CN110835507B - Construction process of prefabricated plastic track - Google Patents
Construction process of prefabricated plastic track Download PDFInfo
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- CN110835507B CN110835507B CN201911122697.9A CN201911122697A CN110835507B CN 110835507 B CN110835507 B CN 110835507B CN 201911122697 A CN201911122697 A CN 201911122697A CN 110835507 B CN110835507 B CN 110835507B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/24—Homopolymers or copolymers of amides or imides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/6696—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/36 or hydroxylated esters of higher fatty acids of C08G18/38
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
- E01C13/04—Pavings made of prefabricated single units
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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
- E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
- E01C13/04—Pavings made of prefabricated single units
- E01C13/045—Pavings made of prefabricated single units the prefabricated single units consisting of or including bitumen, rubber or plastics
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention discloses a construction process of a prefabricated plastic track, which comprises the following steps: performing basic reinspection, coating an adhesive, paving a coiled material, and curing and molding; the adhesive layer is formed by coating an adhesive formed by mixing a component A, a component B and a component C, wherein the component A of the adhesive comprises the following raw materials: polyoxypropylene triol, castor oil, filler, nano silicon dioxide and catalyst; the component C of the adhesive comprises the following raw materials: n-amyl acrylate, methyl methacrylate, isooctyl acrylate, N-methylol acrylamide, hydroxyethyl acrylate, acrylic acid, an emulsifier, a sodium persulfate initiator, and deionized water. The adhesive prepared by mixing the component A, the component B and the component C has the characteristics of long early-stage operation time and short later-stage curing time, can be used for construction of simple areas and complex areas of runways at the same time, and has the advantage of simplifying construction process.
Description
Technical Field
The invention relates to the technical field of athletic field runway construction, in particular to a construction process of a prefabricated plastic runway.
Background
The plastic track is also called as all-weather track and field sports track, and is composed of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM rubber particles or PU particles, pigment, auxiliary agent and filler; can be divided into a breathable plastic track, a mixed plastic track, a composite plastic track and an all-plastic track. In the prior art, a chinese patent with an authorization publication number of CN1186500C discloses a plastic track construction method, wherein the applied paving material comprises base glue, surface glue and anti-skid rubber particles, each layer of material in the construction method is paved on the whole track in a whole area, and the method comprises the steps of batching, checking, cleaning foundation, paving base glue, paving surface glue, spraying anti-skid rubber particles, recycling residual rubber particles, marking off track lines and the like, and a layer of primer or pure PU cement coating process can be added according to the ground foundation before paving base glue and surface glue.
However, the construction process is complicated, and after the rubber particles are sprayed, the redundant rubber particles on the construction site need to be cleaned or recycled, so that the labor capacity is increased; in addition, in the using process of the plastic track, due to environmental and human factors, the rubber particles on the local part of the plastic track are seriously abraded or fall off; to solve this problem, some prefabricated plastic runways have appeared. The construction process of the prefabricated plastic runway generally comprises the steps of laying an asphalt base layer on the runway, then laying a PU (polyurethane) coiled material coated with an adhesive on the runway as a surface layer, wherein the PU coiled material is usually formed by compounding a PU material and a material containing an organic silicon component, and the PU coiled material does not contain rubber particles and cannot generate a threshing phenomenon, so that the prefabricated plastic runway is very suitable for frequent use.
Because the PU coiled material is integrated into one piece, its thickness is 13mm generally, and the width is 1.22m for its construction is simpler, needs the gluing agent can solidify rapidly this moment, and the region that the width is less than 1.22m such as small area and corner then need cut the PU coiled material according to ground size and maintain, because the progress of laying slows down, then need prolong the time of gluing agent this moment, so that adjust the position of PU coiled material. Therefore, the traditional construction process still has certain defects.
Disclosure of Invention
The invention aims to provide a construction process of a prefabricated plastic track, which has the characteristics of long early operation time and short later curing time by using an adhesive prepared by mixing a component A, a component B and a component C, can be simultaneously used for construction of simple areas and complex areas of the track, and has the advantage of simplifying the construction process.
The technical purpose of the invention is realized by the following technical scheme:
a construction process of a prefabricated plastic track comprises the following steps:
s1, basic review: cleaning an asphalt base layer of a runway, and detecting the flatness of the asphalt base layer;
s2, adhesive coating: uniformly stirring the component A, the component B and the component C of the adhesive, and coating the mixture on an asphalt base layer to form a bonding layer;
s3, laying of coiled materials: the PU coiled materials are laid on the bonding layer, and the butt joint positions of the adjacent PU coiled materials are cut orderly; cutting small areas, corners and areas with the width less than 1.22m according to the actual ground size and then laying;
s4, curing and forming: after the coiled material is laid, uniformly pressing a heavy object on the surface layer of the coiled material;
the component A of the adhesive comprises the following raw materials in parts by weight: 15-25 parts of polyoxypropylene triol, 10-15 parts of castor oil, 5-7 parts of filler, 3-5 parts of nano silicon dioxide and 0.03-0.05 part of catalyst;
the component B of the adhesive is formed by mixing diphenylmethane diisocyanate and polymethylene polyphenyl isocyanate in a weight ratio of (1-1.5) to 1;
the component C of the adhesive comprises the following raw materials in parts by weight: 30-40 parts of N-amyl acrylate, 5-10 parts of methyl methacrylate, 3-5 parts of isooctyl acrylate, 1-2 parts of N-hydroxymethyl acrylamide, 1-2 parts of hydroxyethyl acrylate, 1-2 parts of acrylic acid, 0.5-1 part of emulsifier, 0.3-0.5 part of sodium persulfate initiator and 30-40 parts of deionized water.
By adopting the technical scheme, the adhesive mixed by the component A, the component B and the component C has the characteristics of long earlier-stage operation time and short later-stage curing time, and the same adhesive can be adopted for laying of a complex area and a simple area during construction of the plastic track, so that the construction process is simplified; when laying complicated region, longer operating time has, can have the position of enough long time adjustment coiled material, in order to improve and lay the quality, lay the back in simple region and complicated region, suppress the heavy object on the coiled material surface course, the gluing agent rises gradually and fills to the bottom surface recess of PU coiled material under the effect of pressure, thereby increase the area of contact of gluing agent and PU coiled material, and under the effect of pressure, can be so that the gluing agent solidifies fast, has fine maneuverability, can be used for simple region and complicated region simultaneously, greatly reduced the construction degree of difficulty.
Further, the component A of the adhesive is prepared by the following method: taking 15-25 parts of polyoxypropylene triol, 10-15 parts of castor oil, 5-7 parts of filler and 3-5 parts of nano silicon dioxide, heating to 110-120 ℃, vacuumizing to-0.09 MPa, stirring for 20-30min, adding 0.03-0.05 part of catalyst, and stirring for 1-2h to obtain the component A.
By adopting the technical scheme, after the component A and the component B are mixed, the polyurethane adhesive formed by crosslinking has good hydrolysis resistance and stability and excellent later-stage adhesive force.
Further, the catalyst is dibutyltin dilaurate.
Further, the filler is formed by mixing titanium dioxide and kaolin powder in a weight ratio of 1: 1.
By adopting the technical scheme, the talcum powder, the calcium carbonate and the silicon micropowder are used as the filler of the adhesive, so that the curing shrinkage rate of the adhesive can be reduced, and the adhesive force and the lubricating property of the adhesive are improved.
Further, the component C of the adhesive is prepared by the following method: taking 30-40 parts of N-amyl acrylate, 5-10 parts of methyl methacrylate, 3-5 parts of isooctyl acrylate, 1-2 parts of N-hydroxymethyl acrylamide, 1-2 parts of hydroxyethyl acrylate, 1-2 parts of acrylic acid and 15-20 parts of deionized water by weight, and stirring for 30-60min to obtain an emulsion A;
heating 0.5-1 part of emulsifier and 15-20 parts of deionized water to 70-80 ℃, and stirring for 10-20min to obtain an emulsion B;
thirdly, heating the emulsion B to 85 ℃, dripping the emulsion B into the emulsion A for 1 to 2 hours, then adding 0.3 to 0.5 part of sodium persulfate initiator, keeping the temperature and stirring for 3 to 5 hours, and cooling to obtain the component C of the adhesive.
By adopting the technical scheme, the C component prepared by taking n-amyl acrylate, methyl methacrylate and isooctyl acrylate as main raw materials has excellent adhesive force under the pressure action, and can improve the early-stage adhesive force between the coiled material and the base layer.
Further, the emulsifier is 2-acrylamide-2-methyl sodium propane sulfonate.
By adopting the technical scheme, the 2-acrylamide-2-methyl sodium propane sulfonate is used as the emulsifier, so that the adhesive force and the water resistance of the adhesive can be improved, and the stability of the adhesive can be improved.
Further, S2, before the coil is laid, the moisture content of the ground is detected, and when the moisture content of the ground is less than or equal to 5%, the coil is laid.
By adopting the technical scheme, if the water content of the ground is too high, the adhesive force of the adhesive can be reduced, and the curing time of the adhesive is influenced.
Further, S2, stirring the component A and the component B of the adhesive for 3min according to the weight ratio of 3:1, then adding the component C accounting for 120% of the weight of the component A, and stirring for 2 min.
Through adopting above-mentioned technical scheme, when mixing C component and A component, B component, lay the completion back at the coiled material, under the effect of heavy object pressure, C component can provide adhesion in earlier stage to fix in advance the coiled material, prevent that it from taking place horizontal migration, under the effect of A component, B component afterwards, can improve later stage adhesion, further improve the bonding strength of coiled material and basic layer, in order to improve the life of plastic course.
Further, the dosage of the adhesive in S2 is 1.2kg/m2。
Further, the weight of S4 was a sealed sand-filled bag weighing 20 kg.
Through adopting above-mentioned technical scheme, 20 kg's sealed sand bag of irritating can exert pressure to the coiled material, is favorable to the gluing agent to rise to the recess of coiled material bottom and restrict the lateral shifting of coiled material to carry out the pre-fixing to the coiled material.
In summary, compared with the prior art, the invention has the following beneficial effects:
the adhesive prepared by the invention has the characteristics of long early-stage operation time and short later-stage curing time, and the same adhesive can be adopted for laying of a complex area and a simple area during construction of a plastic track, so that the construction process is simplified; when laying complicated region, longer operating time has, can have the position of enough long time adjustment coiled material, in order to improve and lay the quality, lay the back in simple region and complicated region, suppress the heavy object on the coiled material surface course, the gluing agent rises gradually and fills to the bottom surface recess of PU coiled material under the effect of pressure, thereby increase the area of contact of gluing agent and PU coiled material, under the effect of heavy object pressure, the C component can provide adhesion in earlier stage, in order to fix in advance the coiled material, prevent that it from taking place horizontal migration, at A component afterwards, under the effect of B component, can improve later stage adhesion, further improve the adhesion strength of coiled material and basic layer, in order to improve plastic course's life.
Detailed Description
The present invention will be described in further detail below.
Examples the polyoxypropylene triols of the following examples are selected from polyoxypropylene triols provided by golden malol chemical having a molecular weight of 600; the castor oil is selected from 3-22 types of castor oil provided by Rubenxiang; the sodium 2-acrylamido-2-methylpropanesulfonate is selected from sodium 2-acrylamido-2-methylpropanesulfonate, model 2405, available from Weifang Runwei trade company Limited.
Example 1: the adhesive comprises a component A, a component B and a component C, wherein the component A and the component B of the adhesive are stirred for 3min according to the weight ratio of 3:1, then the component C accounting for 120% of the weight of the component A is added, and the stirring is carried out for 2min to obtain the adhesive;
(1) preparation of component A: taking 15kg of polyoxypropylene triol, 10kg of castor oil, 2.5kg of titanium dioxide, 2.5kg of kaolin powder and 3kg of nano-silica, heating to 110 ℃, vacuumizing to-0.09 MPa, stirring for 20min, adding 0.03kg of dibutyltin dilaurate, and stirring for 1h to obtain a component A;
(2) preparation of the component B: uniformly mixing diphenylmethane diisocyanate and polymethylene polyphenyl isocyanate in a weight ratio of 1:1 to obtain a component B;
(3) preparation of component C: taking 30kg of N-amyl acrylate, 5kg of methyl methacrylate, 3kg of isooctyl acrylate, 1kg of N-hydroxymethyl acrylamide, 1kg of hydroxyethyl acrylate, 1kg of acrylic acid and 15kg of deionized water, and stirring for 30min to obtain an emulsion A;
heating 2-acrylamide-2-methyl sodium propanesulfonate 0.5kg and deionized water 15kg to 70 deg.c, and stirring for 10min to obtain emulsion B;
thirdly, heating the emulsion B to 85 ℃, dripping the emulsion B into the emulsion A for 1h, then adding 0.3kg of sodium persulfate initiator, keeping the temperature and stirring for 3h, and cooling to obtain a component C.
Example 2: the adhesive comprises a component A, a component B and a component C, wherein the component A and the component B of the adhesive are stirred for 3min according to the weight ratio of 3:1, then the component C accounting for 120% of the weight of the component A is added, and the stirring is carried out for 2min to obtain the adhesive;
(1) preparation of component A: taking 20kg of polyoxypropylene triol, 12.5kg of castor oil, 3kg of titanium dioxide, 3kg of kaolin powder and 45kg of nano-silica, heating to 115 ℃, vacuumizing to-0.09 MPa, stirring for 25min, adding 0.04kg of dibutyltin dilaurate, and stirring for 1.5h to obtain a component A;
(2) preparation of the component B: uniformly mixing diphenylmethane diisocyanate and polymethylene polyphenyl isocyanate in a weight ratio of 1.2:1 to obtain a component B;
(3) preparation of component C: taking 35kg of N-amyl acrylate, 7.5kg of methyl methacrylate, 4kg of isooctyl acrylate, 1.5kg of N-hydroxymethyl acrylamide, 1.5kg of hydroxyethyl acrylate, 1.5kg of acrylic acid and 17.5kg of deionized water, and stirring for 45min to obtain an emulsion A;
heating 2-acrylamide-2-methyl sodium propanesulfonate 0.75kg and deionized water 17.5kg to 75 deg.c, and stirring for 10-20min to obtain emulsion B;
thirdly, heating the emulsion B to 85 ℃, dripping the emulsion B into the emulsion A for 1.5 hours, then adding 0.4kg of sodium persulfate initiator, keeping the temperature and stirring for 4 hours, and cooling to obtain the component C.
Example 3: the adhesive comprises a component A, a component B and a component C, wherein the component A and the component B of the adhesive are stirred for 3min according to the weight ratio of 3:1, then the component C accounting for 120% of the weight of the component A is added, and the stirring is carried out for 2min to obtain the adhesive;
(1) preparation of component A: taking 25kg of polyoxypropylene triol, 15kg of castor oil, 3.5kg of titanium dioxide, 3.5kg of kaolin powder and 5kg of nano-silica, heating to 120 ℃, vacuumizing to-0.09 MPa, stirring for 30min, adding 0.05kg of dibutyltin dilaurate, and stirring for 2h to obtain a component A;
(2) preparation of the component B: uniformly mixing diphenylmethane diisocyanate and polymethylene polyphenyl isocyanate in a weight ratio of 1.5:1 to obtain a component B;
(3) preparation of component C: taking 40kg of N-amyl acrylate, 10kg of methyl methacrylate, 5kg of isooctyl acrylate, 2kg of N-hydroxymethyl acrylamide, 2kg of hydroxyethyl acrylate, 2kg of acrylic acid and 20kg of deionized water, and stirring for 60min to obtain an emulsion A;
heating 2-acrylamide-2-methyl sodium propanesulfonate 1kg and deionized water 20kg to 80 deg.c, and stirring for 20min to obtain emulsion B;
thirdly, heating the emulsion B to 85 ℃, dripping the emulsion B into the emulsion A for 2 hours, then adding 0.5kg of sodium persulfate initiator, keeping the temperature and stirring for 5 hours, and cooling to obtain a component C.
Secondly, in the following application examples, the asphalt mixture is an AC-10 common asphalt mixture provided by Ruixin (Chengdu) asphalt materials Co.Ltd; the PU coiled material adopts PU prefabricated plastic runway material provided by Shenzhen Libangtai industry Co.
Example (b): a construction process of a prefabricated plastic track comprises the following steps:
s1, setting an asphalt base layer: after cleaning the runway area, paving a 50mm asphalt mixture, and compacting and forming to obtain an asphalt base layer;
s2, basic review: cleaning an asphalt base layer of a runway, and detecting the flatness of the asphalt base layer; the flatness qualification rate is over 95 percent, and the clearance gauge error of a 3-meter straight ruler is less than or equal to 3 mm;
s3, adhesive coating: detecting the water content of the ground, and paving the coiled material when the water content of the ground is less than or equal to 5 percentStirring the component A and the component B of the adhesive according to the weight ratio of 3:1 for 3min, then adding the component C accounting for 120% of the weight of the component A, stirring for 2min to obtain the adhesive (selected from preparation example 1 of the adhesive), coating the adhesive on an asphalt base layer, wherein the using amount of the adhesive is 1.2kg/m2Forming a bonding layer;
s4, laying of coiled materials: the PU coiled materials are laid on the bonding layer, and the butt joint positions of the adjacent PU coiled materials are cut orderly; the paving sequence is that the paving materials are firstly straight and then bent, and are from far to near and from inside to outside; cutting small areas, corners and areas with the width less than 1.22m according to the actual ground size and then laying;
s5, curing and forming: after the coiled material is laid, uniformly pressing a sealing sand filling bag with the weight of 20kg on the surface layer of the coiled material for 24 hours;
s6, local trimming: trimming the uneven splicing position of the coiled materials;
s7, positioning and marking after paving: and (4) cleaning impurities on the surface layer of the plastic track, marking the surface layer according to the standard, and putting the surface layer into use 24 hours after marking.
Third, comparative example
Comparative example 1: this comparative example differs from example 1 in that the adhesive comprises only a component a and a component B.
Comparative example 2: the difference between the comparative example and the example 1 is that the component A does not contain titanium dioxide and nano-silica, and the component C does not contain N-methylolacrylamide and 2-acrylamido-2-methylpropanesulfonic acid sodium salt.
Fourthly, performance test
Adhesives were prepared according to the methods of examples 1 to 3 and comparative examples 1 to 2, and the properties thereof were measured as test samples according to the following methods, and the test results are shown in table 1.
(1) Adopting a grading AC-10 common asphalt mixture provided by Ruixin asphalt materials GmbH to prepare 45 test blocks of 5cm multiplied by 15cm multiplied by 30 cm; cutting 45 coiled material samples of 2.5cm multiplied by 20 cm; dividing the test blocks and the coiled material samples into five groups, wherein each group comprises nine test blocks and nine coiled material samples which are respectively used for testing the performances of the samples in examples 1-3 and comparative examples 1-2;
(2) coating adhesive on the surface of the test block in a blade coating mode, wherein the adhesive amount is 60kg/m2Then, the coiled material samples are paved and pasted on the test blocks, three groups of the coiled material samples are marked as a group A, and the other three groups of the coiled material samples are marked as a group B; the surface of the first group of rolled material samples is free of weights, after the first group of rolled material samples are initially solidified, 200g of weights are pressed on the surface of the first group of rolled material samples, and the pressing time is 24 hours; the group B and the group C are respectively placed for 20min and 40min, and then a weight of 200g is pressed on the surface of the coiled material sample.
(3) Recording the actual operation time (namely, the coiled material sample is wrinkled due to resistance when the coiled material sample is moved) and the curing time of the group A, and after the adhesive is cured, peeling the coiled material sample from a test block according to GB/T2792-2014 test on adhesive tape peeling strength, wherein the tensile length is 5cm, the speed is 100mm/min, and the strength of the adhesive is recorded.
TABLE 1
The data in table 1 show that the adhesive prepared by the invention has longer operation time, is suitable for laying coiled materials in complex areas, has shorter curing time, can be quickly cured through the matching of weights after the laying is finished, can be adjusted according to the construction time, can be simultaneously used for laying simple areas and complex areas of runways, has excellent bonding strength, and can prolong the service life of the plastic runways.
The adhesive of comparative example 1 does not contain the component A and the component B, compared with example 1, the curing time of comparative example 2 is greatly increased, and the adhesive strength is reduced, which shows that the curing time can be shortened and the adhesive strength of the adhesive can be improved by adding the component C.
The adhesive of comparative example 2 does not contain titanium dioxide and nano-silica in the component A, and does not contain N-methylolacrylamide and hydroxyethyl acrylate in the component C; compared with the example 1, the curing time of the comparative example 2 is greatly increased, and the bonding strength is reduced, which shows that the curing time can be shortened and the bonding strength of the adhesive can be improved by adding the titanium dioxide, the nano-silicon dioxide N-hydroxymethyl acrylamide and the 2-acrylamide-2-methyl sodium propane sulfonate.
The construction of the plastic track is carried out according to the method of the application example, the construction condition of the plastic track is observed after 2 months after the construction, the phenomena of coiled material shrinkage, bulging, peeling and the like are not found after the investigation, and the use state of the plastic track is good.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. A construction process of a prefabricated plastic track is characterized in that: the method comprises the following steps:
s1, basic review: cleaning an asphalt base layer of a runway, and detecting the flatness of the asphalt base layer;
s2, adhesive coating: stirring the component A and the component B of the adhesive for 3min according to the weight ratio of 3:1, then adding the component C accounting for 120% of the weight of the component A, stirring for 2min, and coating the mixture on an asphalt base layer after stirring to form a bonding layer;
s3, laying of coiled materials: the PU coiled materials are laid on the bonding layer, and the butt joint positions of the adjacent PU coiled materials are cut orderly; cutting small areas, corners and areas with the width less than 1.22m according to the actual ground size and then laying;
s4, curing and forming: after the coiled material is laid, uniformly pressing a heavy object on the surface layer of the coiled material;
the component A of the adhesive comprises the following raw materials in parts by weight: 15-25 parts of polyoxypropylene triol, 10-15 parts of castor oil, 5-7 parts of filler, 3-5 parts of nano silicon dioxide and 0.03-0.05 part of catalyst;
the component B of the adhesive is formed by mixing diphenylmethane diisocyanate and polymethylene polyphenyl isocyanate in a weight ratio of (1-1.5) to 1;
the component C of the adhesive comprises the following raw materials in parts by weight: 30-40 parts of N-amyl acrylate, 5-10 parts of methyl methacrylate, 3-5 parts of isooctyl acrylate, 1-2 parts of N-hydroxymethyl acrylamide, 1-2 parts of hydroxyethyl acrylate, 1-2 parts of acrylic acid, 0.5-1 part of emulsifier, 0.3-0.5 part of sodium persulfate initiator and 30-40 parts of deionized water.
2. The construction process of the prefabricated plastic track according to claim 1, wherein the construction process comprises the following steps: the component A of the adhesive is prepared by the following method: taking 15-25 parts of polyoxypropylene triol, 10-15 parts of castor oil, 5-7 parts of filler and 3-5 parts of nano silicon dioxide, heating to 110-120 ℃, vacuumizing to-0.09 MPa, stirring for 20-30min, adding 0.03-0.05 part of catalyst, and stirring for 1-2h to obtain the component A.
3. The construction process of the prefabricated plastic track according to claim 1, wherein the construction process comprises the following steps: the catalyst is dibutyltin dilaurate.
4. The construction process of the prefabricated plastic track according to claim 1, wherein the construction process comprises the following steps: the filler is formed by mixing titanium dioxide and kaolin powder in a weight ratio of 1: 1.
5. The construction process of the prefabricated plastic track according to claim 1, wherein the construction process comprises the following steps: the component C of the adhesive is prepared by the following method: taking 30-40 parts of N-amyl acrylate, 5-10 parts of methyl methacrylate, 3-5 parts of isooctyl acrylate, 1-2 parts of N-hydroxymethyl acrylamide, 1-2 parts of hydroxyethyl acrylate, 1-2 parts of acrylic acid and 15-20 parts of deionized water by weight, and stirring for 30-60min to obtain an emulsion A;
heating 0.5-1 part of emulsifier and 15-20 parts of deionized water to 70-80 ℃, and stirring for 10-20min to obtain an emulsion B;
thirdly, heating the emulsion B to 85 ℃, dripping the emulsion B into the emulsion A for 1 to 2 hours, then adding 0.3 to 0.5 part of sodium persulfate initiator, keeping the temperature and stirring for 3 to 5 hours, and cooling to obtain the component C of the adhesive.
6. The construction process of the prefabricated plastic track according to claim 1, wherein the construction process comprises the following steps: the emulsifier is 2-acrylamide-2-methyl sodium propane sulfonate.
7. The construction process of the prefabricated plastic track according to claim 1, wherein the construction process comprises the following steps: s2, before the coil is laid, the moisture content of the ground is detected, and when the moisture content of the ground is less than or equal to 5%, the coil is laid.
8. The construction process of the prefabricated plastic track according to claim 1, wherein the construction process comprises the following steps: the dosage of the adhesive in S2 is 1.2kg/m2。
9. The construction process of the prefabricated plastic track according to claim 1, wherein the construction process comprises the following steps: the S4 weight is a sealed sand-filling bag with the weight of 20 kg.
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