阅读说明：本技术 一种抹灰砂浆干粉及抹灰砂浆的制备方法 (Plastering mortar dry powder and preparation method of plastering mortar ) 是由 卢勇前 吴水娟 黄健 张锦红 于 2020-07-27 设计创作，主要内容包括：本申请涉及一种抹灰砂浆干粉及抹灰砂浆的制备方法,抹灰砂浆干粉包括以下组分：水泥80～120kg、砂800～820kg、掺合料60～80kg以及添加剂15～25kg,所述添加剂包括羟丙基甲基纤维素醚、α-烯基磺酸钠以及十二烷基月桂醇,其中,羟丙基甲基纤维素醚的添加量为0.2kg,α-烯基磺酸钠与十二烷基月桂醇的总添加量为羟丙基甲基纤维素醚添加量的0～4/50；抹灰砂浆的制备方法为：先对抹灰砂浆干粉进行搅拌,搅拌过程中缓慢添加纯化水,将抹灰砂浆干粉与纯化水拌合均匀,制得抹灰砂浆；纯化水的总添加量是抹灰砂浆总量的15%。本申请具有改善抹灰砂浆的保水性的效果。(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.)

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 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.

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: and when the viscosity of the hydroxypropyl methyl cellulose ether is 4-6 ten thousand mPa.s, the addition amount of the alpha-alkenyl sodium sulfonate and the dodecyl lauryl alcohol is 0.

4. The plastering mortar dry powder of claim 1, wherein: when the viscosity of the hydroxypropyl methyl cellulose ether is not less than 10 ten thousand mPa.s, the total adding amount of the alpha-alkenyl sodium sulfonate and the dodecyl lauryl alcohol is 1/50-4/50 of the adding amount of the hydroxypropyl methyl cellulose ether.

5. The plastering mortar dry powder of claim 1, wherein: the lauryl alcohol can be replaced by sodium lauryl sulfate.

6. The plastering mortar dry powder of claim 1, wherein: the admixture comprises the following components in parts by weight: 45-65 parts of fly ash and 30-60 parts of mineral powder.

7. 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.

8. The plastering mortar dry powder of claim 1, wherein: the blend also includes 5 parts of tetrahydrofuran acrylate and 3 parts of silicone amide.

9. 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.

10. 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 9, 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.

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.