KR101665486B1 - Overlay pavement and reinforcing method for bridge deck by synthetic latex modified concrete based acrylate for concrete confusion - Google Patents
Overlay pavement and reinforcing method for bridge deck by synthetic latex modified concrete based acrylate for concrete confusion Download PDFInfo
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- KR101665486B1 KR101665486B1 KR1020160028129A KR20160028129A KR101665486B1 KR 101665486 B1 KR101665486 B1 KR 101665486B1 KR 1020160028129 A KR1020160028129 A KR 1020160028129A KR 20160028129 A KR20160028129 A KR 20160028129A KR 101665486 B1 KR101665486 B1 KR 101665486B1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/243—Phosphorus-containing polymers
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- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
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Abstract
More particularly, the present invention relates to an acrylic copolymer latex modified concrete for concrete admixing, and more particularly, to an acrylic copolymer latex modified concrete for a concrete admixture, which comprises an emulsifier and a reaction initiator composition (A), phenylethene, ethyl propenoate Butyl prop-2-enoate, 2-propenenitrile and dimehtylamonoethylmethacrylate or pro-2-enoic acid, (B), and a reaction termination composition (C), which comprises a polymer latex modified with a polymer latex modified with a mortar and a concrete, . The present invention relates to a process for producing a cement mortar and a concrete synthetic latex by emulsion polymerization of multiple monomers and a method of mixing the synthetic compound as a polymer compound in an admixture concrete so that the synthetic latex forms a film or a network in the concrete, It is possible to obtain the effect of improving the strength and durability and extending the life of the package and the package.
Description
More particularly, the present invention relates to a method of paving and repairing a concrete using acrylic-based synthetic latex modified concrete for concrete admixing, and more particularly, Polypropylene glycol, 2-propenenitrile, pro-2-enoic acid, and dimethylammonoethylmethyl acrylate based on acrylic copolymer latex.
Conventionally, concrete has been used in the manufacture of various structures. Generally, concrete usually refers to concrete manufactured using ordinary Portland cement. In general, concrete has excellent workability, high strength and economical advantage due to mass production, but it has high permeability, so that it is corroded by penetration of chloride or water, and especially reinforcing steel corrosion is promoted in reinforcing concrete And the durability is remarkably reduced. Such problems cause inconveniences of users in road or bridge packaging and cause economic loss.
Generally, road pavement can be divided into asphalt pavement and concrete pavement. The asphalt pavement has a merit of providing a pleasant road environment to the users and easy maintenance, while it has a disadvantage that the life of the road is short as a soft pavement. On the other hand, the concrete pavement classified as rigid pavement has a disadvantage in that it deteriorates the concrete and deteriorates the concrete due to chloride or moisture penetration when the pavement is broken and cracks occur, and maintenance is difficult.
Generally, concrete pavement is poured through a non-beam process according to the mixing design (cement, coarse aggregate, sand, water). It shows the strength of the material and shows the adhesive strength. Water resistance, durability, and the like.
In order to effectively prevent seawater and water penetration which have a direct effect on the durability of concrete, it is suggested to use Latex Modified Concrete (LMC) Method.
The latex added to prepare the modified concrete is usually a latex of styrene-butadiene copolymer. As a method for preparing the modified latex, a method in which the monomers and emulsifiers required for the reaction are charged in a batch, Or the like, and then the polymerization is carried out.
On the other hand, in general, bridges are collectively referred to as high-priced structures that are constructed so as to pass over upper parts of rivers, coasts, roads, and the like. Thereby forming a packaging layer.
The above-mentioned pavement pavement is typically asphalt or asbestos pavement, and is a part directly conveying the traffic load. In addition to having strength and crack resistance suitable for repeated traffic loads, it is exposed to moisture such as rainwater It is required to have a waterproof property, and in particular, it is required to have low chlorine ion permeability in order to prevent corrosion of reinforcing bars by penetration of chloride ions.
Since asphalt (asphalt) packings usually have a life span of about 4 years, they are subject to maintenance and transportation problems when they are repacked every four years. In addition, since the ascon pavement should serve as a roof for protecting bridges, it is necessary to provide a premise that the life of the mold should be improved by preventing leakage. The Ascon pavement method, which is currently being applied in Korea, requires waterproofing construction between the packing material and the bottom concrete surface, which increases the labor costs. In the case of repetitive cyclic loading, plastic deformation, debonding, spalling, and shoving occur in the asphalt pavement. The asphalt, which is a packaging material, is separated from the concrete, which is a heterogeneous material, and the rainwater, air and chloride ions penetrate through the cracks It causes deterioration of the concrete top plate and corrosion of the reinforcing steel, resulting in radical aging of the bridge top plate, which in turn has significantly reduced the durability of the bridge.
Asphalt pavement method is a method of forming a pavement layer by installing asphalt concrete (ASCON) mixed with asphalt and concrete on a pavement. This method has good workability, low initial investment cost and excellent flatness, However, since it is required to repackage periodically in order to prevent the required driving ability from being secured due to plastic deformation and surface deterioration, there is a problem in that it can cause traffic troubles along with excessive maintenance cost. Especially, There is a problem that separation and separation of the packing layer may occur due to the combination of different heterogeneous materials.
Latex modified concrete (LMC) pavement pavement method, in which synthetic rubber latex resin (SBR) is added to ordinary concrete, has been developed and utilized in order to improve the quality of the conventional techniques.
Such techniques include Korean Patent No. 313599, " Reformed Concrete for Impermeable Bridge Surface Packing ", Patent No. 421255, " Concrete or mortar containing synthetic rubber latex, and waterproof packing method using them.
The above technique has the advantage of improving the physical properties of concrete by acting as a filler to fill the micro voids in the concrete by dispersing the solid latex of the fine particles uniformly in the concrete when the concrete is formulated. That is, by filling the latex polymer film between the cement hydrate and the concrete pores, the adhesive property, the flexural-tensile strength, the freeze-thaw resistance, the permeability, and the waterproof property are improved.
However, such a technology also has excellent physical properties of materials, but the use of a large amount of expensive synthetic rubber latex has a problem that the initial cost is too much. Also, due to the nature of latex sensitive to temperature and climatic conditions, initial plastic shrinkage cracking problems occur frequently due to the variation of film formation time on the surface when the combination of latex and concrete is inadequate at the time of construction under domestic conditions where climate conditions are severely changed. .
Especially, the precision of construction is required compared with other construction methods, so it is necessary to construct skilled workers and organizations, and there is also a problem that strict quality control is required. In addition, bright colors of latex modified concrete (LMC) may cause visual burden to the driver, which may reduce the driving ability.
In recent years, a pavement pavement method using high performance concrete (HPC) has been developed which satisfactorily satisfies all the quality performance required in the pavement pavement while improving the economical efficiency of the above technology, the initial plastic shrinkage cracking problem, And has been registered as Korean Patent No. 515116.
The above technique is characterized by using a silica product and a hydrophilic micropolyvinyl alcohol (PVA) fiber as an admixture material. As a cross-pavement packaging method, a material cost is inexpensive, and it is economical. In a field batch plant and a remicon, It has an advantage of being excellent in workability because it can be produced. This technology ensures high strength and salt resistance through the use of high content of cement and silica fume with high pozzolanic reactivity and low water-cement ratio. It can also reduce cracks due to the use of PVA fiber and can also be used with other slag powder or fly ash There is also an advantage.
However, many problems in the composition of these materials are emerging through foreign literature. For example, the US Department of Transportation (DOT) conducted a survey on bridge pavement and found that cracks were found to be toxic in US bridges using high performance concrete containing silica fume since the 1980s.
In the United States, pavement pavement methods using silica fume have been carried out since the 1990s. In the case of using silica fume, which is ultra fine particles of 200,000 m 2 / g, Blaine has poor finish due to high viscosity of concrete, There are problems such as deterioration of adhesion to the plate, decrease of air volume and slump, and it is reported that cracks due to drying shrinkage frequently occur due to an increase in the amount of self-shrinkage due to plastic shrinkage cracking and high stiffness.
Also, in terms of actual usability, when silica fume is used, the workability loss of concrete is larger than that of general concrete, so that the use of high-performance water reducing agent is increased and the work loss is large. From the viewpoint of ready-mixed concrete production, it is difficult to handle due to the electrostatic coagulation phenomenon due to the material properties such as low specific gravity and high-solids content, large weighing error, difficulty in homogeneous mixing in the batcher plant, There is a problem that a storage silo is required. In terms of price, it is about 13 ~ 15 times more expensive than general materials, and it is difficult to supply and manage timely supply of raw materials because they have to rely on imports of all materials.
Generally, the synthetic latex of styrene and butadiene, which is applied to concrete roads and bridge pavements, has a limited polymerization ratio of the two monomers, and when applied to the synthetic latex modified concrete finally, it fails to meet the required waterproofness and durability standards, It has problems in economical efficiency and durability quality because it needs to apply a large amount of mixture in production.
Thus, the present inventors have found that (phenylethene) - (ethyl-propenoate) - (butyl-pro-2-enoate) - (Prop-2-enoic acid) - (dimethylammonoethylmethylacrylate) were copolymerized, and the synthetic latex was prepared under the conditions that the amount of concrete mixed was reduced The present inventors have completed the present invention by confirming that they can be used in a pavement packing and repairing method with a better function than a conventional synthetic latex.
It is an object of the present invention to improve watertightness and durability in cement concrete pavement and to provide a multi-monomer copolymer acrylic-based composite which is improved in cement admixtureability compared to conventional styrene-butadiene synthetic latex, And to provide a pavement packing and repairing method using high performance concrete manufactured using latex.
In order to accomplish the above object, the present invention provides a process for preparing a reaction initiator composition (A) comprising: 1) an emulsifier including sodium tetrapyrophosphate, sodium monododecyl sulphate and sodium hydroxide, ,
2) phenyl ethers such as phenylethene, ethyl propenoate, butyl pro-2-enoate, 2-propenenitrile, Primary and secondary monomer compositions (B) comprising monoethyl methylacrylate (dimehtylamonoethylmethacrylate) or pro-2-enonic acid, and
3) a reaction termination composition (C) comprising tertiary-butyl hydroperoxide and sodium hydroxymethane sulfinate; and a multi-polymer synthetic latex for mortar and concrete It provides pavement pavement and repair method by modified mixed concrete.
Hereinafter, the present invention will be described in detail.
In the present invention, the emulsion agent and the reaction initiator composition (A) may be mixed with 0.1 to 0.5 parts by weight of sodium tetrapyrophosphate, 0.5 part by weight of sodium monododecane, 0.2 to 0.4 part by weight of silicate sulfate and 0.1 to 0.5 part by weight of sodium hydroxide, wherein the total monomer composition (B) of the primary and secondary monomer composition comprises 20 to 40 parts by weight of phenylethene, ethyl-propenoate 10 to 40 parts by weight of butyl-prop-2-enoate, 1-10 parts by weight of 2-propenenitrile and 5 to 20 parts by weight of dimethylammonoethylmethyl acrylate, or prop-2-eno (I) is 1-10 parts by weight, and the reaction terminating composition (C) preferably contains 0.1-0.5 parts by weight of tertiary-butyl hydroperoxide and 0.1-0.8 parts by weight of sodium hydroxymethanesulfinate.
In addition, in the present invention, in the pavement packing and repairing method using the mixed concrete modified by the multi-polymer synthetic latex for mortar and concrete, the above-mentioned pavement packing and repairing method is characterized in that 1) the lathness, paste and foreign matter Removing by shot blasting and lining operations, cleaning and removing stakes and fine particles generated by the shot blasting and lining using high-pressure water; 2) after the surface-treated and cleaned slab surface is dried to a surface dry saturated state, it is covered with a colored or translucent polyethylene film to prevent evaporation of water by atmospheric temperature and ultraviolet rays; 3) laying the multi-polymer synthetic latex and mixed concrete using a deck finishing, screed or equivalent planarization equipment; And 4) progressing longitudinal or transverse tinning work for non-slip during the above-mentioned concrete installation process, and spraying the oily film curing agent immediately after the tinning operation to cause the surface roughness and plastic crack of the poured concrete And a step of preventing the disease.
The present invention relates to a cross-pavement repair and maintenance method using mixed concrete modified by a multi-polymer synthetic latex for mortar and concrete, wherein the synthetic latex comprises (phenylethene) - (ethyl-propenoate) - (butyl- (Prop-2-enoic acid) - (2-propenenitrile) - (pro-2-enoic acid) - (dimethylammonoethylmethylacrylate) Is divided into four steps before polymerization and prepared in the form of each composition in advance. Specifically, the components for polymerization are divided into the form of a pre-polymerization emulsifier composition (A), a monomer composition for a first stage polymerization (B-1), a second stage monomer composition (B-2) and a reaction termination composition (C) After quantification, the polymer is subjected to a polymerization process in which it is added sequentially to the reactor.
At this time, the charged amount of the monomer composition for primary polymerization (B-1) is 80 to 90% of the total monomer weight is charged at the beginning of polymerization to proceed the polymerization reaction, and the amount of the secondary monomer composition (B-2) And introduced into the late stage of the reaction so as to provide a cationic functional group on the surface side of the particles of the copolymer latex.
The synthetic latex used in the cross-linking and repairing method of the present invention having the above structure is composed of (phenylethene) - (ethyl-propenoate) - (butyl-pro-2-enoate) - (Dimethylaminoethyl methacrylate) - (dimethylammonoethylmethylacrylate), the monomer composition is divided into two kinds of compositions in advance and introduced into the reactor so that the polymerization reaction of the polymer main chain is uniform And is effective in maximizing the quality uniformity by minimizing the change in the quality of the polymerized polymer. In the polymerization reaction, the polymer main chain and the anionic functional group are induced by the first polymerization reaction to remove the heavy metal cationic particles of the cement surface particles Neutralization and cement admixture can be maximized and polymer main chain and cationic functional group can be given by the secondary polymerization reaction. Therefore, when concrete is mixed, fine aggregate and coarse aggregate surface It is possible to obtain a more compact concrete structure and an inner pore filling effect by bonding with anionic functional groups and it is possible to reduce the influence on the number of formulations and the pot life due to the quality deviation of aggregate generated from fine aggregates of fine aggregate and coarse aggregate This is effective not only in producing uniform quality concrete but also in cost reduction since it can reduce the required amount of use in conventional styrene and butadiene synthetic latex modified concrete.
The present invention relates to a process for the preparation of a new concrete concrete bridge pavement and road and bridges for the purpose of repairing (polyphenylene) - (ethyl-propenoate) - (butyl-pro-2-enoate) - (2-propenenitrile) (Pro-2-enoic acid) - (dimethylammonoethylmethylacrylate) In order to polymerize and prepare the latex, the above-described six kinds of monomers were used as the main chain, and the respective constituents for the latex polymerization Is prepared in the form of a pretreatment quantitative metering composition of four stages before polymerization, and emulsion polymerization is carried out in the form of a monomer composition.
More specifically, before the polymerization reaction, an emulsifier and a reaction initiator composition (A) comprising 0.1-0.5 parts by weight of sodium tetrapyrophosphate, 0.2-0.4 parts by weight of sodium monododecyl sulfate and 0.1-0.5 parts by weight of sodium hydroxide,
24-36 parts by weight of phenylethene, 24-36 parts by weight of ethyl-propenoate, 1-18 parts by weight of butyl-prop-2-enoate, 1-10 parts by weight of 2- (B-1) was added to the reactor, the temperature of the reactor was raised to 80 DEG C, and the primary polymerization reaction was carried out for 5 hours. After 5 hours of the reaction, the monomer composition 4-16 parts by weight of tin, 4-16 parts by weight of ethyl-propenoate, 2-19 parts by weight of butyl-pro-2-enoate and 1-10 parts by weight of dimethylammonoethylmethyl acrylate (B-2) (C) is added over 2 hours to proceed the polymerization reaction, and 0.1 to 0.5 parts by weight of tertiary-butyl hydroperoxide and 0.1 to 0.8 part by weight of sodium hydroxymethanesulfinate (C) was added and the reaction was terminated for 1 hour. The content of residual phenylethene and ethyl-propenoate was adjusted to 400 ppm And, after the reaction the temperature of the synthetic latex if not more than 40 ℃ be transferred to the storage tank.
The particle size of the synthetic latex polymerized in the present invention is controlled by the molar ratio of pro-2-enoic acid to dimethylammonoethylmethyl acrylate. As the molar ratio of dimethylammonoethylmethyl acrylate increases, the particle size decreases do. On the contrary, when the molar ratio of the two monomers is decreased, the particle size of the synthetic latex is increased. The synthetic latex of the present invention has a particle size of 100-180 nanometers. To obtain a particle size within this range, the molar ratio of pro-2-enoic acid to dimethylammonoethylmethyl acrylate is 1: 1 -2) level is preferred. If it exceeds this range, the particle size becomes smaller, and thus the dispersibility of the produced concrete is lowered and the viscosity is increased, which is a factor of lowering the working efficiency.
In addition, as the molar ratio of pro-2-enoic acid to dimethylammonoethylmethyl acrylate increases, the low shear viscosity of the synthetic latex is greatly increased, which deteriorates the dispersion and stability of the synthetic latex. The molar ratio of monoethylmethyl acrylate is preferably 1: (1-2).
In addition, the pH of the synthetic latex at a molar ratio of pro-2-enoic acid to dimethylammonoethylmethyl acrylate of 1: (1-2) is about 8.5-10.5, which is suitable for cement admixture, , The viscosity of the synthetic latex rapidly increases and the dispersion stability is lowered.
The phenylethene can increase and control the compressive strength of the latex-modified concrete in order to impart and control the stiffness of the polymerized synthetic latex film. The amount of the phenylethene used is determined by considering the polymerization rate of the main chain of the polymer with ethyl-propenoate, 30 to 40% by weight is preferable. When the amount is less than 30% by weight, the rigidity is deteriorated. When the amount is more than 40% by weight, the rigidity of the concrete is increased, so that the ductility of the concrete pavement is decreased and the flexural strength is decreased.
The ethyl-propenoate is used for enhancing and controlling the flexural strength of the latex-modified concrete for imparting and controlling flexibility of the polymerized synthetic latex film. The amount of the ethyl-propenoate used is 30-40 wt%, considering the polymerization rate of the polymer main chain with phenylethene. . If the amount is less than 30% by weight, the ductility of the concrete is insufficient. If the amount is more than 40% by weight, ductility is exceeded and the compressive strength is lowered.
The butyl-pro-2-enoate reinforces the ductility of the polymerized synthetic latex film and is effective in increasing the adhesion strength of the latex modified concrete. The butyl-pro-2-enoate is effective in improving the adhesion of the latex- Thereby improving the adhesion strength. Therefore, the copolymerization ratio of phenylethene and ethyl-propenoate is preferably 1-20% by weight, and if the amount is 20% by weight or more, the ductility of the polymerized synthetic latex film is increased to lower the rigidity of the concrete.
The 2-propenenitrile reinforces the rigidity of the polymerized synthetic latex film and increases the cross-linking of the main chain and the tensile strength of the film. Therefore, it maintains the tensile strength between the latex-cement and the latex-aggregate due to the traffic volume vibration of the latex mixed concrete and improves the cross-sectional fracture resistance. The amount thereof is preferably 1-10% by weight, and when it is 10% by weight or more, it is important to increase the rigidity of the synthetic latex film so that the amount thereof is adjusted to 10% by weight or less.
The pro-2-enoic acid imparts anionic functional groups to the first polymerized polymer of the polymerized latex, thereby neutralizing the surface of the cement particles having a large amount of cationic surface functional groups, thereby improving dispersion and cement admixture. It also serves as a dispersing agent which alleviates the cement and concrete entanglement phenomena caused by fine aggregates and fine aggregates on the surface of fine aggregates and coarse aggregates. The amount of the synthetic latex is preferably about 1-10% by weight, and if it is 10% by weight or more, the effect on the particle size, viscosity, and pH of the synthetic latex becomes large.
The dimethylammonoethylmethylacrylate is effective for imparting an inert amino group on the surface of the polymerized latex and enhancing the adhesion strength of the concrete. When the synthetic latex is exposed to the cement together with the compounding water during the compounding of the concrete, the cement becomes strong alginate. At this time, the pH is usually at least 10, and the amino group is activated at this interface, The adhesion strength of the latex particles on the aggregate surface and the bond strength between the old and new concrete are improved, which is conventionally very useful for increasing the long-term bond strength. The amount thereof is preferably from 1 to 10% by weight, and when the amount is more than this amount, the rigidity of the polymer latex film is lowered and a side effect of increasing the viscosity can be caused.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, it should be understood that the following embodiments are provided so that those skilled in the art may understand the present invention without departing from the scope and spirit of the present invention. It is not.
≪ Example 1 >
0.25 part by weight of sodium tetrapyrophosphate, 0.3 part by weight of sodium monododecyl sulfate and 0.3 part by weight of sodium hydroxide, and a reaction initiator composition, 32.5 parts by weight of phenylethene, 30 parts by weight of ethyl-propenoate, 2-enoate, 5 parts by weight of 2-propenenitrile and 5.0 parts by weight of pro-2-enoic acid, and 7.5 parts by weight of dimethylammonoethylmethyl acrylate. Each of the polymerization reaction And the polymerization was carried out at 80 ° C. for 5 hours and 2 hours at 80 ° C., 0.3 part by weight of tertiary-butyl hydroperoxide and 0.5 part by weight of sodium hydroxymethanesulfinate, To prepare a multi-polymer synthetic latex.
≪ Example 2 >
0.25 part by weight of sodium tetrapyrophosphate, 0.3 part by weight of sodium monododecyl sulfate and 0.3 part by weight of sodium hydroxide, and 30.0 parts by weight of phenylenetriene, 30 parts by weight of ethyl-propenoate, 2-enoate, 5 parts by weight of 2-propenenitrile, 5.0 parts by weight of pro-2-enoic acid and 10.0 parts by weight of dimethylammonoethylmethyl acrylate, And the polymerization was carried out at 80 ° C. for 5 hours and 2 hours at 80 ° C., 0.3 part by weight of tertiary-butyl hydroperoxide and 0.5 part by weight of sodium hydroxymethanesulfinate, To prepare a multi-polymer synthetic latex.
≪ Example 3 >
0.25 part by weight of sodium tetrapyrophosphate, 0.3 part by weight of sodium monododecyl sulfate and 0.3 part by weight of sodium hydroxide, and a reaction initiator composition, 27.5 parts by weight of phenylethene, 30 parts by weight of ethyl-propenoate, 2-enoate, 5 parts by weight of 2-propenenitrile and 5.0 parts by weight of pro-2-enoic acid, and 12.5 parts by weight of dimethylammonoethylmethyl acrylate. And the polymerization was carried out at 80 ° C. for 5 hours and 2 hours at 80 ° C., 0.3 part by weight of tertiary-butyl hydroperoxide and 0.5 part by weight of sodium hydroxymethanesulfinate, To prepare a multi-polymer synthetic latex.
<Example 4>
An emulsifier composed of 0.25 part by weight of sodium tetrapyrophosphate, 0.3 part by weight of sodium monododecyl sulfate and 0.3 part by weight of sodium hydroxide, 25 parts by weight of phenylenetene, 30 parts by weight of ethyl-propenoate, 2-enoate, 5 parts by weight of 2-propenenitrile, 5.0 parts by weight of pro-2-enoic acid, and 15 parts by weight of dimethylammonoethylmethyl acrylate. And the polymerization was carried out at 80 ° C. for 5 hours and 2 hours at 80 ° C., 0.3 part by weight of tertiary-butyl hydroperoxide and 0.5 part by weight of sodium hydroxymethanesulfinate, To prepare a multi-polymer synthetic latex.
<Comparative Example>
As a control group, a styrene-butadiene copolymer latex described in Korean Patent Publication No. 4441055 was used.
The main physical properties of the synthetic latex of Example 1-4 are shown in Table 1 below.
Note: 1) KS M 6516-2006
2) KS M 6516-2006
3) KSA ISO 13320-1
4) KS M 6030-2004
According to the results shown in Table 1, the particle size of the synthetic latex was controlled according to the molar ratio of pro-2-enoic acid to dimethylammonoethylmethyl acrylate in Example 1-4 obtained by the production method of the present invention And the molar ratio of the latex did not affect the solid concentration of the synthetic latex but the pH of the synthetic latex was slightly increased as the molar ratio increased. In addition, Example 1-4 showed the physical properties of a synthetic latex similar to the control group of the comparative example.
The latex mixed concrete using the latex samples of the control groups of Examples 1-4 and Comparative Examples in Table 1 was prepared and the mixing conditions are shown in Table 2 below.
(W)
(C)
(S)
(L)
Note: 1) Use Portland cement of the first kind, usually Portland cement
2) The quality standard of fine aggregate is the stability test KS F2507, aggregate washing test loss rate (No.200 sieve amount) KS F2511, clay lump content KS F2512, floating on liquid of specific gravity 2.0 KS F2513, absorption rate KS F2504, ) KS F2504, the granularity KS F2727, the particle shape judging granularity KS F2527, the specific gravity of 2.63, and the granularity of 2.68,
3) The coarse aggregate quality standard is KS F2511, KS F2503, KS F2503, KS F2503, KS F2507, KS F2507, and KS F2508, respectively. A sieving ratio of 6.68 was used,
4) The synthetic latexes of Examples 1-4 and the control group were used.
The results of the measurement of the compressive strength and flexural strength of the prepared latex-mixed concrete based on the 28-day old age based on the concrete mixing conditions are shown in Table 3 below.
Note: 1) KS F 2402
2) KS F 2449
3) KS F 2405 (standard: more than 27 MPa)
4) KS F 2407 (standard: more than 4.5 MPa)
According to the results shown in Table 3, Examples 1-4 exhibited similar slump and air content as conventional styrene-butadiene synthetic latex modified concrete, and showed similar or excellent results in concrete strength.
Particularly, Examples 1 and 2 show the particle size of the synthetic latex contemplated in the present invention, and compared with the conventional styrene-butadiene modified concrete, the synthetic latex- Compressive strength and flexural strength.
These results are similar to those of the control group, because the self - polymer film strength of composite latex using multiple monomers, miscibility with cement, required amount of compounding, etc.
The following Table 4 shows the results of comparison between the latex modified concrete composition prepared according to Examples 1 to 4 and the comparative example (control group) for chloride ion of concrete by electric conductivity specified in KS F 2711 [Test Method for Chloride Ion Penetration Resistance] Penetration test results are shown.
As shown in Table 4, Example 4 exhibited the best chlorine ion penetration resistance. This result shows that the particle size of the synthetic latex is the smallest and the exponential increase of the specific surface area of the individual particles, The filling area and the effect of surface coating of cement, fine aggregate and coarse aggregate are the most important results. In addition, the comparison of Example 1 and Comparative Example shows that the synthetic latex film itself, which has a similar particle size, but has the water resistance and waterproofing effect of the synthetic latex film itself, is superior to that of the comparative example, It was confirmed that the resistance was improved.
Table 5 shows the results of measurement of the latex modified concrete composition prepared according to Examples 1 to 4 and the concrete composition prepared according to the comparative example, according to KS F 2456 (Test Method for Freezing and Thawing Resistance).
As shown in Table 5, it can be seen that the durability index of the latex modified concrete composition prepared according to Examples 1 to 4 is improved compared with the concrete composition prepared according to the Comparative Example.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, This is possible.
The design name reflects the name of the LMC, adopts the existing method, constructs it, and uses [acrylic polymer system] or [multi-polymer system] in the standard column in order to secure additional technology advantage.
Claims (3)
1) an emulsifier containing sodium tetrapyrophosphate, sodium monododecyl sulphate and sodium hydroxide and a reaction initiator composition (A),
2) phenyl ethers such as phenylethene, ethyl propenoate, butyl pro-2-enoate, 2-propenenitrile, Primary and secondary monomer compositions (B) comprising monoethyl methylacrylate (dimehtylamonoethylmethacrylate) or pro-2-enonic acid, and
3) a reaction termination composition (C) comprising tertiary-butyl hydroperoxide and sodium hydroxymethane sulfinate; and a multi-polymer synthetic latex for mortar and concrete Characterized in that the modified mixed concrete is used.
The total monomer composition (B) of the primary and secondary monomer compositions comprises 20-40 parts by weight of phenylethene, 20-40 parts by weight of ethyl-propenoate, 10-40 parts by weight of butyl-pro-2-enoate, 1-10 parts by weight of 2-propenenitrile, 5-20 parts by weight of dimethylammonoethylmethyl acrylate or 1-10 parts by weight of pro-2-enoic acid,
The reaction termination composition (C) uses a mixed concrete modified by a multi-polymer synthetic latex for mortar and concrete comprising 0.1 to 0.5 parts by weight of tertiary-butyl hydroperoxide and 0.1 to 0.8 part by weight of sodium hydroxymethanesulfinate Wherein the pavement pavement method comprises:
1) After removing the latency, paste and foreign matter on the surface of the new bridge slab by shot blasting and lining operation, the shot blast and lining work are cleaned and removed by using the high pressure water step;
2) after the surface-treated and cleaned slab surface is dried to a surface dry saturated state, it is covered with a colored or translucent polyethylene film to prevent evaporation of water by atmospheric temperature and ultraviolet rays;
3) laying the mixed concrete modified by the multi-polymer synthetic latex of claim 1 or 2 with a deck finisher, a screed or equivalent planarization equipment; And
4) In the step of installing the mixed concrete, the longitudinal and transverse direction tinning work for non-slip is carried out, and immediately after the tinning operation, the surface crack and plastic crack of the concrete surface laid by spraying the oily film curing agent, Wherein the mixed concrete modified by the multi-polymer synthetic latex for mortar and concrete is used.
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| KR102288284B1 (en) | 2021-02-03 | 2021-08-12 | 주식회사 씨큐알 | Polymer concrete mortar composition for bridge deck thin facing pavement comprising methylmethacrylate resin and rapid cooled steel slag fine aggregate and the construction method bridge deck thin facing pavement thereof |
| KR102288279B1 (en) | 2021-02-03 | 2021-08-12 | 주식회사 씨큐알 | Polymer concrete mortar composition for bridge deck thin facing pavement comprising methylmethacrylate resin and garnet fine aggregate and the construction method bridge deck thin facing pavement thereof |
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