CN114907908B - Concrete surface mold release agent and preparation method and application mode thereof - Google Patents
Concrete surface mold release agent and preparation method and application mode thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/388—Treating surfaces of moulds, cores, or mandrels to prevent sticking with liquid material, e.g. lubricating
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/287—Partial esters
- C10M2207/289—Partial esters containing free hydroxy groups
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/108—Polyethers, i.e. containing di- or higher polyoxyalkylene groups etherified
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/109—Polyethers, i.e. containing di- or higher polyoxyalkylene groups esterified
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/08—Amides
- C10M2215/082—Amides containing hydroxyl groups; Alkoxylated derivatives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/04—Detergent property or dispersant property
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/18—Anti-foaming property
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/36—Release agents or mold release agents
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Abstract
The invention discloses a concrete surface demolding agent, a preparation method and an application mode thereof, relates to the field of concrete demolding, and can improve the molding quality of concrete in demolding. The oil-free cleaning agent comprises, by mass, 70-80% of refined mineral oil, 3-5% of sodium cocoate, 3-5% of petroleum sodium sulfonate, 7-8% of span, 3-4% of tween, 4-6% of coconut oil fatty acid diethanolamide and 3-4% of deionized water. The invention can reduce honeycomb-shaped holes generated by bubble accumulation on the surface of the demolded concrete, simultaneously ensure the separation of the concrete and the mold, ensure that the surface of the concrete is smooth enough and has no unfilled corners, avoid the subsequent secondary processing on the surface of the concrete, and reduce the expenditure of labor cost and the pollution to the environment.
Description
Technical Field
The invention relates to the field of concrete demoulding, in particular to a concrete surface demoulding agent, a preparation method and an application mode thereof.
Background
In the existing concrete pouring construction, a mold release agent is often required to be coated on the surface of a mold so that the subsequent concrete can be smoothly separated from the surface of the mold. However, the existing release agent has certain viscosity after being released, so that the concrete is unfilled after being released, and the forming quality of the concrete is influenced; in addition, most of the release agents on the existing market are oily release agents, air bubbles of concrete in a mold are blocked by the release agents and are difficult to discharge, a large number of honeycomb-shaped holes exist in the surface of the concrete after demolding, the molding quality of the concrete is affected, at the moment, a large amount of manual work is needed to perform secondary processing on the surface of the concrete, and the environmental pollution is caused while the labor cost is increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided is a concrete surface mold release agent which can improve the molding quality when the concrete is demolded.
The invention is realized by the following technical scheme:
the concrete surface demolding agent comprises the following raw materials in parts by weight:
70 to 80 percent of refined mineral oil,
3 to 5 percent of sodium cocoate,
3 to 5 percent of petroleum sodium sulfonate,
7 to 8 percent of span,
3-4% of tween,
4 to 6 percent of coconut oil fatty acid diethanolamide,
3-4% of deionized water.
Wherein the refined mineral oil refers to a mixture of refined liquid hydrocarbons obtained from petroleum.
The refined mineral oil with low viscosity is selected, and other raw materials can be used as a surfactant or an emulsifier to be combined with the surfactant or the emulsifier, so that the stability of the oil is improved, a large amount of water is not required to be added to improve the emulsification degree of the oil, the concentration of the oil is higher, the oil is more convenient for workers to use, and the transportation cost is saved.
In a specific use stage, the concrete surface demolding agent can be uniformly attached to the surface of a mold, and can disperse and overflow bubbles generated in the vibrating process of concrete, so that honeycomb-shaped holes generated by bubble accumulation on the surface of the demolded concrete are reduced; meanwhile, the separation of the concrete and the mould is ensured, so that the surface of the concrete is smooth enough and has no unfilled corners, the subsequent secondary processing of the surface of the concrete is avoided, and the expenditure of labor cost and the pollution to the environment are reduced.
Optionally, the raw materials in parts by mass are as follows:
73.5 percent of refined mineral oil,
3.5 percent of sodium cocoate,
4 percent of petroleum sodium sulfonate,
the content of the span is 8 percent,
3 percent of tween,
5 percent of coconut oil fatty acid diethanolamide,
3 percent of deionized water.
Optionally, the refined mineral oil is 26# white oil, and has a flash point of 164-223 deg.C and a kinematic viscosity of 5.7-46mm2/s at 40 deg.C.
Optionally, the span is span 80.
Optionally, the tween is tween 80.
A preparation method of a concrete surface mold release agent is used for preparing the concrete surface mold release agent in any one of the schemes, and comprises the following steps:
adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 35-45 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
and (3) dropwise adding deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 25-35 minutes to obtain the concrete surface demolding agent.
Optionally, the preset temperature is 40 ℃.
Optionally, the preparation method of the sodium cocoate comprises the following steps: obtained after saponification of coconut oil acid and sodium hydroxide at a temperature of 60-80 ℃, wherein the mole ratio of coconut oil acid to sodium hydroxide is 1.
An application mode of a concrete surface demolding agent is that the concrete surface demolding agent in any scheme is diluted to obtain a diluent;
and filling the diluent into a sprayer, and spraying the diluent on the surface of the mold through the sprayer.
Optionally, in the process of obtaining the diluent, the mass ratio of the concrete surface mold release agent to water is 1:5.
The invention has the following advantages and beneficial effects:
the concrete surface demolding agent provided by the invention is prepared by mixing the refined mineral oil, sodium cocoate, sodium petroleum sulfonate, span, tween, coconut oil fatty acid diethanolamide and deionized water as raw materials, can reduce honeycomb-shaped holes generated by bubble accumulation on the surface of demolded concrete, and simultaneously ensures the separation of the concrete and a mold, so that the surface of the concrete is smooth enough and has no unfilled corners, the subsequent secondary processing on the surface of the concrete is avoided, and the expenditure of labor cost and the pollution to the environment are reduced.
Detailed Description
Example 1:
the concrete surface mold release agent comprises the following raw materials in parts by weight:
73.5 percent of refined mineral oil,
3.5 percent of sodium cocoate,
4 percent of petroleum sodium sulfonate,
the content of the span is 8 percent,
3 percent of tween,
5 percent of coconut oil fatty acid diethanolamide,
3% of deionized water.
Wherein the refined mineral oil is 26# white oil with flash point of 164-223 deg.C and kinematic viscosity of 5.7-46mm2/s at 40 deg.C.
The preparation method comprises the following steps:
s1: adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 40 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
s2: adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
s3: adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
s4: adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
s5: and slowly and uniformly dripping deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 30 minutes to obtain the concrete surface demolding agent in the embodiment 1.
Example 2
The concrete surface mold release agent comprises the following raw materials in parts by weight:
70 percent of refined mineral oil,
3 percent of sodium cocoate,
5 percent of petroleum sodium sulfonate,
the content of the span is 8 percent,
4 percent of tween,
6 percent of coconut oil fatty acid diethanolamide,
and 4% of deionized water.
Wherein the refined mineral oil is 26# white oil with flash point of 164-223 deg.C and kinematic viscosity of 5.7-46mm2/s at 40 deg.C.
The preparation method comprises the following steps:
s1: at a constant temperature of 40 ℃, adding sodium cocoate and refined mineral oil into a stirring tank, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
s2: adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
s3: adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
s4: adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
s5: and slowly and uniformly dripping deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 30 minutes to obtain the concrete surface demolding agent in the embodiment 2.
Example 3
The concrete surface mold release agent comprises the following raw materials in parts by weight:
77 percent of refined mineral oil,
3 percent of sodium cocoate,
3 percent of petroleum sodium sulfonate,
the content of the span is 7 percent,
3 percent of tween,
4 percent of coconut oil fatty acid diethanolamide,
3% of deionized water.
Wherein the refined mineral oil is 26# white oil with flash point of 164-223 deg.C and kinematic viscosity of 5.7-46mm2/s at 40 deg.C.
The preparation method comprises the following steps:
s1: adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 40 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
s2: adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
s3: adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
s4: adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
s5: and slowly and uniformly dropping deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 30 minutes to obtain the concrete surface mold release agent in the embodiment 3.
Example 4
The concrete surface mold release agent comprises the following raw materials in parts by weight:
77 percent of refined mineral oil,
3 percent of sodium cocoate,
3 percent of petroleum sodium sulfonate,
the content of the span is 7 percent,
3 percent of tween,
4 percent of coconut oil fatty acid diethanolamide,
3% of deionized water.
Wherein the refined mineral oil is 150SN base oil, and the kinematic viscosity of the refined mineral oil at 40 ℃ is 17.68mm2/s.
The preparation method comprises the following steps:
s1: adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 40 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
s2: adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
s3: adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
s4: adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
s5: and slowly and uniformly dropping deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 30 minutes to obtain the concrete surface mold release agent in the embodiment 4.
Comparative example 1
The concrete surface mold release agent comprises the following raw materials in parts by weight:
73.5 percent of refined mineral oil,
3.5 percent of sodium cocoate,
4 percent of petroleum sodium sulfonate,
the content of the span is 8 percent,
3 percent of tween,
5 percent of coconut oil fatty acid diethanolamide,
3 percent of deionized water.
Wherein the refined mineral oil is 26# white oil with flash point of 164-223 deg.C and kinematic viscosity of 5.7-46mm2/s at 40 deg.C.
The preparation method comprises the following steps:
s1: adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 20 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
s2: adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
s3: adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
s4: adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
s5: and (3) dropwise adding deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 30 minutes to obtain the product in the comparative example 1.
Comparative example 2
The concrete surface mold release agent comprises the following raw materials in parts by weight:
65.5 percent of refined mineral oil,
8 percent of sodium cocoate,
4 percent of petroleum sodium sulfonate,
the content of the span is 8 percent,
3 percent of tween,
5 percent of coconut oil fatty acid diethanolamide,
3% of deionized water.
Wherein the refined mineral oil is 26# white oil with flash point of 164-223 deg.C and kinematic viscosity of 5.7-46mm2/s at 40 deg.C.
The preparation method comprises the following steps:
s1: adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 40 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
s2: adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
s3: adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
s4: adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
s5: and slowly and uniformly dropping deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 30 minutes to obtain the concrete surface mold release agent in the comparative example 2.
Comparative example 3
The concrete surface mold release agent comprises the following raw materials in parts by weight:
71 percent of refined mineral oil,
3 percent of sodium cocoate,
4 percent of petroleum sodium sulfonate,
the content of the span is 8 percent,
3 percent of tween,
8 percent of coconut oil fatty acid diethanolamide,
3% of deionized water.
Wherein the refined mineral oil is 26# white oil with flash point of 164-223 deg.C and kinematic viscosity of 5.7-46mm2/s at 40 deg.C.
The preparation method comprises the following steps:
s1: adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 40 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
s2: adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
s3: adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
s4: adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
s5: and slowly and uniformly dripping deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 30 minutes to obtain the concrete surface demolding agent in the comparative example 3.
In example 1, the concrete surface release agent was experimentally compared with a commercially available oil-based release agent (oil and fat type AP 2) and a commercially available water-based release agent (HD-6A water-based release agent), and the results of the experimental comparison are shown in table 1:
TABLE 1
| Example 1 | Commercially available oily mold release agent | Commercially available aqueous mold release agent | |
| Appearance of the product | Brownish yellow transparent liquid | Brownish black liquid | Milk white paste |
| Dilution ratio (Release agent: water) | 1：5 | Is insoluble in water | 1：3 |
| Easy demoulding | Easy | Easy | Easy |
| Difficulty and easiness in mold cleaning | Easy | Easy | Is difficult to |
| Surface bubbles | Is free of | Much more | Is less |
| Surface smoothness | Is smooth and smooth | Is smooth and smooth | Is relatively smooth |
| Strength of concrete | Enhancement | Enhancement | Slightly descend |
| 24 hours after dilution | Without delamination | / | Delamination of layers |
As is apparent from table 1, the concrete surface release agent of example 1 is easier to clean than conventional commercially available oil-based release agents and commercially available water-based release agents, and the surface of the concrete after release is free from air bubbles and smooth. That is, the concrete surface demolding agent in this embodiment 1 can realize the concrete demolding very easily, and the concrete surface after the demolding is smooth and gapless, and does not have the honeycomb type hole that produces because of the bubble is piled up, and the concrete shaping effect is splendid this moment, has avoided follow-up secondary operation to the concrete surface, reduces the expenditure of cost of labor and the pollution to the environment.
In addition, compared with the existing commercial water-based release agent, the concrete surface release agent in the embodiment 1 has stronger concentration strength, so that workers can prepare more diluent for releasing by adding water in a construction site, the construction of the worker site is facilitated, and the required transportation cost is reduced. Meanwhile, the concrete surface release agent in the embodiment 1 can not generate the phenomenon of delamination after being diluted for 24 hours, so the service life of the concrete surface release agent after being diluted is obviously longer than that of the commercial water-based release agent.
In addition, the concrete surface release agents of examples 1 to 4 were experimentally compared with the products of comparative examples 1 to 3, and the experimental comparison results are shown in table 2:
TABLE 2
It can be seen that examples 1 to 4 have more excellent mold release effects than comparative examples 1 to 3, in which the mold release effect exhibited by the concrete surface mold release agent in example 1 is the best, while the mold release effect exhibited by the concrete surface mold release agent in examples 2 to 4 is slightly weaker, but still has more excellent mold release effects than the existing commercially available oil-based mold release agent and commercially available water-based mold release agent.
Among them, it can be seen from the comparison between example 4 and example 1 that example 1 is free from delamination after 24 hours of dilution and the surface bubbling and surface smoothness are significantly better than example 4, and example 1 is different from example 4 in that 26# white oil is used as the refined mineral oil in example 1 and 150SN base oil is used as the refined mineral oil in example 4, and thus it can be seen that the 26# white oil provides a better effect in the present concrete surface mold release agent.
It is apparent from comparison between comparative example 1 and example 1 that the demolding effect of the concrete surface demolding agent is seriously affected if the constant temperature is low during the preparation process, and the solution in the stirring tank is not uniform enough during the stirring process due to the temperature reduction, so that it can be seen that in the concrete surface demolding agent, uniform stirring of the raw materials is a key point for ensuring the demolding effect, and therefore, in the preparation method of the concrete surface demolding agent, the other raw materials are required to be added after uniform stirring.
Among them, as is apparent from comparison between comparative examples 2 and 3 and example 1, when the amount of refined mineral oil is too small and the amount of other raw materials is too large, the stripping effect of the concrete surface stripper is reduced accordingly, and delamination may occur during standing to affect the use thereof. Therefore, the concrete surface release agent requires relatively strict quality of each raw material.
In an application manner of the concrete surface mold release agent in any one of the above embodiments, the concrete surface mold release agent may be mixed with water according to a mass ratio of 1:5, and then stirred and diluted to form a low-viscosity diluent (in embodiments 1 to 3, the diluent is a milky liquid), and at this time, the diluent may be loaded into a sprayer and sprayed on a surface of a mold in a spraying manner, so that the diluent can be more uniformly distributed on the surface of the mold, and thus a mold release effect is further improved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The concrete surface demolding agent is characterized by comprising the following raw materials in percentage by mass:
70 to 80 percent of refined mineral oil,
3 to 5 percent of sodium cocoate,
3 to 5 percent of petroleum sodium sulfonate,
7 to 8 percent of span,
3 to 4 percent of tween,
4 to 6 percent of coconut oil fatty acid diethanolamide,
3-4% of deionized water;
wherein the refined mineral oil is 26# white oil, has flash point of 164-223 deg.C, and kinematic viscosity of 5.7-46mm at 40 deg.C 2 /s；
The preparation method of the concrete surface demolding agent comprises the following steps:
adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 35-45 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
and (3) dropwise adding deionized water into the stirring tank, stirring the solution in the stirring tank until the solution is uniform, and continuing stirring for 25-35 minutes to obtain the concrete surface demolding agent.
2. The concrete surface mold release agent according to claim 1, characterized by comprising the following raw materials in percentage by mass:
73.5 percent of refined mineral oil,
3.5 percent of sodium cocoate,
4 percent of petroleum sodium sulfonate,
the content of the span is 8 percent,
3 percent of tween,
5 percent of coconut oil fatty acid diethanolamide,
3% of deionized water.
3. The concrete surface release agent according to claim 1, wherein the span is span 80.
4. The concrete surface release agent according to claim 1, wherein the tween is tween 80.
5. A method for preparing a concrete surface release agent, which is used for preparing the concrete surface release agent as claimed in any one of claims 1 to 4, comprising the steps of:
adding sodium cocoate and refined mineral oil into a stirring tank at a constant temperature of 35-45 ℃, starting stirring, and stirring the solution in the stirring tank until the solution is uniform;
adding sodium petroleum sulfonate into a stirring tank, and stirring the solution in the stirring tank until the solution is uniform;
adding span into the stirring box, and stirring the solution in the stirring box until the solution is uniform;
adding tween and coconut oil fatty acid diethanolamide into a stirring tank in sequence;
and (3) dropwise adding deionized water into the stirring tank, stirring the solution in the stirring tank to be uniform, and continuing stirring for 25-35 minutes to obtain the concrete surface demolding agent.
6. The method of claim 5, wherein the constant temperature is 40 ℃.
7. The method for preparing a concrete surface mold release agent according to claim 5, wherein the sodium cocoate is prepared by the following steps: obtained after saponification of coconut oil acid and sodium hydroxide at a temperature of 60-80 ℃, wherein the mole ratio of coconut oil acid to sodium hydroxide is 1.
8. A method of using a concrete surface release agent, characterized by diluting a concrete surface release agent according to any one of claims 1 to 4 to obtain a dilution;
and filling the diluent into a sprayer, and spraying the diluent on the surface of the mold through the sprayer.
9. The method for applying the concrete surface mold release agent according to claim 8, wherein the mass ratio of the concrete surface mold release agent to water in the process of obtaining the diluent is 1:5.
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