CN113929408A

CN113929408A - Rigid waterproof slurry composition, rigid waterproof slurry, and preparation method and application thereof

Info

Publication number: CN113929408A
Application number: CN202111273806.4A
Authority: CN
Inventors: 张宁; 黄莉恒; 范坤哲; 殷少华
Original assignee: Keshun Civil Building Materials Co ltd
Current assignee: Keshun Civil Building Materials Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-01-14
Anticipated expiration: 2041-10-29
Also published as: CN113929408B

Abstract

The invention relates to the field of building waterproofing, and discloses a rigid waterproof slurry composition, a rigid waterproof slurry, and a preparation method and application thereof. The composition contains a component A and a component B, wherein the component A contains the following components which are respectively stored independently or in a mixed manner: portland cement, sulphoaluminate cement, a filler, a water reducing agent I, a defoaming agent I, cellulose ether, a silane water repellent and a retarder; the component B contains the following components which are stored independently or in a mixed manner: water, acrylic emulsion, organic silicon emulsion, water reducing agent II, defoaming agent II and bactericide. The rigid waterproof slurry prepared by the combination provided by the invention has obvious hydrophobic effect and anti-mildew effect, and simultaneously has quick drying effect, and the construction period can be shortened. The waterproof slurry has good bonding performance with a cement base surface.

Description

Rigid waterproof slurry composition, rigid waterproof slurry, and preparation method and application thereof

Technical Field

The invention relates to the field of building waterproofing, in particular to a rigid waterproof slurry composition, a rigid waterproof slurry, and a preparation method and application thereof.

Background

With the rapid promotion of urbanization, new houses in China are increasing. A large amount of rigid waterproofing slurry product needs to be used for waterproofing newly built houses.

The products popularized on the market at present are conventional rigid waterproof slurry, and the rigid waterproof coating is very easy to be soaked after being soaked in water. The long-term soaking in water can cause the failure of the waterproof effect of the waterproof coating film, thereby further influencing the living physical and psychological health of the householder and the neighborhood.

CN108751882A discloses a quick-drying double-component waterproof tile back glue, which comprises a liquid component A and a powder component B, wherein the weight ratio of the liquid component A to the powder component B is 1: (2-3); the liquid material component A comprises the following components in percentage by weight: 30.0-55.0 percent of acrylic emulsion, 5.0-10.0 percent of butylbenzene emulsion, 0.2-0.3 percent of preservative, 0.2-0.3 percent of defoaming agent, 0-0.5 percent of silane coupling agent and 33.9-64.6 percent of water; the powder component B comprises the following components in percentage by weight: 40.0 to 45.0 percent of ordinary Portland cement, 10.0 to 15.0 percent of sulphoaluminate cement, 3.0 to 5.0 percent of gypsum, 0.04 to 0.06 percent of cellulose ether and the like. The ceramic tile back glue obtained by the prior art has instability, and meanwhile, the ceramic tile back glue has no obvious hydrophobic effect.

Based on the above, there is a need for a waterproof slurry having both hydrophobic and quick-drying effects.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a rigid waterproof slurry which has a hydrophobic effect and a quick-drying effect and has a good bonding property with a cement base surface.

In order to achieve the above object, a first aspect of the present invention provides a rigid waterproof slurry composition comprising a powder component a and a liquid component B, wherein the powder component a comprises the following components stored independently of each other or in a mixture of two or more of them: portland cement, sulphoaluminate cement, a filler, a water reducing agent I, a defoaming agent I, cellulose ether, a silane water repellent and a retarder; the liquid material component B contains the following components which are respectively and independently stored or are mixed and stored: water, acrylic emulsion, organic silicon emulsion, water reducing agent II, defoaming agent II and bactericide;

based on the total weight of the powder component A, the content of the portland cement is 35-60 wt%, the content of the sulphoaluminate cement is 10-25 wt%, the content of the filler is 15-45 wt%, the content of the water reducing agent I is 0.05-1.00 wt%, the content of the defoaming agent I is 0.1-1.0 wt%, the content of the cellulose ether is 0.01-0.50 wt%, the content of the silane water repellent is 0.1-1.0 wt%, and the content of the retarder is 0.1-2.0 wt%;

based on the total weight of the liquid material component B, the content of water is 25-60 wt%, the content of acrylic emulsion is 35-60 wt%, the content of organosilicon emulsion is 3-15 wt%, the content of water reducing agent II is 0.1-0.5 wt%, the content of defoaming agent II is 0.1-0.5 wt%, and the content of bactericide is 0.1-0.5 wt%;

in the composition, the content weight ratio of the liquid material component B to the powder material component A is 1: 2.6-3.5.

A second aspect of the present invention provides a method of preparing a rigid waterproof slurry, the method comprising: preparing a powder mixture A and a liquid mixture B by respectively adopting the powder component A and the liquid component B in the composition in the first aspect, and mixing the prepared powder mixture A and liquid mixture B;

the method for preparing the powder mixture A comprises the following steps:

(i) carrying out first mixing on each component in the component a to obtain a mixture I; the component a contains Portland cement, sulphoaluminate cement and filler;

(ii) secondly, mixing the mixture I with the component b to obtain a powder mixture A; the component b contains a water reducing agent I, a defoaming agent I, cellulose ether, a silane water repellent and a retarder;

the method for preparing the liquid material mixture B comprises the following steps:

(1) thirdly mixing the components in the component c to obtain a mixture II; the component c contains water, acrylic emulsion and organic silicon emulsion;

(2) fourthly mixing the mixture II with a component d to obtain a mixture III; the component d contains a water reducing agent II;

(3) fifthly, mixing the mixture III with the component e to obtain a mixture IV; the component e contains a bactericide;

(4) sixth mixing the mixture IV with a component f to obtain a liquid material mixture B; the component f contains a defoaming agent II;

wherein the weight ratio of the liquid material mixture B to the powder material mixture A is 1: 2.6-3.5.

A third aspect of the present invention provides a rigid water-repellent paste prepared by the method of the second aspect.

A fourth aspect of the invention provides a use of the rigid waterproofing slurry described in the third aspect above for waterproofing a building.

The invention adopts the following components that the weight ratio of the liquid component B to the powder component A is 1: 2.6-3.5, and provides a composition with good processing performance by the synergistic combination of silicate cement, sulphoaluminate cement, acrylic emulsion, organosilicon emulsion and the like in a certain weight ratio in the two components. The rigid waterproof slurry prepared by the combination provided by the invention has obvious hydrophobic effect and anti-mildew effect, and simultaneously has quick drying effect, and the construction period can be shortened. The waterproof slurry has good bonding performance with a cement base surface.

Detailed Description

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as particularly advantageous herein.

In the present invention, the content of water as a component in the rigid waterproof paste composition does not include water that may be contained in the acrylic emulsion or the silicone emulsion.

As described above, according to the first aspect of the present invention, there is provided a rigid waterproof slurry composition comprising a powder component a and a liquid component B, wherein the powder component a comprises the following components stored independently of each other or in a mixture of two or more of them: portland cement, sulphoaluminate cement, a filler, a water reducing agent I, a defoaming agent I, cellulose ether, a silane water repellent and a retarder; the liquid material component B contains the following components which are respectively and independently stored or are mixed and stored: water, acrylic emulsion, organic silicon emulsion, water reducing agent II, defoaming agent II and bactericide;

Preferably, the portland cement is at least one selected from 42.5R portland cement and 52.5R portland cement.

Preferably, the sulphoaluminate cement is selected from 42.5 quick-hardening sulphoaluminate cements.

Preferably, the filler is a combination of river sand and ground calcium carbonate (abbreviated as heavy calcium). The average grain diameter of the river sand is 50-500 mu m, and the average grain diameter of the heavy calcium carbonate is 50-500 mu m.

Preferably, the water reducing agent I and the water reducing agent II are each independently selected from at least one of a polycarboxylic acid water reducing agent, a melamine water reducing agent, and a lignosulfonate.

Preferably, the defoaming agent I is at least one selected from silicone-based defoaming agents.

Preferably, the viscosity of the cellulose ether is 8000-100000 mPa.s, and the cellulose ether is at least one selected from hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether. The inventors of the present invention have found that in this preferred case, the resulting waterproof slurry has better adhesive properties.

Preferably, the silane water repellent is at least one selected from silicone water repellent powder.

Preferably, the retarder is tartaric acid with an average particle size of 50-500 μm.

Preferably, the acrylic emulsion is at least one selected from pure acrylic emulsion and styrene-acrylic emulsion.

Preferably, the silicone emulsion is at least one selected from modified silicone based silicone emulsions.

Preferably, the defoaming agent II is at least one selected from silicone defoaming agents and mineral oil defoaming agents.

Preferably, the bactericide is an isothiazolinone bactericide.

The method for preparing the aforementioned rigid waterproof slurry is not particularly limited by the present invention, and those skilled in the art can select it according to the technical means known in the art. However, the present invention provides a preferred embodiment in order to obtain a rigid waterproof paste having better hydrophobic effect and quick-drying effect. As previously mentioned, a second aspect of the present invention provides a method of preparing a rigid waterproof slurry, the method comprising: preparing a powder mixture A and a liquid mixture B by respectively adopting the powder component A and the liquid component B in the composition in the first aspect, and mixing the prepared powder mixture A and liquid mixture B;

the method for preparing the powder mixture A comprises the following steps:

Preferably, in the method for preparing the mixture a, the conditions of the first mixing and the second mixing each independently satisfy at least: stirring in a gravity-free stirring device for 6-10min at 20-40 deg.C.

Preferably, in the method for preparing the mixture B, the conditions of the third mixing, the fourth mixing, the fifth mixing and the sixth mixing each independently at least satisfy: under the condition of stirring, the rotating speed of the stirring is 600-1000rpm, the temperature is 20-40 ℃, and the time is 20-40 min.

Preferably, the mixture a and the mixture B are mixed under conditions at least satisfying: under the condition of stirring, the rotating speed of the stirring is 100-200rpm, the temperature is 20-40 ℃, and the time is 5-10 min.

As previously mentioned, a third aspect of the present invention provides a rigid water-repellent paste prepared by the method of the second aspect.

As mentioned above, a fourth aspect of the present invention provides the use of a rigid waterproofing slurry as described in the previous third aspect for waterproofing a building.

The present invention will be described in detail below by way of examples. In the following examples, various raw materials used are commercially available ones unless otherwise specified.

In the present invention, the room temperature is 25. + -. 2 ℃.

Component A

Portland cement

Portland cement I: 42.5R, available from the Endoconcha Sepiae Cement Ltd.

And (2) portland cement II: 52.5R, available from the Endoconcha Sepiae Cement Ltd.

Sulphoaluminate cement: 42.5 quick-hardening sulphoaluminate cement (hereinafter referred to as 42.5 quick-hardening) purchased from Tanshan Arctic bear building materials Co.

Filler material

River sand: average particle size 200 μm, available from Guangdong Austin New materials, Inc.

Heavy calcium carbonate: average particle size 300 μm, available from Guangdong Austin New materials, Inc.

Water reducing agent I

Water reducing agent I1: melamine water reducing agent, available from Pasteur.

Water reducing agent I2: polycarboxylate water reducing agent, available from basf.

Defoaming agent I: defoamer P803, available from minnow germany.

Cellulose ethers

Cellulose ether I: hydroxyethyl methyl cellulose ether having a viscosity of 8000 mPa.s, available from Shandong He Da GmbH.

Cellulose ether II: hydroxypropyl methylcellulose ether, having a viscosity of 60000 mPas, was obtained from Shandong Hedada, Inc.

Cellulose ether III: hydroxyethyl methyl cellulose ether having a viscosity of 120000 mPas, available from Shandong He Da GmbH.

Silane water repellent

Silane water repellent I: water repellent Seal80 available from aksonebel.

Retarder: tartaric acid, having an average particle size of 100 μm, was purchased from Kyoto Kanji.

Component B

Water: tap water.

Acrylic emulsion

Acrylic emulsion I: styrene-acrylic emulsion with a solid content of 50. + -. 1 wt.% was obtained from Guangdong Baddofuko.

Acrylic emulsion II: pure acrylic emulsion, with a solids content of 50. + -. 1% by weight, was purchased from Pasteur.

Silicone emulsion: dow Corning Silicone emulsions (hereinafter Dow Corning) were purchased from Dow Corning.

Water reducing agent II: polycarboxylate water reducing agent, available from basf.

And (3) defoaming agent II: silicone based antifoam, available from basf.

And (3) bactericide: isothiazolinones, available from dow chemical.

Example 1

This example illustrates the preparation of a rigid waterproof slurry according to the present invention using the formulation and process parameters of Table 1 and the method described below.

The preparation method of the rigid waterproof slurry comprises the following steps:

preparation of powder mixture A

(i) Firstly mixing the Portland cement, the sulphoaluminate cement and the filler in the component a at room temperature to obtain a mixture I;

(ii) secondly, mixing the mixture I with a water reducing agent I, a defoaming agent I, cellulose ether, a silane water repellent and a retarder in the component b at room temperature to obtain a powder mixture A;

the conditions of the first mixing and the second mixing are both: stirring in a gravity-free mixing and stirring device for 8 min;

preparation of liquid mixture B

(1) Thirdly mixing the water, the acrylic emulsion and the organic silicon emulsion in the component c at room temperature to obtain a mixture II;

(2) at room temperature, carrying out fourth mixing on the mixture II and the water reducing agent II in the component d to obtain a mixture III;

(3) at room temperature, fifth mixing the mixture III with the bactericide in the component e to obtain a mixture IV;

(4) sixthly, mixing the mixture IV with a defoaming agent II in the component f at room temperature to obtain a liquid material mixture B;

the conditions of the third mixing, the fourth mixing, the fifth mixing and the sixth mixing are as follows: stirring at 700rpm for 20 min;

mixing the powder mixture A and the liquid mixture B at room temperature to obtain rigid waterproof slurry J1;

the mixing conditions are as follows: stirring was carried out at 100rpm for 6 min.

Example 2

This example was carried out using the same procedure as example 1, except that in this example:

the rigid waterproof slurry composition used has different formulations and process parameters, as shown in tables 1 and 2.

Rigid waterproof slurry J2 was prepared.

Example 3

This example prepared a rigid waterproof slurry using a similar formulation and method as example 1, except that: equal weight of cellulose ether I was replaced with cellulose ether III and the rest was the same as in example 1 to prepare rigid waterproof slurry J3, see in particular tables 1 and 2.

Comparative example 1

This comparative example prepared a rigid waterproof slurry using a formulation and method similar to example 1, except that: rigid waterproof slurry DJ1 was prepared in the same manner as in example 1 except that no silane water repellent was used, and specifically, see tables 1 and 2.

Comparative example 2

This comparative example prepared a rigid waterproof slurry using a formulation and method similar to example 1, except that: the amount of retarder was 3.0g, and the remainder was the same as in example 1, and rigid waterproof slurry DJ2 was prepared, as shown in tables 1 and 2.

Comparative example 3

This comparative example prepared a rigid waterproof slurry using a formulation and method similar to example 1, except that: the acrylic emulsion I and the like were replaced with styrene-butadiene emulsion, and the rest was the same as in example 1, to prepare rigid waterproof slurry DJ3, specifically referring to tables 1 and 2.

Comparative example 4

This comparative example prepared a rigid waterproof slurry using a formulation and method similar to example 1, except that: the amount of sulphoaluminate cement used was 5g, the rest being the same as in example 1, giving a rigid waterproof slurry DJ4, see in particular tables 1 and 2.

Test example 1

The rigid waterproof slurries obtained in the examples and comparative examples were subjected to a performance test, specifically as follows.

1. Drying time: the test was performed with reference to JC/T2090-2011I standard.

2. Bonding strength: the test was performed with reference to JC/T2090-2011I standard.

3. The hydrophobic effect is as follows: the hydrophobic state was observed by applying 2 drops of water to the surface of a solid dry rigid water-repellent slurry 1.5mm thick using a 2mL disposable plastic dropper. Wherein, the water drop has obvious hydrophobicity and is good in the shape of a bead; it is typical that the water droplets wet the slurry and that the water droplets are not bead-like.

TABLE 1

TABLE 2

	Example 1	Example 2	Example 3	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4
								First mixing
Temperature (. degree.C.)	25	40	25	25	25	25	25
								Time (min)	8	10	8	8	8	8	8
Second mixing
								Temperature (. degree.C.)	25	40	25	25	25	25	25
Time (min)	8	10	8	8	8	8	8
								Third mix
Temperature (. degree.C.)	25	40	25	25	25	25	25
								Time (min)	20	30	20	20	20	20	20
Rotational speed (rpm)	700	900	700	700	700	700	700
								Fourth mix
Temperature (. degree.C.)	25	40	25	25	25	25	25
								Time (min)	20	30	20	20	20	20	20
Rotational speed (rpm)	700	900	700	700	700	700	700
								Fifth mixing
Temperature (. degree.C.)	25	40	25	25	25	25	25
								Time (min)	20	30	20	20	20	20	20
Rotational speed (rpm)	700	900	700	700	700	700	700
								Sixth mixture
Temperature (. degree.C.)	25	40	25	25	25	25	25
								Time (min)	20	30	20	20	20	20	20
Rotational speed (rpm)	700	900	700	700	700	700	700
								Mixing
Temperature (. degree.C.)	25	40	25	25	25	25	25
								Time (min)	6	10	6	6	6	6	6
Rotational speed (rpm)	100	200	100	100	100	100	100

TABLE 3

As can be seen from the results in Table 3, the rigid waterproof slurry provided by the invention has a good hydrophobic effect, is short in drying time and can shorten the construction period. Meanwhile, the rigid waterproof slurry provided by the invention has excellent bonding performance with a cement base surface, and still has good bonding performance after being soaked in water.

The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.

Claims

1. A rigid waterproof slurry composition is characterized by comprising a powder component A and a liquid component B, wherein the powder component A comprises the following components which are stored independently or in a mixed manner: portland cement, sulphoaluminate cement, a filler, a water reducing agent I, a defoaming agent I, cellulose ether, a silane water repellent and a retarder; the liquid material component B contains the following components which are respectively and independently stored or are mixed and stored: water, acrylic emulsion, organic silicon emulsion, water reducing agent II, defoaming agent II and bactericide;

2. The composition of claim 1, wherein the portland cement is selected from at least one of 42.5R portland cement, 52.5R portland cement; and/or the presence of a gas in the gas,

the sulphoaluminate cement is 42.5 quick-hardening sulphoaluminate cement; and/or the presence of a gas in the gas,

the filler is the combination of river sand and heavy calcium carbonate; and/or the presence of a gas in the gas,

the water reducing agent I and the water reducing agent II are respectively and independently selected from at least one of polycarboxylic acid water reducing agent, melamine water reducing agent and lignosulfonate.

3. The composition according to claim 1 or 2, wherein the defoamer I is selected from at least one of silicone-based defoamers; and/or the presence of a gas in the gas,

the viscosity of the cellulose ether is 8000-100000mPa & s, and the cellulose ether is at least one selected from hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; and/or the presence of a gas in the gas,

the silane water repellent is selected from at least one of siloxane water repellents; and/or the presence of a gas in the gas,

the retarder is tartaric acid with the average grain diameter of 50-500 mu m.

4. The composition according to any one of claims 1 to 3, wherein the acrylic emulsion is at least one selected from a acrylic emulsion, a styrene-acrylic emulsion; and/or the presence of a gas in the gas,

the organic silicon emulsion is selected from at least one of modified polysiloxane organic silicon emulsions; and/or the presence of a gas in the gas,

the defoaming agent II is at least one of a silicone defoaming agent and a mineral oil defoaming agent; and/or the presence of a gas in the gas,

the bactericide is an isothiazolinone bactericide.

5. A method of preparing a rigid water-repellent slurry, comprising: preparing a powder mixture A and a liquid mixture B by respectively adopting each component of the powder component A and the liquid component B in the composition of any one of claims 1 to 4, and mixing the prepared powder mixture A and liquid mixture B;

the method for preparing the powder mixture A comprises the following steps:

6. The process of claim 5, wherein in the process of preparing the mixture A, the conditions of the first mixing and the second mixing each independently at least satisfy: stirring in a gravity-free stirring device for 6-10min at 20-40 deg.C.

7. The process of claim 5 or 6, wherein in the process of preparing the mixture B, the conditions of the third mixing, the fourth mixing, the fifth mixing, and the sixth mixing each independently at least satisfy: under the condition of stirring, the rotating speed of the stirring is 600-1000rpm, the temperature is 20-40 ℃, and the time is 20-40 min.

8. The method according to claim 5 or 6, wherein the mixture A and the mixture B are mixed under at least the following conditions: under the condition of stirring, the rotating speed of the stirring is 100-200rpm, the temperature is 20-40 ℃, and the time is 5-10 min.

9. Rigid water-repellent paste prepared by the process according to any one of claims 5 to 8.

10. Use of the rigid waterproofing slurry of claim 9 in waterproofing buildings.