CN103525100A - Asphalt modifier with low-temperature resistance and modified asphalt - Google Patents
Asphalt modifier with low-temperature resistance and modified asphalt Download PDFInfo
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- CN103525100A CN103525100A CN201310388313.4A CN201310388313A CN103525100A CN 103525100 A CN103525100 A CN 103525100A CN 201310388313 A CN201310388313 A CN 201310388313A CN 103525100 A CN103525100 A CN 103525100A
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Abstract
The invention relates to the technical field of asphalt modification and in particular relates to an asphalt modifier with low-temperature resistance and modified asphalt. The asphalt modifier with low-temperature resistance comprises the following components in percentage by weight: 10-40 percent of polyethylene, 45-75 percent of waste rubber powder, 10-30 percent of biological base filler, 0.1-0.6 percent of antioxidant, 3.4-9.2 percent of lubricating agent and the balance of toner, wherein the biological base filler is dried filler powder consisting of lignin organic matters and silicate inorganic matters. The asphalt modifier has the capacity of improving the low-temperature resistance of asphalt and has independent physical indexes, the performance of the modifier is easily controlled, a single modifier finished product is prepared for market selection, the modification performance of the asphalt is improved, and the asphalt modifier is flexibly utilized; the prepared modified asphalt has the characteristics of cold resistance, high low-temperature resistance, high stability and low cost.
Description
Technical field
The present invention relates to asphalt modification technical field, be specifically related to a kind of asphalt modifier and modifying asphalt with cold resistance energy.
Background technology
Bituminous road is by mix various types of road surfaces of bitumen for road use material making in mineral material.Asphaltic binder has improved the ability of paving the way with pellet opposing driving and the infringement of natural cause road pavement, makes evenness of road surface, few dirt, waterproof, durable in use.Therefore, bituminous pavement is a kind of high class pavement by the most extensively adopting in Road construction.But simple bituminous pavement, the anti-rut poor performance of its high temperature, anti-cryostatic stabilization performance is bad, and therefore, since 2000 China introduce Austrian SBS modified asphalt technology, 99% expressway construction adopts this asphalt modification technology.Asphalt modifier is the organic or inorganic material of the natural or synthetic that adds in pitch or asphalt, melting or be dispersed in pitch to improve or to improve the pavement performance of pitch.As in order to improve the mechanical property (intensity and toughness etc.) of pitch, just add polymkeric substance, resin, plastics, carbon black, inorganic salt etc. to gain in strength and the material of toughness.The weather of China is complicated, and road surface situation is changeable, and especially temperature is larger on the impact of bituminous pavement.When especially the north is cold, the lowest temperature can reach-28 °, can add up to be in for a long time for many months under sub-zero temperature, and therefore the situation of road surface fracture easily occurs, and to traffic, brings very large impact.
Although current asphalt modifier can improve the anti-rut performance of the high temperature of bituminous pavement and cryostatic stabilization performance to a certain extent, but it is ignorant to the kind dosage of matrix pitch, properties-correcting agent that the shortcoming of finished product asphaltum is user, and especially the segregation problem of finished product asphaltum has suitable risk.User and modifying asphalt producer are usually quality problems generation dispute over several years, are all segregation problem substantially.Manufacturer of foreign country is no exception at the import modifying asphalt of China's processing, the phenomenon that nearly all producer all once had segregation to exceed standard, the underlying cause is that current asphalt modifier can only be used by bound bitumen simultaneously, can not present with independent finished product, do not have concrete physical property to pass judgment on.Therefore, what sell in the market is all the finished product pitch that lays claim to cold resistance energy of finished product, but the properties-correcting agent kind of its actual use and performance are all unclear, therefore use and can not, effectively for local situation, have blindness.
As Chinese granted patent CN102030942B, a kind of cold resistant, high-temperature-resistant composite material and preparation method thereof, disclose the matrix material of being made by the raw material of following weight part: polyethylene 20-30; Polyvinyl butyral resin 5-10; SBS:10-15; Diatomite 10-20; EVA5-10; ABS10-15; SMN resin 20-25; JC-G530C toughener 5-10; Lignocellulose 0.3-0.5; The 15-25 % by weight of the above material summation of nano-calcium carbonate, this matrix material not only solves the stability of China's monsoon climate of medium latitudes region Pavement Low, also efficiently solves the anti-rut performance of high temperature of bituminous pavement simultaneously.This formula materials complicated component, to comparatively airplane crash of actual production material property stability management and control, does not list concrete performance management and control index and physical property to matrix material simultaneously yet.And what adopt is substantially all virgin material, and product cost is high, and market popularization value is low.
Summary of the invention
The object of the invention is for deficiency of the prior art, a kind of asphalt modifier with cold resistance energy is provided, it has can improve pitch cold resistance energy, and there is independent physical index, the performance of properties-correcting agent is easy to management and control, make independent properties-correcting agent finished product for Market Selection, improve modification performance and the handiness of pitch.
Another goal of the invention of the present invention be to provide a kind of have cold resistance can modifying asphalt, it has cold-resistant, cold resistance can be good, stability is high, the feature that cost is low.
Object of the present invention is achieved through the following technical solutions:
Have cold resistance can an asphalt modifier, comprise the component of following weight percent:
Polyethylene: 10 ~ 40%
Waste Crumb rubber: 45 ~ 75%
Bio-based filler: 10 ~ 30%
Oxidation inhibitor: 0.1 ~ 0.6%
Lubricant: 3.4 ~ 9.2%
Surplus is toner;
Wherein, described polyethylene is low density PE, and described bio-based filler is the filler dry powder that lignin organism and silicates inorganics form.Can effectively reduce costs, anti-aging is effective.
Further, the component that comprises following weight percent:
Polyethylene: 15 ~ 30%
Waste Crumb rubber: 50 ~ 70%
Bio-based filler: 10 ~ 25%
Oxidation inhibitor: 0.2 ~ 0.4%
Lubricant: 5 ~ 8%
Surplus is toner.
Further, the component that comprises following weight percent:
Polyethylene: 15 ~ 20%
Waste Crumb rubber: 52 ~ 67%
Bio-based filler: 10 ~ 15%
Oxidation inhibitor: 0.2 ~ 0.4%
Lubricant: 5 ~ 7%
Surplus is toner.
Wherein, described lignin organism is the extract of black liquid, and the potential of hydrogen of described bio-based is PH7.0-7.5.
Wherein, the lignin organism in described bio-based filler and the weight ratio of silicates inorganics are 1-2.5:3-5, are preferably 2:3, and dry powder order number is 120-160 order.Can effectively improve mechanical property and the thermal characteristics of waste Crumb rubber, and lignin organism is wherein the extract in black liquid, energy-conserving and environment-protective.
Wherein, described polyethylene is the discarded secondary recovery material that utilizes thing of polyethylene film class.The secondary recovery material of discarded utilizations such as packing film, plastic film for agricultural use, preservative film or the low density PE of making by extrusion blow technique, softening temperature is preferably greater than 90 °, elongation (40 °/4H processing) is greater than more than 300%, tensile strength (40 °/4H) is more than 12MPa, and the asphalt modifier effect making is more excellent.
Wherein, the tire powder that described waste Crumb rubber obtains through grinding for reclaiming junked tire, can select light-duty loading tire, also can be the recovery tire of loading and motor bus tire, the quantity that reclaims at present tire is very large, if can not these tires effectively be utilized, large to environmental disruption.The present invention recycles junked tire, effectively solve the problem that reclaims again of junked tire, when solving environmental problem, and turned waste into wealth, make Powdered for the production of asphalt modifier of the present invention, greatly reduce the material cost of properties-correcting agent, not only there is great Significance for Environment, and there is great social effect and economic implications.The powdery order number of preferably making is 20 ~ 40 orders, better with the mixed effect of other materials.
Wherein, described oxidation inhibitor is one or both mixtures that mix in any proportion in tricresyl phosphite (2,4-di-tert-butyl) ester or four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester.Tricresyl phosphite (2,4-di-tert-butyl) ester is commonly called as irgasfos 168, and chemical name is three (2,4-di-tert-butyl-phenyl) phosphorous acid ester, has low toxicity, Heat stability is good, water-fast extracting is good, the hydroperoxide that effectively produce in decomposing copolymer heat-processed.Four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester is commonly called as antioxidant 1010, is a kind of polynary hindered phenol type antioxidant, has good consistency with most polymers, has the good discoloration that light and heat causes that prevents.Preferred irgasfos 168 and 1010 compound uses, its antioxygen property is better.
Wherein, described lubricant is one or more mixtures that mix in any proportion in ethylenebis stearic amide or discarded machine oil or aromatic hydrocarbon oil.Ethylenebis stearic amide claims again N, a N ' ethylenebisstearamide, and 80 ℃ of above aobvious wettabilities, stable, nontoxic to soda acid and water medium, without any side effects to human body, adjustable hot melt is sailed the viscosity of glutinous agent, improves liquidity, and increases hardness and light.Discarded machine oil or aromatic hydrocarbon oil as lubricant except playing lubrication, low-temperature performance and the ductility that can improve pitch simultaneously, addition can not be too many, if surpass addition, discarded machine oil or aromatic hydrocarbon oil are easily separated out material surface, and aromatic hydrocarbon oil can effectively improve the cryostatic stabilization performance of pitch.
A preparation method for the asphalt modifier of cold resistance energy, comprises following preparation process:
Step 1: by polyethylene, waste rubber tire powder, bio-based filler, lubricant, oxidation inhibitor and toner drop into successively in proportion in powder cylinder and carry out uniform stirring, and churning time is 2 ~ 10min, and stirring velocity is 600 ~ 1000r/min; Be conducive to fully mixing of material, be conducive to following process moulding.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, mold temperature is 150 ~ 200 ℃, the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 350 ~ 500r/min; The parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightness are strictly controlled, guaranteed the full and uniform fusion of material, physical property is stable, and performance is more excellent.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters to mix after bucket is puddled and makes asphalt modifier of the present invention.Cross tank and make that particle is cooling is convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, with fetching water, device water dumping is to remove surperficial water.
Have cold resistance can a modifying asphalt, by the component of following weight part, formed:
Pitch: 100 parts
SBS properties-correcting agent: 2.5 ~ 4.5 parts
Cold-resistant properties-correcting agent: 1 ~ 2 part
Stablizer: 0.05 ~ 0.25 part
Other auxiliary agents: 0 ~ 2 part,
Wherein, described cold-resistant properties-correcting agent is a kind of asphalt modifier with cold resistance energy of the present invention, and described stablizer is sulphur or oxidation diisopropylbenzene(DIPB), and sulphur performance is good, and the charge is small, and cost performance is high.Stablizer addition is too many, and modifying asphalt is failure easily, occurs gel etc.Very little, the consistency of properties-correcting agent and pitch is unstable for addition, can cause storing unstable.
Described other auxiliary agents are aromatic hydrocarbon oil.Can be used to promote the ductility of modifying asphalt, addition is too high can affect softening temperature, therefore must be controlled in rational scope, can promote with cold-resistant properties-correcting agent acting in conjunction the low-temperature performance of modifying asphalt simultaneously.
Wherein, by following preparation method, be prepared from, specifically comprise following preparation process:
Step 1: aromatic hydrocarbon oil and pitch are mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: will resist cold properties-correcting agent and SBS mixing shake up, and join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, and temperature is controlled at 185 ℃ of left and right, makes cold-resistant properties-correcting agent and the abundant swelling of SBS properties-correcting agent;
Step 3: add stablizer, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt.
Beneficial effect of the present invention:
First: asphalt modifier of the present invention has the pitch of improvement cold resistance energy, can be applied in asphalt modification technology.
Second: asphalt modifier of the present invention has independent physical index, the performance of properties-correcting agent is easy to management and control.
The the 3rd: the stability of asphalt modifier of the present invention is high, do not need to be prepared with modifying asphalt simultaneously, can be produced into separately finished product packing warehouse-in, sell separately.
The the 4th: owing to thering is concrete physical index, can freely select for market, according to different demands, carry out asphalt modification targetedly, improve modification performance and the handiness of pitch.
The the 5th: the raw material of employing belongs to waste and old reclaimed materials, when reducing raw materials cost, the less pollution to environment, waste reclaimation, meets environmental protection concept.
The the 6th: compositing formula is simple, excellent performance, with at present on the market the asphalt modifier such as more common SBS, EVA, PE compare, its cost is lower, market popularization value is strong.
Another beneficial effect of the present invention: utilize asphalt modifier of the present invention can replace 30% SBS properties-correcting agent, with the composite modifying asphalt obtaining of SBS, quality can reach I-D index in JTG F40-2004 " standard specification for construction and acceptance of highway asphalt pavement ", cold tolerance is good, and cost can reduce 30-50 yuan/ton, there is larger market popularization value.
Embodiment
The invention will be further described with the following Examples.
Embodiment 1
Utilize following preparation method to prepare asphalt modifier:
Step 1: by 40 parts of polyethylene, 45 parts of waste rubber tire powder, 11 parts of bio-based fillers, 0.1 part of ethylenebis stearic amide, 0.4 part of aromatic hydrocarbon, 0.1 part of tricresyl phosphite (2,4-di-tert-butyl) ester, 0.1 part of four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.4 part of toner drop into successively and in powder cylinder, carry out uniform stirring, churning time is 3min, and stirring velocity is 700r/min; Be conducive to fully mixing of material, be conducive to following process moulding.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, and mold temperature is 150 ℃, and the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 380r/min; The parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightness are strictly controlled, guaranteed the full and uniform fusion of material, physical property is stable, and performance is more excellent.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters to mix after bucket is puddled and obtains asphalt modifier of the present invention.
According to following preparation method, prepare modifying asphalt again:
Step 1: the pitch of 1 part of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: the SBS properties-correcting agent of the cold-resistant properties-correcting agent of 1 part and 3 parts is mixed and shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature is controlled at 185 ℃ of left and right, makes cold-resistant properties-correcting agent and the abundant swelling of SBS properties-correcting agent;
Step 3: add 0.12 part of sulphur, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt of the present invention.
Wherein, described in step 2, cold-resistant properties-correcting agent is asphalt modifier of the present invention.
Embodiment 2
Utilize following preparation method to prepare asphalt modifier:
Step 1: by 10 parts of polyethylene, 75 parts of waste rubber tire powder, 10 parts of bio-based fillers, 1.4 parts of ethylenebis stearic amides, 3 parts of discarded machine oil, 0.1 part of tricresyl phosphite (2,4-di-tert-butyl) ester, 0.2 part of four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.3 part of toner drop into successively and in powder cylinder, carry out uniform stirring, churning time is 5min, and stirring velocity is 1000r/min; Be conducive to fully mixing of material, be conducive to following process moulding.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, and mold temperature is 200 ℃, and the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 450r/min; The parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightness are strictly controlled, guaranteed the full and uniform fusion of material, physical property is stable, and performance is more excellent.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters to mix after bucket is puddled and makes asphalt modifier of the present invention.Cross tank and make that particle is cooling is convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, with fetching water, device water dumping is to remove surperficial water.
According to following preparation method, prepare modifying asphalt again:
Step 1: the pitch of 1.5 parts of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: the SBS properties-correcting agent of the cold-resistant properties-correcting agent of 1.5 parts and 3 parts is mixed and shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature is controlled at 185 ℃ of left and right, makes cold-resistant properties-correcting agent and the abundant swelling of SBS properties-correcting agent;
Step 3: add 0.15 part of sulphur, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt of the present invention.
Wherein, described in step 2, cold-resistant properties-correcting agent is asphalt modifier of the present invention.
Embodiment 3
Utilize following preparation method to prepare asphalt modifier:
Step 1: by 12 parts of polyethylene, 65 parts of waste rubber tire powder, 13 parts of bio-based fillers, 2.2 parts of ethylenebis stearic amides, 7 parts of discarded machine oil and the mixture of aromatic hydrocarbon, 0.3 part of tricresyl phosphite (2,4-di-tert-butyl) ester, 0.2 part of four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.3 part of toner drop into successively and in powder cylinder, carry out uniform stirring, churning time is 7min, and stirring velocity is 600r/min; Be conducive to fully mixing of material, be conducive to following process moulding.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, and mold temperature is 180 ℃, and the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 350r/min; The parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightness are strictly controlled, guaranteed the full and uniform fusion of material, physical property is stable, and performance is more excellent.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters to mix after bucket is puddled and makes asphalt modifier of the present invention.Cross tank and make that particle is cooling is convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, with fetching water, device water dumping is to remove surperficial water.
According to following preparation method, prepare modifying asphalt again:
Step 1: the pitch of 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: the SBS properties-correcting agent of the cold-resistant properties-correcting agent of 2 parts and 2.5 parts is mixed and shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature is controlled at 185 ℃ of left and right, makes cold-resistant properties-correcting agent and the abundant swelling of SBS properties-correcting agent;
Step 3: add 0.2 part of sulphur, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt of the present invention.
Wherein, described in step 2, cold-resistant properties-correcting agent is asphalt modifier of the present invention.
Embodiment 4
Utilize following preparation method to prepare asphalt modifier:
Step 1: by 17 parts of polyethylene, 62 parts of waste rubber tire powder, 15 parts of bio-based fillers, 1 part of ethylenebis stearic amide, 4 parts of discarded machine oil and the mixture of aromatic hydrocarbon, 0.2 part of tricresyl phosphite (2,4-di-tert-butyl) ester, 0.2 part of four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.6 part of toner drop into successively and in powder cylinder, carry out uniform stirring, churning time is 8min, and stirring velocity is 900r/min; Be conducive to fully mixing of material, be conducive to following process moulding.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, and mold temperature is 160 ℃, and the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 400r/min; The parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightness are strictly controlled, guaranteed the full and uniform fusion of material, physical property is stable, and performance is more excellent.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters and mixes bucket and puddle, and makes asphalt modifier of the present invention.Cross tank and make that particle is cooling is convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, with fetching water, device water dumping is to remove surperficial water.
According to following preparation method, prepare modifying asphalt again:
Step 1: the pitch of 2 parts of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: the SBS properties-correcting agent of the cold-resistant properties-correcting agent of 1 part and 3.5 parts is mixed and shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature is controlled at 185 ℃ of left and right, makes cold-resistant properties-correcting agent and the abundant swelling of SBS properties-correcting agent;
Step 3: add 0.1 part of sulphur, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt of the present invention.
Wherein, described in step 2, cold-resistant properties-correcting agent is asphalt modifier of the present invention.
Embodiment 5
Utilize following preparation method to prepare asphalt modifier:
Step 1: by 14 parts of polyethylene, 52 parts of waste rubber tire powder, 25 parts of bio-based fillers, 1 part of ethylenebis stearic amide, 7 parts of discarded machine oil, 0.1 part of tricresyl phosphite (2,4-di-tert-butyl) ester, 0.2 part of four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.7 part of toner drop into successively and in powder cylinder, carry out uniform stirring, churning time is 10min, and stirring velocity is 1000r/min; Be conducive to fully mixing of material, be conducive to following process moulding.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, and mold temperature is 200 ℃, and the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 500r/min; The parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightness are strictly controlled, guaranteed the full and uniform fusion of material, physical property is stable, and performance is more excellent.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters to mix after bucket is puddled and makes asphalt modifier of the present invention.Cross tank and make that particle is cooling is convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, with fetching water, device water dumping is to remove surperficial water.
According to following preparation method, prepare modifying asphalt again:
Step 1: the pitch of 1.5 parts of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: the SBS properties-correcting agent of the cold-resistant properties-correcting agent of 2 parts and 2.5 parts is mixed and shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature is controlled at 185 ℃ of left and right, makes cold-resistant properties-correcting agent and the abundant swelling of SBS properties-correcting agent;
Step 3: add 0.08 part of sulphur, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt of the present invention.
Wherein, described in step 2, cold-resistant properties-correcting agent is asphalt modifier of the present invention.
Embodiment 6
Utilize following preparation method to prepare asphalt modifier:
Step 1: by 20 parts of polyethylene, 55 parts of waste rubber tire powder, 18 parts of bio-based fillers, 2 parts of ethylenebis stearic amides, 4 parts of aromatic hydrocarbon, 0.3 part of tricresyl phosphite (2,4-di-tert-butyl) ester, 0.3 part of four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.4 part of toner drop into successively and in powder cylinder, carry out uniform stirring, churning time is 5min, and stirring velocity is 800r/min; Be conducive to fully mixing of material, be conducive to following process moulding.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, and mold temperature is 180 ℃, and the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 450r/min; The parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightness are strictly controlled, guaranteed the full and uniform fusion of material, physical property is stable, and performance is more excellent.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters to mix after bucket is puddled and makes asphalt modifier of the present invention.Cross tank and make that particle is cooling is convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, with fetching water, device water dumping is to remove surperficial water.
According to following preparation method, prepare modifying asphalt again:
Step 1: the pitch of 1.5 parts of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: the SBS properties-correcting agent of the cold-resistant properties-correcting agent of 1.5 parts and 3 parts is mixed and shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature is controlled at 185 ℃ of left and right, makes cold-resistant properties-correcting agent and the abundant swelling of SBS properties-correcting agent;
Step 3: add 0.12 part of sulphur, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt of the present invention.
Wherein, described in step 2, cold-resistant properties-correcting agent is asphalt modifier of the present invention.
Comparative example 1
Be comparative example of the present invention below, by following preparation method, prepare asphalt modifier:
Step 1: by 30 parts of polyethylene, 62 parts of waste rubber tire powder, 1 part of ethylenebis stearic amide, 6 parts of aromatic hydrocarbon, 0.1 part of tricresyl phosphite (2,4-di-tert-butyl) ester, 0.2 part of four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.7 part of toner drop into successively and in powder cylinder, carry out uniform stirring, churning time is 5min, and stirring velocity is 800r/min.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, and mold temperature is 180 ℃, and the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 450r/min.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters and mixes bucket and puddle, and makes asphalt modifier.
Comparative example 2
Be comparative example of the present invention below, utilize following preparation method to prepare asphalt modifier:
Step 1: by 20 parts of polyethylene, 37 parts of waste rubber tire powder, 18 parts of bio-based fillers, 1 part of ethylenebis stearic amide, 6 parts of aromatic hydrocarbon, 0.2 part of tricresyl phosphite (2,4-di-tert-butyl) ester, 0.2 part of four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.6 part of toner drop into successively and in powder cylinder, carry out uniform stirring, churning time is 2min, and stirring velocity is 600r/min.
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, and mold temperature is 180 ℃, and the vacuum tightness that extruding pelletization adds man-hour is-0.08～-0.04MPa, and screw speed is 450r/min.
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, the sub-pelletizing of pelletizing, enters to mix after bucket is puddled and makes asphalt modifier.
Comparative example 3
Be comparative example of the present invention below, utilize following preparation method to prepare modifying asphalt:
Step 1: the pitch of 1 part of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: 6 parts of SBS properties-correcting agent are mixed and shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature is controlled at 185 ℃ of left and right, makes the abundant swelling of SBS properties-correcting agent;
Step 3: add 0.2 part of sulphur, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares comparative example modifying asphalt.
Comparative example 4
Be comparative example of the present invention below, utilize following preparation method to prepare modifying asphalt:
Step 1: the pitch of 1 part of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃.
Step 2: 4.5 parts of SBS properties-correcting agent are mixed and shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature is controlled at 185 ℃ of left and right, makes the abundant swelling of SBS properties-correcting agent;
Step 3: add 0.15 part of sulphur, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours.
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares comparative example modifying asphalt.
One, above-mentioned 6 embodiment and comparative example 1,2 are prepared to asphalt modifier and carry out performance test, detect the data that obtain as following table 1:
| Performance index | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 1 | Comparative example 2 |
| Proportion (g/cm 3) | 1.021 | 1.044 | 1.037 | 1.052 | 1.062 | 1.054 | 1.021 | 1.062 |
| Melting index (g/10min) | 1.17 | 1.28 | 1.38 | 1.07 | 0.97 | 1.24 | 1.17 | 0.97 |
| Tensile strength (40 ℃/4H) | 7.89 | 8.51 | 8.04 | 8.71 | 8.01 | 8.74 | 7.89 | 8.01 |
| Elongation (40 ℃/4H) | 350.71 | 321.44 | 354.74 | 335.78 | 387.45 | 385.23 | 250.71 | 387.6 |
| Softening temperature (℃) | 68.7 | 68.8 | 65.3 | 65.8 | 63.4 | 65.6 | 54.6 | 63.4 |
| Segregation experiment (℃) | 1.2 | 1.3 | 0.7 | 1.1 | 1.3 | 1.2 | 1.0 | 3.4 |
As can be seen from Table 1, asphalt modifier of the present invention has independently physical index, respectively its proportion, molten finger, tensile strength, elongation, softening temperature and segregation stability etc. is provided to concrete performance perameter, can to its application have clearly user to; In addition, by the contrast to comparative example, show that the present invention has added bio-based filler, effectively improve its softening temperature and elongation, can make high temperature resistant property and the cold resistance of this asphalt modifier be optimized, but the amount of bio-based filler can not be excessive, can affect its stability.
Two, above-mentioned 6 embodiment and comparative example 3,4 are prepared to modifying asphalt and carry out performance test, detect the data that obtain as following table 2:
| Performance index | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 3 | Comparative example 4 |
| Softening temperature (℃) | 78.7 | 74.7 | 75.4 | 80.4 | 78.7 | 78.7 | 58.7 | 77.9 |
| Penetration degree, 25 ℃ (0.1mm) | 50.2 | 57.5 | 56.1 | 51.3 | 54.4 | 54.4 | 58.4 | 53.4 |
| Ductility, 5 ℃ (cm) | 25.2 | 25.4 | 24.2 | 26.5 | 25.5 | 25.4 | 25.1 | 24 |
| Viscosity, 135 ℃ (Pa.S) | 2..014 | 1.807 | 1.814 | 1.951 | 1.898 | 1.898 | 1.838 | 1.842 |
| Segregation experiment (℃) | 1.1 | 1.2 | 0.9 | 0.5 | 0.8 | 0.8 | 1.2 | 1.4 |
| Ductility after TFOT, 5 ℃ (cm) | 19.2 | 19.1 | 18.6 | 19.8 | 18.7 | 18.7 | 18.4 | 18.4 |
As can be seen from Table 2, stability and the low-temperature performance of modifying asphalt of the present invention are better, and when not using asphalt modifier of the present invention, SBS consumption addition is high, just can reach good performance, thereby greatly improve the cost of SBS modifying asphalt.And when not adding asphalt modifier of the present invention, the modifying asphalt softening temperature that adopts 2.5%SBS addition to obtain is low, be difficult to apply.And utilize properties-correcting agent of the present invention and the composite use of SBS, the modifying asphalt preparing to there is excellent performance, anti ageing property is good, the advantage that cost is low.In addition, by the reasonable compatibility with stablizer and aromatic hydrocarbon, the ductility of modifying asphalt is greatly improved, further strengthen its cold resistance energy, and storage stability is good.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although the present invention has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. an asphalt modifier with cold resistance energy, is characterized in that: the component that comprises following weight percent:
Polyethylene: 10 ~ 40%
Waste Crumb rubber: 45 ~ 75%
Bio-based filler: 10 ~ 30%
Oxidation inhibitor: 0.1 ~ 0.6%
Lubricant: 3.4 ~ 9.2%
Surplus is toner;
Wherein, described bio-based filler is the filler dry powder that lignin organism and silicates inorganics form.
According to claim 1 a kind of have cold resistance can asphalt modifier, it is characterized in that: the component that comprises following weight percent:
Polyethylene: 15 ~ 30%
Waste Crumb rubber: 50 ~ 70%
Bio-based filler: 10 ~ 25%
Oxidation inhibitor: 0.2 ~ 0.4%
Lubricant: 5 ~ 8%
Surplus is toner.
3. according to a kind of asphalt modifier with cold resistance energy of claim 1, it is characterized in that: the component that comprises following weight percent:
Polyethylene: 15 ~ 20%
Waste Crumb rubber: 52 ~ 67%
Bio-based filler: 10 ~ 15%
Oxidation inhibitor: 0.2 ~ 0.4%
Lubricant: 5 ~ 7%
Surplus is toner.
4. according to a kind of asphalt modifier with cold resistance energy of claim 1, it is characterized in that: the lignin organism in described bio-based filler is the extract of black liquid, the potential of hydrogen of described bio-based filler is PH7.0-7.5.
5. according to a kind of asphalt modifier with cold resistance energy of claim 1, it is characterized in that: the lignin organism in described bio-based filler and the weight ratio of silicates inorganics are 1-2.5:3-5, and dry powder order number is 120-160 order.
6. according to a kind of asphalt modifier with cold resistance energy of claim 1, it is characterized in that: described polyethylene is low density PE, described polyethylene is the discarded secondary recovery material that utilizes thing of polyethylene film class, the tire powder that described waste Crumb rubber obtains through grinding for reclaiming junked tire, order number is 20 ~ 40 orders.
7. according to a kind of asphalt modifier with cold resistance energy of claim 1, it is characterized in that: described oxidation inhibitor is tricresyl phosphite (2,4-di-tert-butyl) one or both mixtures that mix in any proportion in ester or four [β-(3.5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, described lubricant is one or more mixtures that mix in any proportion in ethylenebis stearic amide or discarded machine oil or aromatic hydrocarbon oil.
8. according to a kind of asphalt modifier with cold resistance energy described in claim 1-7 any one, it is characterized in that: by following preparation method, be prepared from, specifically comprise following preparation process:
Step 1: by polyethylene, waste Crumb rubber, bio-based filler, lubricant, oxidation inhibitor and toner drop into successively in proportion in powder cylinder and carry out uniform stirring, and churning time is 2 ~ 10min, and stirring velocity is 600 ~ 1000r/min;
Step 2: the processes such as the plasticizing of the material that step 1 is stirred by twin screw extruder, shearing, melting form homogeneous melt, mold temperature is 150 ~ 200 ℃, extrude that to add the vacuum tightness in man-hour be-0.08～-0.04MPa, screw speed is 350 ~ 500r/min;
Step 3: the material strip by step 2 melt by extruding dies dries up by soak cooling, the device water dumping of fetching water, blower of tank successively, and the sub-pelletizing of pelletizing, enters and mix the asphalt modifier making after bucket is puddled.
9. utilize a kind of described in claim 1 ~ 7 any one have cold resistance can asphalt modifier prepare have cold resistance can a modifying asphalt, it is characterized in that: the component by following weight part forms:
Pitch: 100 parts
SBS properties-correcting agent: 2.5 ~ 4.5 parts
Cold-resistant properties-correcting agent: 1 ~ 2 part
Stablizer: 0.05 ~ 0.25 part
Other auxiliary agents: 0 ~ 2 part,
Wherein, described cold-resistant properties-correcting agent is a kind of asphalt modifier with cold resistance energy described in claim 1-7 any one, and described stablizer is sulphur or oxidation diisopropylbenzene(DIPB), and described other auxiliary agents are aromatic hydrocarbon oil.
According to claim 9 a kind of have cold resistance can modifying asphalt, it is characterized in that: by following preparation method, be prepared from, specifically comprise following preparation process:
Step 1: aromatic hydrocarbon oil and pitch are mixed thoroughly, by 200 ~ 300rpm stirring at low speed, be warming up to gradually 180 ~ 190 ℃;
Step 2: will resist cold properties-correcting agent and the mixing of SBS properties-correcting agent shake up, and join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, and temperature is controlled at 185 ℃ of left and right, makes cold-resistant properties-correcting agent and the abundant swelling of SBS properties-correcting agent;
Step 3: add stablizer, with after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is about 1.5 hours;
Step 4: pitch is grown: it is 180 ℃ that temperature is controlled, and adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt.
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