CN114409305A

CN114409305A - Liquid interface treating agent, environment-friendly waterproof slurry and preparation method and construction method thereof

Info

Publication number: CN114409305A
Application number: CN202210084192.3A
Authority: CN
Inventors: 林杰生; 叶海杰; 林嘉乐; 代顺刚; 刘志桂; 郑颖威
Original assignee: Guangdong Carpoly Science & Technology Material Co ltd
Current assignee: Guangdong Carpoly Science & Technology Material Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-04-29
Anticipated expiration: 2042-01-19
Also published as: CN114409305B

Abstract

The invention discloses a liquid interface treating agent, an environment-friendly waterproof slurry, a preparation method and a construction method thereof, wherein the environment-friendly waterproof slurry is obtained by mixing the interface treating agent with solid powder, and the liquid interface treating agent comprises the following components in parts by weight: 5-15 parts of silicate hybrid emulsion, 5-15 parts of butylbenzene emulsion, 50-60 parts of carboxylic butylbenzene emulsion, 0.1-0.2 part of wetting agent, 0.2-0.3 part of defoaming agent and 2-6 parts of suspension of hydrated calcium silicate. The environment-friendly waterproof slurry adopts silicate hybrid emulsion to compound nano styrene-butadiene emulsion and carboxyl styrene-butadiene emulsion, and is added with nano-particle size calcium silicate hydrate early strength agent and silane coupling agent, so that a base layer can be sealed and reinforced through an interface treating agent, wetting construction is avoided, the waterproof slurry is fast-setting and early-strength, the waterproof layer has high bonding strength in the early and later stages, the construction efficiency is improved, the construction period is shortened, and the cost is saved.

Description

Liquid interface treating agent, environment-friendly waterproof slurry and preparation method and construction method thereof

Technical Field

The invention belongs to the technical field of building coatings, and particularly relates to a liquid interface treating agent, an environment-friendly waterproof slurry, and a preparation method and a construction method thereof.

Background

The polymer cement-base waterproof slurry is a common household waterproof material, also called K11 universal waterproof slurry, and consists of liquid with synthetic high molecular polymer emulsion as main component and powder comprising special cement, quartz powder and various additives in certain proportion. The waterproof slurry can improve the caking property of a solid cement mortar base layer, and various facing ceramic tiles are pasted after the waterproof slurry is dried and fixed. Along with the improvement of the requirements of people on living quality, the size of the home decoration tile is larger and larger, higher requirements are provided for the bonding strength of the waterproof layer, and the challenge is brought to the stability of the surface tile of the waterproof layer.

The traditional construction process of K11 waterproof slurry is to paint on a fully-wetted base surface without open water, and because the wall surface of the existing blank house is built by using light bricks, the water absorption is strong, and the wall vertical surface is difficult to meet the effect requirement of fully wetting, in order to improve the construction efficiency, a plurality of workers begin to coat the waterproof slurry when the wall surface is not wetted or is not wetted completely. In the construction under the condition of poor wetting, because the mortar base surface of the blank room is dry and has strong water absorption, water and emulsion in the waterproof coating can be quickly absorbed, the proportion of each component in the waterproof slurry is changed, the coating has low strength, delamination and pulverization, uneven coating, pinhole defect and the like, and the waterproof quality and the bonding stability of the later-stage wall tile are directly influenced. When the ground is wetted by water, the condition of excessive wetting with open water often occurs, and particularly when the wall surface and the ground are simultaneously wetted, the water on the wall surface flows down to form open water accumulated water on the ground. The waterproof slurry is coated on a bright water base surface, so that the waterproof slurry is easy to be efflorescent and blossoming, and the bonding strength and the impermeability are reduced. On the other hand, if the wall and floor are excessively wetted and open water exists, the waterproof slurry is brushed on the open water base surface, so that the efflorescence and the bonding strength and the impermeability are reduced.

Disclosure of Invention

The first purpose of the invention is to provide a liquid interface treating agent for base surface sealing, which can replace water spraying and wetting to carry out sealing treatment on a base surface, improve the bonding performance of a mortar layer, a waterproof layer and a tile veneer, improve the bonding strength and improve the construction efficiency.

The second purpose of the invention is to provide the environment-friendly waterproof slurry with high bonding strength, which has high bonding strength and coating strength, and the tile is firmer and has quick early strength and solidification.

The third purpose of the invention is to provide a preparation method of the environment-friendly waterproof slurry, which is simple to operate and can be prepared in real time according to construction requirements.

The fourth purpose of the invention is to provide a construction method of the environment-friendly waterproof slurry, which can overcome the defects of full wetting and no open water in actual operation, improve the construction efficiency, shorten the construction period and save the construction cost.

The invention adopts the following technical scheme:

in a first aspect, the present invention provides a liquid interface treatment agent for base surface sealing, which comprises the following components in parts by weight:

5-15 parts of silicate hybrid emulsion, 5-15 parts of butylbenzene emulsion, 50-60 parts of carboxylic butylbenzene emulsion, 0.1-0.2 part of wetting agent, 0.2-0.3 part of defoaming agent and 2-6 parts of suspension of hydrated calcium silicate;

wherein, the silicate hybrid emulsion is mainly obtained by hybrid polymerization of nano potassium silicate, nano lithium silicate and acrylic acid monomer.

Further, in a preferred embodiment of the present invention, the wetting agent comprises a nonionic gemini surfactant.

Further, in a preferred embodiment of the present invention, the liquid interface treatment agent further includes water, and the solid content of the liquid interface treatment agent is 25% to 50%.

In a second aspect, the invention provides an environment-friendly waterproof slurry with high bonding strength, which is obtained by mixing the liquid interface treating agent and solid powder, wherein the liquid-mass ratio of the liquid interface treating agent to the solid powder is 1L:2-4 kg;

the solid powder comprises the following components in parts by weight:

45-60 parts of Portland cement, 10-50 parts of quartz sand, 0.2-0.5 part of water reducing agent, 1.0-3.0 parts of metakaolin, 0.01-0.03 part of retarder, 0.03-0.08 part of cellulose ether and 0.2-0.5 part of silane coupling agent.

Further, in a preferred embodiment of the present invention, the cellulose ether includes at least one of hydroxypropyl methylcellulose, hydroxyethyl cellulose, and hydroxymethyl cellulose.

Further, in a preferred embodiment of the present invention, the silane coupling agent includes an epoxy functional silane coupling agent; the water reducing agent comprises lignosulfonate and polycarboxylate compounds.

In a third aspect, the present invention provides a method for preparing an environment-friendly waterproof slurry, comprising:

mixing the silicate hybrid emulsion, the butylbenzene emulsion, the carboxylic butylbenzene emulsion, the wetting agent, the defoaming agent, the suspension of hydrated calcium silicate and water according to the parts by weight to obtain a liquid interface treating agent;

mixing a silane coupling agent with quartz sand in a spraying manner, and then mixing the mixture with portland cement, quartz sand, a water reducing agent, metakaolin, a retarder and cellulose ether to obtain solid powder; and

and mixing the liquid interface treating agent and the solid powder according to the liquid-to-mass ratio of 1L to 2-4kg to obtain the environment-friendly waterproof slurry.

Preferably, the mixing time of the liquid interface treating agent and the solid powder is about 1-5min, and the usable time after uniform mixing is 0.8-1.2 h.

In a fourth aspect, the present invention provides a construction method of an environment-friendly waterproof slurry, including:

and uniformly coating the liquid interface treating agent on the surface of the base layer for sealing treatment, coating the environment-friendly waterproof slurry after drying to form a coating layer, and then curing the coating layer.

Further, in the preferred embodiment of the invention, in the process of maintaining the coating layer, when the construction temperature exceeds 35 ℃, the coating layer is sprayed with water every 8-24 hours.

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

1. in the liquid interface treating agent provided by the invention, potassium/lithium silicate contained in the silicate hybrid emulsion reacts with calcium hydroxide which is a cement hydration byproduct to form calcium silicate hydrate gel, so that the compactness and strength of a mortar base layer are improved. The butylbenzene emulsion is a nano-scale emulsion with dispersed liquid drops and the diameter of 5 nm-100 nm, can better penetrate into pores and microcracks to form a film, forms a seamless whole with a base material, and forms a continuous film in cooperation with macromolecules of the butylbenzene emulsion with the conventional particle size, and the continuous film is adhered to the surface of the base material, so that the hydrophobicity of the surface of the base material is improved, the effect of double reinforcement and protection is achieved, and the adhesive force of subsequent waterproof slurry can be obviously improved. Meanwhile, the water absorption rate of the emulsion dry film of the carboxylated styrene-butadiene emulsion, the nano styrene-butadiene emulsion or the nano hybrid emulsion is lower than 5%, the water resistance is good, the early-stage film-forming performance of the waterproof slurry coating is good, the coating does not soften in a water storage test every other day, the bonding strength is not obviously reduced, and the tile is more firmly pasted.

2. Compared with the traditional base layer water spraying wetting mode, the liquid interface treating agent disclosed by the invention is used for sealing the base surface, so that the compactness and strength of the surface layer of the mortar base layer are favorably improved, the bonding strength of waterproof slurry is enhanced, the defect of full wetting and no open water in actual operation is overcome, and the delamination risk of paving ceramic tiles on the early wall waterproof layer is reduced.

3. In the environment-friendly waterproof slurry provided by the invention, carboxyl in the carboxylic styrene-butadiene emulsion is a hydrophilic polar group, and can provide dispersion and flow properties for cement particles through adsorption, dispersion, wetting and other surface activity effects, improve the workability of the waterproof slurry (mortar or concrete is easy to construct and operate in each process and can obtain uniform quality and compact forming performance), and reduce shrinkage. The nano butylbenzene emulsion and the nano hybrid emulsion can better permeate into pores and micro cracks to form films and fill, and simultaneously silicate of the nano hybrid emulsion can react with calcium hydroxide to form calcium silicate hydrate gel, so that the compactness and impermeability of the mortar base layer are improved. Meanwhile, the silane coupling agent in the solid powder can form a stable Si-O-Si chemical bond with a siliceous material, so that a chemical bond of a Si-O-Si-R organic phase is formed on an interface of an organic material and an inorganic material in the emulsion, thereby enhancing the cohesive strength between the organic polymer emulsion and the inorganic mineral cement sand material in the waterproof slurry and also enhancing the adhesive property of the waterproof slurry to a concrete mortar base layer.

4. Compared with the existing waterproof slurry, the environment-friendly waterproof slurry provided by the invention has the advantages that the base layer is sealed and reinforced, the wetting construction is avoided, the waterproof slurry is fast-setting and early-strong, the waterproof layer has high bonding strength in the early stage and the later stage, and the requirements of home decoration market of 'construction waterproofing on the first day, water storage test on the second day and wall tiling on the third day' can be met, so that the construction efficiency is improved, the construction period is shortened, and the construction cost is saved. In addition, no biocide is added, potential harm to users is reduced, and the method is green and environment-friendly.

Detailed Description

The embodiments of the present invention are provided for illustrative purposes only and should not be construed as limiting the invention, and it will be understood by those skilled in the art that some well-known structures in the embodiments and descriptions thereof may be omitted.

The invention provides a liquid interface treating agent for basal plane sealing, which comprises the following components in parts by weight:

5-15 parts of silicate hybrid emulsion, 5-15 parts of butylbenzene emulsion, 50-60 parts of carboxylic butylbenzene emulsion, 0.1-0.2 part of wetting agent, 0.2-0.3 part of defoaming agent and 2-6 parts of suspension of hydrated calcium silicate.

Further, the liquid interface treating agent comprises the following components in parts by weight:

8-12 parts of silicate hybrid emulsion, 8-12 parts of butylbenzene emulsion, 52-58 parts of carboxylic butylbenzene emulsion, 0.12-0.18 part of wetting agent, 0.22-0.28 part of defoaming agent and 3-5 parts of suspension of calcium silicate hydrate.

Preferably, the liquid interface treatment agent comprises the following components in parts by weight:

9-11 parts of silicate hybrid emulsion, 9-11 parts of butylbenzene emulsion, 54-56 parts of carboxylic butylbenzene emulsion, 0.14-0.16 part of wetting agent, 0.24-0.26 part of defoaming agent and 4-5 parts of suspension of calcium silicate hydrate.

The liquid interface treating agent has the following components in mutual cooperation, and plays a role in improving the bonding performance of a mortar layer, a waterproof layer and a ceramic tile veneer together, and specifically:

the silicate hybrid emulsion is obtained by hybrid polymerization of nano potassium silicate, nano lithium silicate and acrylic acid monomer, belongs to an organic-inorganic hybrid nano material, and is a composite nano material formed by mixing and chemically bonding organic components and inorganic components at a molecular level or a nano scale. The silicate hybrid emulsion is a nano hybrid emulsion, the smaller the particle size of the emulsion is, the lower the surface tension is, and the stronger the permeability to a base layer is, so that the compactness of a mortar base layer can be improved. Typical polymer emulsions have latex particle diameters of 100 to several hundred nanometers. The diameter of the latex particle of the nano-scale polymer emulsion is between 5nm and 100 nm. The contained potassium silicate and lithium silicate react with calcium hydroxide which is a cement hydration byproduct to form calcium silicate hydrate gel, so that the compactness and strength of the mortar base layer are improved.

The butylbenzene emulsion is nano-scale emulsion, can better penetrate into pores and microcracks to form a film, forms a seamless whole with a substrate, forms a continuous film together with macromolecules of the butylbenzene emulsion with the conventional particle size, adheres to the surface of the substrate, and improves the hydrophobicity of the surface of the substrate.

The suspension of hydrated calcium silicate, which acts as an early strength agent, can promote the hydration process of early cement (6-12 hours) in the subsequent preparation of a waterproof slurry by mixing with solid powder. Based on the seed crystal technology, the growth of calcium silicate hydrate crystals in cement paste is accelerated, and the hardening of cement can be promoted at low temperature and thermal curing temperature. Unlike traditional early strength agent, the crystal seed can grow between cement grains without barrier, so that the early strength develops fast and the final strength is not affected. In addition, the existence of potassium silicate/lithium silicate in the nano silicate hybrid emulsion can play a certain role in accelerating coagulation, so that the waterproof slurry is accelerated to be coagulated and solidified. And the pH value of the nano silicate hybrid emulsion is between 10 and 11, compared with the traditional silicate accelerating agent, the nano silicate hybrid emulsion has low alkalinity, small corrosivity to reinforcing steel bars and human skin, moderate accelerating effect and little influence on the strength of later-stage waterproof mortar. The early strength agent and the coagulant have synergistic effect, so that the construction period can be shortened and the construction efficiency can be improved when the construction is carried out at low temperature in winter, and the process requirements of 'waterproof construction on the first day, water storage test on the second day and wall tile mounting on the third day' of home decoration companies can be met. The alkalinity of the nano silicate hybrid emulsion is utilized to achieve the effect of in-tank corrosion prevention, and a biocide is not added artificially.

The carboxylic styrene-butadiene emulsion, the nano styrene-butadiene emulsion and the nano hybrid emulsion contained in the liquid interface treating agent have the same characteristics that the water absorption rate of an emulsion dry film is lower than 5 percent, the water resistance is better, the early-stage film-forming performance of a waterproof slurry coating is good, the coating does not soften in a water storage test every other day, the bonding strength is not obviously reduced, and the tile is more firmly adhered. The water absorption rate of the conventional waterproof emulsions such as styrene-acrylic emulsion, pure acrylic emulsion and EVA emulsion is generally 15-20%, the water absorption rate of the emulsions is high, the water resistance of the slurry during early film formation is poor, the foam water is soft and frothy, the bonding strength is obviously reduced, the high-efficiency construction requirement of a water storage test at different days cannot be met, the waterproof emulsions generally need to be maintained for more than 2 weeks to form good water resistance, in addition, the conventional acrylic emulsion and EVA emulsion can be slowly hydrolyzed under an alkaline condition, and the styrene-butadiene polymer cannot be hydrolyzed.

Further, wetting agents include nonionic gemini surfactants such as alcohol ethers, phenol ethers, and sugar derivatives. It can link two or more same or almost same surfactant monomers together by a chemical bond through a linking group at or near a hydrophilic head group to form a surfactant. Compared with the common surfactant consisting of the monoalkyl hydrocarbon chain and the single ionic head group, the gemini surfactant has the advantages of easy adsorption on the air/liquid surface, effective reduction of the surface tension of water and excellent wetting performance, so that the liquid agent component can better wet a substrate and play a role in sealing and reinforcing.

Further, the defoaming agent includes at least one of an organosiloxane, a polyether, an amine, an imine, and an amide compound. The defoaming agent can be used for defoaming and defoaming the microbubbles generated in the production, blending or construction process of the waterproof material, so that the bubbles of the waterproof slurry can be avoided during construction, and the compactness and impermeability of the mortar coating are improved.

Further, the liquid interface treating agent also comprises water, and the solid content of the liquid interface treating agent is 25-50%, preferably 50%. The addition amount of water in the liquid interface agent is controlled, so that the solid content of the mixed liquid interface agent and solid powder is 75-85%, and the environment-friendly waterproof slurry with high bonding strength is formed. The coating with the solid content of less than 75 percent is easy to be thick, contracted and cracked, and the waterproof slurry with the solid content of more than 85 percent has too high viscosity and cannot be normally applied. Therefore, the content of water in the liquid interface treating agent is controlled, the concentration of each component is ensured to be in the optimal range, and the environment-friendly waterproof slurry with high bonding strength is formed by being mixed with solid powder subsequently.

The invention also provides environment-friendly waterproof slurry with high bonding strength, which is obtained by mixing the liquid interface treating agent and the solid powder, wherein the liquid-mass ratio of the liquid interface treating agent to the solid powder is 1L:2-4kg, 1L:2-4kg is preferred to be 1L: 2kg, 1L: 2.5kg, 1L: 3kg, 1L: 3.5kg, 1L: 4 kg. It is to be understood that the liquid interfacial agent includes the aqueous polymer latex and any additives thereof, and the solid powder includes the cement and the filler and any additives thereof.

The solid powder comprises the following components in parts by weight:

Further, the solid powder comprises the following components in parts by weight: 48-53 parts of Portland cement, 20-40 parts of quartz sand, 0.3-0.4 part of water reducing agent, 1.2-2.5 parts of metakaolin, 0.02-0.03 part of retarder, 0.04-0.06 part of cellulose ether and 0.2-0.3 part of silane coupling agent.

The silane coupling agent can form a stable Si-O-Si chemical bond with a siliceous material, so that the interface of an organic phase and an inorganic material of the emulsion forms a chemical bond of an Si-O-Si-R organic phase, and the cohesive strength between the organic polymer emulsion and the inorganic mineral cement sand material in the waterproof slurry can be enhanced and the adhesive property of the waterproof slurry to a concrete mortar base layer can be enhanced by introducing the chemical bond connection. Preferably, the silane coupling agent comprises an epoxy functional silane coupling agent.

The quartz sand is a hard, wear-resistant and chemically stable nonmetallic silicate mineral with particle size distribution of 60-200 meshes and SiO as main mineral component₂The mechanical strength and chemical corrosion resistance of the material can be effectively improved by adding the waterproof slurry into the waterproof slurry.

The Portland cement is in the strength level of more than 42.5, the Portland cement is divided into two types, and the Portland cement without mixed materials is called I-type Portland cement with the code P.I; the type II portland cement, code P.II, is obtained by adding limestone or granulated blast furnace slag mixed material with the mass not more than 5% of the cement.

Metakaolin is anhydrous aluminium silicate obtained by dehydrating kaolin at a suitable temperature, which may be mixed with Ca (OH)₂Reacting with water to obtain the product with gelling property. Metakaolin can generate gel with alkaline substances in cement paste to fill pores among cement particles, and the waterproof impermeability and early strength of the dry powder mortar are enhanced.

The cellulose ether is at least one of hydroxypropyl methylcellulose, hydroxyethyl cellulose and hydroxymethyl cellulose.

The water reducing agent is an additive which can generate good easiness (high fluidity, water retention property and cohesiveness) and is more convenient for pouring fluid concrete, but does not reduce the using amount and the strength of cement. The components of the water reducing agent comprise lignosulfonate or polycarboxylate compounds, and formaldehyde-containing water reducing agents such as naphthalene sulfonate formaldehyde polymers, polycyclic aromatic hydrocarbon sulfonate formaldehyde condensates or melamine sulfonate formaldehyde condensates are not used.

The retarder is an additive for delaying the setting time of concrete without obviously influencing the later strength, and comprises: sodium gluconate, tartaric acid.

At present, most of water-containing liquid waterproof materials are artificially added with a preservative, namely a biocide, in a tank to prevent microbial pollution, and the biocide has certain toxicity to people under many conditions. Currently, the content of isothiazolinone biocides in many products has been defined in the eu countries. The research shows that MI, CMI and BIT have potential contact sensitization, can trigger contact dermatitis and generate anaphylactic reaction. In China, an isothiazolinone biocide control project is set in published national standard GB/T35602-2017 'Green product evaluation coating'. The level of biocide in the waterproofing material also needs to be tightly controlled to avoid potential harm to the user. The water-proof material in the pool may be in indirect contact with the skin of a human body, or in contact with drinking water or food, etc.

The environment-friendly waterproof slurry provided by the embodiment mainly utilizes the alkalinity (the pH value is about 11) of the nano silicate hybrid emulsion to achieve the sterilization effect, the protein can be denatured in the alkaline environment, the strong alkali sterilization is that the protein can be denatured in the alkaline environment to kill microorganisms such as bacteria, and the like, and the hydroxyl radical takes hydrogen which is equivalent to water molecules in bacterial cell tissue molecules (carbohydrates), so that the bacteria are poisoned by alcohol to be killed. The emulsion and the surfactant used in the invention are not artificially added with biocides such as isothiazolinone and the like, so that potential harm to users is reduced, such as release of the biocides of waterproof materials, possibility of indirect contact with human skin, contact with drinking water or food and the like, and APEO is not contained, thus the invention is a green and environment-friendly solution.

In conclusion, the environment-friendly waterproof slurry with high bonding strength provided by the embodiment adopts the silicate hybrid emulsion to compound the nano styrene-butadiene emulsion and the carboxylic styrene-butadiene emulsion, and the nano calcium silicate hydrate early strength agent and the silane coupling agent with the nano particle size are added, so that the base layer can be sealed and reinforced through the interface treatment agent, the wetting-free construction is realized, the waterproof slurry is fast-set and early-strong, the waterproof layer has high bonding strength in the early stage and the later stage, the construction efficiency is improved, the construction period is shortened, and the cost is saved.

The embodiment also provides a preparation method of the environment-friendly waterproof slurry with high bonding strength, which comprises the following steps:

step S1: mixing the silicate hybrid emulsion, the butylbenzene emulsion, the carboxylic butylbenzene emulsion, the wetting agent, the defoaming agent and the suspension of hydrated calcium silicate according to the parts by weight to obtain the liquid interface treating agent;

in order to mix the components evenly, a liquid component, such as water, can be added during the mixing process, and preferably, the water is added during the mixing process, so that the solid content of the liquid interface treating agent is 25% -50%.

As will be readily appreciated by one of ordinary skill in the art, the liquid interfacial agent described herein may be implemented in any production equipment known in the art for the general preparation of waterborne coatings. Any suitable mixing device can be used, and the manner of mixing is not particularly limited, e.g., the components can be mixed at room temperature and pressure. The duration of addition of the various components and the duration of mixing at any stage in the process of formulating the components are not particularly limited, nor is the order of addition of the components. Any suitable stirrer may be used, including, for example, a high speed disperser or ribbon stirrer or rotary stirrer.

Step S2: and mixing a silane coupling agent with the quartz sand in a spraying manner, and then mixing the silane coupling agent with the portland cement, the quartz sand, a water reducing agent, the metakaolin, a retarder and cellulose ether to obtain solid powder.

Preferably, firstly adding quartz powder into a dry powder mortar mixing container known in the art, starting a mixer to mix the silane coupling agent with the quartz sand in a spraying manner under the stirring state, and then adding and mixing the mixture with the portland cement, the water reducing agent, the metakaolin, the retarder and the cellulose ether to obtain solid powder;

and the silane coupling agent is mixed with the quartz sand in a spraying mode, so that the silane coupling agent is prevented from being hydrolyzed when meeting water.

Step S3: and mixing the liquid interface treating agent and the solid powder according to the liquid-mass ratio of 1L:2-4kg to obtain the environment-friendly waterproof slurry.

In the step, the liquid interface conditioning agent and the solid powder are mixed for about 1-5min, and the time of use after uniform mixing is 0.8-1.2h when the construction temperature is 5-35 ℃. In the step, when the construction temperature is between 5 and 35 ℃, the liquid interface treating agent and the solid powder are mixed within 0.8 to 1.2 hours. If the mechanical stirring and mixing time is too long, bubbles can be introduced to influence the painting quality, and on the other hand, if the liquid interface treating agent is mixed with the solid powder, the cement in the solid powder is subjected to hydration reaction and solidification, and is initially solidified within about 0.8-1.2 hours, so that the solid powder can be used for a long time, and cannot be stirred for a too long time.

The embodiment also provides a construction method of the environment-friendly waterproof slurry, which comprises the following steps:

and uniformly coating the liquid interface treating agent on the surface of the base layer for sealing treatment, coating the environment-friendly waterproof slurry after drying, forming a coating layer after drying, and maintaining the coating layer for 48-72 hours.

And further, when the construction temperature exceeds 35 ℃, performing water spraying treatment on the coating layer every 8-24 hours. Specifically, the method is to spray water on the surface of a coating layer in a mist form to wet the surface of the coating layer fully without clear water.

Further, the coating layer is formed by coating 1-3 layers of environment-friendly waterproof slurry on the surface of the dried base layer. The method specifically comprises the following steps: and (3) uniformly coating the waterproof slurry on the surface of the base layer which is dried, by using a rolling brush, a brush or spraying and the like, and repeating the second coating after the surface of the coating is dried. The waterproof design has the thickness requirement, and waterproof layers of different waterproof grades have different thickness requirements, so, according to the design regulation, repeated multichannel coating until thickness reaches the design requirement. If the thickness is achieved by one-time coating, the problem of too thick coating and cracking are easily caused, and the thickness of each coating in general waterproof slurry construction is about 1mm, and the cracking is easily caused when the thickness exceeds 1 mm.

The following are the raw materials used in the examples and their manufacturers:

the carboxylic styrene-butadiene emulsion is selected from German Pasteur chemical SF ECO 7623 (solid content is 51 +/-1%).

The nano butylbenzene emulsion is selected from Shengxi ao LIGOS C3600 nano butylbenzene emulsion (solid content is 49%).

The nano hybrid emulsion was purchased from Foshan Bade Fukukuji Co., Ltd, model FS-6609 (solid content 37. + -. 1%).

The substrate wetting agent is a siloxane type gemini structure surfactant, and the TEGO Twin 4200 substrate wetting agent can be selected.

The defoaming agent is mineral oil defoaming agent selected from 681F defoaming agent produced by French Rodiya.

Suspensions of nano-sized calcium silicate hydrates selected from basf's germany

S7100L (solid content 25 +/-1%).

The water is municipal tap water.

The silicate cement is river sea snail cement company or Alboportland cement company with strength grade of 42.5.

The quartz powder can be quartz sand with particle size distribution range of 60-200 meshes, and can be 100 meshes produced by Guangdong Jiangmen new synthetic sand factory.

The water reducing agent is selected from polycarboxylic acid type 530P of Swiss Caca.

The metakaolin is selected from high-activity metakaolin YH110 from Xiayu Yukun mining company Limited in Jiaozu city.

The retarder is purchased from Guangzhou chemical reagent factory and is sodium gluconate and tartaric acid with the mass ratio of 1: 1.

The cellulose ether thickener is hydroxypropyl methylcellulose thickener, and is selected from MECELOSE PMC-15US of Korea Samsung.

The silane coupling agent is selected from A187 of the American Meyer diagram, and the chemical name is gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane. It can also be replaced by Z-6040 (Dow Corning, USA), OFS-6040 (XIAMERER Dow Corning, China), KBM-403 (shin-Etsu chemical Co., Ltd., Japan), GF 80 (Wake, Germany), KH-560 (Jiangxi Chenguang).

Example 1

The implementation provides an environment-friendly waterproof slurry with high bonding strength, which is prepared by mixing a liquid interface treating agent and solid powder according to a liquid-to-mass ratio of 1: 3;

the liquid interface treating agent comprises the following components in parts by weight: 3.0 parts of nano potassium silicate/lithium hybrid acrylic emulsion, 3.0 parts of nano butylbenzene emulsion, 35 parts of carboxylic butylbenzene emulsion, 0.2 parts of wetting agent, 0.2 parts of defoaming agent and 2 parts of suspension of hydrated calcium silicate; 56.6 parts of water. The solid content of the obtained liquid interfacial agent is about 21 percent, and the ratio of liquid to powder is 1:3 the solid content of the waterproof slurry obtained after mixing is about 80 percent.

The solid powder comprises the following components in parts by weight: 50 parts of I-type portland cement, 47.44 parts of quartz sand, 0.3 part of sodium lignosulfonate, 2.0 parts of metakaolin, 0.01 part of sodium gluconate, 0.05 part of hydroxypropyl methyl cellulose and 0.2 part of A187 silane coupling agent.

The preparation method of the environment-friendly waterproof slurry comprises the following steps:

s1: mixing the silicate hybrid emulsion, the butylbenzene emulsion, the carboxylic butylbenzene emulsion, the wetting agent, the defoaming agent, the suspension of hydrated calcium silicate and water according to the parts by weight to obtain a liquid interface treating agent;

s2: mixing a silane coupling agent with the quartz sand in a spraying manner, and then mixing the mixture with portland cement, quartz sand, a water reducing agent, metakaolin, a retarder and cellulose ether to obtain solid powder; and

s3: mixing a liquid interface treating agent and solid powder according to a liquid-to-mass ratio of 1L: 3Kg, and obtaining the environment-friendly waterproof slurry.

The embodiment also provides a construction method of the environment-friendly waterproof slurry, wherein the temperature of an external construction environment is measured to be 30 ℃): it includes:

s1, uniformly coating a liquid interface treating agent on the surface of a base layer by using a rolling brush and drying;

s2, uniformly coating the waterproof slurry on the liquid layer which is dried on the surface in a spraying mode, and drying;

s3, drying the surface of the coating, and repeating the second coating;

s4, maintaining for 48-72 h.

Example 2

The implementation provides an environment-friendly waterproof slurry with high bonding strength, which comprises a liquid interface treating agent and solid powder, wherein the liquid interface treating agent and the solid powder are mixed according to a liquid-to-mass ratio of 1L: 3Kg, the preparation method and the construction method thereof are the same as those of the example 1.

The liquid interface treating agent comprises the following components in parts by weight:

5 parts of nano lithium silicate hybrid acrylic emulsion, 15 parts of butylbenzene emulsion, 55 parts of carboxylic butylbenzene emulsion, 0.2 part of wetting agent, 0.2 part of defoaming agent, 6 parts of calcium silicate hydrate suspension and 18.6 parts of water;

the solid powder comprises the following components in parts by weight:

60 parts of type I portland cement, 35.93 parts of quartz sand, 0.5 part of sodium polycarboxylate, 3.0 parts of metakaolin, 0.02 part of sodium gluconate, 0.05 part of hydroxyethyl cellulose and 0.5 part of silane coupling agent.

Theoretically, the solid content of the liquid interfacial agent is about 45%, and the solid content of the waterproof slurry obtained by mixing the liquid and the powder is about 81.6%.

Example 3

The implementation provides an environment-friendly waterproof slurry with high bonding strength, which comprises a liquid interface treating agent and solid powder, wherein the liquid interface treating agent and the solid powder are mixed according to a liquid-to-mass ratio of 1L: 2Kg, the preparation method and the construction method thereof are the same as those of the example 1.

15 parts of nano lithium silicate hybrid acrylic emulsion, 15 parts of butylbenzene emulsion, 60 parts of carboxylic butylbenzene emulsion, 0.1 part of wetting agent, 0.3 part of defoaming agent, 6 parts of calcium silicate hydrate suspension and 3.6 parts of water;

the solid powder comprises the following components in parts by weight:

50 parts of I-type portland cement, 47.46 parts of quartz sand, 0.2 part of sodium polycarboxylate, 2.0 parts of metakaolin, 0.01 part of sodium gluconate, 0.03 part of hydroxyethyl cellulose and 0.3 part of silane coupling agent.

Theoretically, the solid content of the liquid interfacial agent is about 45%, and the solid content of the waterproof slurry obtained by mixing the liquid and the powder is about 81.6%. .

Example 4

The implementation provides an environment-friendly waterproof slurry with high bonding strength, which comprises a liquid interface treating agent and solid powder, wherein the liquid interface treating agent and the solid powder are mixed according to a liquid-to-mass ratio of 1L: 4Kg of the mixture, and the preparation method and the construction method thereof are the same as those of example 1.

5 parts of nano lithium silicate hybrid acrylic emulsion, 5 parts of butylbenzene emulsion, 20 parts of carboxylic butylbenzene emulsion, 0.1 part of wetting agent, 0.3 part of defoaming agent, 5 parts of calcium silicate hydrate suspension and 64.6 parts of water;

the solid powder comprises the following components in parts by weight:

55 parts of type I portland cement, 42.46 parts of quartz sand, 0.2 part of sodium polycarboxylate, 2.0 parts of metakaolin, 0.01 part of sodium gluconate, 0.03 part of hydroxyethyl cellulose and 0.3 part of silane coupling agent.

Theoretically, the solid content of the liquid interfacial agent is about 15.8%, and the solid content of the waterproof slurry obtained by mixing the liquid and the powder is about 83.2%.

Example 5

A liquid interfacial treatment agent, consistent with example 4;

the solid powder comprises the following components in parts by weight:

60 parts of type I portland cement, 37.46 parts of quartz sand, 0.3 part of sodium polycarboxylate, 2.0 parts of metakaolin, 0.01 part of sodium gluconate, 0.03 part of hydroxyethyl cellulose and 0.2 part of silane coupling agent.

Theoretically, the solid content of the liquid interfacial agent is about 15.8%, and the solid content of the waterproof slurry obtained by mixing the liquid and the powder is about 79%.

Example 6

The embodiment provides a liquid interface treating agent with high bonding strength, which comprises the following components in parts by weight:

5.0 parts of nano potassium silicate/lithium hybrid acrylic emulsion, 5.0 parts of nano butylbenzene emulsion, 50 parts of carboxyl butylbenzene emulsion, 0.2 part of wetting agent, 0.2 part of defoaming agent and 2 parts of suspension of hydrated calcium silicate; 37.6 parts of water.

according to the weight parts, mixing the silicate hybrid emulsion, the butylbenzene emulsion, the carboxylic butylbenzene emulsion, the wetting agent, the defoaming agent and the suspension of hydrated calcium silicate to obtain the liquid interface treating agent.

In order to illustrate the beneficial effects of the liquid interface treating agent and the environment-friendly waterproof slurry provided by the invention, the inventor carries out the following comparative examples:

comparative example 1

The comparative example provides a waterproof slurry which has the same components and content as the solid powder in example 1, and the preparation method is the same. The difference is that the components of silicate hybrid emulsion, nano styrene-butadiene emulsion and carboxylic styrene-butadiene emulsion in the liquid are replaced by styrene-acrylic emulsion with the same mass solid content.

Comparative example 2

The composition and content of the waterproof slurry provided by the comparative example are the same as those of the liquid interface treating agent in example 1, and the preparation method is also the same. The only difference is that no silane coupling agent is added to the solid powder.

Comparative example 3

The comparative example provides a waterproof slurry which has the same components and content as the solid powder in example 1, and the preparation method is the same. The only difference is that the suspension of the nano-sized calcium silicate hydrate is not added into the liquid interface treatment agent.

Comparative example 4

The comparative example provides a waterproof slurry which has the same components and content as the solid powder in example 1, and the preparation method is the same. The only difference is that the nano silicate hybrid emulsion is replaced by butylbenzene emulsion with equal mass solid content.

Comparative example 5

The comparative example provides a waterproof slurry which has the same components and contents as those in example 1 and the same preparation method, and when the temperature of the external construction environment is measured to be 32.5 ℃, the powder and the liquid in the step S1 are mixed, and the steps S2 and S3 are directly performed without applying a liquid interface treatment agent for sealing.

Testing

The impermeability, the surface drying time and the workability are tested by referring to the standard of JC/T2090-2010 polymer cement waterproof slurry.

In order to represent the early advancement of the index of heat resistance, moisture with the temperature (20 +/-3) DEG C and the relative humidity more than or equal to 90 percent in the standard is cured to the age of 7d and is placed in a boiling oven to be boiled for 5 h. Then taking out the test piece, observing whether cracking and peeling exist, shortening the temperature to be stricter (23 +/-2) DEG C, curing the test piece to 1d age at the relative humidity of 50 +/-10 percent, and putting the test piece in a boiling oven for boiling for 5 h. "set to" 1d Heat resistance ". Early heat resistance characterizes the heat and water resistance combination of the coating.

To characterize the early advancement of the "bond strength" index, the standard "was cured under standard test conditions for 96 hours, then placed in a (40 ± 2) ° c drying oven for 48 hours" and cured under standard test conditions for 24 hours "and then placed in a (40 ± 2) ° c drying oven for 48 hours" and set as "3 d bond strength".

The waterproof slurries provided in example 1 and comparative examples 1 to 5 above were used for wall waterproofing, and relevant parameters were tested to obtain the results shown in table 1.

Table 1 test results of waterproof pastes of example 1 and comparative example

As can be seen from the table, comparative example 1, which replaces the styrene-acrylic emulsion, has deteriorated early heat resistance and water resistance, the styrene-acrylic emulsion has a delayed coagulation effect, and the curing tack-free time is prolonged. Comparative example 2 reduced the silane coupling agent, and the adhesive strength was decreased, and the early heat resistance and water resistance were deteriorated. Comparative example 3 reduction of the suspension of calcium silicate hydrate having a nano particle size showed insignificant early strength effect of the coating, deterioration of surface dry time, early adhesive strength and early heat resistance, and decrease in impermeability. Comparative example 4 no nano-hybrid emulsion was used and the early strength effect of the coating was poor. Above early strong effect variation or not obvious can't reach the market demand of "construction is waterproof the first day, and the test of next day retaining is gone up the wall tiling the third day". Comparative example 5 had no sealing base surface, the workability was deteriorated, pinholes were liable to occur, and the adhesive strength was lowered.

The waterproof slurry provided in example 1 in table 1 was used for wall surface treatment, and was fast-dried and early-strengthened to form a uniform coating layer, and was high in adhesive strength and impermeability, and good in workability after sealing the base layer. Therefore, the environment-friendly waterproof slurry with high bonding strength provided by the invention adopts silicate hybrid emulsion to compound nano styrene-butadiene emulsion and carboxyl styrene-butadiene emulsion, and is added with nano calcium silicate hydrate early strength agent and silane coupling agent, so that the base layer can be sealed and reinforced by the interface treatment agent, the wetting construction is avoided, the waterproof slurry is fast-set and early-strong, the waterproof layer has high bonding strength in the early and later stages, the construction efficiency is improved, the construction period is shortened, and the cost is saved.

Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The liquid interface treating agent for basal plane sealing is characterized by comprising the following components in parts by weight:

5-15 parts of silicate hybrid emulsion, 5-15 parts of butylbenzene emulsion, 50-60 parts of carboxylic butylbenzene emulsion, 2-6 parts of calcium silicate hydrate suspension, 0.1-0.2 part of wetting agent and 0.2-0.3 part of defoaming agent;

the silicate hybrid emulsion is mainly obtained by hybrid polymerization of nano potassium silicate, nano lithium silicate and acrylic monomers.

2. The liquid interfacial agent of claim 1, wherein said wetting agent comprises a nonionic gemini surfactant.

3. The liquid interface treatment agent according to claim 2, further comprising water, wherein the solid content of the liquid interface treatment agent is 25% to 50%.

4. An environment-friendly waterproof slurry with high bonding strength, which is characterized by being prepared by mixing the liquid interface treating agent as claimed in any one of claims 1 to 3 with solid powder according to the liquid-mass ratio of 1L to 2-4 kg;

the solid powder comprises the following components in parts by weight:

5. The environmentally friendly waterproof slurry of claim 4, wherein the cellulose ether comprises at least one of hydroxypropyl methylcellulose, hydroxyethyl cellulose, and hydroxymethyl cellulose.

6. The environmentally waterproof slurry of claim 4, wherein the silane coupling agent comprises an epoxy functional silane coupling agent; the water reducing agent comprises lignosulfonate and polycarboxylate compounds.

7. A method for preparing the environmentally friendly waterproof slurry according to any one of claims 4 to 6, comprising:

mixing the silicate hybrid emulsion, the butylbenzene emulsion, the carboxylic butylbenzene emulsion, the wetting agent, the defoaming agent and the suspension of hydrated calcium silicate according to the parts by weight to obtain the liquid interface treating agent;

mixing the silane coupling agent with portland cement, quartz sand, a water reducing agent, metakaolin, a retarder and cellulose ether to obtain solid powder; and

and mixing the liquid interface treating agent and the solid powder according to the liquid-mass ratio of 1L:2-4kg to obtain the environment-friendly waterproof slurry.

8. The construction method of the environment-friendly waterproof slurry as claimed in any one of claims 4 to 6, wherein the construction method comprises the following steps:

and uniformly coating the liquid interface treating agent on the surface of the base layer for sealing treatment, coating the environment-friendly waterproof slurry after drying, forming a coating layer after drying, and then curing the coating layer.

9. The construction method according to claim 8, wherein in the process of maintaining the coating layer, when the construction temperature is higher than 35 ℃, the coating layer is sprayed with water every 8-24 hours.

10. The construction method according to claim 8, wherein the coating layer is formed by coating 1-3 layers of the environment-friendly waterproof slurry on the surface of the dried base layer.