CN111517710A - Hydrophobic vitrified micro bubble thermal insulation mortar and preparation method thereof - Google Patents

Abstract

The invention discloses hydrophobic vitrified micro bubble thermal insulation mortar which comprises the following components in parts by weight: 30-70 parts of hydrophobic vitrified micro bubbles, 20-70 parts of cement, 1-30 parts of fly ash, 0.01-0.5 part of water retention material, 0.01-0.5 part of hydrophobic powder and 50-250 parts of water. The invention also discloses a preparation method of the hydrophobic vitrified microsphere thermal insulation mortar. The hydrophobic vitrified micro bubble thermal insulation mortar can keep excellent thermal insulation performance in a humid environment, and has excellent weather resistance and long service life; the preparation method is simple and convenient to operate, the preparation conditions are easy to control, the requirement on production equipment is low, and the method is easy to realize industrial production.

Description

Hydrophobic vitrified micro bubble thermal insulation mortar and preparation method thereof

Technical Field

The invention relates to the technical field of building materials, in particular to hydrophobic vitrified micro bubble thermal insulation mortar and a preparation method thereof.

Background

With the problem of energy consumption becoming more and more serious, it is an important social awareness in the world to enhance the utilization efficiency of energy and save energy. Building energy conservation is one of important ways for reducing energy consumption, and the building energy conservation refers to reducing energy consumption as much as possible under the condition of meeting the same requirements or achieving the same purpose in the production process of building materials and the construction and use processes of house buildings and structures. In a building, the heat loss of an outer wall enclosure structure is large, a wall body is a main component of the outer enclosure structure, and the development of an outer wall heat insulation technology becomes an important link for realizing building energy conservation according to the principle of value engineering, so that a large amount of energy can be saved, a comfortable environment can be provided for residents, and a lot of benefits are brought. The external thermal insulation technology for the external wall of China can be developed rapidly in recent years due to the advantages of avoiding the heat bridge effect, prolonging the service life of a building main body, being beneficial to later reinforcing and decorating of buildings and the like.

The vitrified microsphere thermal insulation mortar is a novel inorganic thermal insulation mortar material applied to external thermal insulation of an external wall, is formed by uniformly mixing vitrified microsphere as a lightweight aggregate and vitrified microsphere thermal insulation adhesive powder according to a certain proportion by stirring, has the remarkable characteristics of high strength, light weight, good thermal insulation, good electrical insulation performance, wear resistance, corrosion resistance, radiation resistance and the like, and has wide application prospect. However, the vitrified micro bubbles have high water absorption, so that the vitrified micro bubbles are easy to absorb moisture when exposed to a humid environment, the density of the material is increased after moisture absorption, and the heat conductivity coefficient is increased due to the occurrence of a thermal bridge effect, so that the heat insulation performance of the vitrified micro bubbles heat insulation mortar is obviously reduced, and the service life of the vitrified micro bubbles heat insulation mortar is obviously shortened.

Therefore, there is an urgent need to invent an external thermal insulation material for external wall, which can maintain excellent thermal insulation performance in humid environment, and has excellent weather resistance and long service life.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the hydrophobic vitrified microsphere thermal insulation mortar which can keep excellent thermal insulation performance in a humid environment, has excellent weather resistance and long service life.

The second purpose of the invention is to provide the preparation method of the hydrophobic vitrified microsphere thermal insulation mortar, which is the first purpose of the invention, the preparation method has simple and convenient operation, easy control of preparation conditions and lower requirements on production equipment, and is a method which is easy to realize industrial production.

One of the purposes of the invention is realized by adopting the following technical scheme:

the hydrophobic vitrified micro bubble thermal insulation mortar is characterized by comprising the following components in parts by weight:

30-70 parts of hydrophobic vitrified micro bubbles, 20-70 parts of cement, 1-30 parts of fly ash, 0.01-0.5 part of water retention material, 0.01-0.5 part of hydrophobic powder and 50-250 parts of water.

Further, the hydrophobic vitrified micro bubble thermal insulation mortar also comprises an organic silicon water repellent.

Further, the preparation method of the hydrophobic vitrified small ball comprises the following steps: and (3) soaking the vitrified micro bubbles in an organic silicon water repellent solution, and drying at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

Further, the organic silicon water repellent solution is prepared from an organic silicon water repellent and water according to the weight ratio of 1: 5-50 by volume ratio; in the step of preparing the hydrophobic vitrified micro bubbles, the soaking temperature is 20-50 ℃ and the time is 0.5-2 h.

Further, the organosilicon water repellent is one or a combination of more than two of methyl silicate water repellent and silane water repellent.

Further, the preparation steps of the hydrophobic vitrified micro bubbles are as follows:

and (3) uniformly spraying hexamethyldisilazane on the surfaces of the vitrified micro bubbles, and drying at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

Further, the water-retaining material is one or a combination of more than two of methyl cellulose ether, hydroxypropyl methyl cellulose ether and hydroxyethyl methyl cellulose ether.

Further, the hydrophobic powder is polysiloxane water repellent powder.

The second purpose of the invention is realized by adopting the following technical scheme:

the preparation method of the hydrophobic vitrified microsphere thermal insulation mortar, which is one of the purposes of the invention, is characterized by comprising the following steps:

and (3) mixing: uniformly stirring the hydrophobic vitrified microbead, the cement, the fly ash, the water-retaining material, the hydrophobic powder and the water according to the formula ratio to obtain a hydrophobic vitrified microbead heat-insulating mortar semi-finished product;

and (3) preparing a finished product: and uniformly mixing the organic silicon water repellent with water to obtain an organic silicon water repellent solution, and then spraying the organic silicon water repellent solution on the surface of the hydrophobic vitrified micro bubble thermal insulation mortar semi-finished product to obtain a hydrophobic vitrified micro bubble thermal insulation mortar finished product.

Further, in the step of preparing the finished product, the organosilicon water repellent is mixed with water according to the volume ratio of 1: 5-30.

Compared with the prior art, the invention has the beneficial effects that:

1. in the hydrophobic vitrified microsphere thermal insulation mortar, vitrified microspheres are modified in two different modes, namely, the vitrified microspheres are soaked in an organic silicon water repellent solution, and a hexamethyldisilazane water repellent is sprayed on the surfaces of the vitrified microspheres to obtain the hydrophobic vitrified microspheres, so that the water absorption rate of the vitrified microspheres with holes formed due to production can be effectively reduced.

2. According to the hydrophobic vitrified microsphere thermal insulation mortar, firstly, the hydrophobic vitrified microsphere is obtained by modifying the vitrified microsphere, so that the water absorption of the vitrified microsphere is effectively reduced; secondly, hydrophobic powder is doped into the thermal insulation mortar, so that the hydrophobic property of the cement slurry part in the thermal insulation mortar can be obviously improved; and thirdly, the organic silicon water repellent solution is sprayed on the surface of the thermal insulation mortar, so that the problem that the service life of the thermal insulation mortar is shortened due to moisture absorption and absorption of the thermal insulation mortar in a humid environment after construction can be effectively solved.

The invention improves the waterproof and moistureproof performances of the hydrophobic vitrified microsphere thermal insulation mortar to the maximum extent by simultaneously using three hydrophobic improvement measures and realizing synergistic interaction under three conditions, and can effectively solve the problems of high heat conductivity coefficient, remarkably reduced thermal insulation performance and remarkably shortened service life of the thermal insulation mortar due to water absorption in a humid environment.

3. The preparation method of the hydrophobic vitrified microsphere thermal insulation mortar has the advantages of simple and convenient operation, easy control of preparation conditions and lower requirements on production equipment, and is a method which is easy to realize industrial production.

Detailed Description

The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment. The equipment and raw materials used are all available on the market or commonly used in the field. The methods in the following examples are conventional in the art unless otherwise specified.

The hydrophobic vitrified micro bubble thermal insulation mortar comprises the following components in parts by weight:

30-70 parts of hydrophobic vitrified micro bubbles, 20-70 parts of cement, 1-30 parts of fly ash, 0.01-0.5 part of water retention material, 0.01-0.5 part of hydrophobic powder and 50-250 parts of water.

As a further embodiment, the hydrophobic vitrified micro bubble thermal mortar also comprises an organic silicon water repellent.

As a further embodiment, the preparation method of the hydrophobic vitrified small balls comprises the following steps: and (3) soaking the vitrified micro bubbles in an organic silicon water repellent solution, and drying at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

As a further embodiment, the organosilicon water repellent solution is an organosilicon water repellent and water in a ratio of 1: 5-50 by volume ratio; in the step of preparing the hydrophobic vitrified micro bubbles, the soaking temperature is 20-50 ℃ and the time is 0.5-2 h.

In a further embodiment, the organosilicon water repellent is one or a combination of more than two of methyl silicate water repellent, silane and siloxane water repellent and pure siloxane water repellent.

As a further embodiment, the preparation steps of the hydrophobic vitrified small ball are as follows:

and (3) spraying a hexamethyldisilazane water repellent on the surfaces of the vitrified micro bubbles, and drying at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

As a further embodiment, the water-retaining material is one or a combination of two or more of methyl cellulose ether, hydroxypropyl methyl cellulose ether, and hydroxyethyl methyl cellulose ether.

As a further embodiment, the hydrophobic powder is a polysiloxane hydrophobe powder.

The preparation method of the hydrophobic vitrified microsphere thermal insulation mortar comprises the following steps:

and (3) mixing: uniformly stirring the hydrophobic vitrified microbead, the cement, the fly ash, the water-retaining material, the hydrophobic powder and the water according to the formula ratio to obtain a hydrophobic vitrified microbead heat-insulating mortar semi-finished product;

and (3) preparing a finished product: and uniformly mixing the organic silicon water repellent with water to obtain an organic silicon water repellent solution, and then spraying the organic silicon water repellent solution on the surface of the hydrophobic vitrified micro bubble thermal insulation mortar semi-finished product to obtain a hydrophobic vitrified micro bubble thermal insulation mortar finished product.

As a further embodiment, in the step of preparing the finished product, the organosilicon water repellent is mixed with water according to the volume ratio of 1: 5-30.

Example 1:

the hydrophobic vitrified micro bubble thermal insulation mortar comprises the following components in parts by weight:

30 parts of hydrophobic vitrified micro bubbles, 20 parts of cement, 5 parts of fly ash, 0.01 part of water retention material, 0.5 part of polysiloxane water repellent powder and 50 parts of water.

Wherein the water-retaining material is methyl cellulose ether.

In addition, the preparation steps of the hydrophobic vitrified small ball comprise: the sodium methyl silicate water repellent and water are mixed according to the weight ratio of 1:5 to obtain an organic silicon water repellent solution, then soaking the vitrified micro bubbles in the organic silicon water repellent solution at the temperature of 20 ℃ for 0.5h, and then drying the vitrified micro bubbles in a drier at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

The preparation method of the hydrophobic vitrified microsphere thermal insulation mortar comprises the following steps:

and (3) mixing: uniformly stirring the hydrophobic vitrified micro bubbles, the cement, the fly ash, the water retention material, the siloxane water repellent powder and water according to the formula ratio to obtain a semi-finished product of the hydrophobic vitrified micro bubble heat preservation mortar;

and (3) preparing a finished product: uniformly mixing a sodium methyl silicate water repellent with water according to the volume ratio of 1:10 to obtain an organic silicon water repellent solution, and uniformly spraying the organic silicon water repellent solution on the surface of the semi-finished product of the hydrophobic vitrified micro bubble thermal insulation mortar to obtain a finished product of the hydrophobic vitrified micro bubble thermal insulation mortar.

Example 2:

the hydrophobic vitrified micro bubble thermal insulation mortar comprises the following components in parts by weight:

70 parts of hydrophobic vitrified micro bubbles, 70 parts of cement, 30 parts of fly ash, 0.5 part of water retention material, 0.05 part of polysiloxane water repellent powder and 200 parts of water.

Wherein, the water retention material is hydroxypropyl methyl cellulose ether and hydroxyethyl methyl cellulose ether.

In addition, the preparation steps of the hydrophobic vitrified small ball comprise: the water repellent and water of the sodium methyl silicate are mixed according to the weight ratio of 1: 50 to obtain an organic silicon water repellent solution, soaking the vitrified micro bubbles in the organic silicon water repellent solution at the temperature of 50 ℃ for 2 hours, and then drying the vitrified micro bubbles in a drier at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

The preparation method of the hydrophobic vitrified microsphere thermal insulation mortar comprises the following steps:

and (3) mixing: uniformly stirring the hydrophobic vitrified micro bubbles, the cement, the fly ash, the water retention material, the polysiloxane water repellent powder and water according to the formula ratio to obtain a semi-finished product of the hydrophobic vitrified micro bubble heat preservation mortar;

and (3) preparing a finished product: uniformly mixing a potassium methyl silicate water repellent with water according to the volume ratio of 1:30 to obtain an organic silicon water repellent solution, and then spraying the organic silicon water repellent solution on the surface of the semi-finished product of the hydrophobic vitrified micro bubble thermal insulation mortar to obtain a finished product of the hydrophobic vitrified micro bubble thermal insulation mortar.

Example 3:

the hydrophobic vitrified micro bubble thermal insulation mortar comprises the following components in parts by weight:

40 parts of hydrophobic vitrified micro bubbles, 40 parts of cement, 20 parts of fly ash, 0.2 part of water retention material, 0.2 part of polysiloxane water repellent powder and 150 parts of water.

Wherein, the water-retaining material is methyl cellulose ether and hydroxypropyl methyl cellulose ether.

In addition, the preparation steps of the hydrophobic vitrified small ball comprise: the silane water repellent and water are mixed according to the weight ratio of 1:30 to obtain an organic silicon water repellent solution, then soaking the vitrified micro bubbles in the organic silicon water repellent solution at the temperature of 40 ℃ for 1h, and then drying the vitrified micro bubbles in a drier at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

The preparation method of the hydrophobic vitrified microsphere thermal insulation mortar comprises the following steps:

and (3) mixing: uniformly stirring the hydrophobic vitrified micro bubbles, the cement, the fly ash, the water retention material, the polysiloxane water repellent powder and water according to the formula ratio to obtain a semi-finished product of the hydrophobic vitrified micro bubble heat preservation mortar;

and (3) preparing a finished product: uniformly mixing a methyl silicone sodium water repellent with water according to the volume ratio of 1:20 to obtain an organic silicon water repellent solution, and then spraying the organic silicon water repellent solution on the surface of the hydrophobic vitrified micro bubble thermal insulation mortar semi-finished product to obtain a hydrophobic vitrified micro bubble thermal insulation mortar finished product.

Example 4:

the hydrophobic vitrified micro bubble thermal insulation mortar comprises the following components in parts by weight:

70 parts of hydrophobic vitrified micro bubbles, 70 parts of cement, 10 parts of fly ash, 0.01 part of water retention material, 0.5 part of polysiloxane water repellent powder and 180 parts of water.

Wherein the water retention material is hydroxyethyl methyl cellulose ether.

In addition, the preparation steps of the hydrophobic vitrified small ball comprise: the surface of the vitrified micro bubbles is sprayed with hexamethyldisilazane water repellent, and then the vitrified micro bubbles are dried in a drier at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

The preparation method of the hydrophobic vitrified microsphere thermal insulation mortar comprises the following steps:

and (3) mixing: uniformly stirring the hydrophobic vitrified micro bubbles, the cement, the fly ash, the water retention material, the polysiloxane water repellent powder and water according to the formula ratio to obtain a semi-finished product of the hydrophobic vitrified micro bubble heat preservation mortar;

and (3) preparing a finished product: uniformly mixing a sodium methyl silicate water repellent with water according to the volume ratio of 1:10 to obtain an organic silicon water repellent solution, and then spraying the organic silicon water repellent solution on the surface of the semi-finished product of the hydrophobic vitrified micro bubble thermal insulation mortar to obtain a finished product of the hydrophobic vitrified micro bubble thermal insulation mortar.

Verification of the examples:

the beneficial effects of the hydrophobic vitrified micro bubble thermal insulation mortar of the invention are further illustrated by the following tests.

And (3) performance testing:

the water absorption test of the hydrophobic vitrified micro bubbles thermal insulation mortar of the examples 1 to 4 is carried out, and the test result is shown in table 1.

Table 1 shows the water absorption test results of the hydrophobic vitrified small ball thermal insulation mortar of examples 1 to 4:

as can be seen from Table 1, the hydrophobic vitrified microsphere thermal insulation mortar disclosed by the invention is low in water absorption, can stably maintain the thermal insulation performance in a humid environment, and prolongs the service life.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. The hydrophobic vitrified micro bubble thermal insulation mortar is characterized by comprising the following components in parts by weight:

30-70 parts of hydrophobic vitrified micro bubbles, 20-70 parts of cement, 1-30 parts of fly ash, 0.01-0.5 part of water retention material, 0.01-0.5 part of hydrophobic powder and 50-250 parts of water.

2. The hydrophobic vitrified microbead insulation mortar of claim 1, wherein the hydrophobic vitrified microbead insulation mortar further comprises an organosilicon water repellent.

3. The hydrophobic vitrified microsphere thermal mortar of claim 1, wherein the preparation of the hydrophobic vitrified microsphere comprises the following steps: and (3) soaking the vitrified micro bubbles in an organic silicon water repellent solution, and drying at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

4. The hydrophobic vitrified microbead thermal insulation mortar of claim 3, wherein the organosilicon water repellent solution is prepared by mixing an organosilicon water repellent and water according to the weight ratio of 1: 5-50 by volume ratio; in the step of preparing the hydrophobic vitrified micro bubbles, the soaking temperature is 20-50 ℃ and the time is 0.5-2 h.

5. The hydrophobic vitrified micro bubble thermal mortar of claim 2 or 4, wherein the organosilicon water repellent is one or a combination of more than two of methyl silicate water repellent and silane water repellent.

6. The hydrophobic vitrified microsphere thermal mortar of claim 1, wherein the preparation steps of the hydrophobic vitrified microsphere are as follows:

and (3) uniformly spraying hexamethyldisilazane on the surfaces of the vitrified micro bubbles, and drying at room temperature to constant weight to obtain the hydrophobic vitrified micro bubbles.

7. The hydrophobic vitrified bead thermal mortar of claim 1, wherein the water retention material is one or a combination of more than two of methyl cellulose ether, hydroxypropyl methyl cellulose ether and hydroxyethyl methyl cellulose ether.

8. The hydrophobic vitrified small ball thermal mortar of claim 1, wherein the hydrophobic powder is polysiloxane type water repellent powder.

9. The preparation method of the hydrophobic vitrified microbead thermal insulation mortar as claimed in claim 2, which is characterized by comprising the following steps:

and (3) mixing: uniformly stirring the hydrophobic vitrified microbead, the cement, the fly ash, the water-retaining material, the hydrophobic powder and the water according to the formula ratio to obtain a hydrophobic vitrified microbead heat-insulating mortar semi-finished product;

and (3) preparing a finished product: and uniformly mixing the organic silicon water repellent with water to obtain an organic silicon water repellent solution, and then spraying the organic silicon water repellent solution on the surface of the hydrophobic vitrified micro bubble thermal insulation mortar semi-finished product to obtain a hydrophobic vitrified micro bubble thermal insulation mortar finished product.

10. The preparation method of the hydrophobic vitrified microbead thermal mortar of claim 9, wherein in the step of preparing the finished product, the organosilicon water repellent is mixed with water according to the volume ratio of 1: 5-30.