CN103525100B - A kind of asphalt modifier and modifying asphalt with cold resistance energy - Google Patents
A kind of asphalt modifier and modifying asphalt with cold resistance energy Download PDFInfo
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Abstract
The present invention relates to asphalt modification technical field, be specifically related to a kind of asphalt modifier and the modifying asphalt with cold resistance energy, a kind of asphalt modifier with cold resistance energy comprises 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 bio-based filler is the filler dry powder of lignin organism and silicates inorganics composition, asphalt modifier of the present invention has and improves pitch cold resistance energy, and has independent physical index, and the performance of properties-correcting agent is easy to management and control, make independent properties-correcting agent finished product for Market Selection, improve the modification performance of pitch and handiness utilizes above-mentioned asphalt modifier, prepare modifying asphalt, have cold-resistant, cold resistance can be good, stability is high, the feature that cost is low.
Description
Technical field
The present invention relates to asphalt modification technical field, be specifically related to a kind of asphalt modifier and the modifying asphalt with cold resistance energy.
Background technology
Bituminous road is the various types of road surfaces by mixing bitumen for road use material making in mineral material.Asphaltic binder improves the ability of paving the way with pellet opposing driving and the infringement of natural cause road pavement, makes evenness of road surface, lacks dirt, waterproof, durable in use.Therefore, bituminous pavement is a kind of high class pavement be the most widely used in Road construction.But simple bituminous pavement, its high temperature anti-rut behavior is poor, and anti-cryostatic stabilization performance is bad, and therefore, since 2000 China introduce Austrian SBS modified asphalt technology, the expressway construction of 99% adopts this asphalt modification technology.Asphalt modifier is the organic or inorganic material of the natural or synthetic added in pitch or asphalt, melting or the pavement performance be dispersed in improvement or raising pitch in pitch.As the mechanical property (intensity and toughness etc.) in order to improve pitch, just adding polymkeric substance, resin, plastics, carbon black, inorganic salt etc. and gaining in strength and the material of toughness.The weather of China is complicated, and surface conditions is changeable, and especially the impact of temperature on bituminous pavement is larger.Especially time the north is cold, the lowest temperature can reach-28 °, can add up to be in for a long time under sub-zero temperature for many months, therefore the situation of road surface fracture easily occurs, brings very large impact to traffic.
Although current asphalt modifier can improve high temperature anti-rut behavior and the cryostatic stabilization performance of bituminous pavement to a certain extent, but the shortcoming of finished product asphaltum is that the kind dosage of user to matrix pitch, properties-correcting agent is ignorant, 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.The import modifying asphalt that manufacturer of foreign country processes in China is no exception, all once there was the phenomenon of emanating and exceeding standard in nearly all producer, and the underlying cause is, current asphalt modifier can only use by bound bitumen simultaneously, can not present with independent finished product, do not have concrete physical property to pass judgment on.Therefore, sell in the market be all finished product lay claim to cold resistance can finished asphalt, but the properties-correcting agent kind of its actual use and performance all unclear, therefore use and effectively for the situation of locality, blindness can not be had.
As Chinese granted patent CN102030942B, a kind of cold resistant, high-temperature-resistant composite material and preparation method thereof, disclose the matrix material be made up of 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 high temperature anti-rut behavior of bituminous pavement simultaneously.This formula materials complicated component, to actual production strong mechanical property management and control comparatively airplane crash, does not also list concrete performance management and control index and physical property to matrix material simultaneously.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, and stability is high, the feature that cost is low.
Object of the present invention is achieved through the following technical solutions:
There is an asphalt modifier for cold resistance energy, 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 of lignin organism and silicates inorganics composition.Can effectively reduce costs, anti-aging is effective.
Further, the component of following weight percent is comprised:
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 of following weight percent is comprised:
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, and be preferably 2:3, dry powder order number is 120-160 order.Effectively can 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 utilizing thing of polyethylene film class.The secondary recovery material of the discarded utilizations such as such as packing film, plastic film for agricultural use, preservative film or the low density PE made by extrusion blow technique, softening temperature is preferably greater than 90 °, elongation (-40 °/4H process) is greater than more than 300%, tensile strength (-40 °/4H) is at more than 12MPa, then obtained asphalt modifier effect is more excellent.
Wherein, described waste Crumb rubber is the tire powder that recovery junked tire obtains through grinding, can select light duty tire, also can be the recovery tire of loading and motor bus tire, the quantity of current recovery tire is very large, if effectively can not utilize these tires, large to environmental disruption.The present invention recycles junked tire, effective solution junked tire reclaim problem again, while 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 preferably made is 20 ~ 40 orders, better with the mixed effect of other materials.
Wherein, described oxidation inhibitor is one or both mixtures mixed 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, there is low toxicity, Heat stability is good, water-fast extracting is good, the hydroperoxide that can 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, have the good discoloration preventing light and heat from causing.Preferred irgasfos 168 and 1010 compound uses, its antioxygen property is better.
Wherein, described lubricant is one or more mixtures mixed in any proportion in ethylenebis stearic amide or discarded machine oil or aromatic hydrocarbon oil.Ethylenebis stearic amide is also known as N, N ' one ethylenebisstearamide, more than 80 DEG C aobvious wettabilities, stablize soda acid and water medium, nontoxic, without any side effects to human body, adjustable hot melt sails the viscosity of glutinous agent, improves liquidity, and increases hardness and light.Discarded machine oil or aromatic hydrocarbon oil as lubricant except can lubrication be played, can improve low-temperature performance and the ductility of pitch, addition can not be too many, if exceed addition simultaneously, discarded machine oil or aromatic hydrocarbon oil easily separate out material surface, and aromatic hydrocarbon oil effectively can improve the cryostatic stabilization performance of pitch.
There is a preparation method for the asphalt modifier of cold resistance energy, comprise following preparation process:
Step 1: by polyethylene, waste rubber tire powder, bio-based filler, lubricant, oxidation inhibitor and toner drop in powder cylinder successively in proportion 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 shaping.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, mold temperature is 150 ~ 200 DEG C, the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 350 ~ 500r/min; Strictly control parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightnesss, guarantee the full and uniform fusion of material, physical property is stablized, and performance is more excellent.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and carry out puddling and obtain asphalt modifier of the present invention afterwards.Crossing tank makes particle cooling be convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, is the water removing surface with device water dumping of fetching water.
There is a modifying asphalt for cold resistance energy, be made up of the component of following weight part:
Pitch: 100 parts
SBS modifier: 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, then the consistency of properties-correcting agent and pitch is unstable for addition, can cause storing instability.
Other auxiliary agents described are aromatic hydrocarbon oil.Can be used to promote the ductility of modifying asphalt, addition is too high can affect softening temperature, therefore must control in rational scope, can promote the low-temperature performance of modifying asphalt with cold-resistant properties-correcting agent acting in conjunction simultaneously.
Wherein, be prepared from by following preparation method, specifically comprise following preparation process:
Step one: aromatic hydrocarbon oil and pitch are mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: cold-resistant properties-correcting agent and SBS mixing are shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes cold-resistant properties-correcting agent and SBS modifier fully swelling;
Step 3: add stablizer, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, 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 and improves pitch 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.
3rd: the stability of asphalt modifier of the present invention is high, do not need to be prepared with modifying asphalt simultaneously, finished product packing warehouse-in can be produced into separately, sell separately.
4th: owing to having concrete physical index, for market unrestricted choice, asphalt modification targetedly can be carried out according to different demand, improve modification performance and the handiness of pitch.
5th: the raw material of employing belongs to waste and old reclaimed materials, while reducing raw materials cost, the less pollution to environment, waste reclaimation, meets environmental protection concept.
6th: compositing formula is simple, excellent performance, compared with the asphalt modifier such as more common on the market at present SBS, EVA, PE, its cost is lower, and market popularization value is strong.
Another beneficial effect of the present invention: utilize asphalt modifier of the present invention can replace the SBS modifier of 30%, the modifying asphalt that obtain composite with SBS, quality can reach I-D index in JTGF40-2004 " 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
Following preparation method is utilized 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 in powder cylinder and 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 shaping.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, and mold temperature is 150 DEG C, and the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 380r/min; Strictly control parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightnesss, guarantee the full and uniform fusion of material, physical property is stablized, and performance is more excellent.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered to mix after bucket is puddled and namely obtains asphalt modifier of the present invention.
Again according to following preparation method, prepare modifying asphalt:
Step one: the pitch of 1 part of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: the SBS modifier mixing of the cold-resistant properties-correcting agent of 1 part and 3 parts shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes cold-resistant properties-correcting agent and SBS modifier fully swelling;
Step 3: add 0.12 part of sulphur, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, 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
Following preparation method is utilized 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 in powder cylinder and 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 shaping.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, and mold temperature is 200 DEG C, and the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 450r/min; Strictly control parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightnesss, guarantee the full and uniform fusion of material, physical property is stablized, and performance is more excellent.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and carry out puddling rear obtained asphalt modifier of the present invention.Crossing tank makes particle cooling be convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, is the water removing surface with device water dumping of fetching water.
Again according to following preparation method, prepare modifying asphalt:
Step one: the pitch of 1.5 parts of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: the SBS modifier mixing of the cold-resistant properties-correcting agent of 1.5 parts and 3 parts shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes cold-resistant properties-correcting agent and SBS modifier fully swelling;
Step 3: add 0.15 part of sulphur, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, 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
Following preparation method is utilized to prepare asphalt modifier:
Step 1: by 12 parts of polyethylene, 65 parts of waste rubber tire powder, 13 parts of bio-based fillers, the mixture of 2.2 parts of ethylenebis stearic amides, 7 parts of discarded machine oil and 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 in powder cylinder and 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 shaping.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, and mold temperature is 180 DEG C, and the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 350r/min; Strictly control parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightnesss, guarantee the full and uniform fusion of material, physical property is stablized, and performance is more excellent.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and carry out puddling rear obtained asphalt modifier of the present invention.Crossing tank makes particle cooling be convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, is the water removing surface with device water dumping of fetching water.
Again according to following preparation method, prepare modifying asphalt:
Step one: mixed thoroughly by the pitch of 100 parts, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: the SBS modifier mixing of the cold-resistant properties-correcting agent of 2 parts and 2.5 parts shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes cold-resistant properties-correcting agent and SBS modifier fully swelling;
Step 3: add 0.2 part of sulphur, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, 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
Following preparation method is utilized to prepare asphalt modifier:
Step 1: by 17 parts of polyethylene, 62 parts of waste rubber tire powder, 15 parts of bio-based fillers, the mixture of 1 part of ethylenebis stearic amide, 4 parts of discarded machine oil and 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 in powder cylinder and 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 shaping.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, and mold temperature is 160 DEG C, and the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 400r/min; Strictly control parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightnesss, guarantee the full and uniform fusion of material, physical property is stablized, and performance is more excellent.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and puddle, obtain asphalt modifier of the present invention.Crossing tank makes particle cooling be convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, is the water removing surface with device water dumping of fetching water.
Again according to following preparation method, prepare modifying asphalt:
Step one: the pitch of 2 parts of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: the SBS modifier mixing of the cold-resistant properties-correcting agent of 1 part and 3.5 parts shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes cold-resistant properties-correcting agent and SBS modifier fully swelling;
Step 3: add 0.1 part of sulphur, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, 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
Following preparation method is utilized 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 in powder cylinder and 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 shaping.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, and mold temperature is 200 DEG C, and the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 500r/min; Strictly control parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightnesss, guarantee the full and uniform fusion of material, physical property is stablized, and performance is more excellent.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and carry out puddling rear obtained asphalt modifier of the present invention.Crossing tank makes particle cooling be convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, is the water removing surface with device water dumping of fetching water.
Again according to following preparation method, prepare modifying asphalt:
Step one: the pitch of 1.5 parts of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: the SBS modifier mixing of the cold-resistant properties-correcting agent of 2 parts and 2.5 parts shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes cold-resistant properties-correcting agent and SBS modifier fully swelling;
Step 3: add 0.08 part of sulphur, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, 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
Following preparation method is utilized 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 in powder cylinder and 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 shaping.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, and mold temperature is 180 DEG C, and the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 450r/min; Strictly control parameters such as the temperature of each course of processing in product preparation process, rotating speed and vacuum tightnesss, guarantee the full and uniform fusion of material, physical property is stablized, and performance is more excellent.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and carry out puddling rear obtained asphalt modifier of the present invention.Crossing tank makes particle cooling be convenient to dicing machine pelletizing, because through tank, material strip surface is moisture, is the water removing surface with device water dumping of fetching water.
Again according to following preparation method, prepare modifying asphalt:
Step one: the pitch of 1.5 parts of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: the SBS modifier mixing of the cold-resistant properties-correcting agent of 1.5 parts and 3 parts shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes cold-resistant properties-correcting agent and SBS modifier fully swelling;
Step 3: add 0.12 part of sulphur, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, 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
Here is comparative example of the present invention, prepares asphalt modifier by following preparation method:
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 in powder cylinder and carry out uniform stirring, churning time is 5min, and stirring velocity is 800r/min.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, and mold temperature is 180 DEG C, and the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 450r/min.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and puddle, obtain asphalt modifier.
Comparative example 2
Here is comparative example of the present invention, utilizes 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 in powder cylinder and carry out uniform stirring, churning time is 2min, and stirring velocity is 600r/min.
Step 2: material step 1 stirred forms homogeneous melt by the process such as plasticizing, shearing, melting of twin screw extruder, and mold temperature is 180 DEG C, and the vacuum tightness that extruding pelletization adds man-hour is-0.08 ~-0.04MPa, and screw speed is 450r/min.
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and carry out puddling rear obtained asphalt modifier.
Comparative example 3
Here is comparative example of the present invention, utilizes following preparation method to prepare modifying asphalt:
Step one: the pitch of 1 part of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: 6 parts of SBS modifier mixing shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes SBS modifier fully swelling;
Step 3: add 0.2 part of sulphur, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares comparative example modifying asphalt.
Comparative example 4
Here is comparative example of the present invention, utilizes following preparation method to prepare modifying asphalt:
Step one: the pitch of 1 part of aromatic hydrocarbon oil and 100 parts is mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually.
Step 2: 4.5 parts of SBS modifier mixing shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at about 185 DEG C, makes SBS modifier fully swelling;
Step 3: add 0.15 part of sulphur, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours.
Step 4: pitch is grown: it is 180 DEG C that temperature controls, adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares comparative example modifying asphalt.
One, prepare asphalt modifier to above-mentioned 6 embodiments and comparative example 1,2 and carry out performance test, the data that detection obtains are 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 DEG C/4H) | 7.89 | 8.51 | 8.04 | 8.71 | 8.01 | 8.74 | 7.89 | 8.01 |
| Elongation (-40 DEG C/4H) | 350.71 | 321.44 | 354.74 | 335.78 | 387.45 | 385.23 | 250.71 | 387.6 |
| Softening temperature (DEG C) | 68.7 | 68.8 | 65.3 | 65.8 | 63.4 | 65.6 | 54.6 | 63.4 |
| Segregation experiment (DEG C) | 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, provides concrete performance perameter respectively to its proportion, melting means, tensile strength, elongation, softening temperature and segregation stability etc., can to its application have clearly user to; In addition, by the contrast to comparative example, show that the present invention with the addition of bio-based filler, its softening temperature of effective raising and elongation, namely the high temperature resistant property of this asphalt modifier and cold resistance can be made to be optimized, but the amount of bio-based filler can not be excessive, can affect its stability.
Two, prepare modifying asphalt to above-mentioned 6 embodiments and comparative example 3,4 and carry out performance test, the data that detection obtains are 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 (DEG C) | 78.7 | 74.7 | 75.4 | 80.4 | 78.7 | 78.7 | 58.7 | 77.9 |
| Penetration degree, 25 DEG C (0.1mm) | 50.2 | 57.5 | 56.1 | 51.3 | 54.4 | 54.4 | 58.4 | 53.4 |
| Ductility, 5 DEG C (cm) | 25.2 | 25.4 | 24.2 | 26.5 | 25.5 | 25.4 | 25.1 | 24 |
| Viscosity, 135 DEG C (Pa.S) | 2..014 | 1.807 | 1.814 | 1.951 | 1.898 | 1.898 | 1.838 | 1.842 |
| Segregation experiment (DEG C) | 1.1 | 1.2 | 0.9 | 0.5 | 0.8 | 0.8 | 1.2 | 1.4 |
| Ductility after TFOT, 5 DEG C (cm) | 19.2 | 19.1 | 18.6 | 19.8 | 18.7 | 18.7 | 18.4 | 18.4 |
As can be seen from Table 2, better, when not using asphalt modifier of the present invention, SBS consumption addition is high, just can reach good performance for the stability of modifying asphalt of the present invention and low-temperature performance, thus greatly improves the cost of SBS modifying asphalt.And when not adding asphalt modifier of the present invention, the modifying asphalt softening temperature adopting 2.5%SBS addition to obtain is low, be difficult to apply.And utilizing properties-correcting agent of the present invention and the composite use of SBS, the modifying asphalt prepared has 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, strengthen its cold resistance energy further, 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 done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (9)
1. there is a modifying asphalt for cold resistance energy, it is characterized in that: be made up of the component of following weight part:
Pitch: 100 parts
SBS modifier: 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 stablizer is sulphur or oxidation diisopropylbenzene(DIPB), and other auxiliary agents described are aromatic hydrocarbon oil;
Wherein, described cold-resistant properties-correcting agent comprises 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 bio-based filler is the filler dry powder of lignin organism and silicates inorganics composition.
2. a kind of modifying asphalt with cold resistance energy according to claim 1, is characterized in that: described cold-resistant properties-correcting agent comprises the component of 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. a kind of modifying asphalt with cold resistance energy according to claim 1, is characterized in that: described cold-resistant properties-correcting agent comprises the component of 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. a kind of modifying asphalt with cold resistance energy according to 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. a kind of modifying asphalt with cold resistance energy according to claim 1, 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. a kind of modifying asphalt with cold resistance energy according to claim 1, it is characterized in that: described polyethylene is low density PE, described polyethylene is the discarded secondary recovery material utilizing thing of polyethylene film class, described waste Crumb rubber is the tire powder that recovery junked tire obtains through grinding, and order number is 20 ~ 40 orders.
7. a kind of modifying asphalt with cold resistance energy according to claim 1, it is characterized in that: described oxidation inhibitor is tricresyl phosphite (2,4-di-tert-butyl) one or both mixtures mixed 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 mixed in any proportion in ethylenebis stearic amide or discarded machine oil or aromatic hydrocarbon oil.
8. a kind of modifying asphalt with cold resistance energy according to any one of claim 1-7, is characterized in that: described cold-resistant properties-correcting agent is prepared from by following preparation method, specifically comprises following preparation process:
Step 1: by polyethylene, waste Crumb rubber, bio-based filler, lubricant, oxidation inhibitor and toner drop in powder cylinder successively in proportion and carry out uniform stirring, and churning time is 2 ~ 10min, and stirring velocity is 600 ~ 1000r/min;
Step 2: material step 1 stirred forms homogeneous melt by the plasticizing of twin screw extruder, shearing, melting process, and mold temperature is 150 ~ 200 DEG C, and extruding the vacuum tightness adding man-hour is-0.08 ~-0.04MPa, and screw speed is 350 ~ 500r/min;
Step 3: dried up by tank immersion cooling, device water dumping of fetching water, blower successively by the material strip of extruding dies by step 2 melt, the sub-pelletizing of pelletizing, is entered and mixes bucket and carry out puddling rear obtained asphalt modifier.
9. a kind of modifying asphalt with cold resistance energy according to claim 8, is characterized in that: be prepared from by following preparation method, specifically comprises following preparation process:
Step one: aromatic hydrocarbon oil and pitch are mixed thoroughly, by 200 ~ 300rpm stirring at low speed, is warming up to 180 ~ 190 DEG C gradually;
Step 2: cold-resistant properties-correcting agent and SBS modifier mixing are shaken up, join in the pitch of heating, adopt 200 ~ 300rpm stirring at low speed, 30 ~ 40min, temperature controls at 185 DEG C, makes cold-resistant properties-correcting agent and SBS modifier fully swelling;
Step 3: add stablizer, after 200 ~ 300rpm stirring at low speed, 5 ~ 10min, then shear with emulsification shears, velocity of shear is 3000 ~ 4000rpm, and shear time is 1.5 hours;
Step 4: pitch is grown: it is 180 DEG C that temperature controls, adopts 200 ~ 300rpm stirring at low speed 1 ~ 2 hour, prepares modifying asphalt.
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