CN101333094B - Method for preparing phase change asphalt pavement material - Google Patents
Method for preparing phase change asphalt pavement material Download PDFInfo
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- CN101333094B CN101333094B CN2008100486283A CN200810048628A CN101333094B CN 101333094 B CN101333094 B CN 101333094B CN 2008100486283 A CN2008100486283 A CN 2008100486283A CN 200810048628 A CN200810048628 A CN 200810048628A CN 101333094 B CN101333094 B CN 101333094B
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Abstract
The invention relates to a preparation method for phase-change asphalt pavement material and is characterized in that the method comprises the following steps: (1), the preparation of phase-change asphalt modifier: firstly, selecting the materials based on the mass ratio among phase change material, coagulant, support material and coupling agent which is equal to 100:1-5:10-50:1-5; secondly, adding the phase change material into the silica sol, and then adding the coagulant dropwise to form gel; drying the gel, cooling the gel to room temperature and then taking out and mashing the gel to get powder through mixing; vacuuming the powder at 30-50 DEG C for 2-4 hours, then adding the support material under the protection of shielding gas; at 80-100 DEG C, adding the coupling agent for hydrophobic modification; then granulating to get the phase-change asphalt modifier; (2), the preparation of phase-change asphalt pavement material: firstly, selecting the materials based on the mass ratio among coarse aggregate: fine aggregate: filler, asphalt, fiber and phase change asphalt modifier which is equal to 100:10-20:1-8:2-6:0.2-0.5:2-10; then stirring the materials to get the phase-change asphalt pavement material. The phase-change asphalt pavement material prepared through the invention can improve the high temperature stability of pavement surface.
Description
Technical field
The present invention relates to the preparation method of phase change asphalt pavement material.
Technical background
Bituminous concrete is a kind of viscoelastic material, and its physical and mechanical property and temperature and loading action time are closely related.Bituminous pavement stands the test from low temperature to high temperature varying environment condition during use." high temperature " condition of usually said " high-temperature stability " is meant the effect repeatedly that in use receives traffic loading, is easy to generate rut, passes, gathers around the TR of permanent deformations (also comprising bellding) such as bag.The practice that road uses shows; Under common carload condition; Nonvolatil distortion mainly is at summer temperature more than 25, and promptly table temperature in the road of bituminous pavement reaches 40～70 ℃, has has met or exceeded under the situation of softening point temperature of road bitumen to be easy to generate; And along with increasing the weight of of temperature rising and load, distortion is bigger.Be lower than this temperature on the contrary, just can not produce serious deformation.In China, most of areas all can have tens of day and even day surpass this temperature surplus in the of 100 among 1 year, reach such temperature condition although perhaps some only have only several days among local 1 year, also is unable to escape high temperature deformation destructive misfortune.
Bituminous pavement is the bearing load effect under hot conditions, and asphalt can produce distortion significantly, and wherein irreclaimable tension set just becomes rut.The existence of rut has reduced the use properties on road surface, jeopardizes traffic safety, thereby shortens the work-ing life of bituminous pavement; The rut of motorway be bituminous pavement one of collapse mode of harm arranged most.In addition, in the pavement process of steel case beam,, seriously influence road surface situation and construction effect because phenomenons such as bag can appear pushing, gather around in asphalt under hot conditions.
For the insufficient situation of above stability at high temperature of asphalt mixture, the someone has invented products such as anti-rut agent in succession, through increasing the viscoelastic way of pitch, improves the bituminous concrete high-temperature stability.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of phase change asphalt pavement material, the phase change asphalt pavement material of this method preparation can improve the high-temperature stability on road surface.
To achieve these goals, technical scheme of the present invention is: a kind of preparation method of phase change asphalt pavement material is characterized in that it comprises the steps:
1), the preparation of phase transformation asphalt modifier: be phase change material 1.: setting accelerator: propping material by mass ratio: coupling agent=100: 1～5: 10～50: 1～5, choose phase change material, setting accelerator, propping material and coupling agent, subsequent use;
Described phase change material is polyoxyethylene glycol (1000,2000), Vilaterm (carbon chain lengths 20～30) or paraffin (carbon chain lengths 16～20);
Described setting accelerator is CaCl
2Or MgCl
2
Described propping material is silicon-dioxide or Z 150PH;
Described coupling agent is 1,4-butyleneglycol or metatitanic acid vinegar;
2. phase change material being joined mass concentration is that silicon sol and phase change material mass ratio are 100: 10～20 in 20%～40% the silicon sol, treats that phase change material is all after the dissolving; Drip setting accelerator; Under agitation, make it that gelation reaction take place, leave standstill the back and form the two-dimensional network structural gel; With gel forced air drying 24～48h in 70～90 ℃ of baking ovens, be cooled to room temperature and take out and to smash to pieces, and stir powder (particle diameter≤0.1mm); Vacuumize 2～4h with under 30～50 ℃ of the powders, under the protection of shielding gas, add propping material then, under 80～100 ℃ of temperature, add coupling agent hydrophobically modified 2～6h; Granulation then gets the phase transformation asphalt modifier;
2) preparation of phase change asphalt pavement material: be coarse aggregate 1.: fine aggregate: filler: pitch: fiber: phase transformation asphalt modifier=100: 10～20: 1～8: 2～6: 0.2～0.5: 2～10 by mass ratio; Choose coarse aggregate, fine aggregate, filler, pitch, fiber and phase transformation asphalt modifier, subsequent use;
2. coarse aggregate, fine aggregate and fiber are stirred 30～60s in agitator kettle; Add the phase transformation asphalt modifier and continue to stir 60～90s, add pitch restir 60～90s, add filler at last and mix and stir 60～90s; Wherein coarse aggregate, fine aggregate and filler are heated to 150～190 ℃; 150～170 ℃ of pitch Heating temperatures, 160～180 ℃ of agitator kettle design temperatures get phase change asphalt pavement material.
Described shielding gas is nitrogen or argon gas.
Described coarse aggregate, fine aggregate are Irish touchstone, diabase or ls.
Described filler is a limestone dust.
Described pitch is road 70# pitch or SBS modifying asphalt (SBS is a styrene-butadiene rubber(SBR)).
Described fiber is selected trevira, lignin fibre or mineral fibre for use.
The invention has the beneficial effects as follows: adopt the phase transformation asphalt modifier the asphalt pavement material modification; Heat absorption delays the rising of temperature in the high temperature period to make the road surface; Thereby reduce the temperature sensitivity of bituminous material in low temperature period release of heat; Dwindle the variation range of pavement temperature, improve the high-temperature stability on road surface, prolong pavement life.The fluid seepage problem that the present invention has adopted solid-liquid phase change material setting technology to solve in phase transition process, to occur also and selects for use polyoxyethylene glycol, Vilaterm, phase change materials such as paraffin to solve solid-liquid phase change material seepage liquid and the bituminous problem of dissolving each other.The phase change asphalt pavement material of the present invention's preparation can reduce pavement temperature more than 2～10 ℃, effectively slows down the destruction of high temperature road pavement, strengthens the high temperature resistant property on road surface.
Description of drawings
Fig. 1 is a temperature under the summer high temperature condition, the temperature and time variation relation figure of plain asphalt ground surface material and phase change asphalt pavement material.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following embodiment.
A kind of preparation method of phase change asphalt pavement material, it comprises the steps:
1), the preparation of phase transformation asphalt modifier: be phase change material 1.: setting accelerator: propping material: coupling agent=100: 2: 20 by mass ratio: 2.4, choose phase change material, setting accelerator, propping material and coupling agent, subsequent use;
Described phase change material is polyoxyethylene glycol (1000,2000);
Described setting accelerator is CaCl
2
Described propping material is a Z 150PH;
Described coupling agent is a metatitanic acid vinegar;
2. phase change material being joined mass concentration is that silicon sol and phase change material mass ratio are 100: 12 in 25% the silicon sol, treats that phase change material is all after the dissolving; Drip setting accelerator; Under brute force stirs, make it that gelation reaction take place, leave standstill the back and form the two-dimensional network structural gel; With gel forced air drying 30h in 80 ℃ of baking ovens, be cooled to room temperature and take out and to smash to pieces, and brute force stir powder (particle diameter≤0.1mm); Vacuumize 3h with under 40 ℃ of the powders,, under the protection of shielding gas, add propping material then, under 90 ℃ of temperature, add coupling agent hydrophobically modified 2～6h to remove most moisture; Process the particle that radius is 1～2mm through the forcing machine extruding pelletization, get the phase transformation asphalt modifier; Described shielding gas is a nitrogen;
2) preparation of phase change asphalt pavement material: be coarse aggregate 1.: fine aggregate: filler: pitch: fiber: phase transformation asphalt modifier=100: 11: 1.5: 4: 0.3: 4 by mass ratio; Choose coarse aggregate, fine aggregate, filler, pitch, fiber and phase transformation asphalt modifier, subsequent use;
Described coarse aggregate, fine aggregate are Irish touchstone, nominal maximum aggregate size 9.5mm;
Described filler is a limestone dust;
Described pitch is SBS modifying asphalt (SBS is a styrene-butadiene rubber(SBR));
Described fiber is selected trevira for use;
2. coarse aggregate, fine aggregate and fiber are stirred 50s in agitator kettle; Add the phase transformation asphalt modifier and continue to stir 70s, add pitch restir 70s, add filler at last and mix and stir 70s; Wherein coarse aggregate, fine aggregate and filler are heated to 180 ℃; 160 ℃ of pitch Heating temperatures, 170 ℃ of agitator kettle design temperatures get phase change asphalt pavement material.
The phase change asphalt pavement material of preparation can reduce by 5 ℃ on road surface.Dynamic stability can reach 7900 times/mm.
Embodiment 2:
A kind of preparation method of phase change asphalt pavement material, it comprises the steps:
1), the preparation of phase transformation asphalt modifier: be phase change material 1.: setting accelerator: propping material: coupling agent=100: 3: 20 by mass ratio: 3.2, choose phase change material, setting accelerator, propping material and coupling agent, subsequent use;
Described phase change material is Vilaterm (carbon chain lengths 20～30);
Described setting accelerator is MgCl
2
Described propping material is a Z 150PH;
Described coupling agent is 1, the 4-butyleneglycol;
2. phase change material being joined mass concentration is that silicon sol and phase change material mass ratio are 100: 15 in 30% the silicon sol, treats that phase change material is all after the dissolving; Drip setting accelerator; Under brute force stirs, make it that gelation reaction take place, leave standstill the back and form the two-dimensional network structural gel; With gel forced air drying 30h in 80 ℃ of baking ovens, be cooled to room temperature and take out and to smash to pieces, and brute force stir powder (particle diameter≤0.1mm); Vacuumize 3h with under 40 ℃ of the powders,, under the protection of shielding gas, add propping material then, under 90 ℃ of temperature, add coupling agent hydrophobically modified 4h to remove most moisture; Make the particle that radius is 1～2mm through the tabletting machine compressing tablet, get the phase transformation asphalt modifier; Described shielding gas is an argon gas;
2) preparation of phase change asphalt pavement material: be coarse aggregate 1.: fine aggregate: filler: pitch: fiber: phase transformation asphalt modifier=100: 14: 3: 4.5: 0.3: 4 by mass ratio; Choose coarse aggregate, fine aggregate, filler, pitch, fiber and phase transformation asphalt modifier, subsequent use;
Described gathering materials is that diabase, nominal maximum aggregate size are 16mm;
Described filler is a limestone dust;
Described pitch is road 70# pitch;
Described fiber is selected lignin fibre for use;
2. coarse aggregate, fine aggregate and fiber are stirred 60s in agitator kettle; Add the phase transformation asphalt modifier and continue to stir 80s, add pitch restir 80s, add filler at last and mix and stir 80s; Wherein coarse aggregate, fine aggregate and filler are heated to 190 ℃; 170 ℃ of pitch Heating temperatures, 180 ℃ of agitator kettle design temperatures get phase change asphalt pavement material.
The phase change asphalt pavement material of preparation can reduce by 7 ℃ on road surface, and dynamic stability can reach 9000 times/mm.
Embodiment 3:
A kind of preparation method of phase change asphalt pavement material, it comprises the steps:
1), the preparation of phase transformation asphalt modifier: be phase change material 1.: setting accelerator: propping material: coupling agent=100: 1: 10 by mass ratio: 1, choose phase change material, setting accelerator, propping material and coupling agent, subsequent use;
Described phase change material is paraffin (carbon chain lengths 16～20);
Described setting accelerator is CaCl
2
Described propping material is a silicon-dioxide;
Described coupling agent is 1, the 4-butyleneglycol;
2. phase change material being joined mass concentration is that silicon sol and phase change material mass ratio are 100: 10 in 20% the silicon sol, treats that phase change material is all after the dissolving; Drip setting accelerator; Under brute force stirs, make it that gelation reaction take place, leave standstill the back and form the two-dimensional network structural gel; With gel forced air drying 24h in 70 ℃ of baking ovens, be cooled to room temperature and take out and to smash to pieces, and brute force stir powder (particle diameter≤0.1mm); Vacuumize 2h with under 30 ℃ of the powders,, under the protection of shielding gas, add propping material then, under 80 ℃ of temperature, add coupling agent hydrophobically modified 4h to remove most moisture; Process the particle that radius is 1～2mm through the forcing machine extruding pelletization, get the phase transformation asphalt modifier; Described shielding gas is a nitrogen;
2) preparation of phase change asphalt pavement material: be coarse aggregate 1.: fine aggregate: filler: pitch: fiber: phase transformation asphalt modifier=100: 16: 2: 4.8: 0.2: 3 by mass ratio; Choose coarse aggregate, fine aggregate, filler, pitch, fiber and phase transformation asphalt modifier, subsequent use;
Described coarse aggregate, fine aggregate are ls;
Described filler is a limestone dust;
Described pitch is road 70# pitch;
Described fiber is selected mineral fibre for use;
2. coarse aggregate, fine aggregate and fiber are stirred 30s in agitator kettle; Add the phase transformation asphalt modifier and continue to stir 60s, add pitch restir 60s, add filler at last and mix and stir 60s; Wherein coarse aggregate, fine aggregate and filler are heated to 150 ℃; 150 ℃ of pitch Heating temperatures, 160 ℃ of agitator kettle design temperatures get phase change asphalt pavement material.
The phase change asphalt pavement material of preparation can reduce by 6 ℃ on road surface.Dynamic stability can reach 8400 times/mm.
Embodiment 4:
A kind of preparation method of phase change asphalt pavement material, it comprises the steps:
1), the preparation of phase transformation asphalt modifier: be phase change material 1.: setting accelerator: propping material: coupling agent=100: 5: 50 by mass ratio: 5, choose phase change material, setting accelerator, propping material and coupling agent, subsequent use;
Described phase change material is polyoxyethylene glycol (1000,2000);
Described setting accelerator is MgCl
2
Described propping material is a Z 150PH;
Described coupling agent is a metatitanic acid vinegar;
2. phase change material being joined mass concentration is that silicon sol and phase change material mass ratio are 100: 18 in 30% the silicon sol, treats that phase change material is all after the dissolving; Drip setting accelerator; Under brute force stirs, make it that gelation reaction take place, leave standstill the back and form the two-dimensional network structural gel; With gel forced air drying 48h in 90 ℃ of baking ovens, be cooled to room temperature and take out and to smash to pieces, and brute force stir powder (particle diameter≤0.1mm); Vacuumize 4h with under 50 ℃ of the powders,, under the protection of shielding gas, add propping material then, under 100 ℃ of temperature, add coupling agent hydrophobically modified 5h to remove most moisture; Process the particle that radius is 1～2mm through the forcing machine extruding pelletization, get the phase transformation asphalt modifier; Described shielding gas is an argon gas;
2) preparation of phase change asphalt pavement material: be coarse aggregate 1.: fine aggregate: filler: pitch: fiber: phase transformation asphalt modifier=100: 18: 9: 6: 0.5: 12 by mass ratio; Choose coarse aggregate, fine aggregate, filler, pitch, fiber and phase transformation asphalt modifier, subsequent use;
Described coarse aggregate, fine aggregate are Irish touchstone;
Described filler is a limestone dust;
Described pitch is road 70# pitch;
Described fiber is selected trevira for use;
2. coarse aggregate, fine aggregate and fiber are stirred 40s in agitator kettle; Add the phase transformation asphalt modifier and continue to stir 90s, add pitch restir 90s, add filler at last and mix and stir 90s; Wherein coarse aggregate, fine aggregate and filler are heated to 190 ℃; 170 ℃ of pitch Heating temperatures, 180 ℃ of agitator kettle design temperatures get phase change asphalt pavement material.The phase change asphalt pavement material of preparation can reduce by 5 ℃ on road surface.Dynamic stability can reach 6300 times/mm.
Claims (6)
1. the preparation method of a phase change asphalt pavement material is characterized in that it comprises the steps:
1), the preparation of phase transformation asphalt modifier: be phase change material 1.: setting accelerator: propping material by mass ratio: coupling agent=100: 1～5: 10～50: 1～5, choose phase change material, setting accelerator, propping material and coupling agent, subsequent use;
Described phase change material is polyoxyethylene glycol, Vilaterm or paraffin;
Described setting accelerator is CaCl
2Or MgCl
2
Described propping material is silicon-dioxide or Z 150PH;
Described coupling agent is 1,4-butyleneglycol or metatitanic acid vinegar;
2. phase change material being joined mass concentration is that silicon sol and phase change material mass ratio are 100: 10～20 in 20%～40% the silicon sol, treats that phase change material is all after the dissolving; Drip setting accelerator; Under agitation, make it that gelation reaction take place, leave standstill the back and form the two-dimensional network structural gel; With gel forced air drying 24～48h in 70～90 ℃ of baking ovens, be cooled to room temperature and take out and to smash to pieces, and stir powder, the particle diameter≤0.1mm of powder; Vacuumize 2～4h with under 30～50 ℃ of the powders, under the protection of shielding gas, add propping material then, under 80～100 ℃ of temperature, add coupling agent hydrophobically modified 2～6h; Granulation then gets the phase transformation asphalt modifier;
2) preparation of phase change asphalt pavement material: 1. by mass ratio for being coarse aggregate by mass ratio: fine aggregate: filler: pitch: fiber: phase transformation asphalt modifier=100: 10～20: 1～8: 2～6: 0.2～0.5: 2～10; Choose coarse aggregate, fine aggregate, filler, pitch, fiber and phase transformation asphalt modifier, subsequent use;
2. coarse aggregate, fine aggregate and fiber are stirred 30～60s in agitator kettle; Add the phase transformation asphalt modifier and continue to stir 60～90s, add pitch restir 60～90s, add filler at last and mix and stir 60～90s; Wherein coarse aggregate, fine aggregate and filler are heated to 150～190 ℃; 150～170 ℃ of pitch Heating temperatures, 160～180 ℃ of agitator kettle design temperatures get phase change asphalt pavement material.
2. the preparation method of a kind of phase change asphalt pavement material according to claim 1, it is characterized in that: described shielding gas is nitrogen or argon gas.
3. the preparation method of a kind of phase change asphalt pavement material according to claim 1, it is characterized in that: described coarse aggregate, fine aggregate are Irish touchstone, diabase or ls.
4. the preparation method of a kind of phase change asphalt pavement material according to claim 1, it is characterized in that: described filler is a limestone dust.
5. the preparation method of a kind of phase change asphalt pavement material according to claim 1, it is characterized in that: described pitch is road 70# pitch or SBS modifying asphalt.
6. the preparation method of a kind of phase change asphalt pavement material according to claim 1, it is characterized in that: described fiber is selected trevira, lignin fibre or mineral fibre for use.
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