阅读说明：本技术 一种建筑用预拌砂浆混合料及其制备方法 (Premixed mortar mixture for building and preparation method thereof ) 是由 张耀 刘晓潇 于 2021-09-12 设计创作，主要内容包括：本发明提供一种建筑用预拌砂浆混合料及其制备方法,涉及建筑材料技术领域。该筑用预拌砂浆混合料,包括以下重量份的原料：水泥10-15份、烧结砖粉20-25份、粉煤灰10-14份、石英砂50-55份、碎石粉20-25份、混凝土外加剂1-2份、水20-30份、保水增稠剂10-15份。通过同时添加混凝土外加剂、保水增稠剂使砂浆混合料具有保水性、触变润滑性、分散悬浮性,满足砂浆的施工性能,使预拌砂浆混合料具有耐长时间存储运输,且强度高、收缩率低的特点,解决了建筑垃圾处理的难题,工艺步骤简单,绿色环保且降低了砂浆生产成本。(The invention provides a ready-mixed mortar mixture for buildings and a preparation method thereof, relating to the technical field of building materials. The ready-mixed mortar mixture for construction comprises the following raw materials in parts by weight: 10-15 parts of cement, 20-25 parts of sintered brick powder, 10-14 parts of fly ash, 50-55 parts of quartz sand, 20-25 parts of broken stone powder, 1-2 parts of concrete admixture, 20-30 parts of water and 10-15 parts of water retention thickener. The concrete admixture and the water-retention thickener are added simultaneously, so that the mortar mixture has water retention, thixotropic lubricity and dispersion suspension property, the construction performance of the mortar is met, the premixed mortar mixture has the characteristics of long-time storage and transportation resistance, high strength and low shrinkage rate, the problem of treatment of construction waste is solved, the process steps are simple, the environment is protected, and the production cost of the mortar is reduced.)

1. The ready-mixed mortar mixture for the building is characterized in that: the feed comprises the following raw materials in parts by weight: 10-15 parts of cement, 20-25 parts of sintered brick powder, 10-14 parts of fly ash, 50-55 parts of quartz sand, 20-25 parts of broken stone powder, 1-2 parts of concrete admixture, 20-30 parts of water and 10-15 parts of water retention thickener.

2. The ready-mixed mortar mixture for construction according to claim 1, wherein: the water-retaining thickener comprises the following raw materials in percentage by mass: 30-40% of bentonite, 10-15% of kaolin, 8-10% of sepiolite, 10-15% of zeolite powder, 0.5-1.5% of hydroxypropyl methyl cellulose ether, 20-30% of phosphorous slag powder and 2-3% of lignosulfonate.

3. The ready-mixed mortar mixture for construction according to claim 1, wherein: the concrete admixture comprises the following raw materials in percentage by mass: 60-65% of polycarboxylic acid water reducing agent, 25-30% of cellulose grafted chitosan, 6-9% of silane coupling agent, 2-3% of polyvinylpyrrolidone and 0.5-1.5% of silicon carbide.

4. The preparation method of the ready-mixed mortar mixture for buildings according to claim 1, which is characterized by comprising the following steps: the method comprises the following steps:

s1, taking the following raw materials in parts by weight: 10-15 parts of cement, 20-25 parts of sintered brick powder, 10-14 parts of fly ash, 50-55 parts of quartz sand, 20-25 parts of broken stone powder, 1-2 parts of concrete admixture, 20-30 parts of water and 10-15 parts of water retention thickener;

s2, pouring the water, the residual pipe pile paddles, the concrete admixture and the water retention thickening agent in the step S1 into a stirrer in sequence, and stirring for 4-5 minutes in a clockwise direction at the rotating speed of 60-70r/min to obtain a mixture A;

s3, sequentially pouring the cement and the fly ash obtained in the step S1 into the mixture A, stirring at the rotating speed of 50-55r/min for 4-5 minutes in the anticlockwise direction to obtain a mixture B;

and S4, sequentially pouring the quartz sand and the crushed stone powder in the step S1 into the mixture B, stirring the mixture B clockwise for 5 to 6 minutes at the rotation speed of 60 to 70r/min by using a stirrer, and then stirring the mixture C anticlockwise for 8 to 10 minutes to obtain the ready-mixed mortar mixture.

5. The preparation method of the ready-mixed mortar mixture for buildings according to claim 2, which is characterized by comprising the following steps: the preparation method of the water-retaining thickener comprises the following steps:

(1) weighing bentonite, kaolin, sepiolite, zeolite powder and lignosulfonate according to the mass percentage, and carrying out baking intervention treatment;

(2) premixing the bentonite, kaolin, sepiolite, zeolite powder and lignosulfonate obtained in the step (1), and grinding in a grinding machine, wherein the particle size of the particles is 200-300 meshes;

(3) and (3) weighing the phosphorus slag powder, the hydroxypropyl methyl cellulose ether and the raw materials obtained by grinding in the step (2) according to the mass percentage, adding into a mixer, and mixing for 4-5min to obtain the water-retaining thickener.

6. The preparation method of the ready-mixed mortar mixture for buildings according to claim 3, which is characterized by comprising the following steps: the preparation method of the concrete admixture comprises the following steps:

(1) weighing a polycarboxylic water reducer, cellulose grafted chitosan, a silane coupling agent, polyvinylpyrrolidone and silicon carbide according to the mass percentage;

(2) and (2) adding the raw materials in the step (1) into a mixing stirrer to be mixed for 2-3min to obtain the concrete admixture.

Technical Field

The invention relates to the field of building materials, in particular to a ready-mixed mortar mixture for buildings and a preparation method thereof.

Background

In recent years, some large cities in China have started to push ready-mixed mortar, the production and use of the ready-mixed mortar meet the development requirements of the social of circular economy and resource conservation, the industrial production is realized, the stability of quality is ensured from the source, and the method has the advantages of good operability, little field pollution, effective improvement of engineering progress and the like. The concrete admixture is a chemical substance which is added in the process of stirring concrete and accounts for less than 5 percent of the mass of cement, can obviously improve the performance of the concrete, has the characteristics of multiple varieties, small addition amount, great influence on the performance of the concrete, low investment, quick response and obvious technical and economic benefits, and is increasingly applied along with the continuous progress of science and technology. The wet-mixed mortar contains all raw materials after being mixed, and can be constructed after being conveyed to a construction site, so that the dust can be effectively controlled in the production, manufacturing and construction processes, water is not required to be added to the processing site for mixing, the uniformity of the performance of the mortar product is easier to control, and the wet-mixed mortar has more advantages in the aspects of controlling the dust and maintaining the design ratio of the mortar product compared with dry-mixed mortar.

In the actual production process, the construction site is often far away from the mortar mixing site, so that how to ensure that the wet-mixed mortar can still keep good construction performance after long-distance transportation is required to be considered in the production of the wet-mixed mortar, and how to develop the wet-mixed mortar which is resistant to long-time storage and transportation, high in strength and low in shrinkage rate is required to be solved in the industry.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a ready-mixed mortar mixture for buildings and a preparation method thereof, and solves the problem that the existing mortar is not beneficial to storage and transportation.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the ready-mixed mortar mixture for the building comprises the following raw materials in parts by weight: 10-15 parts of cement, 20-25 parts of sintered brick powder, 10-14 parts of fly ash, 50-55 parts of quartz sand, 20-25 parts of broken stone powder, 1-2 parts of concrete admixture, 20-30 parts of water and 10-15 parts of water retention thickener.

Preferably, the water-retaining thickener comprises the following raw materials in percentage by mass: 30-40% of bentonite, 10-15% of kaolin, 8-10% of sepiolite, 10-15% of zeolite powder, 0.5-1.5% of hydroxypropyl methyl cellulose ether, 20-30% of phosphorous slag powder and 2-3% of lignosulfonate.

Preferably, the concrete admixture comprises the following raw materials in percentage by mass: 60-65% of polycarboxylic acid water reducing agent, 25-30% of cellulose grafted chitosan, 6-9% of silane coupling agent, 2-3% of polyvinylpyrrolidone and 0.5-1.5% of silicon carbide.

Preferably, the preparation method of the ready-mixed mortar mixture for buildings comprises the following steps:

s1, taking the following raw materials in parts by weight: 10-15 parts of cement, 20-25 parts of sintered brick powder, 10-14 parts of fly ash, 50-55 parts of quartz sand, 20-25 parts of broken stone powder, 1-2 parts of concrete admixture, 20-30 parts of water and 10-15 parts of water retention thickener;

s2, pouring the water, the residual pipe pile paddles, the concrete admixture and the water retention thickening agent in the step S1 into a stirrer in sequence, and stirring for 4-5 minutes in a clockwise direction at the rotating speed of 60-70r/min to obtain a mixture A;

s3, sequentially pouring the cement and the fly ash obtained in the step S1 into the mixture A, stirring at the rotating speed of 50-55r/min for 4-5 minutes in the anticlockwise direction to obtain a mixture B;

and S4, sequentially pouring the quartz sand and the crushed stone powder in the step S1 into the mixture B, stirring the mixture B clockwise for 5 to 6 minutes at the rotation speed of 60 to 70r/min by using a stirrer, and then stirring the mixture C anticlockwise for 8 to 10 minutes to obtain the ready-mixed mortar mixture.

Preferably, the preparation method of the water-retaining thickener comprises the following steps:

(1) weighing bentonite, kaolin, sepiolite, zeolite powder and lignosulfonate according to the mass percentage, and carrying out baking intervention treatment;

(2) premixing the bentonite, kaolin, sepiolite, zeolite powder and lignosulfonate obtained in the step (1), and grinding in a grinding machine, wherein the particle size of the particles is 200-300 meshes;

(3) and (3) weighing the phosphorus slag powder, the hydroxypropyl methyl cellulose ether and the raw materials obtained by grinding in the step (2) according to the mass percentage, adding into a mixer, and mixing for 4-5min to obtain the water-retaining thickener.

Preferably, the preparation method of the concrete admixture comprises the following steps:

(1) weighing a polycarboxylic water reducer, cellulose grafted chitosan, a silane coupling agent, polyvinylpyrrolidone and silicon carbide according to the mass percentage;

(2) and (2) adding the raw materials in the step (1) into a mixing stirrer to be mixed for 2-3min to obtain the concrete admixture.

(III) advantageous effects

The invention provides a ready-mixed mortar mixture for buildings and a preparation method thereof. The method has the following beneficial effects:

1. according to the invention, the concrete admixture and the water-retention thickener are added simultaneously, so that the mortar mixture has water retention property, thixotropic lubricity and dispersion suspension property, the slurry viscosity is increased, the mortar has good colloid property, the water retention property of fresh mortar can be greatly improved, the mortar is prevented from being isolated, the mortar is prevented from cracking due to too fast dispersion of the mortar water, the construction performance of the mortar is met, and the premixed mortar mixture has the characteristics of long-time storage and transportation resistance, high strength and low shrinkage rate.

2. According to the invention, the building waste sintered brick powder is fully utilized, the waste of the building waste is effectively changed into valuable, the problem of building waste treatment is solved, the process steps are simple, no dust is raised in the mortar mixing process, the environment is protected, and the production cost of the mortar is reduced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

the embodiment of the invention provides a ready-mixed mortar mixture for buildings, which comprises the following raw materials in parts by weight: 10 parts of cement, 20 parts of sintered brick powder, 10 parts of fly ash, 50 parts of quartz sand, 20 parts of broken stone powder, 1 part of concrete admixture, 20 parts of water and 10 parts of water retention thickener.

Through make full use of building rubbish sintered brick powder, the effectual realization is changed waste into valuables to building rubbish, the difficult problem of building rubbish processing has been solved, add concrete admixture, water-retaining thickener simultaneously and make the mortar mixture have water-retaining property, thixotropic lubricity, dispersion suspension, slurry viscosity increases, make the mortar have good colloidal property, can also increase substantially the water-retaining property of fresh-mixed mortar, prevent that the mortar from educing, prevent that mortar moisture from losing too fast and leading to the mortar fracture, satisfy the constructability of mortar.

The water-retaining thickener comprises the following raw materials in percentage by mass: 30-40% of bentonite, 10-15% of kaolin, 8-10% of sepiolite, 10-15% of zeolite powder, 0.5-1.5% of hydroxypropyl methyl cellulose ether, 20-30% of phosphorous slag powder and 2-3% of lignosulfonate, so that the mortar has good plastic reduction, seepage prevention and frost resistance, the durability of a building is improved, mechanical spraying can be carried out on a building site, the labor intensity of building workers is reduced, and the construction efficiency is improved.

The concrete admixture comprises the following raw materials in percentage by mass: 60-65% of polycarboxylic acid water reducing agent, 25-30% of cellulose grafted chitosan, 6-9% of silane coupling agent, 2-3% of polyvinylpyrrolidone and 0.5-1.5% of silicon carbide, so that the slump loss of concrete is reduced, the workability of concrete is improved, and the fluidity of concrete is ensured.

A preparation method of a ready-mixed mortar mixture for buildings comprises the following steps:

s1, taking the following raw materials in parts by weight: 10 parts of cement, 20 parts of sintered brick powder, 10 parts of fly ash, 50 parts of quartz sand, 20 parts of broken stone powder, 1 part of concrete admixture, 20 parts of water and 10 parts of water retention thickener;

s2, pouring the water, the residual pipe pile paddles, the concrete admixture and the water retention thickening agent in the step S1 into a stirrer in sequence, and stirring for 4-5 minutes in a clockwise direction at the rotating speed of 60-70r/min to obtain a mixture A;

s3, sequentially pouring the cement and the fly ash obtained in the step S1 into the mixture A, stirring at the rotating speed of 50-55r/min for 4-5 minutes in the anticlockwise direction to obtain a mixture B;

and S4, sequentially pouring the quartz sand and the crushed stone powder in the step S1 into the mixture B, stirring the mixture B clockwise for 5 to 6 minutes at the rotation speed of 60 to 70r/min by using a stirrer, and then stirring the mixture C anticlockwise for 8 to 10 minutes to obtain the ready-mixed mortar mixture. The building waste sintered brick powder is fully utilized, the building waste is effectively changed into valuable, the problem of building waste treatment is solved, the process steps are simple, no dust is raised in the mortar mixing process, the environment is protected, and the production cost of the mortar is reduced.

The preparation method of the water-retaining thickener comprises the following steps:

(1) weighing bentonite, kaolin, sepiolite, zeolite powder and lignosulfonate according to the mass percentage, and carrying out baking intervention treatment;

(2) premixing the bentonite, kaolin, sepiolite, zeolite powder and lignosulfonate obtained in the step (1), and grinding in a grinding machine, wherein the particle size of the particles is 200-300 meshes;

(3) and (3) weighing the phosphorus slag powder, the hydroxypropyl methyl cellulose ether and the raw materials obtained by grinding in the step (2) according to the mass percentage, adding into a mixer, and mixing for 4-5min to obtain the water-retaining thickener.

The preparation method of the concrete admixture comprises the following steps:

(1) weighing a polycarboxylic water reducer, cellulose grafted chitosan, a silane coupling agent, polyvinylpyrrolidone and silicon carbide according to the mass percentage;

(2) and (3) adding the raw materials in the step (1) into a mixing stirrer to be mixed for 2-3min to obtain the concrete admixture.

Example two:

the embodiment of the invention provides a ready-mixed mortar mixture for buildings, which comprises the following raw materials in parts by weight: 15 parts of cement, 25 parts of sintered brick powder, 14 parts of fly ash, 55 parts of quartz sand, 25 parts of crushed stone powder, 2 parts of concrete admixture, 30 parts of water and 15 parts of water retention thickener.

Through make full use of building rubbish sintered brick powder, the effectual realization is changed waste into valuables to building rubbish, the difficult problem of building rubbish processing has been solved, add concrete admixture, water-retaining thickener simultaneously and make the mortar mixture have water-retaining property, thixotropic lubricity, dispersion suspension, slurry viscosity increases, make the mortar have good colloidal property, can also increase substantially the water-retaining property of fresh-mixed mortar, prevent that the mortar from educing, prevent that mortar moisture from losing too fast and leading to the mortar fracture, satisfy the constructability of mortar.

The water-retaining thickener comprises the following raw materials in percentage by mass: 30-40% of bentonite, 10-15% of kaolin, 8-10% of sepiolite, 10-15% of zeolite powder, 0.5-1.5% of hydroxypropyl methyl cellulose ether, 20-30% of phosphorous slag powder and 2-3% of lignosulfonate, so that the mortar has good plastic reduction, seepage prevention and frost resistance, the durability of a building is improved, mechanical spraying can be carried out on a building site, the labor intensity of building workers is reduced, and the construction efficiency is improved. Sepiolite is a fibrous hydrous magnesium silicate, and is characterized in that when meeting water, the sepiolite can absorb much water to become soft and become hard once dried, and has the characteristics of pure nature, no toxicity, no odor, no asbestos, no radioactivity and the like; the zeolite powder is prepared by grinding natural zeolite rock, is light green and white in color, and can relieve the phenomenon of water transfer; the hydroxypropyl methyl cellulose ether has the characteristics of thickening capacity, salt resistance, low ash content, pH stability, water retention property, size stability, excellent film forming property, wide enzyme resistance, dispersibility, cohesiveness and the like; the lignosulfonate can reduce water demand of mortar, increase fluidity and reduce mortar shrinkage.

The concrete admixture comprises the following raw materials in percentage by mass: 60-65% of polycarboxylic acid water reducing agent, 25-30% of cellulose grafted chitosan, 6-9% of silane coupling agent, 2-3% of polyvinylpyrrolidone and 0.5-1.5% of silicon carbide, so that the slump loss of concrete is reduced, the workability of concrete is improved, and the fluidity of concrete is ensured.

A preparation method of a ready-mixed mortar mixture for buildings comprises the following steps:

s1, taking the following raw materials in parts by weight: 15 parts of cement, 25 parts of sintered brick powder, 14 parts of fly ash, 55 parts of quartz sand, 25 parts of crushed stone powder, 2 parts of concrete admixture, 30 parts of water and 15 parts of water retention thickener;

s2, pouring the water, the residual pipe pile paddles, the concrete admixture and the water retention thickening agent in the step S1 into a stirrer in sequence, and stirring for 4-5 minutes in a clockwise direction at the rotating speed of 60-70r/min to obtain a mixture A;

s3, sequentially pouring the cement and the fly ash obtained in the step S1 into the mixture A, stirring at the rotating speed of 50-55r/min for 4-5 minutes in the anticlockwise direction to obtain a mixture B;

and S4, sequentially pouring the quartz sand and the crushed stone powder in the step S1 into the mixture B, stirring the mixture B clockwise for 5 to 6 minutes at the rotation speed of 60 to 70r/min by using a stirrer, and then stirring the mixture C anticlockwise for 8 to 10 minutes to obtain the ready-mixed mortar mixture. The process steps are simple, no dust is raised in the process of stirring the mortar, and the environment is protected.

The preparation method of the water-retaining thickener comprises the following steps:

(1) weighing bentonite, kaolin, sepiolite, zeolite powder and lignosulfonate according to the mass percentage, and carrying out baking intervention treatment;

(2) premixing the bentonite, kaolin, sepiolite, zeolite powder and lignosulfonate obtained in the step (1), and grinding in a grinding machine, wherein the particle size of the particles is 200-300 meshes;

(3) and (3) weighing the phosphorus slag powder, the hydroxypropyl methyl cellulose ether and the raw materials obtained by grinding in the step (2) according to the mass percentage, adding into a mixer, and mixing for 4-5min to obtain the water-retaining thickener.

The preparation method of the concrete admixture comprises the following steps:

(1) weighing a polycarboxylic water reducer, cellulose grafted chitosan, a silane coupling agent, polyvinylpyrrolidone and silicon carbide according to the mass percentage;

(2) and (3) adding the raw materials in the step (1) into a mixing stirrer to be mixed for 2-3min to obtain the concrete admixture.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.