CN101935459B - Pavement seam filling material - Google Patents
Pavement seam filling material Download PDFInfo
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- CN101935459B CN101935459B CN2010102835021A CN201010283502A CN101935459B CN 101935459 B CN101935459 B CN 101935459B CN 2010102835021 A CN2010102835021 A CN 2010102835021A CN 201010283502 A CN201010283502 A CN 201010283502A CN 101935459 B CN101935459 B CN 101935459B
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Abstract
The invention provides a pavement seam filling material. The pavement seam filling material is prepared from the following raw materials in part by weight: 100 parts of modified asphalt, 20 to 40 parts of rubber powder, 10 to 30 parts of softener, 5 to 20 parts of plasticizer, 1 to 10 parts of viscosifier and 3 to 10 parts of mineral filler, wherein the viscosifier and the plasticizer cooperate with each other to effectively enhance the low-temperature performance of the material and improve the long-term plasticity of the material to a large extent, namely, the long-term low temperature performance, so that the service life of the material is prolonged.
Description
Technical field
The present invention relates to a kind of pavement maintenance material, especially a kind of road surface gap-grouting material that is used for bituminous pavement, cement pavement etc.
Background technology
In recent years, the road surface Slit-pouring Technology is accepted by various places Road maintenance department more at large as a kind of effective preventive maintenance method.The material that the bituminous pavement cementation of fissures adopts is called base joint grouting glue (or seal gum).Base joint grouting glue adopts modifying asphalt macromolecule polymer material, heat construction usually.That base joint grouting glue should have is strong with bituminous concrete slotted wall viscosifying power, do not trickle during high temperature, performance such as not embrittlement during low temperature.
The rubber asphalt base joint grouting glue is meant that being used for pavement crack repairs, and is a class material of main raw material with rubber powder and pitch, the general heating form of construction work that adopts, and Heating temperature is between 180 ℃～200 ℃.The rubber asphalt base joint grouting glue is that the most frequently used a kind of material is repaired in the High Grade Bitumen Pavement crack, also can be used for the joint filling of cement pavement.
Adopt the rubber asphalt base joint grouting glue to repair the pavement crack history of existing decades abroad.Main brand company in the U.S. has: Crafco, Deery, Beram, Neyra, Maxwell, there is Roadseal in Korea S, and wherein Crafco (Ke Laifu), Deery (Di Rui), Beram (hundred energy), Roadseal (road guarantor) have all entered market, China's Mainland.Domestic manufacturer is also a lot, has: Zhengzhou hundred and big each card series of foot in farsighted black leech series, Xinxiang road in road fighter's series, Xinxiang, Shandong Hua Rui or the like.
Chinese patent application 200410010907.2 discloses a kind of road surface gap-grouting material and production technique, its by modifying asphalt, aromatic oil, styrene butadiene rubber powder, softening agent by weight the mark ratio constitute.This gap-grouting material has anti-preferably high and low temperature performance, and sticking toughness is stronger, and elastic recovery is preferably arranged.But because softening agent is easy to volatilization, life-time service, meeting influence the stability of road surface gap-grouting material performance owing to the volatilization of softening agent.
Because the road surface gap-grouting material all is that use on the road surface out of doors usually, working conditions is very harsh.Therefore ageing-resistant performance also is an extremely important index of road surface gap-grouting material.
Summary of the invention
For overcoming above-mentioned defective, the object of the present invention is to provide a kind of road surface gap-grouting material, it can improve the life-time service performance of road surface gap-grouting material.
For achieving the above object, road surface of the present invention gap-grouting material, it is characterized in that its by the raw material that comprises following component by weight the mark ratio make: 100 parts of modifying asphalts, 20～40 parts of rubber powders, 10～30 parts of tenderizers, 5～20 parts in softening agent, 1～10 part of tackifier, 3～10 parts of mineral fillers.
Preferably, in the gap-grouting material of road surface of the present invention, described raw material also comprises membrane-forming agent 1-10 part.
Modifying asphalt described in the present invention can be selected from styrene butadiene block copolymer modifying asphalt, ethylene vinyl acetate copolymer modifying asphalt, polyethylene modified asphalt, styrene butadiene rubber modified asphalt etc.Be preferably the styrene butadiene block copolymer modifying asphalt.
Rubber powder described in the present invention can comprise one or more in natural rubber powder and the styrene butadiene rubber powder, and preferred, described rubber powder is the waste tire powder.The main chemical compositions of waste tire has natural rubber, synthetic rubber, plasticizer, carbon black and ash to grade.Preferred, the particle diameter of described rubber powder is at least 40 orders, is more preferably 80 orders.
The main effect of tenderizer described in the present invention is plasticity-, snappiness, the visco-elasticity that increases the road surface gap-grouting material.On mechanical property, improve the displacement deformation ability of road surface gap-grouting material under cold condition exactly.Described tenderizer can adopt petroleum line softener, and it is a resulting product in the petroleum refining process, mainly contains machinery oil, transformer oil, heavy oil, Vaseline, aromatic hydrocarbon oil, naphthenic oil, second line of distillation oil, two wires oil, six line wet goods.
Softening agent described in the present invention is the soft solid materials that increases the road surface gap-grouting material.Described softening agent can be selected from dibutyl phthalate, the dioctyl phthalate (DOP) one or more.
Add the volume that mineral filler can increase the road surface gap-grouting material among the present invention, reduce cost, can also improve its thermotolerance.Mineral filler commonly used has: marble flour, talcum powder, fibrous magnesium silicate, synthon etc.
Tackifier among the present invention can be selected from one or more in natural resin tackifier and the petroleum resin tackifiers.Described natural resin tackifier can be rosin or terpine resin tackifier.Described petroleum resin tackifiers can be C5 petroleum resin or C9 petroleum resin.Described tackifier are preferably petroleum resin tackifiers, more preferably the C5 petroleum resin.
Be meant can be at the dry and hard film forming material of material surface for membrane-forming agent among the present invention, and it mainly acts on is in order to keep oil content and the volatile components in the gap-grouting material of road surface, to make its long-term plasticity and elastoplasticity of keeping, making the dry and hard film forming in gap-grouting material surface not volatile.Described membrane-forming agent can be vegetables oil and the animal oil that contains unsaturated double-bond.For example be Viscotrol C, tung oil, fish oil, flaxseed wet goods, be preferably sulfuration fish oil.
The present invention also provides the preparation method of a kind of road surface gap-grouting material, comprise modifying asphalt is heated to 160-180 ℃, dropping into rubber powder stirred 60～90 minutes, and then under 110-120 ℃ condition, other component raw material that just adds except that mineral filler is stirred on the limit, at last under 125-135 ℃ condition, drop into mineral filler, add the back stirring and be not less than 30 minutes.
In the gap-grouting material of road surface, the interpolation of softening agent is normally in order to improve the low-temperature performance of material.The use of tackifier is normally in order to increase the viscosifying power of gap-grouting material.The discovery that the applicant is surprised, in the application's the road surface gap-grouting material, tackifier are except the viscosifying power of itself, also played synergy with softening agent, the low-temperature performance of effective strongthener, also significantly improve the long-term plasticity of material simultaneously, promptly long-term low-temperature performance helps to prolong work-ing life of material.And the interpolation of membrane-forming agent has prevented the volatilization of plastic material and tackifier, has more improved the long-term plasticity of material.
Embodiment
Embodiment hereinafter is according to following identical condition and prepares the road surface gap-grouting material: comprise modifying asphalt is heated to 180 ℃, dropping into rubber powder stirred 60～90 minutes, and then under 110 ℃ condition, other component raw material that just adds except that mineral filler is stirred on the limit, at last under 125 ℃ condition, drop into mineral filler, add the back stirring and be not less than 30 minutes.
Comparing embodiment 1
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 8g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 126.7, and 82.6 ℃ of softening temperatures, the 2.8mm that flows, recovery of elasticity 46.0,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 34.57mm next time.
Comparing embodiment 2
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, C5 petroleum resin 7g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 87.4, and 89.3 ℃ of softening temperatures, the 0.6mm that flows, recovery of elasticity 54.4,50% 3 circulation of-30 ℃ of cryogenic tensiles is not passed through.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 12.07mm next time.
Embodiment 3
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 8g, C5 petroleum resin 7g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 113.3, and 84.1 ℃ of softening temperatures, the 1.6mm that flows, recovery of elasticity 52.3,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 46.14mm next time.
Compare with comparing embodiment 1, high-temperature behavior slightly improves behind the increase petroleum resin, and low-temperature performance has comparatively significantly raising.
Embodiment 4
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 8g, sulfuration fish oil 5g, C5 petroleum resin 7g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 121.2, and 82.9 ℃ of softening temperatures, the 2.3mm that flows, recovery of elasticity 50.7,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 41.48mm next time.
Compare with embodiment 3, considerable change does not take place in the short-term performance behind the increase sulfuration fish oil.
Comparing embodiment 5
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 5g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 120.3, and 85.2 ℃ of softening temperatures, the 1.5mm that flows, recovery of elasticity 47.8,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 27.34mm next time.
Comparing embodiment 6
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, C5 petroleum resin 1g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 89.8, and 86.8 ℃ of softening temperatures, the 1.2mm that flows, recovery of elasticity 56.9,50% 3 circulation of-30 ℃ of cryogenic tensiles is not passed through.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 7.15mm next time.
Embodiment 7
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 5g, C5 petroleum resin 1g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 107.1, and 84.7 ℃ of softening temperatures, the 1.6mm that flows, recovery of elasticity 51.6,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 33.27mm next time.
Compare with comparing embodiment 5, high-temperature behavior slightly improves behind the increase petroleum resin, and low-temperature performance has comparatively significantly raising.
Embodiment 8
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 5g, sulfuration fish oil 1g, C5 petroleum resin 1g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 111.6, and 84.9 ℃ of softening temperatures, the 2.0mm that flows, recovery of elasticity 53.2,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 30.13mm next time.
Compare with embodiment 7, considerable change does not take place in the short-term performance behind the increase sulfuration fish oil.
Comparing embodiment 9
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 20g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 140.4, and 78.3 ℃ of softening temperatures, the 4.5mm that flows, recovery of elasticity 44.6,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 57.03mm next time.
Comparing embodiment 10
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, C5 petroleum resin 10g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 80.7, and 92.3 ℃ of softening temperatures, the 0.0mm that flows, recovery of elasticity 61.2,50% 3 circulation of-30 ℃ of cryogenic tensiles is not passed through.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 13.21mm next time.
Embodiment 11
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 20g, C5 petroleum resin 10g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 130.4, and 81.9 ℃ of softening temperatures, the 3.0mm that flows, recovery of elasticity 53.3,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 49.22mm next time.
Embodiment 12
SBS modifying asphalt 100g, 80 order rubber powder 40g, second line of distillation oil 14g, dibutyl phthalate 20g, sulfuration fish oil 10g, C5 petroleum resin 10g, marble flour 10g.
Prepare the base joint grouting glue product by above-mentioned prescription and carry out performance test by the test method of transportation industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) defined.The gained test result is: cone penetration 137.2, and 82.4 ℃ of softening temperatures, the 2.7mm that flows, recovery of elasticity 51.5,50% 3 circulation of-30 ℃ of cryogenic tensiles, by.Satisfy the technical requirements of industry standard severe cold type base joint grouting glue.-30 ℃ of test conditionss are stretched to test specimen fracture, maximum tension displacement 45.42mm next time.
Embodiment 13
Weather resistance (long-term behaviour) is estimated:
A. immersion is aging
The immersion aging condition is defined as with reference to ASTM D5329: normal temperature immersion 96h.
B. thermal ageing
The thermal ageing condition is defined as with reference to ASTM D5329: place 70 ± 1 ℃ of baking oven 7d ± 2h.
C. ultraviolet ray ageing
Ultraviolet ray ageing is with reference to being defined as among the JT/T 589-2004: 300w, 168h, 40 ℃.
Test can be tested respectively behind every kind of aging condition, tests after also can experiencing three aging steps, and the more realistic condition of the latter, therefore, the present invention adopts the method for back.Testing sequence is as follows:
Behind Department of Transportation's industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009) making gap-grouting material tensile test specimen, immersion is aging earlier, thermal ageing then, last ultraviolet ray ageing, carry out the cryogenic tensile test then, estimate long-term behaviour according to the performance variation after aging, represent with aging coefficient.
Aging coefficient is to represent in the cryogenic tensile change in displacement before and after aging with pitch cementation of fissures closure material.
The cryogenic tensile test method is carried out according to Department of Transportation's industry standard " road surface rubber asphalt base joint grouting glue " (JT/T 740-2009), and test temperature is-30 ℃.
To the long-term plasticity evaluation of carrying out of above-mentioned 12 embodiment, experimental result is as shown in table 1 below.Wherein comparing embodiment 2, comparing embodiment 6 and comparing embodiment 10 are owing to fail by 50% 3 circulation experiment of-30 ℃ of cryogenic tensiles, so do not carry out durability evaluation.
Table 1 durability experiment result
According to table 1 as can be known, adopt technical scheme of the present invention to add the ageing-resistant performance that tackifier can significantly improve material.And the interpolation of membrane-forming agent has further improved ageing-resistant performance.
Claims (9)
1. road surface gap-grouting material, it is characterized in that its by the raw material that comprises following component by weight the mark ratio make: 100 parts of modifying asphalts, 20～40 parts of rubber powders, 10～30 parts of tenderizers, 5～20 parts of dibutyl phthalates, 1～10 part of C5 petroleum resin, 3～10 parts of mineral fillers.
2. road surface according to claim 1 gap-grouting material is characterized in that described raw material also comprises membrane-forming agent 1-10 part.
3. road surface according to claim 2 gap-grouting material is characterized in that described membrane-forming agent is vegetables oil and the animal oil that contains unsaturated double-bond.
4. road surface according to claim 3 gap-grouting material is characterized in that described membrane-forming agent is sulfuration fish oil.
5. according to arbitrary described road surface gap-grouting material among the claim 1-4, it is characterized in that described modifying asphalt is selected from styrene butadiene block copolymer modifying asphalt, ethylene vinyl acetate copolymer modifying asphalt, polyethylene modified asphalt, styrene butadiene rubber modified asphalt.
6. according to arbitrary described road surface gap-grouting material among the claim 1-4, it is characterized in that the particle diameter of described rubber powder is at least 40 orders.
7. road surface according to claim 6 gap-grouting material is characterized in that, the particle diameter of described rubber powder is 80 orders.
8. according to arbitrary described road surface gap-grouting material among the claim 1-4, it is characterized in that described tenderizer is selected from one or more in machinery oil, transformer oil, heavy oil, Vaseline, aromatic hydrocarbon oil, naphthenic oil, second line of distillation oil, two wires oil, the six line oil.
9. according to the preparation method of arbitrary described road surface gap-grouting material among the claim 1-8, comprise: modifying asphalt is heated to 160-180 ℃, dropping into rubber powder stirred 60～90 minutes, and then under 110-120 ℃ condition, add other component raw material except that mineral filler while stirring, at last under 125-135 ℃ condition, drop into mineral filler, add the back stirring and be not less than 30 minutes.
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| CN2010102835021A CN101935459B (en) | 2010-09-15 | 2010-09-15 | Pavement seam filling material |
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| CN2010102835021A CN101935459B (en) | 2010-09-15 | 2010-09-15 | Pavement seam filling material |
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| CN102535304A (en) * | 2012-03-19 | 2012-07-04 | 交通运输部公路科学研究所 | Crack pressing tape for cracks of asphalt road surface and preparation method of crack pressing tape |
| CN102618047A (en) * | 2012-03-31 | 2012-08-01 | 英达热再生有限公司 | Universal asphalt performance enhancing agent and preparation method thereof |
| CN102719105A (en) * | 2012-06-14 | 2012-10-10 | 曹天志 | Production formula and production process of special polymer modified bituminous waterproof rolls produced by wet pre-lay-up and cold adhesion methods |
| CN102775956B (en) * | 2012-08-08 | 2013-12-04 | 中国建筑材料科学研究总院苏州防水研究院 | Asphalt-based non-curable heat-resistant waterproof sealant and preparation method thereof |
| CN103805132A (en) * | 2012-11-13 | 2014-05-21 | 云南云岭高速公路养护绿化工程有限公司 | Joint filling glue for road maintenance and preparation method thereof |
| CN103589390B (en) * | 2012-12-06 | 2016-01-20 | 广东易山重工股份有限公司 | A kind of pavement crack repair material and preparation method thereof |
| CN103113848B (en) * | 2013-01-21 | 2015-07-22 | 江苏苏博特新材料股份有限公司 | Environment-friendly intermediate-temperature pavement pouring glue and preparation method thereof |
| CN103436038B (en) * | 2013-07-16 | 2016-08-10 | 交通运输部公路科学研究所 | A kind of unmade way bitumen regenerant and preparation method |
| CN103450692B (en) * | 2013-09-06 | 2016-04-27 | 武汉市市政建设集团有限公司 | A kind of regeneration half-flexible pavement material and preparation method thereof |
| CN103468006B (en) * | 2013-09-11 | 2014-07-02 | 广州市市政工程维修处 | Material for waste asphalt regeneration pavement and preparation method of material |
| CN103773019A (en) * | 2014-01-20 | 2014-05-07 | 南通东南公路工程有限公司 | Asphalt fish oil phenolic aldehyde waterproof material |
| CN104046044B (en) * | 2014-06-10 | 2016-06-01 | 广东易山重工股份有限公司 | A kind of energy-conservation pavement crack repair material and its preparation method |
| WO2016196155A1 (en) * | 2015-05-29 | 2016-12-08 | Cargill, Incorporated | Composite thermoplastic polymers based on reaction with biorenewable oils |
| CN105385178A (en) * | 2015-12-25 | 2016-03-09 | 长安大学 | Crack pouring material capable of preventing secondary cracking of road surface and preparation method thereof |
| CN105778533A (en) * | 2016-03-29 | 2016-07-20 | 河南省交通运输厅京珠高速公路新乡至郑州管理处 | High-permeability composite high-molecular polymer hot-melt crack filling material and preparation method |
| CN107722927A (en) * | 2017-09-11 | 2018-02-23 | 浙江理工大学 | A kind of bituminous paving high adhered modification cementation of fissures glue material and preparation method |
| CN113999650A (en) * | 2021-11-22 | 2022-02-01 | 长沙理工大学 | Low-temperature type crack pouring adhesive for asphalt pavement and preparation method thereof |
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| JPS60895B2 (en) * | 1981-03-13 | 1985-01-10 | 早川ゴム株式会社 | non-vulcanized rubber plate |
| CN1400245A (en) * | 2001-07-26 | 2003-03-05 | 金贤俊 | Pitch additive, mixture containing the additive and the production process and application of the mixture |
| CN1441004A (en) * | 2002-09-29 | 2003-09-10 | 袁永长 | Asphalt cold repairing binding material and its production process |
| CN1308412C (en) * | 2004-06-09 | 2007-04-04 | 吉林省交通科学研究所 | High-performance road surface fissures cementing materials and preparing process |
| CN101235207B (en) * | 2008-01-17 | 2010-11-10 | 徐培华 | Preparation method of asphalt pavement crevice embedding sealing material |
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