-11-20 CN CN202111380923.0A patent/CN113929400B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948289A (en) * | 2010-09-08 | 2011-01-19 | 深圳广田装饰集团股份有限公司 | Mortar for floating screed during building plastering construction and construction method thereof |
| CN102417335A (en) * | 2011-08-29 | 2012-04-18 | 李华荣 | Inorganic puffed fiber fireproof waterproof thermal insulation composite mud |
| US20160083295A1 (en) * | 2012-12-11 | 2016-03-24 | Fixit Ag | Thermally Insulating Aerogel Based Rendering Materials |
| CN106116332A (en) * | 2016-06-21 | 2016-11-16 | 浙江共创建材科技有限公司 | A kind of motar utilizing garbage to produce |
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