CN111732445A - Preparation method of durable composite waterproof material for concrete - Google Patents
Preparation method of durable composite waterproof material for concrete Download PDFInfo
- Publication number
- CN111732445A CN111732445A CN202010086579.3A CN202010086579A CN111732445A CN 111732445 A CN111732445 A CN 111732445A CN 202010086579 A CN202010086579 A CN 202010086579A CN 111732445 A CN111732445 A CN 111732445A
- Authority
- CN
- China
- Prior art keywords
- parts
- concrete
- paraffin
- deionized water
- waterproof material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5035—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2391/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2391/06—Waxes
Landscapes
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
The invention relates to a preparation method of a durable composite waterproof material for concrete, and belongs to the technical field of waterproof materials. The invention takes emulsified paraffin as a substrate raw material and adds silane emulsion to prepare a durable composite waterproof material for concrete, the paraffin emulsion is demulsified to generate a multinuclear aluminum complex-paraffin complex which is precipitated on the surface of the concrete and is directionally and tightly arranged on an interface, so that the strength of an interface film is increased, the waterproof effect and the durability of the waterproof material can be effectively improved, the silane emulsion has lower surface energy, when the silane emulsion acts on the surface of the concrete, the silane emulsion can be rapidly spread on the surface of the concrete and permeate into the concrete, hydrophilic groups in the silane emulsion react with hydroxyl groups on the surface of the concrete and in pores to generate-Si-R groups, and hydrophobic groups-R are distributed on the surface of the concrete to reduce the surface energy of the concrete, thereby playing a role in preventing water intrusion.
Description
Technical Field
The invention relates to a preparation method of a durable composite waterproof material for concrete, and belongs to the technical field of waterproof materials.
Background
The concrete is a porous and heterogeneous material, the porous characteristic of the concrete enables the concrete to have high permeability, and the performance of the concrete material is gradually deteriorated and the durability is reduced under the combined action of multiple factors such as acid gas in the air, sulfate harmful media, load and the like. Numerous studies have shown that the deterioration mechanism of the durability problems of concrete is mostly related to the presence and migration of moisture, the hydrophilicity of the concrete causing the concrete to be in contact with its surface
The obtained water is easily adsorbed to the concrete surface layer by capillary action and further permeates into the concrete by taking the capillary as a channel
Inside the soil; when the concrete is completely immersed in the water solution, the water solution can be absorbed by capillary and infiltrated
The ions are transported to the inner pores of the concrete along with the migration of water and generate a series of physical and chemical reactions with concrete hydration products if the ions contain a large amount of harmful ions in the water solution, so that the thickness of a passivation film on the surface of the steel bar is reduced, the corrosion of the steel bar is caused, and the strength of a concrete structure is reduced; if the cement contains more alkali, the active ingredients in the aggregate can also react with the alkali in the cement to generate alkali-silicic acid gel, and under the condition of the existence of moisture, the reaction product absorbs water and expands in volume to cause the damage of a concrete structure; in addition, if the concrete is in a humid environment for a long time or is in contact with an aqueous solution, water is used as a solvent to dissolve calcium hydroxide in the concrete, so that other hydration products are decomposed and dissolved out to damage a concrete structure; extensive tests have shown that sufficient moisture participation is a necessary condition for the concrete to undergo freeze-thaw damage, sulfate attack, and alkali-aggregate reaction. Therefore, it is very important to study the water absorption property of the concrete surface and perform surface waterproofing treatment on the concrete to improve the durability.
At present, two methods are the most direct and simple methods for improving the waterproof effect of concrete, wherein one method is to internally mix waterproof materials: namely, a waterproof agent is added during the preparation of concrete to improve the impermeability of the concrete and achieve the purpose of preventing water intrusion, but the method is only suitable for small-area concrete, and the treatment cost can be greatly increased when the large-volume concrete is integrally treated; and secondly, performing surface waterproof treatment on the concrete, and forming a protective coating, a hydrophobic film and the like on the surface of the concrete by coating a waterproof material on the surface of the concrete to play a role in preventing water from invading. In recent years, because the permeable waterproof material has certain permeability, a hydrophobic film can be formed on the surface of concrete within a certain depth range, the surface free energy of the concrete is adjusted, the surface of the concrete is changed from hydrophilicity to hydrophobicity, and meanwhile, the air permeability of the concrete is not influenced, but the waterproof material has the defects of high volatility and the like in the application process, and the waterproof effect of the waterproof material is gradually reduced along with the prolonging of time.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems that the waterproof effect of the existing waterproof material is gradually reduced and the durability is insufficient, the preparation method of the durable composite waterproof material for the concrete is provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
(1) adding tetraethoxysilane into absolute ethyl alcohol, and stirring at the normal temperature at the rotating speed of 180-200 r/min for 10-15 min to obtain tetraethoxysilane ethanol solution;
(2) adding silane emulsion and deionized water into ethyl orthosilicate ethanol solution, placing the mixture into a high-shear emulsifying machine, and stirring the mixture for 30-40 min at the rotating speed of 6000-8000 r/min under the water bath condition of 50-60 ℃ to obtain silane mixed emulsion;
(3) adding emulsified paraffin and white vaseline into the silane mixed emulsion, placing the mixture into a high-shear emulsifying machine, stirring the mixture for 40-60 min at 12000-14000 r/min under the water bath condition of 60-70 ℃, then placing the mixture into an ultrasonic dispersion machine, and performing ultrasonic dispersion for 30-40 min at normal temperature to obtain the durable composite waterproof material for concrete.
The emulsified paraffin, the silane emulsion, the white vaseline, the ethyl orthosilicate, the absolute ethyl alcohol and the deionized water are respectively in parts by weight: 40-60 parts of emulsified paraffin, 20-30 parts of silane emulsion, 12-18 parts of white vaseline, 16-24 parts of ethyl orthosilicate, 40-60 parts of absolute ethyl alcohol and 40-60 parts of deionized water.
The power of ultrasonic dispersion is 500-600W
The specific preparation steps of the silane emulsion are as follows:
(1) adding polyethylene glycol, sorbitan fatty acid ester and dialkyl polyoxyethylene ether into deionized water, and stirring at a rotating speed of 200-250 r/min for 20-30 min under a water bath condition of 50-60 ℃ to obtain an emulsifier mixed solution;
(2) adding vinyl triethoxysilane, octyl triethoxysilane and isobutyl triethoxysilane into the emulsifier mixed solution, placing the mixture into a high-speed stirrer, stirring and emulsifying for 1-2 h at the rotating speed of 2000-3000 r/min under the condition of water bath at the temperature of 60-80 ℃, and cooling at normal temperature to obtain the silane emulsion.
The weight parts of the vinyl triethoxysilane, the octyl triethoxysilane, the isobutyl triethoxysilane, the polyethylene glycol, the sorbitan fatty acid ester, the dodecyl polyoxyethylene ether and the deionized water are respectively as follows: 10-20 parts of vinyl triethoxysilane, 8-16 parts of octyl triethoxysilane, 6-12 parts of isobutyl triethoxysilane, 3-6 parts of polyethylene glycol, 0.4-0.8 part of sorbitan fatty acid ester, 0.4-0.8 part of dodecyl polyoxyethylene ether and 100-200 parts of deionized water.
The specific preparation steps of the emulsified paraffin are as follows:
(1) placing paraffin in a water bath, stirring at the rotating speed of 120-160 r/min for 30-40 min at the temperature of 85-95 ℃, and preserving heat to obtain liquid paraffin;
(2) adding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate into liquid paraffin, adjusting the pH to 8-9, and stirring at a rotating speed of 200-240 r/min for 20-30 min under a water bath condition of 85-95 ℃ to obtain a paraffin mixed solution;
(2) preheating deionized water to 85-95 ℃, adding the preheated deionized water into the paraffin mixed solution, placing the paraffin mixed solution into a high-speed stirrer, stirring and emulsifying the mixture for 40-60 min at the rotating speed of 1000-1200 r/min under the water bath condition of 80-90 ℃, and cooling the mixture at normal temperature to obtain the emulsified paraffin.
The paraffin, the nonylphenol polyoxyethylene ether, the sodium dodecyl sulfate and the deionized water are respectively in parts by weight: 40-50 parts of paraffin, 2.0-2.5 parts of nonylphenol polyoxyethylene ether, 4-5 parts of sodium dodecyl sulfate and 200-250 parts of deionized water.
The pH is adjusted by adopting a sodium hydroxide solution with the mass fraction of 10%.
Compared with other methods, the method has the beneficial technical effects that:
(1) the invention takes emulsified paraffin as a matrix raw material to prepare a durable composite waterproof material for concrete, the main chemical component of the paraffin is saturated normal paraffin, almost has no reaction activity, the molecule does not contain hydrophilic groups, the oiliness is strong, the paraffin is an excellent hydrophobic substance, the emulsified paraffin is physically modified by paraffin through an emulsifier, the emulsifier is a surfactant, the molecule of the emulsified paraffin consists of hydrophilic polar groups and oleophylic nonpolar groups, after an oil-water incompatible system is added, the polar groups adsorb water molecules, the nonpolar groups extend into an oil phase, a bridge is formed between oil and water, the pH value of slurry is changed through a precipitator, so that the paraffin emulsion is demulsified to generate an electropositive polynuclear aluminum complex-paraffin complex, the complex is precipitated on the surface of concrete, the complex is formed on the interface, the complex is directionally and tightly arranged, and the paraffin-water interface has certain mechanical strength, the strength of the interface film is increased, the interface film is not easy to break, liquid beads are not easy to gather, the paraffin emulsion has high stability and good fluidity, emulsified paraffin particles are fine, the paraffin content of the emulsion is high, the uniformity and the diffusivity are good, and the waterproof effect and the durability of the waterproof material can be effectively improved;
(2) the invention prepares a durable composite waterproof material for concrete by adding silane emulsion, the silane emulsion is a heterogeneous multiphase system generated by the combined action of water, organic silicon and surfactant, has good cohesive force with concrete and has better stability within a certain time, thus being capable of protecting the concrete for a long time, the silane emulsion has lower surface energy, after acting on the surface of the concrete, the silane emulsion can be rapidly spread on the surface of the concrete and permeate into the concrete, hydrophilic groups in the silane emulsion react with hydroxyl groups on the surface of the concrete and in pores to generate-Si-R groups, hydrophobic groups-R are distributed on the surface of the concrete to reduce the surface energy of the concrete, thereby playing the role of preventing the intrusion of water, more importantly, the silane emulsion is uniformly distributed on the inner wall of a capillary hole of the concrete, but does not seal pores, does not hinder water diffusion, better keeps the air permeability of the base material, and improves the surface performance of the concrete from multiple aspects.
Detailed Description
Weighing 40-50 parts of paraffin, 2.0-2.5 parts of nonylphenol polyoxyethylene ether, 4-5 parts of sodium dodecyl sulfate and 200-250 parts of deionized water in parts by weight, placing the paraffin in a water bath, stirring at the rotating speed of 120-160 r/min for 30-40 min at the temperature of 85-95 ℃, preserving heat to obtain liquid paraffin, adding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate into the liquid paraffin, dropwise adding a sodium hydroxide solution with the mass fraction of 10% to adjust the pH to 8-9, stirring for 20-30 min at a rotating speed of 200-240 r/min under a water bath condition of 85-95 ℃ to obtain a paraffin mixed solution, preheating deionized water to 85-95 ℃, adding the paraffin mixed solution into a high-speed stirrer, stirring and emulsifying for 40-60 min at the rotating speed of 1000-1200 r/min under the water bath condition of 80-90 ℃, and cooling at normal temperature to obtain the emulsified paraffin.
Respectively weighing 10-20 parts of vinyl triethoxysilane, 8-16 parts of octyl triethoxysilane, 6-12 parts of isobutyl triethoxysilane, 3-6 parts of polyethylene glycol, 0.4-0.8 part of sorbitan fatty acid ester, 0.4-0.8 part of dodecyl polyoxyethylene ether and 100-200 parts of deionized water according to parts by weight, adding the polyethylene glycol, the sorbitan fatty acid ester and the dialkyl polyoxyethylene ether into the deionized water, stirring for 20-30 min at a rotating speed of 200-250 r/min under the condition of a water bath at 50-60 ℃ to obtain an emulsifier mixed solution, adding vinyl triethoxysilane, octyl triethoxysilane and isobutyl triethoxysilane into the emulsifier mixed solution, placing in a high-speed stirrer, stirring and emulsifying for 1-2 h at the rotating speed of 2000-3000 r/min under the water bath condition of 60-80 ℃, and cooling at normal temperature to obtain silane emulsion;
then respectively weighing 40-60 parts of emulsified paraffin, 20-30 parts of silane emulsion, 12-18 parts of white vaseline, 16-24 parts of ethyl orthosilicate, 40-60 parts of absolute ethyl alcohol and 40-60 parts of deionized water according to parts by weight, adding ethyl orthosilicate into the absolute ethyl alcohol, stirring at the normal temperature at the rotating speed of 180-200 r/min for 10-15 min to obtain an ethyl orthosilicate ethanol solution, adding the silane emulsion and the deionized water into the ethyl orthosilicate ethanol solution, placing the ethyl orthosilicate ethanol solution in a high-shear emulsifying machine, stirring at the rotating speed of 6000-8000 r/min for 30-40 min under the water bath condition of 50-60 ℃ to obtain a silane mixed emulsion, adding the emulsified paraffin and the white vaseline into the silane mixed emulsion, placing the silane mixed emulsion in the high-shear emulsifying machine, stirring at the rotating speed of 12000-14000 r/min for 40-60 min under the water bath condition of 60-70 ℃, placing the silane mixed emulsion in an ultrasonic dispersing machine, and ultrasonically dispersing at normal temperature at the power of 500-600W for 30-40 min, the durable composite waterproof material for concrete is obtained.
Example 1
Weighing 40 parts of paraffin, 2.0 parts of nonylphenol polyoxyethylene ether, 4 parts of sodium dodecyl sulfate and 200 parts of deionized water respectively, placing the paraffin in a water bath, stirring at the rotating speed of 120r/min for 30min at 85 ℃, preserving the temperature to obtain liquid paraffin, adding the nonylphenol polyoxyethylene ether and the sodium dodecyl sulfate into the liquid paraffin, dropwise adding a sodium hydroxide solution with the mass fraction of 10% to adjust the pH to 8, stirring at the rotating speed of 200r/min for 20min at the water bath condition of 85 ℃ to obtain a paraffin mixed solution, preheating the deionized water to 85 ℃, adding the preheated deionized water into the paraffin mixed solution, placing the paraffin mixed solution in a high-speed stirrer, stirring and emulsifying at the rotating speed of 1000r/min for 40min at the water bath condition of 80 ℃, and cooling at normal temperature to obtain the emulsified paraffin.
Respectively weighing 10 parts of vinyltriethoxysilane, 8 parts of octyltriethoxysilane, 6 parts of isobutyltriethoxysilane, 3 parts of polyethylene glycol, 0.4 part of sorbitan fatty acid ester, 0.4 part of dodecyl polyoxyethylene ether and 100 parts of deionized water, adding the polyethylene glycol, the sorbitan fatty acid ester and the dialkyl polyoxyethylene ether into the deionized water, stirring for 20min at the rotating speed of 200r/min under the water bath condition of 50 ℃ to obtain an emulsifier mixed solution, adding the vinyltriethoxysilane, the octyltriethoxysilane and the isobutyltriethoxysilane into the emulsifier mixed solution, placing the emulsifier mixed solution in a high-speed stirrer, stirring and emulsifying for 1h at the rotating speed of 2000r/min under the water bath condition of 60 ℃, and cooling at normal temperature to obtain a silane emulsion;
respectively weighing 40 parts of emulsified paraffin, 20 parts of silane emulsion, 12 parts of white vaseline, 16 parts of ethyl orthosilicate, 40 parts of absolute ethyl alcohol and 40 parts of deionized water according to parts by weight, adding the ethyl orthosilicate into the absolute ethyl alcohol, stirring at normal temperature at a rotating speed of 180r/min for 10min to obtain ethyl orthosilicate ethanol solution, adding silane emulsion and deionized water into the ethyl orthosilicate ethanol solution, placing in a high-shear emulsifying machine, stirring at 6000r/min for 30min in 50 deg.C water bath to obtain silane mixed emulsion, adding emulsified paraffin and white vaseline into the silane mixed emulsion, placing in high shear emulsifying machine, stirring the mixture for 40min at a rotating speed of 12000r/min under the water bath condition of 60 ℃, then placing the mixture in an ultrasonic dispersion machine, and ultrasonically dispersing the mixture for 30min at the normal temperature at the power of 500W to obtain the durable composite waterproof material for the concrete.
Example 2
Respectively weighing 45 parts of paraffin, 2.25 parts of nonylphenol polyoxyethylene ether, 4.5 parts of sodium dodecyl sulfate and 225 parts of deionized water according to parts by weight, placing the paraffin in a water bath, stirring at a rotating speed of 140r/min for 35min at a temperature of 90 ℃, preserving heat to obtain liquid paraffin, adding the nonylphenol polyoxyethylene ether and the sodium dodecyl sulfate into the liquid paraffin, dropwise adding a sodium hydroxide solution with a mass fraction of 10% to adjust the pH to 8.5, stirring at a rotating speed of 220r/min for 25min at a water bath condition of 90 ℃ to obtain a paraffin mixed solution, preheating the deionized water to 90 ℃, adding the preheated deionized water into the paraffin mixed solution, placing the paraffin mixed solution in a high-speed stirrer, stirring and emulsifying at a rotating speed of 1100r/min for 50min at a water bath condition of 85 ℃, and cooling at normal temperature to obtain the emulsified paraffin.
Respectively weighing 15 parts of vinyltriethoxysilane, 12 parts of octyltriethoxysilane, 9 parts of isobutyltriethoxysilane, 4.5 parts of polyethylene glycol, 0.6 part of sorbitan fatty acid ester, 0.6 part of dodecyl polyoxyethylene ether and 150 parts of deionized water, adding the polyethylene glycol, the sorbitan fatty acid ester and the dialkyl polyoxyethylene ether into the deionized water, stirring for 25min at 225r/min under the water bath condition of 55 ℃ to obtain an emulsifier mixed solution, adding the vinyltriethoxysilane, the octyltriethoxysilane and the isobutyltriethoxysilane into the emulsifier mixed solution, placing the mixture in a high-speed stirrer, stirring and emulsifying for 1.5h at 2500r/min under the water bath condition of 70 ℃, and cooling at normal temperature to obtain a silane emulsion;
respectively weighing 50 parts of emulsified paraffin, 25 parts of silane emulsion, 15 parts of white vaseline, 20 parts of ethyl orthosilicate, 50 parts of absolute ethyl alcohol and 50 parts of deionized water according to parts by weight, adding the ethyl orthosilicate into the absolute ethyl alcohol, stirring at normal temperature at the rotating speed of 190r/min for 12.5min to obtain ethyl orthosilicate ethanol solution, adding silane emulsion and deionized water into the ethyl orthosilicate ethanol solution, placing in a high-shear emulsifying machine, stirring at 7000r/min in water bath at 55 deg.C for 35min to obtain silane mixed emulsion, adding emulsified paraffin and white vaseline into the silane mixed emulsion, placing in high shear emulsifying machine, stirring the mixture for 50min at the rotating speed of 13000r/min under the water bath condition of 65 ℃, then placing the mixture in an ultrasonic dispersion machine, and ultrasonically dispersing the mixture for 35min at the normal temperature with the power of 550W to obtain the durable composite waterproof material for the concrete.
Example 3
Respectively weighing 50 parts of paraffin, 2.5 parts of nonylphenol polyoxyethylene ether, 5 parts of sodium dodecyl sulfate and 250 parts of deionized water according to parts by weight, placing the paraffin in a water bath, stirring for 40min at the rotating speed of 160r/min at the temperature of 95 ℃, preserving heat to obtain liquid paraffin, adding the nonylphenol polyoxyethylene ether and the sodium dodecyl sulfate into the liquid paraffin, dropwise adding a sodium hydroxide solution with the mass fraction of 10% to adjust the pH value to 9, stirring for 30min at the rotating speed of 240r/min at the water bath condition of 95 ℃ to obtain a paraffin mixed solution, preheating the deionized water to 95 ℃, adding the preheated deionized water into the paraffin mixed solution, placing the paraffin mixed solution in a high-speed stirrer, stirring and emulsifying for 60min at the rotating speed of 1200r/min at the water bath condition of 90 ℃, and cooling at normal temperature to obtain the emulsified paraffin.
Respectively weighing 20 parts of vinyltriethoxysilane, 16 parts of octyltriethoxysilane, 12 parts of isobutyltriethoxysilane, 6 parts of polyethylene glycol, 0.8 part of sorbitan fatty acid ester, 0.8 part of dodecyl polyoxyethylene ether and 200 parts of deionized water, adding the polyethylene glycol, the sorbitan fatty acid ester and the dialkyl polyoxyethylene ether into the deionized water, stirring for 30min at a rotating speed of 250r/min under a water bath condition of 60 ℃ to obtain an emulsifier mixed solution, adding the vinyltriethoxysilane, the octyltriethoxysilane and the isobutyltriethoxysilane into the emulsifier mixed solution, placing the emulsifier mixed solution in a high-speed stirrer, stirring and emulsifying for 2h at a rotating speed of 3000r/min under a water bath condition of 80 ℃, and cooling at normal temperature to obtain a silane emulsion;
respectively weighing 60 parts of emulsified paraffin, 30 parts of silane emulsion, 18 parts of white vaseline, 24 parts of ethyl orthosilicate, 60 parts of absolute ethyl alcohol and 60 parts of deionized water according to parts by weight, adding the ethyl orthosilicate into the absolute ethyl alcohol, stirring at normal temperature at a rotating speed of 200r/min for 15min to obtain ethyl orthosilicate ethanol solution, adding silane emulsion and deionized water into the ethyl orthosilicate ethanol solution, placing in a high-shear emulsifying machine, stirring at 8000r/min for 40min in water bath at 60 deg.C to obtain silane mixed emulsion, adding emulsified paraffin and white vaseline into the silane mixed emulsion, placing in high shear emulsifying machine, stirring the mixture for 60min at the rotating speed of 14000r/min under the water bath condition of 70 ℃, then placing the mixture in an ultrasonic dispersion machine, and ultrasonically dispersing the mixture for 40min at the power of 600W at normal temperature to obtain the durable composite waterproof material for the concrete.
Comparative example: waterproof material produced by Guangzhou company
The durable composite waterproof material for concrete and the waterproof material produced by Guangzhou company prepared by the invention are detected, and the detection method comprises the following steps: placing the mortar test block maintained for 28 days in an oven at 80 ℃ for drying for two days, taking out the mortar test block, and drying the mortar test block at 400 Ag/m2The coating amount of (2) is divided into two times to treat the surface of the mortar. In order to prevent the material from volatilizing, the preservative film is covered after the coating is finished, the mixture is kept stand for a week, and after the waterproof material is completely absorbed, the mortar subjected to surface treatment is respectively placed for 1 day, 10 days, 20 days and 30 days for waterproof test. The waterproof test method comprises the following steps: placing the coated surface of the mortar into a flat-bottom container with a bracket at the bottom, pouring deionized water until the coated surface is 35mm higher than the bottom surface of the test block, and measuring the water absorption capacity of the mortar, wherein the specific detection results are shown in the following table 1:
TABLE 1
It can be seen from table 1 that the durable composite waterproof material for concrete prepared by the present invention has good waterproof effect and durability.
Claims (8)
1. A preparation method of a durable composite waterproof material for concrete is characterized by comprising the following specific preparation steps:
(1) adding tetraethoxysilane into absolute ethyl alcohol, and stirring at the normal temperature at the rotating speed of 180-200 r/min for 10-15 min to obtain tetraethoxysilane ethanol solution;
(2) adding silane emulsion and deionized water into ethyl orthosilicate ethanol solution, placing the mixture into a high-shear emulsifying machine, and stirring the mixture for 30-40 min at the rotating speed of 6000-8000 r/min under the water bath condition of 50-60 ℃ to obtain silane mixed emulsion;
(3) adding emulsified paraffin and white vaseline into the silane mixed emulsion, placing the mixture into a high-shear emulsifying machine, stirring the mixture for 40-60 min at 12000-14000 r/min under the water bath condition of 60-70 ℃, then placing the mixture into an ultrasonic dispersion machine, and performing ultrasonic dispersion for 30-40 min at normal temperature to obtain the durable composite waterproof material for concrete.
2. The method for preparing a durable composite waterproof material for concrete according to claim 1, wherein the parts by weight of the emulsified paraffin, the silane emulsion, the white vaseline, the ethyl orthosilicate, the absolute ethyl alcohol and the deionized water are respectively 40-60 parts of the emulsified paraffin, 20-30 parts of the silane emulsion, 12-18 parts of the white vaseline, 16-24 parts of the ethyl orthosilicate, 40-60 parts of the absolute ethyl alcohol and 40-60 parts of the deionized water.
3. The preparation method of the durable composite waterproof material for concrete according to claim 1, wherein the ultrasonic dispersion power in the step (3) is 500-600W.
4. The method for preparing a durable composite waterproof material for concrete according to claim 1, wherein the silane emulsion in the step (2) is prepared by the following steps:
(1) adding polyethylene glycol, sorbitan fatty acid ester and dialkyl polyoxyethylene ether into deionized water, and stirring at a rotating speed of 200-250 r/min for 20-30 min under a water bath condition of 50-60 ℃ to obtain an emulsifier mixed solution;
(2) adding vinyl triethoxysilane, octyl triethoxysilane and isobutyl triethoxysilane into the emulsifier mixed solution, placing the mixture into a high-speed stirrer, stirring and emulsifying for 1-2 h at the rotating speed of 2000-3000 r/min under the condition of water bath at the temperature of 60-80 ℃, and cooling at normal temperature to obtain the silane emulsion.
5. The method for preparing a durable composite waterproof material for concrete according to claim 4, wherein the parts by weight of the vinyltriethoxysilane, the octyltriethoxysilane, the isobutyltriethoxysilane, the polyethylene glycol, the sorbitan fatty acid ester, the dodecyl polyoxyethylene ether and the deionized water are respectively 10-20 parts of the vinyltriethoxysilane, 8-16 parts of the octyltriethoxysilane, 6-12 parts of the isobutyltriethoxysilane, 3-6 parts of the polyethylene glycol, 0.4-0.8 part of the sorbitan fatty acid ester, 0.4-0.8 part of the dodecyl polyoxyethylene ether and 100-200 parts of the deionized water.
6. The method for preparing a durable composite waterproof material for concrete according to claim 1, wherein the emulsified paraffin in the step (3) is prepared by the following steps:
(1) placing paraffin in a water bath, stirring at the rotating speed of 120-160 r/min for 30-40 min at the temperature of 85-95 ℃, and preserving heat to obtain liquid paraffin;
(2) adding nonylphenol polyoxyethylene ether and sodium dodecyl sulfate into liquid paraffin, adjusting the pH to 8-9, and stirring at a rotating speed of 200-240 r/min for 20-30 min under a water bath condition of 85-95 ℃ to obtain a paraffin mixed solution;
(2) preheating deionized water to 85-95 ℃, adding the preheated deionized water into the paraffin mixed solution, placing the paraffin mixed solution into a high-speed stirrer, stirring and emulsifying the mixture for 40-60 min at the rotating speed of 1000-1200 r/min under the water bath condition of 80-90 ℃, and cooling the mixture at normal temperature to obtain the emulsified paraffin.
7. The preparation method of the durable composite waterproof material for concrete according to claim 6, wherein the weight parts of the paraffin wax, the nonylphenol polyoxyethylene ether, the sodium dodecyl sulfate and the deionized water are 40-50 parts of paraffin wax, 2.0-2.5 parts of nonylphenol polyoxyethylene ether, 4-5 parts of sodium dodecyl sulfate and 200-250 parts of deionized water respectively.
8. The method for preparing a durable composite waterproof material for concrete according to claim 6, wherein the pH adjustment in the step (2) is performed by using a 10% sodium hydroxide solution by mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010086579.3A CN111732445A (en) | 2020-02-11 | 2020-02-11 | Preparation method of durable composite waterproof material for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010086579.3A CN111732445A (en) | 2020-02-11 | 2020-02-11 | Preparation method of durable composite waterproof material for concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111732445A true CN111732445A (en) | 2020-10-02 |
Family
ID=72645942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010086579.3A Withdrawn CN111732445A (en) | 2020-02-11 | 2020-02-11 | Preparation method of durable composite waterproof material for concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111732445A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608653A (en) * | 2021-01-14 | 2021-04-06 | 成都含蓬娄环保科技有限公司 | Preparation method of organic silicon polyacrylate-based gypsum composite waterproof agent |
| CN113563109A (en) * | 2021-08-11 | 2021-10-29 | 北部湾海洋新材料研究院 | Nano-silyl waterproof emulsion for concrete and preparation method thereof |
| CN113636862A (en) * | 2021-09-06 | 2021-11-12 | 北部湾海洋新材料研究院 | Concrete waterproofing agent and application thereof |
-
2020
- 2020-02-11 CN CN202010086579.3A patent/CN111732445A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112608653A (en) * | 2021-01-14 | 2021-04-06 | 成都含蓬娄环保科技有限公司 | Preparation method of organic silicon polyacrylate-based gypsum composite waterproof agent |
| CN113563109A (en) * | 2021-08-11 | 2021-10-29 | 北部湾海洋新材料研究院 | Nano-silyl waterproof emulsion for concrete and preparation method thereof |
| CN113636862A (en) * | 2021-09-06 | 2021-11-12 | 北部湾海洋新材料研究院 | Concrete waterproofing agent and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111732445A (en) | Preparation method of durable composite waterproof material for concrete | |
| JP7195011B2 (en) | Superhydrophobic coating and its preparation method and application, Superhydrophobic foamed concrete and its preparation method | |
| CN112551943B (en) | Organic silicon slow-release type powder water repellent and preparation method thereof | |
| CN112057904B (en) | Defoaming agent and production process and application thereof | |
| WO2020244263A1 (en) | Graphene oxide-teos/silane composite gel material, preparation method therefor and use thereof | |
| CN111087884A (en) | Preparation method of organosilicon gypsum waterproof agent | |
| CN109679498B (en) | Nano-alumina modified silane waterproofing agent and preparation method and application thereof | |
| CN115043612B (en) | Breathable permeable concrete protective agent and preparation method thereof | |
| CN104829161B (en) | A kind of plaster of Paris waterproofing agent and preparation method thereof | |
| CN104844269A (en) | Inorganic silicate waterproof agent with depth permeability and filling property and preparation method of waterproof agent | |
| CN112624656A (en) | Reinforced organic-inorganic composite concrete external curing agent and preparation method thereof | |
| CN114656190A (en) | Fatty acid concrete hydrophobic pore suppository and preparation method thereof | |
| CN108424487A (en) | A kind of organic-silicon-modified emulsion water-proof agent of desulfurated plaster and preparation method thereof | |
| CN112624662B (en) | High-dispersion organic-inorganic composite powder water repellent and preparation method thereof | |
| WO2021109299A1 (en) | Defoamer used for thin-layer self-leveling mortar, and preparation method therefor | |
| CN113979701B (en) | Cement-based waterproof coating, raw material composition thereof, and preparation method and application thereof | |
| CN108587378A (en) | A kind of impregnating with silane agent and preparation method thereof | |
| CN108424173B (en) | Concrete external curing agent | |
| CN112919849B (en) | Organic-inorganic composite hydrophobic functional material and preparation method thereof | |
| CN112023452B (en) | Defoaming agent for domestic sewage treatment and preparation method thereof | |
| CN110272222B (en) | Solid defoaming agent for self-leveling mortar and preparation method thereof | |
| CN105503264B (en) | A kind of preparation method of foam concrete nanometer strengthener | |
| CN114956867B (en) | Modified hexagonal boron nitride-silane composite emulsion, preparation method and application thereof, and concrete surface protection method | |
| CN106633069A (en) | Preparation method of neutral waterborne organosilicon waterproofing agent | |
| CN112608653A (en) | Preparation method of organic silicon polyacrylate-based gypsum composite waterproof agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201002 |
|
| WW01 | Invention patent application withdrawn after publication |