CN103740119B - Pre-prepared warm mix modifying asphalt and preparation method thereof - Google Patents
Pre-prepared warm mix modifying asphalt and preparation method thereof Download PDFInfo
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- CN103740119B CN103740119B CN201410003864.9A CN201410003864A CN103740119B CN 103740119 B CN103740119 B CN 103740119B CN 201410003864 A CN201410003864 A CN 201410003864A CN 103740119 B CN103740119 B CN 103740119B
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a kind of pre-prepared warm mix modifying asphalt and preparation method thereof.This pre-prepared warm mix modifying asphalt comprises the stablizer of the matrix pitch of 100 weight parts, the polymer modifiers of 2 ~ 10 weight parts, the strengthening agent of 0 ~ 6 weight part, the Rheology Promotors of 1 ~ 4 weight part, the tensio-active agent of 0.1 ~ 2 weight part, the emulsion whipping agent of 0.5 ~ 2 weight part and 0.05 ~ 0.5 weight part.
Description
Technical field
The present invention relates to the field of highway material and engineering thereof, particularly pre-prepared warm mix modifying asphalt of one and preparation method thereof.
Background technology
Along with the growing tension of the energy and the continuous worsening of environment, people start the road introspecting development, therefore the energy-conservation theme becoming current science and technology with environmental protection.In highway material field, traditional hot asphalt needs could carry out smoothly under the hot environment of 160 DEG C ~ 180 DEG C when producing and lay, the energy of at substantial preciousness in process, and gives off a large amount of flue gases and dust.Because the consumption of hot asphalt is huge, a large amount of gases of therefore discharging exacerbate Greenhouse effect, jeopardize again workmen and surrounding enviroment simultaneously.Therefore, people attempt adopting a kind of novel energy saving and environment friendly pitch.Compared with traditional hot asphalt, this energy saving and environment friendly bitumen construction temperature can be reduced to 130 DEG C ~ 150 DEG C, therefore is called as warm-mixed asphalt.Warm-mixed asphalt technology is flourish in recent years, and Patents is constantly seen in generation.
In the application of reality, warm-mixed asphalt is usually difficult to due to the defect of self satisfy the demands.Such as, due to the reduction of mix temperature, asphalt viscosity is high, and cause the adhesivity of gathering materials with pitch to decline, the mix effect of compound is bad, easily causes pitch and gather materials the phenomenon peeled off under severe environment.
Summary of the invention
Pre-prepared warm mix modifying asphalt that the object of the present invention is to provide at least one problem in a kind of can overcoming the above problems and preparation method thereof.
Pre-prepared warm mix modifying asphalt according to the present invention comprises the stablizer of the matrix pitch of 100 weight parts, the polymer modifiers of 2 ~ 10 weight parts, the strengthening agent of 0 ~ 6 weight part, the Rheology Promotors of 1 ~ 4 weight part, the tensio-active agent of 0.1 ~ 2 weight part, the emulsion whipping agent of 0.5 ~ 2 weight part and 0.05 ~ 0.5 weight part.
Pre-prepared warm mix modifying asphalt according to the present invention can comprise the stablizer of the matrix pitch of 100 weight parts, the polymer modifiers of 4 ~ 8 weight parts, the strengthening agent of 2 ~ 6 weight parts, the Rheology Promotors of 1.5 ~ 3 weight parts, the tensio-active agent of 0.5 ~ 1.5 weight part, the emulsion whipping agent of 0.8 ~ 1.7 weight part and 0.08 ~ 0.2 weight part.
Matrix pitch can be general road petroleum pitch.
Polymer modifiers can comprise at least one in styrene-butadiene-styrene block copolymer, polyethylene, polypropylene, nylon, polyvinyl chloride, ethylene-methyl acrylate copolymer, ethylene-propylene rubber(EPR), ethylene-vinyl acetate copolymer, natural rubber, polyhutadiene, polyisoprene, isoprene-isobutylene rubber, styrene butadiene rubbers, neoprene latex and waste tire rubber powder.
Strengthening agent can be rock asphalt.The softening temperature of rock asphalt can more than 65 DEG C and 25 DEG C of penetration numbers can at below 15dmm.
Rheology Promotors can be the melt blended material of polyethylene wax and nucleator, and the amount of nucleator can be the 0.05wt% ~ 0.5wt% of the amount of polyethylene wax.
Nucleator can be at least one in calcium stearate, Zinic stearas, stearic acid and 1,3:2,4-dibenzal sorbitol.
Tensio-active agent can be the combination of cats product or cats product and nonionogenic tenside, cats product can comprise at least one in Trimethyllaurylammonium bromide, cetyl trimethylammonium bromide, Dodecyl trimethyl ammonium chloride, and nonionogenic tenside can comprise at least one in alkylphenol polyoxyethylene, high-carbon fatty alcohol polyoxyethylene ether, polyoxyethylene carboxylate, polyoxyethylene amine, polyoxyethylate amide, the ethylene oxide adduct of polypropylene glycol, sorbitan ester.
Emulsion whipping agent can be at least one in organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion.Organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion can be all non-ionic type, and its solid content can be all 30% ~ 50%.
Stablizer can be at least one in elemental sulfur and sulfur donor.
The method of the pre-prepared warm mix modifying asphalt of preparation according to the present invention comprises: the strengthening agent of the matrix pitch of 100 weight parts of molten state and 0 ~ 6 weight part, the polymer modifiers of 2 ~ 10 weight parts, the Rheology Promotors of 1 ~ 4 weight part, the tensio-active agent of 0.1 ~ 2 weight part, the stablizer of 0.05 ~ 0.5 weight part, the emulsion whipping agent of 0.5 ~ 2 weight part are mixed.
Accompanying drawing explanation
Fig. 1 is the graduation curve gathered materials for evaluating the performance according to pre-prepared warm mix modifying asphalt of the present invention.
Fig. 2 illustrates the figure of the relative density of the compound prepared by the warm mix modifying asphalt of preparation example 10, preparation example 12 and preparation example 13 with the changing conditions of mix temperature.
Embodiment
The stablizer of the matrix pitch of 100 weight parts, the polymer modifiers of 2 ~ 10 weight parts, the strengthening agent of 0 ~ 6 weight part, the Rheology Promotors of 1 ~ 4 weight part, the tensio-active agent of 0.1 ~ 2 weight part, the emulsion whipping agent of 0.5 ~ 2 weight part and 0.05 ~ 0.5 weight part is comprised according to pre-prepared (Pre-mix) of the present invention warm mix modifying asphalt.In a preferred embodiment, pre-prepared warm mix modifying asphalt according to the present invention comprises the stablizer of the matrix pitch of 100 weight parts, the polymer modifiers of 4 ~ 8 weight parts, the strengthening agent of 2 ~ 6 weight parts, the Rheology Promotors of 1.5 ~ 3 weight parts, the tensio-active agent of 0.5 ~ 1.5 weight part, the emulsion whipping agent of 0.8 ~ 1.7 weight part and 0.08 ~ 0.2 weight part.
Matrix pitch can be general road petroleum pitch, and/or meets the technical requirements of China " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004) bi tumenf orr oad.But the present invention is not limited thereto, matrix pitch can be any suitable matrix pitch being applicable to warm-mixed asphalt.
Polymer modifiers can comprise at least one in styrene-butadiene-styrene block copolymer (SBS), polyethylene, polypropylene, nylon, polyvinyl chloride, ethylene-methyl acrylate copolymer, ethylene-propylene rubber(EPR), ethylene-vinyl acetate copolymer, natural rubber, polyhutadiene, polyisoprene, isoprene-isobutylene rubber, styrene butadiene rubbers (SBR), neoprene latex and waste tire rubber powder.
The effect of polymer modifiers mainly gives warm mix modifying asphalt good over-all properties, and that reduces warm-mixing agent component adds the detrimentally affect caused performance of asphalt mixture.Based on the matrix pitch of 100 weight parts, the amount of polymer modifiers is 2 ~ 10 weight parts.If the amount of polymer modifiers is less than 2 weight parts, polymer modifiers cannot play the effect of improving SNR; If the amount of polymer modifiers is more than 10 weight parts, then the viscosity of pre-prepared warm mix modifying asphalt is too high, cannot smooth construction.
In a preferred embodiment, polymer modifiers to be number-average molecular weight be 80000 ~ 150000 styrene-butadiene-styrene block copolymer (SBS), the styrene content of SBS is 20% ~ 40%(is more preferably 25% ~ 35%, is most preferably 30%), and molecular structure is line style.If the number-average molecular weight of SBS is lower than 80000, then possibly cannot play the effect of improving SNR; If the number-average molecular weight of SBS is higher than 150000, then make the viscosity of pre-prepared warm mix modifying asphalt too high, cannot smooth construction.
There is polymer modifiers according in pre-prepared warm mix modifying asphalt of the present invention, ensure that the properties of pitch and compound thereof, the existence reduced due to warm mix component causes the risk of performance degradation.
Strengthening agent can be rock asphalt, such as, softening temperature more than 65 DEG C and 25 DEG C of penetration numbers at the rock asphalt of below 15dmm, more specifically, softening temperature is more than 65 DEG C and at least one of 25 DEG C of penetration numbers in the natural rock asphalt and natural lake pitch of below 15dmm.In a preferred embodiment, strengthening agent is that softening temperature is more than 65 DEG C and 25 DEG C of penetration numbers produce Gilsonite natural rock asphalt and the softening temperature at least one more than 90 DEG C and in the natural lake pitch of TLA that produces in the lake, Trinida of below 5dmm of 25 DEG C of penetration numbers in the U.S. of below 15dmm.
Warm-mixed asphalt declines to a great extent due to mix and compacting temperature, and degree of aging reduces thereupon, objectively causes the reduction of pitch hardness, and therefore compared with hot asphalt, rut phenomenon easily occurs Warm-Mix Bitumen Mixture.The effect of strengthening agent is to improve the ability of warm-mixed asphalt in high temperature section opposing tension set, also contributes to the raising of low temperature section pitch sag simultaneously.According to the actual requirements, based on the matrix pitch of 100 weight parts, the consumption of strengthening agent, in 0 ~ 6 weight part, can improve pitch hardness and compound dynamic stability effectively; But when consumption is more than 6 weight part, detrimentally affect may be caused to compound low temperature ductility.
According to concrete application scenario, pre-prepared warm mix modifying asphalt of the present invention can not contain strengthening agent.That is, state " strengthening agent of 0 ~ 6 weight part " and cover the situation (strengthening agent of 0 weight part) not comprising strengthening agent.
The effect of Rheology Promotors is to improve the rheological property under asphalt high-temperature state, significantly can reduce viscosity during asphalt mixing, improve the mix effect of compound, and this point is for particularly important warm mix modifying asphalt.
Can be used as the conventional polyvinyl wax of Rheology Promotors traditionally (such as, in CN102532920A and CN101765641A) molecular weight distribution wide, the degree of branching is high, fusing point is low, crystal particle diameter is compared with large and defect is many, poor mechanical property, be added into the reduction easily causing low-temperature flexibility in pitch, that is, in low temperature section, huge undesirable action is produced to pitch ductility.Especially for the pitch after high temperature ageing, conventional polyvinyl wax is very easy to cause the brittle failure of bituminous material in low-temperature ductility test.
According to the Rheology Promotors comprised in pre-prepared warm mix modifying asphalt of the present invention can be polyethylene wax and nucleator melt blended material (or be called with nucleator melt blending after polyethylene wax).Polyethylene wax as Rheology Promotors raw material can be the by product in polyethylene synthesis; But the source of polyethylene wax is not limited thereto, any known method can be adopted to obtain polyethylene wax.Nucleator can be at least one in calcium stearate, Zinic stearas, stearic acid and 1,3:2,4-dibenzal sorbitol.In the melt blended material of polyethylene wax and nucleator, the amount of nucleator is the 0.05wt% ~ 0.5wt% of polyethylene wax, is preferably 0.1wt% ~ 0.4wt%, is more preferably 0.15wt% ~ 0.3wt%, is most preferably 0.2wt%.If the amount of nucleator is less than the 0.05wt% of polyethylene wax, then polyethylene wax crystal cannot be made effectively to recombinate; If the amount of nucleator is more than the 0.5wt% of polyethylene wax, then may have a negative impact to the performance of Rheology Promotors.
Can by the polyethylene wax of melting and nucleator Homogeneous phase mixing that is solid-state or molten state be also cooled the melt blended material preparing polyethylene wax and nucleator.In an embodiment, can by the polyethylene wax of melting and solid-state nucleator Homogeneous phase mixing be also cooled the melt blended material preparing polyethylene wax and nucleator.In the particular embodiment, the method comprised the steps can be adopted to prepare the melt blended material of polyethylene wax and nucleator: polyethylene wax is heated to more than 140 DEG C (such as, 160 DEG C) in molten state, slowly add the nucleator after a certain amount of drying porphyrize, constant temperature stirs 20 ~ 60min(such as, 30min) lowering the temperature afterwards leaves standstill more than 30min (such as, 40min), cutting granulation, obtains the melt blended material of polyethylene wax and nucleator.
Crystallization nucleating agent melting mixing can be added in conventional polyvinyl wax as the polyethylene wax of Rheology Promotors and the melt blended material of nucleator to form.Nucleator (or being called crystallization promoter) plays heterogeneous nucleating effect in polyethylene wax, and refinement grain-size, make the more complete densification of the accumulation of crystal, macroscopically fusing point and mechanical property are all highly improved.Therefore, crystallization recombinant type Rheology Promotors can be called as the polyethylene wax of Rheology Promotors and the melt blended material of nucleator.In the melt blended material of polyethylene wax and nucleator, due to the use of nucleator, the fusing point of polyethylene wax is made to be promoted to about 122 DEG C by about 98 DEG C, close to warm mix temperature, this means to form the more perfect crystal of crystalline structure in the time that polyethylene wax can be grown relatively in relatively high temperature, focal point of stress is less, and corresponding low-temperature ductility improves obviously, contributes to reducing the problems such as the stress cracking that lattice defect causes.
Therefore, viscosity when not only can reduce asphalt mixing as the polyethylene wax of Rheology Promotors and the melt blended material of nucleator to improve the mix effect of compound, and can contribute to reducing the problems such as stress cracking that lattice defect causes.
Such as, with the addition of 5 DEG C of ductilities of the pitch of common polythene wax at about 20cm, adopt 5 DEG C of ductilities of the pitch (same recipe) of the melt blended material of polyethylene wax and nucleator at more than 40cm, ductility significantly improves.This effect be reflected in real road is, under low temperature environment, adopts the asphalt road of the melt blended material of polyethylene wax and nucleator that the phenomenon of stress cracking is less likely to occur.
If based on the matrix pitch of 100 weight parts, the amount of Rheology Promotors is less than 1 weight part, then the viscosity degradation of warm mix modifying asphalt is not obvious, cannot reach the effect of warm mix.If based on the matrix pitch of 100 weight parts, the amount of Rheology Promotors more than 4 weight parts, then may damage the low-temperature performance of warm mix modifying asphalt.
Tensio-active agent can be the combination of cats product or cats product and nonionogenic tenside.Cats product can comprise at least one in Trimethyllaurylammonium bromide, cetyl trimethylammonium bromide, Dodecyl trimethyl ammonium chloride.Nonionogenic tenside can comprise at least one in alkylphenol polyoxyethylene, high-carbon fatty alcohol polyoxyethylene ether, polyoxyethylene carboxylate, polyoxyethylene amine, polyoxyethylate amide, the ethylene oxide adduct of polypropylene glycol, sorbitan ester.
Preferably, tensio-active agent is the combination of cats product and nonionogenic tenside.This is because and be used alone compared with cats product, the combination of cats product and nonionogenic tenside can make the surface energy between pitch reduce more.Cats product can promote to gather materials and adsorption between pitch, so be required.
The effect of tensio-active agent is to reduce pitch and surface tension between gathering materials, effectively can promote that pitch is to the coated and combination of gathering materials.If based on the matrix pitch of 100 weight parts, the amount of tensio-active agent is less than 0.1 weight part, then do not have and reduce pitch and capillary effect between gathering materials, thus makes pitch cannot mix at low temperatures effectively; If based on the matrix pitch of 100 weight parts, the amount of tensio-active agent more than 2 weight parts, then can have a negative impact to the physicals of pre-prepared warm mix modifying asphalt.
Emulsion whipping agent can be at least one in organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion.Organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion can be all non-ionic type, and its solid content can be all 30% ~ 50%, is preferably 40% ~ 50%, is most preferably 48%.If the solid content of organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion is lower than 30%, then too much liquid phase (such as water) significantly can reduce the physicals of pre-prepared warm mix modifying asphalt.If the solid content of organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion is higher than 50%, then cause emulsion unstable, that is, the general solid content of the emulsion of stable existence can not more than 50%.
In addition, the pH value of organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion all can be 7 ~ 9, and temperature resistant range all can be 200 DEG C ~ 500 DEG C.
Possess higher heat resisting temperature (or high temperature durability) and good weather resistance as the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion, be suitable for adding in the heated bitumen under the condition of high temperature.As the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion at normal temperatures in emulsion state, add after in the pitch under high temperature, aqueous phase heat wherein comes to life volatilization, its steam discharged can make pitch produce a large amount of foam, volume fully expands, pitch intermolecular forces (force of cohesion) obviously reduces, coordinate Rheology Promotors again, the viscosity of pitch is reduced further, thus realize pitch and the construction of gathering materials under middle temperature, improve the mix effect of compound.In addition, as the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion after aqueous phase evaporation, residuum (resin-phase) is stayed in pitch as polymer floss, evenly spread in pitch medium after the shearing action of high-speed stirring, counteract again a part due to pitch intermolecular forces decline bring to mixture performance potential risks, such as, the peeling phenomenon caused because foaming effect impels pitch to decline with the intermolecular forces gathered materials can be improved, objectively serve the effect of antistripping agent.In addition, as in the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion itself also with a small amount of surfactant component, coordinate other tensio-active agent, effectively can promote that pitch is to the coated and combination of gathering materials.To sum up, add as the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion the viscosity reducing pitch, its remaining superpolymer component of high temperature and tensio-active agent in turn ensure that pitch and keying action between gathering materials.Therefore, can make pitch on the one hand and gather materials to carry out production and construction at a lower temperature, the asphalt generated on the other hand has excellent high thermal resistance, water resisting property and resistance to flaking.
Commercially available organosilicon-modified acrylate emulsion can be used as emulsion whipping agent, or can according to known method, such as CN1362430A, CN1362432, CN1546542A, " synthesis of organosilicon-modified acrylate emulsion and morphological analysis " (Yan Wei etc., " chemistry and biotechnology ", 8th phase in 2011), " synthesis of organosilicon-modified acrylate emulsion and performance study thereof " (Zhang Baolian etc., " coatings industry ", 2nd phase in 2008), " the preparation and property research of organosilicon modified acrylic ester microemulsion " (Peng He tests, " bonding ", 1st phase in 2010) etc. disclosed in method prepare organosilicon-modified acrylate emulsion.Commercially available organosilicon modified styrene-acrylate copolymer emulsion can be used as emulsion whipping agent, or can according to known method, such as CN1456577A, CN101649014A, " organosilicone-modified styrene-acrylic emulsion research " (Xu Chongfu etc., " Ningxia engineering ", the 1st phase in 2005) etc. disclosed in method prepare organosilicon modified styrene-acrylate copolymer emulsion.But, source and the preparation method of organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion are not limited thereto, and any suitable method known in the art can be used to prepare organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion.
If based on the matrix pitch of 100 weight parts, the amount of emulsion whipping agent is less than 0.5 weight part, then emulsion whipping agent reduction pitch intermolecular forces thus to fall low viscous effect not obvious.If based on the matrix pitch of 100 weight parts, the amount of emulsion whipping agent is more than 2 weight parts, then the existence of excessive whipping agent changes the weave construction of pitch, significantly reduces the hardness of pitch, and high-temperature behavior declines obviously, and low-temperature performance also deterioration is serious.In addition, if based on the matrix pitch of 100 weight parts, the amount of emulsion whipping agent is more than 2 weight parts, then foaming effect is greater than antistripping effect, and compound peeling phenomenon occurs.
The realization of warm mix effect needs the oneself viscosity reducing pitch on the one hand, needs on the other hand to reduce pitch and surface tension between gathering materials.As the polyethylene wax of Rheology Promotors and the melt blended material of nucleator and the oneself viscosity reducing pitch as the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion, reduce pitch as the tensio-active agent in the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion and other tensio-active agent and surface tension between gathering materials, effectively promote that pitch is to the coated and combination of gathering materials.The reduction of asphalt viscosity and capillary reduction all contribute to the raising of mix effect.Therefore, as the polyethylene wax of Rheology Promotors and nucleator melt blended material, as the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion and tensio-active agent, positive synergy is served for the raising of mix effect.
In order to induced polymer properties-correcting agent and the matrix pitch rock asphalt of strengthening agent (and/or as) are polymerized, need to add stablizer.In addition, stablizer can make the memory property of warm mix modifying asphalt up to standard, segregation phenomenon does not occur, ensure that the stability of Structure and Properties in storage transportation.Stablizer can be at least one in elemental sulfur and sulfur donor.If based on the matrix pitch of 100 weight parts, the amount of stablizer is less than 0.05 weight part, then stability in storage and elasticity can be deteriorated, and easily emanate, and the pavement performance of warm mix modifying asphalt reduces.If based on the matrix pitch of 100 weight parts, the amount of stablizer more than 0.5 weight part, then can increase the viscosity of warm mix modifying asphalt, thus is unfavorable for production and the construction of carrying out compound.
Manufacture method according to pre-prepared warm mix modifying asphalt of the present invention is described hereinafter.
Can prepare according to pre-prepared warm mix modifying asphalt of the present invention by the matrix pitch of molten state is mixed with strengthening agent (if any), polymer modifiers, Rheology Promotors, tensio-active agent, stablizer, emulsion whipping agent.
In one embodiment, can be prepared by the method comprised the steps according to pre-prepared warm mix modifying asphalt of the present invention: the matrix pitch of molten state is mixed with strengthening agent (if any), polymer modifiers, Rheology Promotors, tensio-active agent, stablizer, obtain mixture, then this mixture is mixed with emulsion whipping agent and foam.
In one embodiment, can be prepared by the method comprised the steps according to pre-prepared warm mix modifying asphalt of the present invention: the matrix pitch of molten state is mixed with strengthening agent (if any), then the matrix pitch of molten state and the mixture of strengthening agent are mixed with polymer modifiers, Rheology Promotors and tensio-active agent, obtain mixture, afterwards this mixture is mixed with stablizer, then add emulsion whipping agent and foam.
In one embodiment, can be prepared by the method comprised the steps according to pre-prepared warm mix modifying asphalt of the present invention: the matrix pitch of molten state is mixed with strengthening agent (if any), then the matrix pitch of molten state and the mixture of strengthening agent are mixed with the premixture of polymer modifiers, Rheology Promotors and tensio-active agent, obtain mixture, afterwards this mixture is mixed with stablizer, then add emulsion whipping agent and foam.
In one embodiment, can be prepared by the method comprised the steps according to pre-prepared warm mix modifying asphalt of the present invention:
(1) first matrix pitch is heated to 130 DEG C ~ 150 DEG C, according to circumstances adds a certain amount of strengthening agent, stir, such as, more than high-speed stirring 10min, more specifically 10 ~ 30min;
(2) polymer modifiers, Rheology Promotors and tensio-active agent are pre-mixed in the mixture of matrix pitch and the strengthening agent joining 150 DEG C ~ 170 DEG C evenly, stir, such as, more than 30min is stirred, more specifically 30 ~ 60min when improving stirring velocity;
(3) when stirring (such as, observe the curent change situation of homogenizer, illustrate that modifying asphalt mixture inside reaches equilibrium state when keeping stablizing), add appropriate stablizer, stirring velocity can be reduced slightly, impel between pitch and polymer modifiers and form stable molecular bonding structure, the Keep agitation time can be such as 1 ~ 3h;
(4) last, stirrer can be down to low cruise, slowly drip emulsion whipping agent, note the changing conditions of observing modifying asphalt liquid level, prevent modifying asphalt foamed phenomenon too violent, the Keep agitation time roughly can be such as 15 ~ 60min.
The step that hot pre-prepared warm mix modifying asphalt is cooled also can be comprised according to the manufacture method of pre-prepared warm mix modifying asphalt of the present invention.
At least one in following effect can be obtained according to pre-prepared warm mix modifying asphalt of the present invention and preparation method thereof:
1, pre-prepared warm mix modifying asphalt according to the present invention has polymer modifiers, ensure that pitch and compound properties thereof, and the existence reduced due to warm mix component causes the risk of performance degradation.
2, pre-prepared warm mix modifying asphalt according to the present invention can have strengthening agent, makes pitch anti-rut behavior more outstanding.
3, pre-prepared warm mix modifying asphalt according to the present invention has stablizer, polymer modifiers and the matrix pitch rock asphalt of strengthening agent (and/or as) can be made to be polymerized, make warm mix modifying asphalt memory property up to standard, there is not segregation phenomenon in transit in storage, ensure that the stability of Structure and Properties.
4, as the fusing point of the polyethylene wax of Rheology Promotors and the melt blended material of nucleator close to warm mix temperature, therefore form the complete crystal of crystalline structure in the time that polyethylene wax can be grown relatively in relatively high temperature, contribute to reducing the problems such as the stress cracking that causes of lattice defect.
5, as the organosilicon-modified acrylate emulsion of emulsion whipping agent or the use of organosilicon modified styrene-acrylate copolymer emulsion, viscosity during asphalt mixing is reduced further, improve the mix effect of compound.
6, as the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion after aqueous phase evaporation, residuum is stayed in pitch as polymer floss, counteract a part due to pitch intermolecular forces decline bring to mixture performance potential risks, such as, the peeling phenomenon caused because foaming effect impels pitch to decline with the intermolecular forces gathered materials can be improved, objectively serve the effect of antistripping agent.
7, as in the organosilicon-modified acrylate emulsion of emulsion whipping agent or organosilicon modified styrene-acrylate copolymer emulsion itself also with a small amount of surfactant component, coordinate other tensio-active agent, effectively can promote that pitch is to the coated and combination of gathering materials.
8, warm mix modifying asphalt according to the present invention is a kind of pre-prepared (Pre-mix) warm mix modifying asphalt, and namely warm mix Technology application is in the modifying asphalt production phase, prior to the mix of compound, adds the warm-mixed asphalt of warm-mixing agent when it is different from site operation.Therefore, save the operation in the compound mix stage, simultaneously because pre-prepared warm-mixed asphalt possesses better homogeneity, warm mix better effects if.In addition, warm-mixing agent is added (namely in modifying asphalt generative process, Rheology Promotors, emulsion whipping agent and/or tensio-active agent), (viscosity of polymer modifiers is higher significantly can to reduce the wearing and tearing of whipping device, during stirring, equipment moment of torsion is larger, the interpolation of warm-mixing agent significantly can reduce viscosity), bring the reduction of energy consumption.
9, the utilization of warm mix technology can reduce equipment loss and the energy consumption of modifying asphalt production phase.
Below in conjunction with example, pre-prepared warm mix modifying asphalt according to the present invention and preparation method thereof is described in more detail.
preparation example 1: as the preparation of the polyethylene wax of Rheology Promotors and the melt blended material of nucleator
Be 2000 polyethylene wax (SKwax by molecular weight, YUCLAIR) 160 DEG C are heated in molten state, slow add-on is 1 after the drying porphyrize of the 0.2wt% of polyethylene wax, 3:2,4-dibenzal sorbitol, constant temperature stirs cooling after 30min and leaves standstill 40min, cutting granulation, obtains the melt blended material of polyethylene wax as Rheology Promotors and nucleator.
preparation example 2: as the preparation of the polyethylene wax of Rheology Promotors and the melt blended material of nucleator
Be 2000 polyethylene wax (SKwax by molecular weight, YUCLAIR) 165 DEG C are heated in molten state, slow add-on is the calcium stearate after the drying porphyrize of the 0.5wt% of polyethylene wax, after constant temperature stirs 50min, cooling leaves standstill 50min, cutting granulation, obtains the melt blended material of polyethylene wax as Rheology Promotors and nucleator.
preparation example 3: as the preparation of the polyethylene wax of Rheology Promotors and the melt blended material of nucleator
Be 2000 polyethylene wax (SKwax by molecular weight, YUCLAIR) 170 DEG C are heated in molten state, slow add-on is the stearic acid after the drying porphyrize of the 0.05wt% of polyethylene wax, after constant temperature stirs 40min, cooling leaves standstill 60min, cutting granulation, obtains the melt blended material of polyethylene wax as Rheology Promotors and nucleator.
preparation example 4: as the preparation of the polyethylene wax of Rheology Promotors and the melt blended material of nucleator
Be 2000 polyethylene wax (SKwax by molecular weight, YUCLAIR) 160 DEG C are heated in molten state, slow add-on is the Zinic stearas after the drying porphyrize of the 0.2wt% of polyethylene wax, after constant temperature stirs 30min, cooling leaves standstill 40min, cutting granulation, obtains the melt blended material of polyethylene wax as Rheology Promotors and nucleator.
preparation example 5 to preparation example 22: the preparation of pre-prepared warm mix modifying asphalt
First the matrix pitch SK-70# bi tumenf orr oad of 100 weight parts is heated to a DEG C, the rock asphalt as strengthening agent is added matrix pitch, then high-speed stirring b minute.Polymer modifiers, Rheology Promotors and tensio-active agent are mixed, then adding temperature is in the mixture of the matrix pitch of c DEG C and strengthening agent, improves stirring velocity further, Keep agitation d minute.Observe the curent change situation of homogenizer, illustrate that modifying asphalt mixture inside reaches equilibrium state when keeping stablizing, at this moment stablizer is added, and reduce stirring velocity slightly, impel between pitch and polymer modifiers and form stable molecular bonding structure, the time of more than Keep agitation e hour.Finally, stirrer is down to low cruise, slowly drips emulsion whipping agent, note the changing conditions of observing modifying asphalt liquid level, prevent modifying asphalt foamed phenomenon too violent, Keep agitation time f minute.Then, cool, obtain pre-prepared warm mix modifying asphalt.
List in the processing parameter used in the method for preparation example 5 to preparation example 22 table 1 below:
Table 1:
| a（℃） | B(minute) | c（℃） | D(minute) | E(hour) | F(minute) | |
| Preparation example 5 | 150 | 30 | 170 | 30 | 2 | 15 |
| Preparation example 6 | 150 | 28 | 168 | 60 | 1 | 40 |
| Preparation example 7 | 142 | 23 | 150 | 45 | 2.5 | 42 |
| Preparation example 8 | 140 | 19 | 153 | 40 | 3 | 35 |
| Preparation example 9 | 135 | 10 | 155 | 40 | 1.5 | 22 |
| Preparation example 10 | 135 | 23 | 152 | 50 | 1.5 | 60 |
| Preparation example 11 | 145 | 17 | 170 | 55 | 2.5 | 20 |
| Preparation example 12 | 144 | 25 | 150 | 35 | 2 | 25 |
| Preparation example 13 | 147 | 26 | 159 | 60 | 2.5 | 52 |
| Preparation example 14 | 130 | 28 | 163 | 40 | 2.5 | 32 |
| Preparation example 15 | 137 | 15 | 165 | 50 | 2 | 40 |
| Preparation example 16 | 143 | 20 | 168 | 55 | 2.5 | 30 |
| Preparation example 17 | 133 | 10 | 150 | 40 | 3 | 25 |
| Preparation example 18 | 137 | 12 | 150 | 45 | 1 | 20 |
| Preparation example 19 | 135 | 14 | 165 | 45 | 2.5 | 45 |
| Preparation example 20 | 144 | 18 | 170 | 30 | 3 | 52 |
| Preparation example 21 | 139 | 28 | 155 | 45 | 1 | 50 |
| Preparation example 22 | 140 | 30 | 162 | 55 | 1.5 | 55 |
List in each component used in the method for preparation example 5 to preparation example 22 and amount (weight part) table 2 below thereof:
Table 2
In table 2, SBS to be styrene content be 30% bright and beautiful lake KTR-101 type SBS, number-average molecular weight is about 120,000; SBR is bright and beautiful lake 1502 type SBR; " Gilsonite " represents that softening temperature is 85 DEG C and the U.S. that 25 DEG C of penetration numbers are 3dmm produces Gilsonite natural rock asphalt; " TLA " represents that softening temperature is at about 95 DEG C and the natural lake pitch of TLA that produces in the lake, Trinida of about 2dmm of 25 DEG C of penetration numbers; " brometo de amonio " represents Trimethyllaurylammonium bromide; " brometo de amonio+Vinyl Ether " represents the blend of Trimethyllaurylammonium bromide and alkylphenol polyoxyethylene (weight ratio 2:1); " organosilicon third " represents that solid content is Beijing Proview latex company limited BP – 108 organosilicon-modified acrylate emulsion of 50%; " organosilicon phenylpropyl alcohol " represents that solid content is Gansu Jindun Chemical Co., Ltd. JD-6108 type organosilicon modified styrene-acrylate copolymer emulsion of 48 ± 2%.
comparative example 1: the preparation of pre-prepared warm mix modifying asphalt
Be that 2000 polyethylene waxs (SKwax, YUCLAIR) replace, outside the Rheology Promotors of preparation in preparation example 1, preparing pre-prepared warm mix modifying asphalt according to the mode identical with the mode of preparation example 6 except using the molecular weight used in preparation example 1.
comparative example 2: the preparation of pre-prepared warm mix modifying asphalt
Except the Rheology Promotors of preparation in the preparation example 1 using 0.5 weight part, prepare pre-prepared warm mix modifying asphalt according to the mode identical with the mode of preparation example 6.
comparative example 3: the preparation of pre-prepared warm mix modifying asphalt
Except the Rheology Promotors of preparation in the preparation example 1 using 5 weight parts, prepare pre-prepared warm mix modifying asphalt according to the mode identical with the mode of preparation example 6.
comparative example 4: the preparation of pre-prepared warm mix modifying asphalt
Except using common acrylic ester emulsion to replace solid content to be except Beijing Proview latex company limited BP – 108 organosilicon-modified acrylate emulsion of 50%, prepare pre-prepared warm mix modifying asphalt according to the mode identical with the mode of preparation example 6.
comparative example 5: the preparation of pre-prepared warm mix modifying asphalt
Except using the solid content of 0.1 weight part to be except Beijing Proview latex company limited BP – 108 organosilicon-modified acrylate emulsion of 50%, prepare pre-prepared warm mix modifying asphalt according to the mode identical with the mode of preparation example 6.
comparative example 6: the preparation of pre-prepared warm mix modifying asphalt
Except using the solid content of 2.5 weight parts to be except Beijing Proview latex company limited BP – 108 organosilicon-modified acrylate emulsion of 50%, prepare pre-prepared warm mix modifying asphalt according to the mode identical with the mode of preparation example 6.
comparative example 7: business-like SKI-D modifying asphalt
evaluation Example 1: the performance evaluating modifying asphalt
After penetration degree, softening temperature, Rutting parameter, rotary viscosity, ductility, segregation, weightlessness, baking in ductility, evaluate the pre-prepared warm mix modifying asphalt prepared according to preparation example 5 to preparation example 22 and comparative example 1 to comparative example 6, and the modifying asphalt of comparative example 7.Shown in result table 3 below to table 6.
Table 3
Table 4
Table 5
Table 6
Compared with the commercialization modifying asphalt of comparative example 7 by the pre-prepared warm mix modifying asphalt prepared according to preparation example 5 to preparation example 22, known pre-prepared warm mix modifying asphalt according to the present invention has the viscosity obviously declined generally.
In addition, the segregation experimental result of the pre-prepared warm mix modifying asphalt of all preparation examples shows, pre-prepared warm mix modifying asphalt of the present invention is each mutually homogeneous, all possesses good storage stability and easy act.
By known for the results contrast of the result of preparation example 6 and comparative example 1, because use common polyethylene wax as Rheology Promotors in comparative example 1, so its softening temperature, Rutting parameter and low-temperature ductility all decline to some extent than preparation example 6.
By known for the results contrast of the result of preparation example 6 and comparative example 2, because the amount of the Rheology Promotors used in comparative example 2 is less than 1 weight part, so its penetration degree improves, rotary viscosity improves, and this illustrates that low temperature flowability is not enough.
By known for the results contrast of the result of preparation example 6 and comparative example 3, when the amount of the Rheology Promotors used in comparative example 3 is more than 4 weight parts, Rutting parameter improves, illustrate that high temperature anti-rut behavior obtains to promote, but low-temperature ductility declines to a great extent, illustrate that adding excessive flow improver additive can make modifying asphalt low-temperature performance serious deterioration.
By known for the results contrast of the result of preparation example 6 and comparative example 4, because use common acrylic ester emulsion as emulsion whipping agent in comparative example 4, so softening temperature and Rutting parameter all decrease, this illustrates that the high-temperature behavior of modifying asphalt declines to some extent.
By known for the results contrast of the result of preparation example 6 and comparative example 5, when the organosilicon-modified acrylate emulsion used in comparative example 5 is less than 0.5 weight part, although high-temperature behavior promotes to some extent, the raising of viscosity have impact on warm mix effect.
By known for the results contrast of the result of preparation example 6 and comparative example 6, when the organosilicon-modified acrylate emulsion used in comparative example 6 is more than 2 weight part, the existence of excessive whipping agent changes the weave construction of pitch, significantly reduce the hardness of pitch, high-temperature behavior declines obviously, and low-temperature performance also deterioration is serious.
evaluation Example 2: the performance evaluating modified asphalt mixture
Adopt Marshall gradation design method to carry out the gradation design of compound, through screening strength, used gathering materials meets the code requirement about AC-13 in China " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004).Wherein coarse aggregate is high-quality basalt, and fine aggregate is limestone machine-made sand, and breeze is fat lime rock breeze.In size distribution, gathering materials of 10 ~ 15mm interval accounts for 32% of total mass of gathering materials, and 5 ~ 10mm accounts for 24%, and 0 ~ 5mm accounts for 36%, and breeze accounts for 8%, and concrete graduation curve as shown in Figure 1.
Under different modified asphalt content, utilize the pre-prepared warm mix modifying asphalt of preparation example 5 to preparation example 22 and gather materials and prepare marshal piece, carry out bulk specific gravity test, the test of vacuum method maximum theory density, Marshall stability and flow valuve determination test respectively.Experimental result shows, and best modifying asphalt content is 4.6% of aggregate quality.For convenience of contrast, the modifying asphalt content adopted in evaluation Example 2 is 4.6%.
For assessing the warm mix effect of pre-prepared warm mix modifying asphalt of the present invention, the mix of warm mix modifying asphalt and compacting temperature reduce by 15 DEG C, 20 DEG C and 30 DEG C respectively on the basis of the common I-D modifying asphalt of comparative example 7, the marshal piece measuring warm mix modified asphalt mixture bulk specific gravity at different temperatures and porosity.With relative density-mix temperature for coordinate axis, draw warm mix modified asphalt mixture bulk specific gravity variation with temperature trend map, as shown in Figure 2.
In fig. 2, WMA-1 represents the marshal piece prepared by the warm mix modifying asphalt of preparation example 10, and WMA-2 represents the marshal piece prepared by the warm mix modifying asphalt of preparation example 12, and WMA-3 represents the marshal piece prepared by the warm mix modifying asphalt of preparation example 13.Can find out by Fig. 2, the bulk specific gravity of warm mix modified asphalt mixture reduces along with the reduction of mix temperature, and both are substantially linear.Standard I-D modifying asphalt (such as, the common I-D modifying asphalt of comparative example 7) marshal piece bulk density at mix temperature is 170 DEG C is about 2.46, and the relative density-mix temperature straight line of each warm mix modifying asphalt of the present invention and standard I-D modifying asphalt can think the best mix temperature of this warm mix modifying asphalt at the point that the relative density straight line of 170 DEG C of mixs coincides.Result shows, and the best mix temperature of the warm mix modified asphalt mixture corresponding with preparation example 10 is minimum, and the mix temperature of comparison with standard I-D modifying asphalt 170 DEG C, can have the decline of 15 ~ 20 DEG C.This result shows, warm mix modifying asphalt of the present invention can realize the bulk specific gravity that plain asphalt needs at high temperature mix just can reach at lower mix temperature, confirms the construction property that this warm mix modifying asphalt is good.
For verifying the premium properties of warm mix modified asphalt mixture of the present invention further, the experiment of water stability is done to marshal piece, the water repelling property of assessment warm mix modifying asphalt.Further, utilize rolling shaping mechanism for standard compliant rut test piece, the test specimen prepared is placed in the Measuring Device with Water Tank with Temp.-controlled, rut test piece is immersed in the water of high temperature completely.The ability of permanentset is resisted in this experiment in high temperature environments in order to assess warm mix modified asphalt mixture, and examine warm mix modifying asphalt and gather materials when by antistripping ability when high temperature, water and external force, be an important indicator of reflection real road pavement life situation.List in the specific performance index of standard I-D modified asphalt mixture and the warm mix modified asphalt mixture corresponding with preparation example 10 table 7 below.
Table 7
As can be seen from Table 7, warm mix modified asphalt mixture of the present invention declines 20 DEG C relative to the mix temperature of standard I-D modified asphalt mixture and compacting temperature, and bulk density slightly declines, and corresponding porosity rises to some extent.Remaining stability after placing 24h in marshal piece 60 DEG C of water of warm mix modified asphalt mixture of the present invention is 92.19%, basically identical with standard I-D modified asphalt mixture, illustrates that warm mix modified asphalt mixture of the present invention has good water resisting property.Rut test piece tests dynamic stability in 60 DEG C of water, observes under the environment of water and pressure simultaneously, pitch and the peeling conditions gathered materials.As a result, about the dynamic stability in water, warm mix modified asphalt mixture comparison with standard I-D modified asphalt mixture of the present invention decreases, but both peeling phenomenon does not occur, and illustrates that warm mix modifying asphalt of the present invention has good resistance to flaking.
Above index all meets code requirement, describes warm mix modifying asphalt of the present invention and possesses excellent over-all properties, can meet the design requirement of pavement of road under various complex environment.
Claims (9)
1. a pre-prepared warm mix modifying asphalt, it is characterized in that comprising the stablizer of the matrix pitch of 100 weight parts, the polymer modifiers of 2 ~ 10 weight parts, the strengthening agent of 0 ~ 6 weight part, the Rheology Promotors of 1 ~ 4 weight part, the tensio-active agent of 0.1 ~ 2 weight part, the emulsion whipping agent of 0.5 ~ 2 weight part and 0.05 ~ 0.5 weight part
Wherein, Rheology Promotors is the melt blended material of polyethylene wax and nucleator, and the amount of nucleator is the 0.05wt% ~ 0.5wt% of the amount of polyethylene wax.
2. pre-prepared warm mix modifying asphalt according to claim 1, is characterized in that matrix pitch is general road petroleum pitch.
3. pre-prepared warm mix modifying asphalt according to claim 1, is characterized in that polymer modifiers comprises at least one in styrene-butadiene-styrene block copolymer, polyethylene, polypropylene, nylon, polyvinyl chloride, ethylene-methyl acrylate copolymer, ethylene-propylene rubber(EPR), ethylene-vinyl acetate copolymer, natural rubber, polyhutadiene, polyisoprene, isoprene-isobutylene rubber, styrene butadiene rubbers, neoprene latex and waste tire rubber powder.
4. pre-prepared warm mix modifying asphalt according to claim 1, is characterized in that strengthening agent is rock asphalt.
5. pre-prepared warm mix modifying asphalt according to claim 1, is characterized in that nucleator is at least one in calcium stearate, Zinic stearas, stearic acid and 1,3:2,4-dibenzal sorbitol.
6. pre-prepared warm mix modifying asphalt according to claim 1, it is characterized in that tensio-active agent is the combination of cats product or cats product and nonionogenic tenside, cats product comprises Trimethyllaurylammonium bromide, cetyl trimethylammonium bromide, at least one in Dodecyl trimethyl ammonium chloride, nonionogenic tenside comprises alkylphenol polyoxyethylene, high-carbon fatty alcohol polyoxyethylene ether, polyoxyethylene carboxylate, polyoxyethylene amine, polyoxyethylate amide, the ethylene oxide adduct of polypropylene glycol, at least one in sorbitan ester.
7. pre-prepared warm mix modifying asphalt according to claim 1, is characterized in that emulsion whipping agent is at least one in organosilicon-modified acrylate emulsion and organosilicon modified styrene-acrylate copolymer emulsion.
8. pre-prepared warm mix modifying asphalt according to claim 1, is characterized in that stablizer is at least one in elemental sulfur and sulfur donor.
9. prepare a method for pre-prepared warm mix modifying asphalt, it is characterized in that comprising:
The strengthening agent of the matrix pitch of 100 weight parts of molten state and 0 ~ 6 weight part, the polymer modifiers of 2 ~ 10 weight parts, the Rheology Promotors of 1 ~ 4 weight part, the tensio-active agent of 0.1 ~ 2 weight part, the stablizer of 0.05 ~ 0.5 weight part, the emulsion whipping agent of 0.5 ~ 2 weight part are mixed
Wherein, Rheology Promotors is the melt blended material of polyethylene wax and nucleator, and the amount of nucleator is the 0.05wt% ~ 0.5wt% of the amount of polyethylene wax.
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| CN104312175B (en) * | 2014-10-16 | 2016-08-17 | 盐城工学院 | A kind of asphalt modifier, modified emulsifying asphalt and modified asphalt mixture and each preparation method |
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| CN105482470A (en) * | 2015-12-26 | 2016-04-13 | 廖鹏程 | Anti-deformation matrix asphalt and preparation technology |
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| CN107141822A (en) * | 2017-05-22 | 2017-09-08 | 江苏中路交通科学技术有限公司 | It is a kind of for novel asphalt material of pavement patching and preparation method thereof |
| CN107311506A (en) * | 2017-07-27 | 2017-11-03 | 四川三合杰众涂装工程技术有限公司 | Asphalt paving additive, asphalt paving and impregnating agent preparation facilities |
| CN108034270B (en) | 2017-12-28 | 2019-11-22 | 华南理工大学 | A kind of modified pitch and preparation method thereof |
| CN108558272B (en) * | 2018-05-24 | 2020-10-09 | 浙江绣山园林建设有限公司 | Regenerative road cold-patch material |
| CN109294249A (en) * | 2018-09-14 | 2019-02-01 | 北京城建十六建筑工程有限责任公司 | A kind of environmental protection hot asphalt and preparation method thereof |
| CN109943086B (en) * | 2019-04-08 | 2021-07-20 | 上海道淳交通科技有限公司 | Oil-stain-resistant modified asphalt and preparation method thereof |
| CN110982290B (en) * | 2019-12-20 | 2021-08-24 | 河南交通职业技术学院 | Aged asphalt regenerant and preparation method thereof |
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| CN111704386A (en) * | 2020-07-17 | 2020-09-25 | 重庆市智翔铺道技术工程有限公司 | Smoke suppression type warm-mix modifier, warm-mix cast asphalt mixture and preparation method |
| CN111960730B (en) * | 2020-08-13 | 2021-12-31 | 中铁十五局集团第五工程有限公司 | Foamed asphalt warm-mix mixture and preparation method thereof |
| CN114044650B (en) * | 2021-10-26 | 2023-04-14 | 中国石油化工股份有限公司 | Warm-mixed asphalt mixture and preparation method thereof |
| CN116750994B (en) * | 2023-08-22 | 2023-11-03 | 马珞交通科技(江苏)有限公司 | Normal-temperature easily-compacted asphalt mixture and preparation method and construction method thereof |
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| EP2062943A1 (en) * | 2007-11-14 | 2009-05-27 | Akzo Nobel N.V. | Asphalt modifiers for "warm mix" applications including adhesion promoter |
| CN101649122B (en) * | 2009-09-10 | 2011-04-06 | 交通部公路科学研究院 | SBS modified asphalt and preparation method thereof |
| CN101974236B (en) * | 2010-11-04 | 2012-12-26 | 爱思开(北京)公路科技有限公司 | Cast asphalt composition and preparation method thereof |
| CN102093731B (en) * | 2011-03-31 | 2012-09-26 | 许昌金欧特沥青股份有限公司 | Color asphalt warm-mixing agent and preparation process thereof |
| CN103242479B (en) * | 2013-05-22 | 2015-07-29 | 南通福伦利新材料有限公司 | A kind of fluorine Si acrylate copolymer emulsion, preparation method and application |
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