CN111302724A - Dry-mixed plastering mortar and preparation method thereof - Google Patents
Dry-mixed plastering mortar and preparation method thereof Download PDFInfo
- Publication number
- CN111302724A CN111302724A CN201811513848.9A CN201811513848A CN111302724A CN 111302724 A CN111302724 A CN 111302724A CN 201811513848 A CN201811513848 A CN 201811513848A CN 111302724 A CN111302724 A CN 111302724A
- Authority
- CN
- China
- Prior art keywords
- parts
- dry
- plastering mortar
- mortar
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses dry-mixed plastering mortar and a preparation method thereof. The dry-mixed plastering mortar comprises the following components in parts by weight: 190 parts of cement, 10-30 parts of fly ash, 140 parts of machine-made coarse sand, 390 parts of machine-made fine sand, 370 parts of river sand and 320 parts of additive, wherein the cement is 150-20 parts; the preparation method comprises the following steps: drying the river sand until the water content is lower than 0.5%, uniformly mixing the river sand, the cement, the fly ash, the gypsum, the machine-made coarse sand and the machine-made fine sand, baking for 60-70min at 30-40 ℃, grinding for 10-20min, finally adding an air entraining agent, a water reducing agent and an additive, and uniformly mixing to obtain the dry-mixed plastering mortar. The dry-mixed plastering mortar has the advantages of high bonding strength and good heat conductivity; in addition, the preparation method has the advantages of simple steps, strong operability, high bonding strength of the prepared dry-mixed plastering mortar and good heat conductivity.
Description
Technical Field
The invention relates to the technical field of plastering mortar, in particular to dry-mixed plastering mortar and a preparation method thereof.
Background
With the continuous promotion of the innovation of building wall materials in China, a large number of novel wall materials are widely used, and a wall material structural system taking wall building blocks as a main factor is formed. The wall building block has strong water absorption and large shrinkage, the mixing water in the mortar is quickly absorbed by wall materials, the traditional plastering mortar has poor construction performance and water retention, low bonding strength, the problems of cracking, powder falling and the like, and the quality of a building can be seriously influenced, so the traditional plastering mortar can not meet the construction requirement of plastering the existing wall.
In the prior art, the chinese patent application publication No. CN103664091A discloses an anti-crack dry powder mortar special for light building blocks, which is composed of ordinary portland cement, fly ash, sierozem powder, fine building sand, hydrophobic metakaolin, polypropylene fibers, expanded perlite, bentonite, neopentyl glycol, sodium dodecyl benzene sulfonate, methyl cellulose, and the like.
The dry powder mortar has the disadvantages that; the mortar has poor heat-conducting property and bonding strength, and can cause temperature stress due to inconsistent internal and external temperatures in the hardening process, thereby causing large-area cracking and falling off of the surface of the wall plastering layer.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide the dry-mixed plastering mortar which has the advantages of high bonding strength and good heat conductivity.
The second purpose of the invention is to provide a preparation method of the dry-mixed plastering mortar, which has the advantages of simple steps, strong operability, high bonding strength of the prepared dry-mixed plastering mortar and good heat conductivity.
In order to achieve the first object, the invention provides the following technical scheme: the dry-mixed plastering mortar comprises the following components in parts by weight: 190 parts of cement, 10-30 parts of fly ash, 140 parts of machine-made coarse sand, 390 parts of machine-made fine sand, 370 parts of river sand and 320 parts of additive, wherein the cement is 150-20 parts;
the additive comprises the following components in parts by weight: 10-20 parts of silicon carbide, 5-10 parts of graphene, 10-20 parts of modified starch ether, 5-10 parts of polypropylene fiber, 10-15 parts of fatty acid salt, 10-20 parts of styrene and butadiene copolymer powder and 30-40 parts of 90-95% ethanol.
By adopting the technical scheme, as the fly ash is adopted to replace part of cement, the cost is saved, the fluidity and the water retention of the mortar are improved, the fly ash content is proper, the tensile strength and the bonding strength of the mortar can be improved, the machine-made fine sand and the machine-made coarse sand are matched with each other, and the machine-made fine sand is used for filling gaps between the machine-made coarse sand and the gaps between the raw materials, so that the surface of the mortar is smooth and compact after a plastering layer is formed; the additive is added into the mortar, so that the heat conductivity and the bonding strength of the mortar can be improved, graphene in the additive has good heat conductivity, the adhesion property and the heat conductivity of the mortar can be improved, the mortar is prevented from cracking and falling off due to inconsistent internal and external temperatures in the hardening process, silicon carbide is stable in chemical property, high in heat conductivity coefficient, small in thermal expansion coefficient and good in wear resistance, the heat conductivity of the mortar can be improved, the silicon carbide can be attached to the graphene to be agglomerated, the graphene is uniformly dispersed in the mortar, a fatty acid salt is added, the waterproof effect is good, insoluble calcium salt generated by the reaction of the fatty acid salt and calcium ions in a cement phase is deposited on the walls of capillaries to play a role in blocking holes, meanwhile, the tube walls of the capillaries are changed into hydrophobic surfaces, and therefore the waterproof effect is achieved, the styrene-butadiene copolymerized rubber powder can improve the water retention property of a fresh mixed mortar, The modified starch ether can increase the consistency of cement and fly ash, change the construction performance of mortar and improve the bonding strength of mortar for the bonding performance and the breaking and wear resistance of different base layers.
Further, the raw materials comprise the following components in parts by weight: 1600-180 parts of cement, 15-25 parts of fly ash, 110-130 parts of machine-made coarse sand, 380-400 parts of machine-made fine sand, 290-310 parts of river sand and 13-18 parts of additive.
By adopting the technical scheme, the usage amount of each raw material of the dry-mixed plastering mortar is accurate, and the dry-mixed plastering mortar with higher bonding strength and better heat conductivity can be prepared.
Further, the preparation method of the admixture comprises the following steps: stirring the graphene and the silicon carbide for 5-10min at the rotating speed of 500-600r/min, adding ethanol, grinding for 5-10min, drying, and uniformly mixing with modified starch ether, polypropylene fiber, fatty acid salt, styrene and butadiene copolymerized rubber powder to prepare the additive.
By adopting the technical scheme, the graphene and the silicon carbide are dissolved in the ethanol, so that the graphene can be prevented from being agglomerated, and the graphene is uniformly mixed.
Further, the modified starch ether is one or a composition of more of etherified modified starch S301, modified starch ether SB250 and modified starch ether SE-7.
By adopting the technical scheme, the etherified modified starch S301, the modified starch ether SB250 and the modified starch ether SE-7 can be matched with polypropylene fibers for use, so that the thickening effect is achieved, the internal structure is promoted, the mortar has good crack resistance and workability, the water retention performance is achieved, excessive evaporation of water and water absorption of a base layer are prevented, cracking is avoided, and the strength of the mortar is reduced.
Further, the diameter of the polypropylene fiber is 10-30 μm, and the length is 2-10 mm.
By adopting the technical scheme, the polypropylene fiber with the length of 2-10mm and the diameter of 10-30 mu m can be uniformly mixed in the additive and is tightly combined with raw materials such as cement, so that the formation and development of micro cracks are prevented, the mortar matrix is compact, and the mortar has waterproof performance and excellent impact resistance and crack resistance.
Furthermore, the grain diameter of the machine-made coarse sand is 2-3mm, and the fineness modulus of the machine-made fine sand is 0.7-1.5.
By adopting the technical scheme, the machine-made coarse sand and the machine-made fine sand are matched with each other, and the machine-made fine sand can enter the gap of the machine-made coarse sand, so that the mortar matrix is compact, and the surface is smooth when a plastering layer is manufactured.
Further, the raw materials also comprise 1-5 parts of water reducing agent, 0.5-1.0 part of air entraining agent and 1-5 parts of gypsum.
By adopting the technical scheme, the gypsum and the cement are matched with each other to form a composite gel system, the air entraining agent can introduce tiny bubbles into the mortar, and pores separated from each other are formed in the mortar, so that a capillary passage can be cut off, the capillary action is reduced, and the crack resistance of the mortar is improved.
Further, the air entraining agent is one or a composition of more of sodium dodecyl sulfate, triterpenoid saponin and natural nonionic tea saponin.
By adopting the technical scheme, the sodium dodecyl sulfate, the triterpenoid saponin and the natural non-ionic tea saponin can improve the cohesiveness of the mortar, and a large amount of uniformly distributed and stably closed micro bubbles are introduced in the mixing process of the mortar, so that the anti-cracking performance of the mortar is improved.
Further, the water reducing agent is a polycarboxylic acid high-performance water reducing agent.
By adopting the technical scheme, the polycarboxylate superplasticizer can reduce the cement consumption in the mortar, reduce the peak value of the temperature rise in the mortar caused by cement hydration heat and delay the time of the peak value, and when the mortar is cooled and shrunk, the tensile strength of the mortar is increased to a degree enough to resist the shrinkage stress of the mortar, so that the generation of cracks can be eliminated.
In order to achieve the second object, the invention provides the following technical scheme: a preparation method of dry-mixed plastering mortar comprises the following steps: drying the river sand until the water content is lower than 0.5%, uniformly mixing the river sand, the cement, the fly ash, the gypsum, the machine-made coarse sand and the machine-made fine sand, baking for 60-70min at 30-40 ℃, grinding for 10-20min, finally adding an air entraining agent, a water reducing agent and an additive, and uniformly mixing to obtain the dry-mixed plastering mortar.
By adopting the technical scheme, the river sand is dried at first, the water content in the river sand is reduced, the river sand, the cement, the fly ash, the gypsum, the machine-made coarse sand and the machine-made fine sand are baked, the water content in each raw material is reduced, the water retention rate of each raw material in use is improved, the particle size is reduced during grinding, the surface of a plastering layer made of the mortar is smooth, the bonding strength is high, the steps are simple, and the operability is strong.
In conclusion, the invention has the following beneficial effects:
firstly, as the admixture is added into the dry-mixed plastering mortar, and because the graphene and the silicon carbide in the admixture have higher heat conductivity coefficients, the heat conductivity of the mortar can be improved, the large-area cracking and falling of the surface of the wall plastering layer due to the inconsistent internal and external temperatures of the mortar can be prevented, and meanwhile, the silicon carbide can avoid the agglomeration of the graphene, so that the graphene is uniformly dispersed in the mortar, the heat conductivity effect of the graphene is improved, and the heat conductivity of the mortar is enhanced; and the styrene-butadiene copolymerized rubber powder and the modified starch ether in the additive can improve the bonding strength of the mortar and prevent the mortar from cracking and falling off after forming a plastering layer.
Secondly, the fatty acid salt is preferably added into the additive, the fatty acid salt can react with calcium ions in cement to generate insoluble calcium salt to block the capillary, so that the surface of the capillary is changed into hydrophobicity to play a waterproof role, the impermeability of a mortar plastering layer is improved, and the waterproof effect of the mortar plastering layer is better by matching the fatty acid salt with polypropylene fibers.
Thirdly, the etherified modified starch S301, the modified starch SB250 and the modified starch SE-7 are preferably used as the modified starch ethers, because the three components can be matched with the polypropylene fibers to play roles in thickening and promoting the internal structure, so that the mortar has good crack resistance and workability, and can be matched with fatty acid salts to improve the water retention property of the mortar, prevent excessive evaporation of water and water absorption of a base layer to crack and reduce the strength of the mortar.
Detailed Description
The present invention will be described in further detail with reference to examples.
Preparation examples 1 to 3 of admixtures
In preparation examples 1 to 3, the graphene is selected from the graphene with a product number of 1005 from Zhengzhou Yao Shunhua chemical Co., Ltd, the polypropylene fiber is selected from the polypropylene fiber with a product number of JBX008 sold by Ribo chemical Co., Ltd, Dacheng county, the silicon carbide is selected from the DFBT-T type silicon carbide micro powder sold by Baotong refractory Co., Ltd, the sodium fatty acid is selected from the JH type sodium fatty acid sold by Ningbo and New Material science and technology Co., Ltd, and the styrene and butadiene copolymerized rubber powder is selected from the SBR type redispersible emulsion powder sold by Shijiazhuan Xinyuan cellulose Co., Ltd.
Preparation example 1: according to the proportion in the table 1, 5kg of graphene and 10kg of silicon carbide are stirred for 5min at the rotating speed of 500r/min, 30kg of ethanol with the mass fraction of 90% is added, the mixture is ground for 5min until the particle size is 2mm, then the mixture is dried for 5min at the temperature of 50 ℃, and then the mixture is uniformly mixed with 10kg of modified starch ether, 5kg of polypropylene fiber, 10kg of fatty acid salt, 10kg of styrene and butadiene copolymerized rubber powder to prepare the additive, wherein the modified starch ether is etherified modified starch S301, the diameter of the polypropylene fiber is 10 mu m, the length of the polypropylene fiber is 2mm, and the fatty acid salt is sodium fatty acid.
TABLE 1 preparation examples 1 to 3 raw material ratios of additives
Preparation example 2: according to the proportion in the table 1, 8kg of graphene and 15kg of silicon carbide are stirred for 8min at the rotating speed of 550r/min, 35kg of ethanol with the mass fraction of 93% is added, the mixture is ground for 8min until the particle size is 2.3mm, the mixture is dried for 8min at the temperature of 55 ℃, and then the mixture is uniformly mixed with 15kg of modified starch ether, 8kg of polypropylene fiber, 13kg of fatty acid salt, 15kg of styrene and butadiene copolymerized rubber powder to prepare the additive, wherein the modified starch ether is modified starch ether SB250, the diameter of the polypropylene fiber is 20 microns, the length of the polypropylene fiber is 6mm, and the fatty acid salt is sodium fatty acid.
Preparation example 3: according to the proportion in the table 1, 10kg of graphene and 15kg of silicon carbide are stirred for 10min at the rotating speed of 600r/min, 40kg of ethanol with the mass fraction of 95% is added, the mixture is ground for 10min until the particle size is 2.5mm, then the mixture is dried for 10min at the temperature of 60 ℃, and then the mixture is uniformly mixed with 20kg of modified starch ether, 10kg of polypropylene fiber, 15kg of fatty acid salt, 20kg of styrene and butadiene copolymerized rubber powder to prepare the additive, wherein the modified starch ether is modified starch ether SE-7, the diameter of the polypropylene fiber is 30 mu m, the length of the polypropylene fiber is 10mm, and the fatty acid salt is sodium fatty acid.
Examples
In the following examples, river sand is selected from Lingshu county and Shunji mineral product processing factories, fly ash is selected from HY-0005 type fly ash sold by Lingshu county Huayao mineral product processing factories, gypsum is selected from 28095, plastering gypsum with the product number of 001 sold by Xinxuefeng building materials science and technology Limited of Zhou city, sodium dodecyl sulfonate is selected from sodium dodecyl sulfonate with the product number of 001 sold by Jinan Hainan chemical industry Limited, triterpenoid saponin is selected from LK-521 type triterpenoid saponin sold by Jinan Fei Van chemical industry Limited, natural nonionic tea saponin is selected from SN-8693 type tea saponin sold by xi' an Shennong biological science and technology Limited, and polycarboxylic acid high performance water reducing agent is selected from CK-H146 type polycarboxylic acid water reducing agent sold by Tianjin Gantan New Material science and technology Limited.
Example 1: a preparation method of dry-mixed plastering mortar comprises the following steps: according to the proportion in Table 2, river sand is dried until the water content is lower than 0.5%, then 280kg of river sand, 150kg of cement, 10kg of fly ash, 10kg of gypsum, 100kg of machine-made coarse sand and 370kg of machine-made fine sand are uniformly mixed, baked for 60min at 30 ℃, ground for 10min, finally 0.5kg of air entraining agent, 1kg of water reducing agent and 10kg of admixture are added and uniformly mixed, and the dry-mixed plastering mortar is obtained;
wherein the content of river sand is 0.8%, fineness modulus is 1.6, and apparent density is 2500kg/m3The cement is P.O42.5 cement, the fly ash is II-grade fly ash, the additive is prepared by the preparation example 1, the grain diameter of the machine-made coarse sand is 2mm, the fineness modulus of the machine-made fine sand is 0.7, the air entraining agent is sodium dodecyl sulfate, the water reducing agent is a polycarboxylic acid high-performance water reducing agent, the gypsum is industrial desulfurization gypsum, and the effective content is 93%.
TABLE 2 raw material ratios of dry-mixed plastering mortars of examples 1 to 5
Examples 2 to 5: the difference between the method for preparing the dry-mixed plastering mortar and the example 1 is that the raw material formulation of the dry-mixed plastering mortar is shown in Table 2.
Example 6: a preparation method of dry-mixed plastering mortar is different from that of the embodiment 1 in that the mortar is baked for 65min at 35 ℃ and ground for 15min, the mud content of river sand is 0.9 percent, the fineness modulus is 1.9, and the apparent density is 2550kg/m3The additive is prepared by preparation example 2, the grain diameter of the machine-made coarse sand is 2.5mm, the fineness modulus of the machine-made fine sand is 1.1, the air entraining agent is triterpenoid saponin, the gypsum is industrial desulfurized gypsum, and the effective content is 94%.
Example 7: a preparation method of dry-mixed plastering mortar is different from that of the embodiment 1 in that the mortar is baked for 70min at 40 ℃ and ground for 20min, the mud content of river sand is 1.0 percent, the fineness modulus is 2.2, and the apparent density is 2600kg/m3The additive is prepared by preparation example 3, the grain diameter of the machine-made coarse sand is 3mm, the fineness modulus of the machine-made fine sand is 1.5, and the air entraining agent is natural non-ionicThe product contains theasaponin, and Gypsum Fibrosum is industrial desulfurized Gypsum Fibrosum with effective content of 95%.
Comparative example
Comparative example 1: the difference between the preparation method of the dry-mixed plastering mortar and the embodiment 1 is that the admixture does not contain graphene.
Comparative example 2: a method for preparing a dry-mixed plastering mortar, which is different from the method in example 1 in that the admixture does not contain silicon carbide.
Comparative example 3: the difference between the preparation method of the dry-mixed plastering mortar and the embodiment 1 is that the additive does not contain fatty acid salt and styrene-butadiene copolymerized rubber powder.
Comparative example 4: a method for preparing a dry-mixed plastering mortar, which is different from the method in example 1 in that the admixture does not contain modified starch ether.
Comparative example 5: the difference between the preparation method of the dry-mixed plastering mortar and the embodiment 1 is that the admixture does not contain polypropylene fiber.
Performance test
The dry-mixed plastering mortar was prepared according to the shrinkage rates of 1 to 7 and the methods of comparative examples 1 to 5, and the properties were measured according to the following criteria, and the results are shown in Table 3:
1. detecting the compressive strength, the water retention rate, the tensile bonding strength, the shrinkage rate and the setting time of the mortar according to JGJ/T70 'Standard test method for basic Performance of building mortar', and taking performance indexes in GB/T25181-2010 'Ready-mixed mortar' as detection standard values;
2. testing the 2h consistency loss rate of the mortar according to appendix A thickness loss rate test method in GB/T25181-2010, and taking performance indexes in GB/T25181-2010 ready-mixed mortar as detection standard values;
3. measuring the thermal conductivity of the dry-mixed plastering mortar according to GB/T10297-1998 thermal conductivity measurement Hot wire method for non-metallic solid materials, and taking the technical requirement value in GB/T20473-2006 thermal insulation mortar for buildings as the detection standard value
TABLE 3 Performance testing of Dry-mix plastering mortars prepared in examples 1 to 7 and comparative examples 1 to 5
As can be seen from the data in Table 3, the test results of various properties of the dry-mixed plastering mortar prepared according to the examples 1 to 7 all meet the requirements of the industrial standard GB/T25181-2010 premixed mortar, the dry-mixed plastering mortar has excellent bonding strength with a base layer, can effectively prevent hollowing and dropping, has good thermal conductivity and shrinkage resistance, can effectively reduce cracks caused by temperature difference and mortar shrinkage, and has good strength, the 7d compressive strength is more than or equal to 22.5MPa, and the 28d compressive strength is more than or equal to 32.8 MPa.
In the comparative example 1, since graphene is not added in the additive, the 2-hour consistency loss rate of the dry-mixed plastering mortar is not greatly different from that of the example 1, but other performances such as compressive strength, shrinkage rate, water retention rate and the like are greatly different from those of the example 1, and the thermal conductivity coefficient is poor, so that the graphene can improve the thermal conductivity coefficient of the mortar, and the dry-mixed plastering mortar is prevented from falling off and cracking due to the internal and external temperature difference; in the comparative example 2, because no silicon carbide is added in the admixture, the dry-mixed plastering mortar has poor performances such as heat conductivity coefficient, tensile bonding strength and the like, and the silicon carbide can improve the heat conductivity and the bonding strength of the mortar and prevent the mortar from cracking; in comparative example 3, because the fatty acid salt and the styrene-butadiene copolymerized rubber powder are not added into the admixture, the compressive strength and the thermal conductivity of the dry-mixed plastering mortar are not greatly different from those of example 1, but the tensile bonding strength, the shrinkage rate, the water retention rate and other properties are poorer than those of example 1, which shows that the fatty acid salt and the styrene-butadiene copolymerized rubber powder can improve the bonding strength of the dry-mixed plastering mortar and improve the water retention property and the crack resistance of the mortar; comparative example 4 because the modified starch ether is not added in the admixture, the compressive strength and the thermal conductivity of the dry-mixed plastering mortar are smaller than those of the examples, but the tensile bonding strength, the water retention rate, the setting time and the like are larger than those of the example 1, which shows that the modified starch ether can improve the bonding strength of the mortar and prevent the mortar from cracking and falling off; in comparative example 5, as no polypropylene fiber is added into the admixture, compared with example 1, the dry-mixed plastering mortar has the advantages of reduced compressive strength, increased shrinkage rate, prolonged setting time, reduced tensile bonding strength and small difference of thermal conductivity coefficient, which shows that the polypropylene fiber can improve the compressive strength and the bonding strength of the dry-mixed plastering mortar and improve the water retention and crack resistance of the dry-mixed plastering mortar.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, 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 invention.
Claims (10)
1. The dry-mixed plastering mortar is characterized by comprising the following components in parts by weight: 190 parts of cement, 10-30 parts of fly ash, 140 parts of machine-made coarse sand, 390 parts of machine-made fine sand, 370 parts of river sand and 320 parts of additive, wherein the cement is 150-20 parts;
the additive comprises the following components in parts by weight: 10-20 parts of silicon carbide, 5-10 parts of graphene, 10-20 parts of modified starch ether, 5-10 parts of polypropylene fiber, 10-15 parts of fatty acid salt, 10-20 parts of styrene and butadiene copolymer powder and 30-40 parts of 90-95% ethanol.
2. The dry-mixed plastering mortar of claim 1, wherein the raw materials comprise, by weight: 1600-180 parts of cement, 15-25 parts of fly ash, 110-130 parts of machine-made coarse sand, 380-400 parts of machine-made fine sand, 290-310 parts of river sand and 13-18 parts of additive.
3. The dry-mixed plastering mortar of claim 1, wherein the admixture is prepared by the following steps: stirring the graphene and the silicon carbide for 5-10min at the rotating speed of 500-600r/min, adding ethanol, grinding for 5-10min, drying, and uniformly mixing with modified starch ether, polypropylene fiber, fatty acid salt, styrene and butadiene copolymerized rubber powder to prepare the additive.
4. The dry-mix plastering mortar of claim 3, wherein the modified starch ether is a combination of one or more of etherified modified starch S301, modified starch ether SB250 and modified starch ether SE-7.
5. The dry-mix plastering mortar of claim 3, wherein the polypropylene fibers have a diameter of 10 to 30 μm and a length of 2 to 10 mm.
6. The dry-mixed plastering mortar of claim 1 or 2, wherein the grain size of the machine-made coarse sand is 2 to 3mm, and the fineness modulus of the machine-made fine sand is 0.7 to 1.5.
7. The dry-mixed plastering mortar of claim 1 or 2, wherein the raw materials further comprise 1 to 5 parts of a water reducing agent, 0.5 to 1.0 part of an air entraining agent and 1 to 5 parts of gypsum.
8. The dry-mixed plastering mortar of claim 7, wherein the air entraining agent is one or a combination of sodium dodecyl sulfate, triterpenoid saponin and natural nonionic tea saponin.
9. The dry-mixed plastering mortar of claim 7, wherein the water reducing agent is a polycarboxylic acid high performance water reducing agent.
10. A method for preparing a dry-mix plastering mortar according to any of claims 1 to 9, comprising the steps of: drying the river sand until the water content is lower than 0.5%, uniformly mixing the river sand, the cement, the fly ash, the gypsum, the machine-made coarse sand and the machine-made fine sand, baking for 60-70min at 30-40 ℃, grinding for 10-20min, finally adding an air entraining agent, a water reducing agent and an additive, and uniformly mixing to obtain the dry-mixed plastering mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811513848.9A CN111302724A (en) | 2018-12-11 | 2018-12-11 | Dry-mixed plastering mortar and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811513848.9A CN111302724A (en) | 2018-12-11 | 2018-12-11 | Dry-mixed plastering mortar and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111302724A true CN111302724A (en) | 2020-06-19 |
Family
ID=71150547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811513848.9A Pending CN111302724A (en) | 2018-12-11 | 2018-12-11 | Dry-mixed plastering mortar and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111302724A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142430A (en) * | 2020-09-16 | 2020-12-29 | 贵州正和天筑科技有限公司 | Phosphogypsum exterior wall plastering mortar and preparation method thereof |
| CN112390605A (en) * | 2020-10-20 | 2021-02-23 | 长兴欧立亚新型建材有限公司 | Light moisture-proof sound-insulation plastering gypsum |
| CN113372083A (en) * | 2021-07-19 | 2021-09-10 | 福泉环保城发展有限公司 | Graphene oxide based layered material modified self-leveling mortar and preparation method thereof |
| CN113461381A (en) * | 2021-07-08 | 2021-10-01 | 北京科技大学 | Heat transfer enhanced SiC concrete and preparation method thereof |
| CN115286284A (en) * | 2022-08-23 | 2022-11-04 | 江苏蓝圈新材料股份有限公司 | Additive for improving strength and water resistance of mortar and preparation process thereof |
| CN115745494A (en) * | 2022-12-02 | 2023-03-07 | 振中建设集团有限公司 | Plastering mortar for crack resistance of house building |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050016422A1 (en) * | 2001-10-12 | 2005-01-27 | Isao Kamada | Mortar composition |
| CN104086141A (en) * | 2014-07-21 | 2014-10-08 | 俞权锋 | Architectural dry-mixing plastering mortar and preparation method thereof |
| CN105294012A (en) * | 2015-11-25 | 2016-02-03 | 诸暨市兆山天峰干混砂浆有限公司 | Anti-cracking-shedding and strong-adhesion dry mixing plastering mortar |
| CN105461272A (en) * | 2015-11-21 | 2016-04-06 | 诸暨市兆山天峰干混砂浆有限公司 | Dry-mixed waterproof mortar and preparation technology thereof |
| CN106348679A (en) * | 2016-08-22 | 2017-01-25 | 苏州麦奇新型材料有限公司 | Recycled-aggregate ready-mixed mortar |
-
2018
- 2018-12-11 CN CN201811513848.9A patent/CN111302724A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050016422A1 (en) * | 2001-10-12 | 2005-01-27 | Isao Kamada | Mortar composition |
| CN104086141A (en) * | 2014-07-21 | 2014-10-08 | 俞权锋 | Architectural dry-mixing plastering mortar and preparation method thereof |
| CN105461272A (en) * | 2015-11-21 | 2016-04-06 | 诸暨市兆山天峰干混砂浆有限公司 | Dry-mixed waterproof mortar and preparation technology thereof |
| CN105294012A (en) * | 2015-11-25 | 2016-02-03 | 诸暨市兆山天峰干混砂浆有限公司 | Anti-cracking-shedding and strong-adhesion dry mixing plastering mortar |
| CN106348679A (en) * | 2016-08-22 | 2017-01-25 | 苏州麦奇新型材料有限公司 | Recycled-aggregate ready-mixed mortar |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142430A (en) * | 2020-09-16 | 2020-12-29 | 贵州正和天筑科技有限公司 | Phosphogypsum exterior wall plastering mortar and preparation method thereof |
| CN112390605A (en) * | 2020-10-20 | 2021-02-23 | 长兴欧立亚新型建材有限公司 | Light moisture-proof sound-insulation plastering gypsum |
| CN113461381A (en) * | 2021-07-08 | 2021-10-01 | 北京科技大学 | Heat transfer enhanced SiC concrete and preparation method thereof |
| CN113372083A (en) * | 2021-07-19 | 2021-09-10 | 福泉环保城发展有限公司 | Graphene oxide based layered material modified self-leveling mortar and preparation method thereof |
| CN115286284A (en) * | 2022-08-23 | 2022-11-04 | 江苏蓝圈新材料股份有限公司 | Additive for improving strength and water resistance of mortar and preparation process thereof |
| CN115745494A (en) * | 2022-12-02 | 2023-03-07 | 振中建设集团有限公司 | Plastering mortar for crack resistance of house building |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111302724A (en) | Dry-mixed plastering mortar and preparation method thereof | |
| CN110395955B (en) | Anti-permeability and anti-freeze-thaw self-compacting concrete and preparation method thereof | |
| US9353008B2 (en) | Structural lightweight concrete or mortar, method for manufacturing same and use thereof as self-placing concrete | |
| CN108623239B (en) | Special mortar for aerated concrete | |
| CN109354463B (en) | Anti-seepage and anti-freezing C30 concrete and preparation method thereof | |
| CN113121173B (en) | Anti-crack concrete and preparation method thereof | |
| CN107777961B (en) | High-strength self-compacting concrete easy for super high-rise pumping | |
| Fu et al. | Preparation and characteristics of magnesium phosphate cement based porous materials | |
| CN111960782B (en) | Environment-friendly lightweight concrete prepared from waste sintered bricks and tiles and preparation method thereof | |
| CN111302723A (en) | Aerated concrete dry-mixed plastering mortar and preparation method thereof | |
| Saba et al. | Effect of recycled fine aggregates on performance of geopolymer masonry mortars | |
| Ma et al. | Shrinkage-reducing measures and mechanisms analysis for alkali-activated coal gangue-slag mortar at room temperature | |
| CN105541221A (en) | Novel energy-saving thermal insulation mortar and preparation method thereof | |
| CN110078431A (en) | Anti- isolation high-strength heat-insulating concrete of one kind and preparation method thereof | |
| CN102701705B (en) | Light high-strength masonry material for thin mortar joints and preparation method thereof | |
| Sui et al. | Study on the properties of high strength concrete using high belite cement | |
| CN113651586B (en) | Bottom layer plastering gypsum and preparation method thereof | |
| Wang et al. | Performance of alkali-activated cementitious composite mortar used for insulating walls | |
| CN108585698B (en) | Special joint filling mortar for light partition wall board | |
| JP2009084092A (en) | Mortar-based restoring material | |
| CN114163173A (en) | Lightweight concrete and preparation method thereof | |
| CN111533506A (en) | Anti-crack waterproof thermal insulation polymer mortar | |
| CN111875329A (en) | Plastering mortar prepared from phosphogypsum-based hydraulic composite cementing material and preparation thereof | |
| CN109516737B (en) | Seat paste and preparation method and application thereof | |
| CN110330298A (en) | Cement base fire coal clinker light mortar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200619 |
|
| RJ01 | Rejection of invention patent application after publication |