CN111848003B - Plastering mortar dry powder and preparation method of plastering mortar - Google Patents

Plastering mortar dry powder and preparation method of plastering mortar Download PDF

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Publication number
CN111848003B
CN111848003B CN202010729173.2A CN202010729173A CN111848003B CN 111848003 B CN111848003 B CN 111848003B CN 202010729173 A CN202010729173 A CN 202010729173A CN 111848003 B CN111848003 B CN 111848003B
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plastering mortar
dry powder
plastering
mixture
methyl cellulose
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CN111848003A (en
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卢勇前
吴水娟
黄健
张锦红
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Suzhou Shunlin Mortar Co ltd
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Suzhou Shunlin Mortar Co ltd
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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
    • 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
    • C04B24/02—Alcohols; Phenols; Ethers
    • C04B24/026—Fatty alcohols
    • 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
    • C04B24/16—Sulfur-containing compounds
    • 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
    • C04B24/38—Polysaccharides or derivatives thereof
    • 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

Abstract

The application relates to a plastering mortar dry powder and a preparation method of plastering mortar, wherein the plastering mortar dry powder comprises the following components: 80-120 kg of cement, 800-820 kg of sand, 60-80 kg of admixture and 15-25 kg of additive, wherein the additive comprises hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol, the addition amount of the hydroxypropyl methyl cellulose ether is 0.2kg, and the total addition amount of the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol is 0-4/50 of the addition amount of the hydroxypropyl methyl cellulose ether; the preparation method of the plastering mortar comprises the following steps: firstly, stirring the plastering mortar dry powder, slowly adding purified water in the stirring process, and uniformly mixing the plastering mortar dry powder and the purified water to prepare plastering mortar; the total amount of purified water added is 15% of the total amount of the plastering mortar. This application has the effect of the water retention nature that improves the plastering mortar.

Description

Plastering mortar dry powder and preparation method of plastering mortar
Technical Field
The application relates to the technical field of building materials, in particular to plastering mortar dry powder and a preparation method of plastering mortar.
Background
The concrete wall surface constructed by the large formwork is smooth and flat, but the wall surface of the wall body constructed by the large formwork needs to be plastered and straightened at the joint of the longitudinal and transverse walls, the joint of the upper and lower layers of the staircase, the opening of the door and the window and the like. Plastering refers to a surface course engineering of uniformly coating cement mortar on a wall surface after mixing and stirring dry cement mortar powder and clear water according to a certain proportion to form the cement mortar. The plastering work of the indoor and outdoor wall is a work after the construction of the building structure is finished, and the scientific plastering work can play the functions of moisture prevention, weathering prevention, heat insulation and the like, thereby preventing the wall body of the building from being eroded by wind, rain, snow and the like. The dry cement mortar powders used for wall plastering are generally referred to as plastering mortar dry powders.
The plastering mortar mixture prepared by mixing the existing plastering mortar dry powder with water generally has the problems of poor water retention, mortar with poor water retention, easy occurrence of bleeding, slurry flowing and the like in the use process, reduced plastering uniformity and reduced caking property of the mortar and a substrate, and seriously influences the construction performance of the mortar in plastering.
Disclosure of Invention
In order to improve the water retention of the plastering mortar, the application provides a plastering mortar dry powder and a preparation method of the plastering mortar.
In a first aspect, the present application provides a plastering mortar dry powder, which adopts the following technical scheme:
the plastering mortar dry powder comprises the following components: 80-120 kg of cement, 800-820 kg of sand, 60-80 kg of admixture and 15-25 kg of additive, wherein the additive comprises hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol, the addition amount of the hydroxypropyl methyl cellulose ether is 0.2kg, and the total addition amount of the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol is 0-4/50 of the addition amount of the hydroxypropyl methyl cellulose ether.
By adopting the technical scheme, the hydroxypropyl methyl cellulose ether has certain cohesiveness and water retention property, so that the water retention property of the mortar is enhanced, the adhesion between the mortar and a base material during plastering is improved, and the construction difficulty is reduced; the alpha-sodium alkenyl sulfonate has good dispersibility, the dodecyl lauryl alcohol has good low temperature resistance, and both the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol have the effect of improving the surface activity of cement. The alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol have an auxiliary synergistic effect on the hydroxypropyl methyl cellulose ether, and the synergistic cooperation of the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol is favorable for improving the water retention property and the adhesion of the plastering mortar, so that the uniformity and the construction performance of the plastering mortar during smearing are improved.
Preferably, the mass ratio of the sodium alpha-alkenyl sulfonate to the lauryl alcohol is 1: (0.5 to 1.5).
By adopting the technical scheme, the mass ratio of the alpha-sodium alkenyl sulfonate to the dodecyl lauryl alcohol is controlled within a proper range, so that the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol are ensured to have the optimal auxiliary synergistic effect and synergistic effect.
Preferably, when the viscosity of the hydroxypropyl methyl cellulose ether is 4 to 6 ten thousand mPa · s, the addition amount of the sodium alpha-alkenyl sulfonate and the dodecyl lauryl alcohol is 0.
By adopting the technical scheme, when the hydroxypropyl methyl cellulose ether with the viscosity of 4-6 ten thousand mPa & s is selected, the mortar has good water-retaining property and construction performance, and at the moment, in order to save cost, the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol can not be added.
Preferably, when the viscosity of the hydroxypropyl methyl cellulose ether is not less than 10 ten thousand mPa.s, the total adding amount of the sodium alpha-alkenyl sulfonate and the dodecyl lauryl alcohol is 1/50-4/50 of the adding amount of the hydroxypropyl methyl cellulose ether.
By adopting the technical scheme, when the hydroxypropyl methyl cellulose ether with the viscosity of more than 10 ten thousand mPa & s is selected, in order to control the water retention property and the anti-flowing property of the mortar, the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol are required to be added, and when the total amount of the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol is 1/50-4/50, the auxiliary synergistic effect is better.
Preferably, the lauryl alcohol can be replaced with sodium lauryl sulfate.
By adopting the technical scheme, the lauryl sodium sulfate is a downstream product of lauryl alcohol, has good emulsibility, water solubility, acid and alkali resistance, hard water resistance and stability, can also be used for synergically enhancing hydroxypropyl methyl cellulose ether with the alpha-alkenyl sodium sulfonate, is low in price and low in purchase cost, and can be used for replacing the lauryl alcohol.
Preferably, the admixture comprises the following components in parts by weight: 45-65 parts of fly ash and 30-60 parts of mineral powder.
By adopting the technical scheme, the fly ash is easy to adhere to honeycomb-shaped composite particles with rough surfaces and more edges and corners during calcination preparation, and the fine-grained mineral powder can be filled in gaps of the fly ash to make up for the defect of high porosity of part of the fly ash, so that the compaction degree of the mortar is improved, the water retention performance of the mortar is improved, and the construction performance of the mortar during subsequent plastering is improved.
Preferably, the admixture further comprises 20 parts of diatomite and 15 parts of oxide-based metal ceramic micro powder.
By adopting the technical scheme, the diatomite is made of amorphous SiO2The diatomite is soft, porous and high in viscosity, has good permeability, and can penetrate into the base material to improve the adhesion between the base material and plastering mortar and improve the construction performance of the mortar. The metal oxide ceramic micro powder has the toughness and the bending resistance of ceramic, has the high temperature resistance, the high strength and the oxidation resistance of metal, can be cooperatively matched with diatomite to make up the defect of insufficient mortar strength caused by the soft quality of the diatomite so as to improve the construction performance of the mortar.
Preferably, the blend further comprises 5 parts of tetrahydrofuran acrylate and 3 parts of silicone amide.
By adopting the technical scheme, the tetrahydrofuran acrylate improves the adhesion of the plastering mortar to the base material through strong permeability; the silicone amide improves the adhesion of the mortar mixture by improving the dispersion uniformity of each component particle in the plastering mortar, improving the air hole structure in the plastering mortar and reducing the cross holes; the tetrahydrofuran acrylate and the silicone amide are compounded for use, play a certain synergistic effect, and jointly improve the adhesion of the plastering mortar to a base material, thereby improving the construction performance.
Preferably, the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding an admixture to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 300-500 rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
By adopting the technical scheme, the components in the additive are premixed, so that the hydroxypropyl methyl cellulose ether, the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol are uniformly mixed, and then the additive is blended with other components, so that the blending uniformity among the components is improved, the component agglomeration condition is reduced, the blending uniformity of the prepared plastering mortar is improved, and the construction performance is ensured.
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 steps of firstly stirring plastering mortar dry powder, slowly adding purified water during stirring, and uniformly mixing the plastering mortar dry powder and the purified water to prepare the plastering mortar; the total amount of purified water added is 15% of the total amount of the plastering mortar.
By adopting the technical scheme, the total adding amount of the purified water is controlled to ensure that the prepared plastering mortar has good water retention and fluidity resistance, so that the construction performance of the plastering mortar is ensured.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol have an auxiliary synergistic effect on the hydroxypropyl methyl cellulose ether, and the synergistic cooperation of the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol is favorable for improving the water retention property and the adhesion of the plastering mortar, so that the uniformity and the construction performance of the plastering mortar during smearing are improved;
2. when the hydroxypropyl methyl cellulose ether with the viscosity of 4-6 ten thousand mPa & s is selected, the mortar has good water-retaining property and construction performance, and at the moment, in order to save cost, the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol can not be added;
3. when the hydroxypropyl methyl cellulose ether with the viscosity of more than 10 ten thousand mPa & s is selected, in order to control the water retention property and the anti-flowing property of the mortar, the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol need to be added, and when the total amount of the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol is 1/50-4/50, the auxiliary synergistic effect is better.
Detailed Description
The embodiment of the application discloses plastering mortar dry powder and a preparation method of plastering mortar.
Example 1
The plastering mortar dry powder comprises the following components:
Figure BDA0002602334410000031
Figure BDA0002602334410000041
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash and mineral powder to prepare a mixture 2; 3) mixing the mixture 1 and the mixture 2 at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder;
the preparation method of the plastering mortar comprises the following steps: firstly, stirring the plastering mortar dry powder, slowly adding purified water during stirring, and uniformly mixing the plastering mortar dry powder and the purified water to prepare plastering mortar; the total amount of purified water added is 15% of the total amount of the plastering mortar.
Example 2
The plastering mortar dry powder comprises the following components:
Figure BDA0002602334410000042
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash and mineral powder to prepare a mixture 2; 3) mixing the mixture 1 and the mixture 2 at the mixing speed of 300rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder;
the preparation method of the plastering mortar comprises the following steps: firstly, stirring the plastering mortar dry powder, slowly adding purified water during stirring, and uniformly mixing the plastering mortar dry powder and the purified water to prepare plastering mortar; the total amount of purified water added is 15% of the total amount of the plastering mortar.
Example 3
The plastering mortar dry powder comprises the following components:
Figure BDA0002602334410000051
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash and mineral powder to prepare a mixture 2; 3) mixing the mixture 1 and the mixture 2 at a mixing speed of 500rpm to obtain a finished product of plastering mortar dry powder after uniform mixing;
the preparation method of the plastering mortar comprises the following steps: firstly, stirring the plastering mortar dry powder, slowly adding purified water during stirring, and uniformly mixing the plastering mortar dry powder and the purified water to prepare plastering mortar; the total amount of purified water added is 15% of the total amount of the plastering mortar.
Example 4
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000052
the preparation method of the plastering mortar dry powder comprises the following steps: 1) firstly, uniformly mixing cement and sand, and then adding fly ash and mineral powder to prepare a mixture; 3) and (3) mixing the mixture with 4 ten thousand viscosity hydroxypropyl methyl cellulose ether at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 5
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000053
Figure BDA0002602334410000061
the preparation method of the plastering mortar dry powder comprises the following steps: 1) firstly, uniformly mixing cement and sand, and then adding fly ash and mineral powder to prepare a mixture; 3) and (3) mixing the mixture with 4 ten thousand viscosity hydroxypropyl methyl cellulose ether at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 6
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000062
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash, mineral powder, diatomite and oxide-based metal ceramic micro powder to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 7
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000063
Figure BDA0002602334410000071
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash, mineral powder, tetrahydrofuran acrylate and silicone amide to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 8
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000072
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash, mineral powder, diatomite, oxide-based metal ceramic micro powder, tetrahydrofuran acrylate and silicone amide to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 9
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000081
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash, mineral powder and diatomite to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 10
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000082
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash, mineral powder and oxide-based metal ceramic micro powder to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 11
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000091
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash, mineral powder and tetrahydrofuran acrylate to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 12
The present embodiment is different from embodiment 1 in that:
Figure BDA0002602334410000092
the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding fly ash, mineral powder and silicone amide to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
Example 13
The present embodiment is different from embodiment 1 in that:
the total amount of purified water added is 12% of the total amount of the plastering mortar.
Example 14
The present embodiment is different from embodiment 1 in that:
the total amount of purified water added is 18% of the total amount of the plastering mortar.
Comparative example 1
The plastering mortar dry powder comprises the following components:
Figure BDA0002602334410000101
the preparation method of the plastering mortar dry powder comprises the following steps: 1) firstly, uniformly mixing cement and sand, and then adding fly ash and mineral powder to prepare a mixture; 3) mixing the mixture with 10 ten thousand viscosity hydroxypropyl methyl cellulose ether at the mixing speed of 400rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder;
the preparation method of the plastering mortar comprises the following steps: firstly, stirring the plastering mortar dry powder, slowly adding purified water during stirring, and uniformly mixing the plastering mortar dry powder and the purified water to prepare plastering mortar; the total amount of purified water added is 15% of the total amount of the plastering mortar.
Comparative example 2
The plastering mortar dry powder comprises the following components:
Figure BDA0002602334410000102
the preparation method of the plastering mortar dry powder comprises the following steps: uniformly mixing cement and sand, adding fly ash and mineral powder, uniformly mixing at the mixing speed of 400rpm to obtain a finished product of plastering mortar dry powder;
the preparation method of the plastering mortar comprises the following steps: firstly, stirring the plastering mortar dry powder, slowly adding purified water during stirring, and uniformly mixing the plastering mortar dry powder and the purified water to prepare plastering mortar; the total amount of purified water added is 15% of the total amount of the plastering mortar.
Performance test
1. Detection of water retention performance of plastering mortar
The test was carried out according to GB/T3183-2003 and the results are reported in Table 1.
TABLE 1
Test specimen Water retention rate/%)
Example 1 93.1
Example 2 92.9
Example 3 92.8
Example 4 92.7
Example 5 92.4
Example 6 94.4
Example 7 94.2
Example 8 94.8
Example 9 93.5
Example 10 93.9
Example 11 93.7
Examples12 93.6
Example 13 92.1
Example 14 92.2
Comparative example 1 87.2
Comparative example 2 84.3
2. Detection of adhesion performance of plastering mortar
1) Test subjects: taking the plastering mortar prepared in examples 1-14 and comparative examples 1-2 as samples, wherein the initial weight of each group of samples is equal; taking 16 parts of base material with the surface similar to the bottom surface of plastering as a smearing object, and weighing the initial weight of the base material;
2) the test method comprises the following steps: coating each group of samples on the surface of each vertically placed base material in the same coating mode, observing the flatness of the surface of the base material after twice coating, and recording the weight of the base material after standing for 2 hours;
3) and (3) test results: the substrate surface flatness is recorded in table 2; subtracting the initial weight of the base material from the total weight of the base material coated with the plastering mortar, namely the residual amount of the plastering mortar on the surface of the base material, dividing the residual amount by the initial weight of the plastering mortar to obtain the residual rate of the plastering mortar on the surface of the base material, representing the adhesion performance of the plastering mortar by using the residual rate, wherein the larger the residual rate is, the stronger the adhesion of the plastering mortar is, and recording the residual rate in table 2.
TABLE 2
Figure BDA0002602334410000111
Figure BDA0002602334410000121
3. Analysis of test results
As can be seen from the detection data in tables 1 and 2:
1. in examples 1-5, the addition amount of each component is changed, so that the plastering mortar can keep good water retention and adhesion performance; in the examples 4 and 5, other additives are not added under the condition that 4 ten thousand viscosity hydroxypropyl methyl cellulose ether and 6 ten thousand viscosity hydroxypropyl methyl cellulose ether are used, the performance of the plastering mortar is good, and the production cost is reduced;
2. examples 6-12 both the water retention and adhesion of the plastering mortar were altered to some extent according to the added components of the admixture. In examples 9 to 12, the water retention and adhesion of the plastering mortar are improved to some extent, especially the adhesion is improved to a greater extent, compared with the case of not adding the four components, by separately adding the diatomite, the oxide-based cermet micropowder, the tetrahydrofuran acrylate and the silicone amide into the plastering mortar dry powder system. In examples 6 to 7, the diatomite and the oxide-based metal ceramic micro powder or the tetrahydrofuran acrylate and the silicone amide are added simultaneously, so that the effects of improving the water retention and the adhesion of the plastering mortar are more remarkable compared with those of examples 9 to 12, and it is shown that the two components added simultaneously have a synergistic effect, and the improvement of the workability of the plastering mortar is facilitated. Example 8 is a plastering mortar system to which diatomaceous earth, oxide-based cermet fine powder, tetrahydrofuran acrylate, and silicone amide are added at the same time, and the improvement effect on the water retention property and the adhesion of the plastering mortar is most remarkable, and the system is the best example among a plurality of groups of examples, and the plastering mortar has the best construction performance;
3. examples 13 to 14 were carried out while changing the amount of purified water to be added, and it was found from the test data that when the amount of purified water is too large or too small, the water retentivity and adhesion of the plastering mortar are lowered, and therefore, the amount of purified water to be added is controlled to an appropriate value; 4. comparative example 1 is that under the condition of adding 10 ten thousand viscosity hydroxypropyl methyl cellulose ether, other additives are not added, but the water retention and the adhesion of the plastering mortar are obviously reduced compared with example 1, which shows that when 10 ten thousand viscosity hydroxypropyl methyl cellulose ether is used, the water retention and the adhesion of the plastering mortar can be obviously improved by adding the alpha-alkenyl sodium sulfonate and the dodecyl lauryl alcohol, so that the construction performance of the plastering mortar is improved;
5. comparative example 2 is that hydroxypropyl methyl cellulose ether, sodium alpha-alkenyl sulfonate and lauryl alcohol are not added, the water retention and the adhesion of the plastering mortar are greatly reduced, which shows that the additive has a remarkable promoting effect on improving the construction performance of the plastering mortar.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (7)

1. The plastering mortar dry powder comprises the following components: 80-120 kg of cement, 800-820 kg of sand, 60-80 kg of admixture and 15-25 kg of additive, wherein the additive comprises hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol, the viscosity of the hydroxypropyl methyl cellulose ether is not less than 10 ten thousand mPa.s, and the total adding amount of the alpha-sodium alkenyl sulfonate and the dodecyl lauryl alcohol is 1/50-4/50 of the adding amount of the hydroxypropyl methyl cellulose ether; the admixture comprises the following components in parts by weight: 45-65 parts of fly ash and 30-60 parts of mineral powder.
2. The plastering mortar dry powder of claim 1, wherein: the mass ratio of the alpha-sodium alkenyl sulfonate to the dodecyl lauryl alcohol is 1: (0.5 to 1.5).
3. The plastering mortar dry powder of claim 1, wherein: the lauryl alcohol can be replaced by sodium lauryl sulfate.
4. The plastering mortar dry powder of claim 1, wherein: the admixture further comprises 20 parts of diatomite and 15 parts of oxide-based metal ceramic micro powder.
5. The plastering mortar dry powder of claim 1, wherein: the admixture further comprises 5 parts of tetrahydrofuran acrylate and 3 parts of silicone amide.
6. The plastering mortar dry powder of claim 1, wherein: the preparation method of the plastering mortar dry powder comprises the following steps: 1) premixing hydroxypropyl methyl cellulose ether, alpha-sodium alkenyl sulfonate and dodecyl lauryl alcohol to prepare a mixture 1; 2) firstly, uniformly mixing cement and sand, and then adding an admixture to prepare a mixture 2; 3) and mixing the mixture 1 and the mixture 2 at the mixing speed of 300-500 rpm, and uniformly mixing to obtain a finished product of plastering mortar dry powder.
7. A preparation method of plastering mortar is characterized by comprising the following steps: firstly stirring the plastering mortar dry powder of any one of claims 1 to 6, slowly adding purified water during stirring, and uniformly mixing the plastering mortar dry powder and the purified water to prepare plastering mortar; the total amount of purified water added is 15% of the total amount of the plastering mortar.
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