CN112624656A - Reinforced organic-inorganic composite concrete external curing agent and preparation method thereof - Google Patents
Reinforced organic-inorganic composite concrete external curing agent and preparation method thereof Download PDFInfo
- Publication number
- CN112624656A CN112624656A CN202011600459.7A CN202011600459A CN112624656A CN 112624656 A CN112624656 A CN 112624656A CN 202011600459 A CN202011600459 A CN 202011600459A CN 112624656 A CN112624656 A CN 112624656A
- Authority
- CN
- China
- Prior art keywords
- parts
- reaction kettle
- emulsion
- agent
- paraffin
- 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- Withdrawn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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A reinforced organic-inorganic composite concrete external curing agent and a preparation method thereof are disclosed, wherein the external curing agent is prepared from the following raw materials: 15-20 parts of paraffin, 10-15 parts of microcrystalline wax, 5-10 parts of stearic acid, 10-20 parts of high-molecular emulsion, 5-10 parts of reinforcing component, 5-10 parts of composite emulsifier, 0.2-2 parts of defoaming agent, 0-3 parts of flatting agent and 50-100 parts of deionized water. The polymer emulsion is styrene-acrylic emulsion, pure acrylic emulsion, silicone acrylic emulsion and ethylene-propylene emulsion; the reinforcing component is polyether-calcium silicate hydrate organic-inorganic composite material, triethanolamine, calcium nitrate, calcium formate, urea, sodium silicate, potassium silicate and sodium metasilicate pentahydrate; the compound emulsifier is polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monostearate, sorbitan fatty acid ester, nonylphenol polyoxyethylene ether, etc. Also provides a preparation method of the external curing agent. The invention can improve the effective water retention rate and compressive strength ratio of the concrete.
Description
Technical Field
The invention relates to an external curing agent for concrete, in particular to a reinforced organic-inorganic composite external curing agent for concrete, belonging to the technical field of chemical additives for building materials. The invention also relates to a preparation method of the reinforced organic-inorganic composite concrete external curing agent.
Background
The cement concrete has stronger bearing capacity, better durability and surface machinability, has rich raw material resources and mature stirring manufacturing process, and is a building material which is widely applied and has the largest use amount in the world at present. The performance of concrete is mainly determined by three factors, which are the performances of concrete raw materials, the mix proportion design of concrete and the later maintenance of concrete, wherein the later maintenance of concrete has a decisive influence on the final performance of concrete, the concrete is not maintained timely or thoroughly, the internal free water can be prematurely lost from capillary pores on the surface of the concrete, the internal components can not fully react to form a space for filling the lost free water with sufficient hydration products, the strength of the concrete can not reach the design requirement, and the premature evaporation of the free water can cause the concrete to generate larger shrinkage stress to show as the cracking disease of the concrete. The traditional concrete curing method comprises watering curing, steam curing, plastic film covering curing and the like, but the above methods all have the problems of high labor or energy cost, difficult guarantee of curing effect and the like.
Compared with the traditional curing mode, the curing of the concrete external curing agent can greatly reduce the labor cost and the energy consumption, and meanwhile, the curing degree can be ensured, and the development is rapid in a short period. The concrete external curing agent is generally coated or sprayed on the surface of initial set concrete to form a continuous and compact impervious film on the surface, so that capillary pores on the surface of the concrete are effectively blocked, thus playing a role in preventing free water in the concrete from losing and ensuring the full hydration of internal components of the concrete. The concrete external curing agent mainly comprises an organic type and an inorganic type, the organic type concrete external curing agent mainly comprises paraffin emulsion and styrene-acrylic emulsion, the external curing agent is coated on the surface of concrete, and organic components gradually gather to form a closed organic film along with the evaporation and permeation of water in the emulsion so as to block the loss of water in the concrete; the inorganic curing agent mainly comprises silicate and sulfate, and the curing agent is mainly prepared by providing SiO3 -And SO42-Hydration products of concrete Ca (OH)2Calcium silicate and ettringite colloid are respectively generated by the reaction to block the capillary pores of the concrete so as to prevent the free water in the concrete from losing. However, the external curing agent, organic or inorganic, has various defects, such as high water retention performance of the paraffin emulsion on concrete, but the paraffin emulsion is very easy to dilute, and the diluted emulsion can permeate into the surface of the concrete and be absorbed by the concrete, so that the crystallization of concrete hydration products is influenced, and the strength is reduced; the traditional styrene-acrylic emulsion has thinner film formation, is beneficial to secondary modification of the surface of concrete, but has poorer bonding force between the film and the surface of the concrete, thereby having lower water retention rate; the inorganic external curing agent can densify the surface of the concrete to ensure the early strength of the concrete, but has low film forming rate and extremely unsatisfactory water retention. In order to improve the effective water retention rate and compressive strength ratio of concrete, many researchers have pointed the research direction to organic-inorganic composite concrete external curing agents, i.e., two or more organic and inorganic components are compounded, and the concrete is cured under the synergistic action from different mechanisms.
The related patent documents: CN 108558441A discloses a method for preparing a composite concrete curing agent, wherein organic fluorine is added in a synthetic acrylate emulsion as a functional monomer, fluorocarbon side chains are enriched on the surface, fluorine atoms with the highest electronegativity surround carbon chains to form a spiral structure, which plays a role of hydrophobic property, and simultaneously protects the carbon bonds from being easily destroyed by chemical media, and hydroxyl groups can be utilized to generate chemical bonding with silicon atoms on the surface of concrete, so that the bonding force between the curing agent and the surface of concrete is enhanced, after the curing agent is sprayed on the surface of concrete, polymer emulsion particles are gradually aggregated to finally form a curing film along with the volatilization of water in the curing agent, as the hydroxyl groups and the silicon atoms form covalent bonds, and Si-O combined with methyl silanol is easily combined with Si-O-Si on the surface of concrete, the surface becomes denser, and the compact curing film effectively prevents the water on the surface of concrete from evaporating, the maintenance effect is improved. CN103964893A discloses an early strength wear-resistant concrete curing agent, a preparation method and application thereof, wherein the curing agent comprises the following components (by the total weight of the curing agent): 45-65% of paraffin emulsion, 10-20% of EVA emulsion, 3-8% of organosilicon modified acrylate emulsion, 0.5-1% of stabilizer, 0.03-0.08% of defoaming agent, 0.5-1% of plasticizer, 0.6-1% of film-forming assistant, 0.3-0.8% of quick-hardening component and the balance of water. CN101298373A discloses a novel modified emulsified paraffin concrete curing agent, which comprises 10-20% of vinyl acetate-ethylene high molecular polymer emulsion, 0-5% of organic silicon resin modified acrylic polymer emulsion, 50-75% of paraffin emulsion, 0.1-0.5% of emulsified paraffin colloid dispersant for stabilizing emulsion state, 0.05-0.02% of special defoaming agent for emulsion, and the balance of water.
Some of the technologies are complex in process, and some of the technologies use the organic fluorine monomer which is expensive, so that the cost of the curing agent is increased; and inorganic components such as montmorillonite and illite are subjected to organic surface treatment, although the compatibility with organic components is increased, the viscosity degree of a system is obviously increased, and adverse effects are caused on later-stage packaging, transportation and construction of products.
The above techniques do not provide specific guidance for how to make the concrete external curing agent improve the effective water retention rate and compressive strength ratio of concrete.
Disclosure of Invention
The invention aims to solve the technical problem of providing a reinforced organic-inorganic composite concrete external curing agent which can improve the effective water retention rate and compressive strength ratio of concrete.
Therefore, another technical problem to be solved by the present invention is to provide a method for preparing the reinforced organic-inorganic composite concrete external curing agent.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a reinforced organic-inorganic composite concrete external curing agent (or reinforced organic-inorganic composite concrete curing agent) has the technical scheme that the reinforced organic-inorganic composite concrete external curing agent is prepared from the following components in parts by weight: 15-20 parts of paraffin, 10-15 parts of microcrystalline wax, 5-10 parts of stearic acid, 10-20 parts of high-molecular emulsion, 5-10 parts of reinforcing component, 5-10 parts of composite emulsifier, 0.2-2 parts of defoaming agent, 0-3 parts of flatting agent and 50-100 parts of deionized water. The paraffin is any one of ordinary paraffin (such as 56-grade paraffin) with the melting point range of 48-62 ℃, and the microcrystalline wax is any one of ordinary microcrystalline wax with the melting point range of 60-90 ℃; the polymer emulsion is any one of styrene-acrylic emulsion, pure acrylic emulsion, silicone acrylic emulsion and ethylene-propylene emulsion (vinyl acetate-acrylic emulsion); the reinforcing component is one or a combination of several raw materials of polyether-calcium silicate hydrate organic-inorganic composite material, triethanolamine, calcium nitrate, calcium formate, urea, sodium silicate (solid, instant), potassium silicate and sodium metasilicate pentahydrate, and the proportion is arbitrary when the raw materials are combined (part of the reinforcing component exists in the oil phase of the oil-in-water emulsion, and part of the reinforcing component exists in the water phase of the emulsion); the compound emulsifier is a combination (compounding) of two or more of polyoxyethylene sorbitan monooleate (Tween 80), polyoxyethylene sorbitan monostearate (Tween 60), sorbitan monostearate [ Span60 (Span60) ], sorbitan fatty acid ester (Span-80, Span 80), nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether (AEO), monoglyceride (monoglyceride), sodium dodecyl sulfate and sodium dodecyl sulfate, and the proportion is arbitrary when the compound emulsifier is combined.
The preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 15-20 parts of paraffin, 10-15 parts of microcrystalline wax, 5-10 parts of stearic acid and a raw material with a melting point of less than or equal to 80 ℃ in a reaction kettle, heating to 80-90 ℃, stirring for 5-10min after solid components in the reaction kettle are completely melted, adding 5-10 parts of a composite emulsifier in the reaction kettle, continuing stirring for 10-30min, heating the reaction kettle to 90-95 ℃, slowly dropwise adding 30-70 parts of deionized water into the reaction kettle at 90-95 ℃, wherein the dropwise adding time is 60-180min, and thus obtaining a modified paraffin emulsion; secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 10-20 parts of polymer emulsion into a reaction kettle, stirring and mixing for 30-60min at room temperature, adding 0.2-2 parts of defoaming agent, 0-3 parts of flatting agent and mixed solution into the reaction kettle, dissolving the raw materials with the melting point of more than 80 ℃ in the reinforcing component into 30-70 parts of deionized water to prepare the mixed solution, stirring and mixing for 30-60min at room temperature (mixing uniformly), and obtaining (homogenizing) milky white emulsion which is the reinforced organic-inorganic composite concrete external curing agent.
In the above technical solution, a preferable technical solution may be: the defoaming agent can be one or a combination (compounding) of several raw materials of polysiloxane defoaming agent, polyether defoaming agent (GPES type) and organic silicon defoaming agent (silicone oil), and the mixture ratio of the raw materials is arbitrary when the raw materials are combined. The leveling agent can be one or a combination (compounding) of several raw materials of an organic silicon leveling agent (which can be polydimethylsiloxane), a pure acrylic leveling agent and a fluorocarbon leveling agent, and the proportion of the combination of the several raw materials is arbitrary. In the reinforcing component, the polyether-calcium silicate hydrate organic-inorganic composite material is a nano crystal seed early strength agent, and is a nano composite material formed by mixing a high molecular polymer dispersion liquid and an inorganic calcium-silicon compound, wherein the inorganic calcium-silicon compound is nano crystal seeds generated by an in-situ precipitation reaction of an inorganic calcium raw material and an inorganic siliceous raw material in the presence of the high molecular polymer dispersion liquid, and the nano crystal seed early strength agent is finally obtained; namely, the method is to prepare high molecular polymer dispersion liquid and then prepare the nano seed crystal early strength agent.
The high molecular polymer dispersion liquid is prepared from the following raw materials in parts by weight: 100 parts of polyether macromonomer with the weight-average molecular weight of 2400, namely prenol polyethylene glycol monomethyl ether, 4.4 parts of silane coupling agent, namely vinyl triethoxysilane, 12 parts of unsaturated carboxylic acid, namely acrylic acid, 0.55 part of chain transfer agent, namely mercaptopropionic acid, 0.6 part of initiator and deionized water, wherein the initiator is a combination of 0.1 part of ascorbic acid and 0.5 part of hydrogen peroxide; the preparation method of the high molecular polymer dispersion liquid comprises the following process steps: adding prenol polyethylene glycol monomethyl ether, vinyl triethoxysilane and 67 parts of deionized water into a reaction kettle, starting a stirrer, heating to raise the temperature, and simultaneously dissolving mercaptopropionic acid and part of initiator, namely 0.1 part of ascorbic acid, into 40 parts of deionized water to prepare feed liquid A; adding acrylic acid into 45 parts of deionized water to prepare solution B; when the temperature in the reaction kettle rises to 45 ℃, adding the rest initiator, namely 0.5 part of hydrogen peroxide, to the kettle bottom, simultaneously dropwise adding the material liquid A and the material liquid B, wherein the dropwise adding time of the material liquid A is 120 minutes, the dropwise adding time of the material liquid B is 90 minutes, after the material liquid A and the material liquid B are dropwise added, continuing to perform heat preservation reaction at 45 ℃ for 0.5 hour, and after the reaction is finished, adding deionized water to dilute until the solid content is 40%, thus obtaining the high polymer dispersion liquid.
The preparation method of the nano seed crystal early strength agent comprises the following process steps: adding 10 parts of the high-molecular polymer dispersion liquid and 150 parts of deionized water into a reaction kettle, starting a temperature controller and a stirrer, adjusting the rotating speed of the stirrer to 400rpm, simultaneously dropwise adding a NaOH solution with the mass percentage concentration of 30%, and adjusting the pH to 7.0; weighing 11 parts of inorganic siliceous raw material namely sodium metasilicate pentahydrate, and adding 72 parts of deionized water to prepare feed liquid C; weighing 18 parts of inorganic calcium raw material, namely calcium nitrate tetrahydrate, and adding 41 parts of deionized water to prepare a material liquid D; thirdly, when the temperature in the reaction kettle reaches 20 ℃, simultaneously dripping the C material liquid and the D material liquid, wherein the dripping time of the C material liquid is 110 minutes, the dripping time of the D material liquid is 70 minutes, and 1mol/l HNO is dripped3Adding a NaOH solution with the mass percentage concentration of 30% into the solution or dropwise adding the NaOH solution to maintain the pH value of the solution in the reaction kettle at 11.5-12 until the C material liquidAnd D, after the material liquid is dripped, adding 2 parts of polyethylene glycol, keeping the temperature at 20 ℃, and continuously stirring for 24 hours to finally obtain milky white liquid, namely the nano seed crystal early strength agent.
In the above technical solution, a preferable technical solution may be that: the reinforced organic-inorganic composite concrete external curing agent is prepared from the following components in parts by weight: 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely a styrene-acrylic emulsion, 10 parts of triethanolamine as a reinforcing component, 8 parts of a composite emulsifier, 1 part of a polyether type defoaming agent, 0.5 part of a pure acrylic acid leveling agent and 100 parts of deionized water, wherein the composite emulsifier is a combination of 6.4 parts of nonylphenol polyoxyethylene ether and 1.6 parts of sorbitan fatty acid ester. The preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid and 10 parts of reinforcing component namely triethanolamine into a reaction kettle, heating to 80 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 6.4 parts of nonylphenol polyoxyethylene ether and 1.6 parts of sorbitan fatty acid ester into the reaction kettle, continuously stirring for 15min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 70 parts of 90 ℃ deionized water into the reaction kettle for 80min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of the polymer emulsion into the reaction kettle, stirring and mixing for 30min at room temperature, adding 30 parts of deionized water, 1 part of defoaming agent and 0.5 part of flatting agent into the reaction kettle, and stirring and mixing for 30min at room temperature to obtain homogeneous milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent. The milky white emulsion had no delamination and segregation phenomena, and had a solid content of 28%.
Among the above-described technical solutions, preferred technical solutions may also be the following examples 2, 3, 4, 5.
The reinforced organic-inorganic composite concrete external curing agent prepared by the invention can be directly coated or sprayed on the surface of concrete, and can be diluted by tap water according to a certain proportion (the mass ratio of the external curing agent to the tap water can be 1: 3-5) according to the requirements of use areas and then coated or sprayed.
The inventionThe reinforced organic-inorganic composite concrete external curing agent is provided, the organic part selects paraffin, microcrystalline wax, high-molecular emulsion, stearic acid and organic reinforcing components, the paraffin has better water barrier property, the paraffin emulsion is coated on the surface of concrete, and a compact wax film can be formed on the surface of the concrete along with the evaporation of water in the emulsion, so that the escape of free water in the concrete is effectively prevented; the microcrystalline wax is used for improving the melting point of the paraffin wax, ensuring the integrity of a surface wax film in the concrete curing process in a high-temperature area and preventing the loss of free water caused by discontinuous wax film distribution at high temperature; the stearic acid is used for improving the toughness and water resistance of the paraffin emulsion after film formation and preventing the dissolving effect of high humidity in a humid area on the paraffin film; the organic reinforcing component can play the role of a catalyst in the cement hydration process and can accelerate the concrete surface C3Hydration of a and formation of ettringite. The inorganic part is mainly an inorganic reinforcing component, mainly sodium silicate, calcium nitrate and the like are selected, and can react with concrete surface hydration products to generate calcium silicate and calcium vanadium stone colloid to block concrete pores so as to achieve the effect of thickening the concrete surface. The polyether-calcium silicate hydrate composite material is an organic-inorganic composite nano material and is prepared by copolymerization of a polymer and various inorganic materials, and in the cement hydration process, the addition of the polyether-calcium silicate hydrate composite material can provide crystal nucleus growth points of hydration products and promote early cement silicate mineral phase C3S and C2And the hydration of S effectively reduces the capillary pore distribution on the surface of the concrete, so that the surface of the concrete is more densified. In the curing process, the reinforced organic-inorganic composite concrete external curing agent is firstly contacted with the surface of concrete and carries out a first-step densification reaction because the inorganic reinforcing component is dissolved in the water phase of the external curing agent, the water of the curing agent gradually evaporates along with the curing process, emulsion is broken, the organic reinforcing component in the curing agent begins to be contacted with the surface of the concrete, the secondary densification effect is carried out on the surface of the concrete, and meanwhile, the paraffin and the polymer mixed emulsion are gradually dried on the surface of the concrete to form a continuous and closed water-locking film. The external curing agent has simple production process, low cost and good economic value, and compared with the prior related technologyThe manufacturing cost of the external curing agent is reduced by more than 15%, and the surface strength and the surface wear resistance of the concrete are improved by 20-30%.
In conclusion, the reinforced organic-inorganic composite concrete external curing agent can improve the effective water retention rate and compressive strength ratio of concrete.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: the reinforced organic-inorganic composite concrete external curing agent is prepared from the following components in parts by weight: 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely a styrene-acrylic emulsion, 10 parts of triethanolamine as a reinforcing component, 8 parts of a composite emulsifier, 1 part of a polyether type defoaming agent, 0.5 part of a pure acrylic acid leveling agent and 100 parts of deionized water, wherein the composite emulsifier is a combination of 6.4 parts of nonylphenol polyoxyethylene ether and 1.6 parts of sorbitan fatty acid ester.
The preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid and 10 parts of reinforcing component namely triethanolamine into a reaction kettle, heating to 80 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 6.4 parts of nonylphenol polyoxyethylene ether and 1.6 parts of sorbitan fatty acid ester into the reaction kettle, continuously stirring for 15min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 70 parts of 90 ℃ deionized water into the reaction kettle for 80min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of the polymer emulsion into the reaction kettle, stirring and mixing for 30min at room temperature, adding 30 parts of deionized water, 1 part of defoaming agent and 0.5 part of flatting agent into the reaction kettle, and stirring and mixing for 30min at room temperature to obtain homogeneous milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent. The milky white emulsion had no delamination and segregation phenomena, and had a solid content of 28%.
Example 2: the reinforced organic-inorganic composite concrete external curing agent is prepared from the following components in parts by weight: 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely an ethylene-propylene emulsion, 10 parts of a reinforcing component, a combination of 5 parts of a polyether-calcium silicate hydrate organic-inorganic composite material and 5 parts of triethanolamine, 7 parts of a composite emulsifier, a combination of 2.1 parts of fatty monoglyceride and 4.9 parts of sorbitan monostearate, 1 part of a defoaming agent, namely a polyether type defoaming agent (which can be GPES type), 0.5 part of a leveling agent, namely an organic silicon leveling agent (which can be polydimethylsiloxane), and 100 parts of deionized water.
The preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid, 5 parts of triethanolamine and 5 parts of polyether-calcium silicate hydrate organic-inorganic composite material into a reaction kettle, heating to 85 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 2.1 parts of fatty acid monoglyceride and 4.9 parts of sorbitan monostearate into the reaction kettle, continuously stirring for 30min, heating the temperature of the reaction kettle to 90 ℃, slowly dripping 50 parts of 90 ℃ deionized water into the reaction kettle for 80min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of the polymer emulsion into the reaction kettle, stirring and mixing for 40min at room temperature, adding 1 part of the defoaming agent, 0.5 part of the flatting agent and 50 parts of deionized water into the reaction kettle, and stirring and mixing for 30min at room temperature (uniformly mixing) to obtain homogeneous milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent. The milky white emulsion has no layered segregation phenomenon and has a solid content of 25 percent.
Example 3: the reinforced organic-inorganic composite concrete external curing agent is prepared from the following components in parts by weight: 20 parts of paraffin, 15 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely a pure acrylic emulsion, 10 parts of a reinforcing component, namely a polyether-calcium silicate hydrate organic-inorganic composite material, 7 parts of a composite emulsifier, 2.1 parts of fatty monoglyceride and 4.9 parts of sorbitan monostearate, 1 part of an antifoaming agent, namely an organic silicon antifoaming agent (which can be silicone oil), 0.5 part of a leveling agent, namely a pure acrylic leveling agent, and 100 parts of deionized water.
The preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 20 parts of paraffin, 15 parts of microcrystalline wax, 5 parts of stearic acid and 10 parts of reinforcing component into a reaction kettle, heating to 82 ℃, stirring for 5min after solid components in the reaction kettle are completely melted, adding 2.1 parts of fatty monoglyceride and 4.9 parts of sorbitan monostearate into the reaction kettle, continuously stirring for 15min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 60 parts of 90 ℃ deionized water into the reaction kettle for 100min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of the polymer emulsion into the reaction kettle, stirring and mixing for 30min at room temperature, adding 1 part of the defoaming agent, 0.5 part of the flatting agent and 40 parts of deionized water into the reaction kettle, and stirring and mixing for 50min at room temperature (uniformly mixing) to obtain homogeneous milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent. The milky white emulsion has no layered segregation phenomenon and has a solid content of 25 percent.
Example 4: the reinforced organic-inorganic composite concrete external curing agent is prepared from the following components in parts by weight: 15 parts of paraffin, 15 parts of microcrystalline wax, 6 parts of stearic acid, 18 parts of a high-molecular emulsion, namely a styrene-acrylic emulsion, 10 parts of a reinforcing component, 7 parts of urea and 3 parts of triethanolamine, 10 parts of a composite emulsifier, 2 parts of polyoxyethylene sorbitan monooleate, 5 parts of sorbitan monostearate and 3 parts of fatty acid monoglyceride, 1 part of a defoaming agent, namely a polyether type defoaming agent, 0.5 part of a flatting agent, namely a fluorocarbon type flatting agent, and 100 parts of deionized water.
The preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 15 parts of paraffin, 15 parts of microcrystalline wax, 6 parts of stearic acid and 3 parts of triethanolamine into a reaction kettle, heating to 80 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 2 parts of polyoxyethylene sorbitan monooleate, 5 parts of sorbitan monostearate and 3 parts of fatty acid monoglyceride into the reaction kettle, continuously stirring for 25min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 55 parts of 90 ℃ deionized water into the reaction kettle for 90min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 18 parts of polymer emulsion into the reaction kettle, stirring and mixing for 40min at room temperature, adding 1 part of defoaming agent, 0.5 part of flatting agent and mixed solution into the reaction kettle, dissolving 7 parts of urea into 45 parts of deionized water to prepare the mixed solution, stirring and mixing for 30min at room temperature (mixing uniformly), and obtaining homogeneous milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent. The milky white emulsion had no layered segregation phenomenon and had a solid content of 37.5%.
Example 5: the reinforced organic-inorganic composite concrete external curing agent is prepared from the following components in parts by weight: 15 parts of paraffin, 15 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely a styrene-acrylic emulsion, 10 parts of a reinforcing component, 4 parts of triethanolamine, 3 parts of calcium formate and 3 parts of sodium silicate, 9 parts of a composite emulsifier, 7.2 parts of polyoxyethylene sorbitan monooleate and 1.8 parts of sorbitan fatty acid ester, 1 part of an organic silicon defoamer, 0.5 part of a flatting agent, namely a fluorocarbon flatting agent, and 100 parts of deionized water;
the preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 15 parts of paraffin, 15 parts of microcrystalline wax, 5 parts of stearic acid and 4 parts of triethanolamine into a reaction kettle, heating to 85 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 7.2 parts of polyoxyethylene sorbitan monooleate and 1.8 parts of sorbitan fatty acid ester into the reaction kettle, continuously stirring for 30min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 60 parts of 90 ℃ deionized water into the reaction kettle for 90min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of polymer emulsion into the reaction kettle, stirring and mixing for 35min at room temperature, adding 1 part of defoaming agent, 0.5 part of flatting agent and mixed solution into the reaction kettle, dissolving 3 parts of calcium formate and 3 parts of sodium silicate into 40 parts of deionized water to prepare the mixed solution, and stirring and mixing for 40min at room temperature (mixing uniformly) to obtain homogeneous milky white emulsion which is the reinforced organic-inorganic composite concrete external curing agent. The milky white emulsion has no layered segregation phenomenon, and the solid content is 36 percent.
In the above embodiments 1 to 5, the paraffin wax is any one of ordinary paraffin waxes having a melting point within a range of 48 ℃ to 62 ℃ (for example, 56-grade paraffin wax can be used), and the microcrystalline wax is any one of ordinary microcrystalline waxes having a melting point within a range of 60 ℃ to 90 ℃ (for example, microcrystalline wax having a melting point within a range of 70 ℃ to 75 ℃ can be used).
The following are the experimental part of the invention: comparative example: BO-5001 type concrete external curing agent (emulsion type concrete external curing agent) is sold in the market. The concrete curing agent prepared in the examples and the comparative examples is detected, the prepared concrete curing agent is tested for effective water retention rate and compressive strength ratio according to the national traffic industry standard JT/T522-2004 highway engineering concrete curing agent, the slump of concrete mixture is 40mm +/-10 mm according to the standard requirement during the test, the concrete mixing ratio is shown in Table 1, and the coating amount of the concrete surface curing agent is 200g/m2. The specific test results are shown in table 2.
TABLE 1 concrete mixing ratio for external curing agent test
| Volume of | Cement | Fly ash | Sand | Stone (stone) | Water (W) | Additive agent |
| 1m3 | 270 | 70 | 907 | 983 | 155 | 1.0％-1.7％ |
TABLE 2 characterization and comparison table for external curing agent performance
The invention provides a reinforced organic-inorganic composite concrete external curing agent and a preparation method thereof. The preparation process of the invention is simple: stearic acid and microcrystalline wax are utilized to improve the water resistance and high temperature resistance of the paraffin; the introduction of partial reinforcing component into oil phase of oil-in-water paraffin emulsion can catalyze and accelerate concrete surface C3Hydration of A and formation of ettringite; adding a part of reinforcing components into the water phase of the oil-in-water emulsion, wherein the reinforcing components can react with a hydration product on the surface of concrete to generate calcium silicate and calcium vanadium stone colloids to block pores of the concrete so as to achieve the effect of thickening the surface of the concrete; in particular to the polyether-calcium silicate hydrate organic-inorganic complexA cement reinforcing component (reinforcing component) which provides nucleation sites for hydration products during cement hydration and promotes early cement silicate mineral phase C3S and C2And the hydration of S effectively reduces the capillary pore distribution on the surface of the concrete, so that the surface of the concrete is more densified. After the reinforced organic-inorganic composite concrete external curing agent is coated or sprayed on the surface of concrete, part of the reinforced components are dissolved in the water phase of the external curing agent, so that the reinforced components are firstly contacted with the surface of the concrete and carry out a first-step densification reaction, the water of the curing agent is gradually evaporated along with the curing process, emulsion is broken, part of the reinforced components in the curing agent are contacted with the surface of the concrete, a second-step densification effect is carried out on the surface of the concrete, and meanwhile, the paraffin and the polymer mixed emulsion are gradually dried on the surface of the concrete to form a continuous and closed water-locking film, so that the concrete curing effect is effectively improved. Compared with the prior art, the manufacturing cost of the external curing agent is reduced by more than 15%, and the surface strength and the surface wear resistance of the concrete are improved by 20-30%.
In conclusion, the reinforced organic-inorganic composite concrete external curing agent can improve the effective water retention rate and compressive strength ratio of concrete.
Claims (10)
1. The reinforced organic-inorganic composite concrete external curing agent is characterized by being prepared from the following components in parts by weight: 15-20 parts of paraffin, 10-15 parts of microcrystalline wax, 5-10 parts of stearic acid, 10-20 parts of high-molecular emulsion, 5-10 parts of reinforcing component, 5-10 parts of composite emulsifier, 0.2-2 parts of defoaming agent, 0-3 parts of flatting agent and 50-100 parts of deionized water;
the paraffin is any one of ordinary paraffin with the melting point range of 48-62 ℃, and the microcrystalline wax is any one of ordinary microcrystalline wax with the melting point range of 60-90 ℃; the high molecular emulsion is any one of styrene-acrylic emulsion, pure acrylic emulsion, silicone acrylic emulsion and ethylene-propylene emulsion; the reinforcing component is one or a combination of a plurality of raw materials of polyether-calcium silicate hydrate organic-inorganic composite material, triethanolamine, calcium nitrate, calcium formate, urea, sodium silicate, potassium silicate and sodium metasilicate pentahydrate, and the proportion of the combination of the raw materials is arbitrary; the composite emulsifier is a combination of two or more of polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan monostearate, sorbitan fatty acid ester, nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty monoglyceride, sodium dodecyl sulfate and sodium dodecyl sulfate, and the proportion is arbitrary when the composite emulsifier is combined;
the preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 15-20 parts of paraffin, 10-15 parts of microcrystalline wax, 5-10 parts of stearic acid and a raw material with a melting point of less than or equal to 80 ℃ in a reaction kettle, heating to 80-90 ℃, stirring for 5-10min after solid components in the reaction kettle are completely melted, adding 5-10 parts of a composite emulsifier in the reaction kettle, continuing stirring for 10-30min, heating the reaction kettle to 90-95 ℃, slowly dropwise adding 30-70 parts of deionized water into the reaction kettle at 90-95 ℃, wherein the dropwise adding time is 60-180min, and thus obtaining a modified paraffin emulsion; secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 10-20 parts of polymer emulsion into a reaction kettle, stirring and mixing for 30-60min at room temperature, adding 0.2-2 parts of defoaming agent, 0-3 parts of flatting agent and mixed solution into the reaction kettle, dissolving the raw materials with melting point of more than 80 ℃ in the reinforcing component into 30-70 parts of deionized water to prepare the mixed solution, and stirring and mixing for 30-60min at room temperature to obtain milky white emulsion which is the reinforced organic-inorganic composite concrete external curing agent.
2. The reinforced organic-inorganic composite concrete external curing agent as claimed in claim 1, wherein the defoaming agent is one or a combination of several raw materials selected from the group consisting of polysiloxane defoaming agent, polyether defoaming agent and silicone defoaming agent, and the ratio of the combination of the several raw materials is arbitrary.
3. The reinforced organic-inorganic composite concrete external curing agent according to claim 1, wherein the leveling agent is one or a combination of several raw materials selected from an organosilicon leveling agent, a pure acrylic leveling agent, and a fluorocarbon leveling agent, and the ratio of the combination of the several raw materials is arbitrary.
4. The reinforced organic-inorganic composite concrete external curing agent of claim 1, wherein in the reinforcing component, the polyether-calcium silicate hydrate organic-inorganic composite material is a nano-seed crystal early strength agent, which is a nano-composite material formed by mixing a high molecular polymer dispersion liquid and an inorganic calcium-silicon composite, wherein the inorganic calcium-silicon composite is a nano-seed crystal formed by an in-situ precipitation reaction of an inorganic calcium raw material and an inorganic siliceous raw material in the presence of the high molecular polymer dispersion liquid, and the nano-seed crystal early strength agent is finally obtained; namely, firstly preparing high molecular polymer dispersion liquid, and then preparing the nano seed crystal early strength agent:
the high molecular polymer dispersion liquid is prepared from the following raw materials in parts by weight: 100 parts of polyether macromonomer with the weight-average molecular weight of 2400, namely prenol polyethylene glycol monomethyl ether, 4.4 parts of silane coupling agent, namely vinyl triethoxysilane, 12 parts of unsaturated carboxylic acid, namely acrylic acid, 0.55 part of chain transfer agent, namely mercaptopropionic acid, 0.6 part of initiator and deionized water, wherein the initiator is a combination of 0.1 part of ascorbic acid and 0.5 part of hydrogen peroxide; the preparation method of the high molecular polymer dispersion liquid comprises the following process steps: adding prenol polyethylene glycol monomethyl ether, vinyl triethoxysilane and 67 parts of deionized water into a reaction kettle, starting a stirrer, heating to raise the temperature, and simultaneously dissolving mercaptopropionic acid and part of initiator, namely 0.1 part of ascorbic acid, into 40 parts of deionized water to prepare feed liquid A; adding acrylic acid into 45 parts of deionized water to prepare solution B; when the temperature in the reaction kettle rises to 45 ℃, adding the rest initiator, namely 0.5 part of hydrogen peroxide, to the kettle bottom, simultaneously dropwise adding the material liquid A and the material liquid B, wherein the dropwise adding time of the material liquid A is 120 minutes, the dropwise adding time of the material liquid B is 90 minutes, after the material liquid A and the material liquid B are dropwise added, continuing to perform heat preservation reaction at 45 ℃ for 0.5 hour, and after the reaction is finished, adding deionized water to dilute until the solid content is 40%, thus obtaining the high-molecular polymer dispersion liquid;
the preparation method of the nano seed crystal early strength agent comprises the following process steps: adding 10 parts of the high molecular polymer dispersion liquid and 150 parts of deionized water into a reaction kettle,starting a temperature controller and a stirrer, adjusting the rotating speed of the stirrer to 400rpm, simultaneously dropwise adding a NaOH solution with the mass percentage concentration of 30%, and adjusting the pH value to 7.0; weighing 11 parts of inorganic siliceous raw material namely sodium metasilicate pentahydrate, and adding 72 parts of deionized water to prepare feed liquid C; weighing 18 parts of inorganic calcium raw material, namely calcium nitrate tetrahydrate, and adding 41 parts of deionized water to prepare a material liquid D; thirdly, when the temperature in the reaction kettle reaches 20 ℃, simultaneously dripping the C material liquid and the D material liquid, wherein the dripping time of the C material liquid is 110 minutes, the dripping time of the D material liquid is 70 minutes, and 1mol/l HNO is dripped3And (3) dropwise adding a solution or dropwise adding a NaOH solution with the mass percentage concentration of 30% to maintain the pH value of the solution in the reaction kettle at 11.5-12, after the dropwise adding of the material liquid C and the material liquid D is finished, adding 2 parts of polyethylene glycol, keeping the temperature at 20 ℃ and continuously stirring for 24 hours to finally obtain a milky liquid, namely the nano seed crystal early strength agent.
5. The reinforced organic-inorganic composite concrete external curing agent as claimed in claim 1, which is characterized by being prepared from the following components in parts by weight: 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely a styrene-acrylic emulsion, 10 parts of triethanolamine as a reinforcing component, 8 parts of a composite emulsifier, 1 part of a polyether type defoaming agent, 0.5 part of a pure acrylic acid leveling agent and 100 parts of deionized water, wherein the composite emulsifier is a combination of 6.4 parts of nonylphenol polyoxyethylene ether and 1.6 parts of sorbitan fatty acid ester;
the preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid and 10 parts of reinforcing component namely triethanolamine into a reaction kettle, heating to 80 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 6.4 parts of nonylphenol polyoxyethylene ether and 1.6 parts of sorbitan fatty acid ester into the reaction kettle, continuously stirring for 15min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 70 parts of 90 ℃ deionized water into the reaction kettle for 80min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of the polymer emulsion into the reaction kettle, stirring and mixing for 30min at the room temperature, adding 30 parts of deionized water, 1 part of defoaming agent and 0.5 part of flatting agent into the reaction kettle, and stirring and mixing for 30min at the room temperature to obtain milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent.
6. The reinforced organic-inorganic composite concrete external curing agent as claimed in claim 1, which is characterized by being prepared from the following components in parts by weight: 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely an ethylene-propylene emulsion, 10 parts of a reinforcing component, 5 parts of a combination of a polyether-calcium silicate hydrate organic-inorganic composite material and 5 parts of triethanolamine, 7 parts of a composite emulsifier, 2.1 parts of a combination of fatty acid monoglyceride and 4.9 parts of sorbitan monostearate, 1 part of a defoaming agent, namely a polyether type defoaming agent, 0.5 part of a leveling agent, namely an organic silicon leveling agent, and 100 parts of deionized water;
the preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 20 parts of paraffin, 10 parts of microcrystalline wax, 5 parts of stearic acid, 5 parts of triethanolamine and 5 parts of polyether-calcium silicate hydrate organic-inorganic composite material into a reaction kettle, heating to 85 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 2.1 parts of fatty acid monoglyceride and 4.9 parts of sorbitan monostearate into the reaction kettle, continuously stirring for 30min, heating the temperature of the reaction kettle to 90 ℃, slowly dripping 50 parts of 90 ℃ deionized water into the reaction kettle for 80min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of the polymer emulsion into the reaction kettle, stirring and mixing for 40min at the room temperature, adding 1 part of the defoaming agent, 0.5 part of the flatting agent and 50 parts of deionized water into the reaction kettle, and stirring and mixing for 30min at the room temperature to obtain milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent.
7. The reinforced organic-inorganic composite concrete external curing agent as claimed in claim 1, which is characterized by being prepared from the following components in parts by weight: 20 parts of paraffin, 15 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely a pure acrylic emulsion, 10 parts of a reinforcing component, namely a polyether-calcium silicate hydrate organic-inorganic composite material, 7 parts of a composite emulsifier, 2.1 parts of fatty monoglyceride and 4.9 parts of sorbitan monostearate, 1 part of an antifoaming agent, namely an organic silicon antifoaming agent, 0.5 part of a leveling agent, namely a pure acrylic leveling agent, and 100 parts of deionized water;
the preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 20 parts of paraffin, 15 parts of microcrystalline wax, 5 parts of stearic acid and 10 parts of reinforcing component into a reaction kettle, heating to 82 ℃, stirring for 5min after solid components in the reaction kettle are completely melted, adding 2.1 parts of fatty monoglyceride and 4.9 parts of sorbitan monostearate into the reaction kettle, continuously stirring for 15min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 60 parts of 90 ℃ deionized water into the reaction kettle for 100min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of the polymer emulsion into the reaction kettle, stirring and mixing for 30min at room temperature, adding 1 part of defoaming agent, 0.5 part of flatting agent and 40 parts of deionized water into the reaction kettle, and stirring and mixing for 50min at room temperature to obtain milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent.
8. The reinforced organic-inorganic composite concrete external curing agent as claimed in claim 1, which is characterized by being prepared from the following components in parts by weight: 15 parts of paraffin, 15 parts of microcrystalline wax, 6 parts of stearic acid, 18 parts of a high-molecular emulsion (namely styrene-acrylic emulsion), 10 parts of a reinforcing component, 7 parts of urea and 3 parts of triethanolamine, 10 parts of a composite emulsifier, 2 parts of polyoxyethylene sorbitan monooleate, 5 parts of sorbitan monostearate and 3 parts of fatty acid monoglyceride, 1 part of a defoaming agent (namely polyether type defoaming agent), 0.5 part of a flatting agent (namely fluorocarbon flatting agent) and 100 parts of deionized water;
the preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 15 parts of paraffin, 15 parts of microcrystalline wax, 6 parts of stearic acid and 3 parts of triethanolamine into a reaction kettle, heating to 80 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 2 parts of polyoxyethylene sorbitan monooleate, 5 parts of sorbitan monostearate and 3 parts of fatty acid monoglyceride into the reaction kettle, continuously stirring for 25min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 55 parts of 90 ℃ deionized water into the reaction kettle for 90min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 18 parts of polymer emulsion into the reaction kettle, stirring and mixing for 40min at room temperature, adding 1 part of defoaming agent, 0.5 part of flatting agent and mixed solution into the reaction kettle, dissolving 7 parts of urea into 45 parts of deionized water to prepare the mixed solution, stirring and mixing for 30min at room temperature to obtain milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent.
9. The reinforced organic-inorganic composite concrete external curing agent as claimed in claim 1, which is characterized by being prepared from the following components in parts by weight: 15 parts of paraffin, 15 parts of microcrystalline wax, 5 parts of stearic acid, 20 parts of a high-molecular emulsion, namely a styrene-acrylic emulsion, 10 parts of a reinforcing component, 4 parts of triethanolamine, 3 parts of calcium formate and 3 parts of sodium silicate, 9 parts of a composite emulsifier, 7.2 parts of polyoxyethylene sorbitan monooleate and 1.8 parts of sorbitan fatty acid ester, 1 part of an organic silicon defoamer, 0.5 part of a fluorocarbon leveling agent and 100 parts of deionized water;
the preparation method of the reinforced organic-inorganic composite concrete external curing agent comprises the following process steps: adding 15 parts of paraffin, 15 parts of microcrystalline wax, 5 parts of stearic acid and 4 parts of triethanolamine into a reaction kettle, heating to 85 ℃, stirring for 10min after solid components in the reaction kettle are completely melted, adding 7.2 parts of polyoxyethylene sorbitan monooleate and 1.8 parts of sorbitan fatty acid ester into the reaction kettle, continuously stirring for 30min, heating the temperature of the reaction kettle to 90 ℃, slowly dropwise adding 60 parts of 90 ℃ deionized water into the reaction kettle for 90min to obtain a modified paraffin emulsion; and secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 20 parts of polymer emulsion into the reaction kettle, stirring and mixing for 35min at the room temperature, adding 1 part of defoaming agent, 0.5 part of flatting agent and mixed solution into the reaction kettle, dissolving 3 parts of calcium formate and 3 parts of sodium silicate into 40 parts of deionized water to prepare the mixed solution, and stirring and mixing for 40min at the room temperature to obtain milky white emulsion, namely the reinforced organic-inorganic composite concrete external curing agent.
10. The preparation method of the reinforced organic-inorganic composite concrete external curing agent of claim 1 is characterized by comprising the following process steps: adding 15-20 parts of paraffin, 10-15 parts of microcrystalline wax, 5-10 parts of stearic acid and a raw material with a melting point of less than or equal to 80 ℃ in a reaction kettle, heating to 80-90 ℃, stirring for 5-10min after solid components in the reaction kettle are completely melted, adding 5-10 parts of a composite emulsifier in the reaction kettle, continuing stirring for 10-30min, heating the reaction kettle to 90-95 ℃, slowly dropwise adding 30-70 parts of deionized water into the reaction kettle at 90-95 ℃, wherein the dropwise adding time is 60-180min, and thus obtaining a modified paraffin emulsion; secondly, when the temperature of the paraffin emulsion is reduced to room temperature, adding 10-20 parts of polymer emulsion into a reaction kettle, stirring and mixing for 30-60min at room temperature, adding 0.2-2 parts of defoaming agent, 0-3 parts of flatting agent and mixed solution into the reaction kettle, dissolving the raw materials with melting point of more than 80 ℃ in the reinforcing component into 30-70 parts of deionized water to prepare the mixed solution, and stirring and mixing for 30-60min at room temperature to obtain milky white emulsion which is the reinforced organic-inorganic composite concrete external curing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011600459.7A CN112624656A (en) | 2020-12-30 | 2020-12-30 | Reinforced organic-inorganic composite concrete external curing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011600459.7A CN112624656A (en) | 2020-12-30 | 2020-12-30 | Reinforced organic-inorganic composite concrete external curing agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112624656A true CN112624656A (en) | 2021-04-09 |
Family
ID=75286359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011600459.7A Withdrawn CN112624656A (en) | 2020-12-30 | 2020-12-30 | Reinforced organic-inorganic composite concrete external curing agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112624656A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185885A (en) * | 2021-06-18 | 2021-07-30 | 佛山市顺德区巴德富实业有限公司 | High-permeability interface reinforcing agent and preparation method thereof |
| CN113416091A (en) * | 2021-07-05 | 2021-09-21 | 江西省圣源商品混凝土有限公司 | Concrete curing agent |
| CN114274336A (en) * | 2022-01-12 | 2022-04-05 | 郑州科技学院 | Precast concrete slab maintenance system and maintenance method |
| CN115073048A (en) * | 2022-06-16 | 2022-09-20 | 中国科学院兰州化学物理研究所 | Composite concrete curing agent and preparation method and application thereof |
| CN115259897A (en) * | 2022-07-07 | 2022-11-01 | 山西佳维新材料股份有限公司 | Organic-inorganic composite concrete curing agent, preparation method and concrete curing method |
| CN116286161A (en) * | 2023-02-15 | 2023-06-23 | 中国建筑第八工程局有限公司 | Demolding and curing integrated agent, synthesis and application method |
| CN116554947A (en) * | 2023-05-12 | 2023-08-08 | 四川砼兴源建材科技有限公司 | Surface-enhanced concrete water-based release agent and preparation method thereof |
-
2020
- 2020-12-30 CN CN202011600459.7A patent/CN112624656A/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185885A (en) * | 2021-06-18 | 2021-07-30 | 佛山市顺德区巴德富实业有限公司 | High-permeability interface reinforcing agent and preparation method thereof |
| CN113185885B (en) * | 2021-06-18 | 2022-06-07 | 佛山市顺德区巴德富实业有限公司 | High-permeability interface reinforcing agent |
| CN113416091A (en) * | 2021-07-05 | 2021-09-21 | 江西省圣源商品混凝土有限公司 | Concrete curing agent |
| CN113416091B (en) * | 2021-07-05 | 2022-07-12 | 江西省圣源商品混凝土有限公司 | Concrete curing agent |
| CN114274336A (en) * | 2022-01-12 | 2022-04-05 | 郑州科技学院 | Precast concrete slab maintenance system and maintenance method |
| CN114274336B (en) * | 2022-01-12 | 2024-03-15 | 郑州科技学院 | Precast concrete board maintenance system and maintenance method |
| CN115073048A (en) * | 2022-06-16 | 2022-09-20 | 中国科学院兰州化学物理研究所 | Composite concrete curing agent and preparation method and application thereof |
| CN115073048B (en) * | 2022-06-16 | 2022-12-27 | 中国科学院兰州化学物理研究所 | Composite concrete curing agent and preparation method and application thereof |
| CN115259897A (en) * | 2022-07-07 | 2022-11-01 | 山西佳维新材料股份有限公司 | Organic-inorganic composite concrete curing agent, preparation method and concrete curing method |
| CN115259897B (en) * | 2022-07-07 | 2023-06-20 | 山西佳维新材料股份有限公司 | Organic-inorganic composite concrete curing agent, preparation method and concrete curing method |
| CN116286161A (en) * | 2023-02-15 | 2023-06-23 | 中国建筑第八工程局有限公司 | Demolding and curing integrated agent, synthesis and application method |
| CN116554947A (en) * | 2023-05-12 | 2023-08-08 | 四川砼兴源建材科技有限公司 | Surface-enhanced concrete water-based release agent and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112624656A (en) | Reinforced organic-inorganic composite concrete external curing agent and preparation method thereof | |
| CN107628788B (en) | Cement-based waterproof material for repairing concrete cracks and preparation method thereof | |
| CN113024189B (en) | High-toughness high-cohesiveness C250 ultrahigh-strength hybrid fiber concrete and preparation method thereof | |
| CN102320860A (en) | Concrete-curing agent applicable to strong-wind arid area and preparation method thereof | |
| CN114656190A (en) | Fatty acid concrete hydrophobic pore suppository and preparation method thereof | |
| CN113429149A (en) | High early strength alkali-free liquid accelerator and preparation method thereof | |
| CN113416092A (en) | Double-component nano sol type liquid hardening agent and preparation method thereof | |
| CN116178047B (en) | Concrete surface hole sealing agent, preparation method thereof and concrete | |
| CN110627451B (en) | Pervious concrete | |
| CN1118437C (en) | Fly ash microconcrete brick and its preparation method | |
| CN116854440A (en) | Sand washing sludge baking-free brick and preparation process thereof | |
| KR20040043782A (en) | Method of preparing waterproof admixture for waterproofing and anticorrosive treatment of concrete, and waterproof admixture prepared thereby | |
| CN113185209B (en) | High-toughness high-cohesiveness C220 ultrahigh-strength hybrid fiber concrete and preparation method thereof | |
| CN113024142B (en) | High-toughness high-cohesiveness C210 ultrahigh-strength hybrid fiber concrete and preparation method thereof | |
| CN113185211B (en) | High-strength fiber concrete with high toughness and high cohesiveness and C120 strength and preparation method thereof | |
| CN113233832A (en) | High-toughness high-cohesiveness C180-strength ultrahigh-strength fiber concrete and preparation method thereof | |
| CN118420264B (en) | High-dispersion stable nano calcium silicate hydrate crystal nucleus early strength agent and preparation method and application thereof | |
| CN108911573A (en) | Steel fiber reinforced concrete special additive | |
| CN113582720B (en) | High-water-retention uvioresistant concrete external curing agent and preparation method thereof | |
| CN113024184B (en) | High-toughness high-cohesiveness C240 ultrahigh-strength hybrid fiber concrete and preparation method thereof | |
| CN115974499B (en) | 3D printed mortar material, preparation method thereof and 3D printing method of mortar | |
| CN118545936B (en) | Low-viscosity easy-pump type fluorine-free alkali-free liquid accelerator and preparation method thereof | |
| CN117567175A (en) | High-water-retention type organosilicon concrete external curing agent and preparation method thereof | |
| CN113233862B (en) | High-toughness high-cohesiveness C230 ultrahigh-strength hybrid fiber concrete and preparation method thereof | |
| CN114956712B (en) | LC40 full-light pumping ceramsite concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210409 |