CN104448857A - Modification method of low-temperature-resistant asphalt - Google Patents
Modification method of low-temperature-resistant asphalt Download PDFInfo
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- CN104448857A CN104448857A CN201410703761.3A CN201410703761A CN104448857A CN 104448857 A CN104448857 A CN 104448857A CN 201410703761 A CN201410703761 A CN 201410703761A CN 104448857 A CN104448857 A CN 104448857A
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- pitch
- low temperature
- temperature resistant
- modifying
- asphalt
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Abstract
The invention provides a modification method of low-temperature-resistant asphalt. The method comprises steps as follows: placing asphalt into an oil bath for heating dehydration, then pouring the dehydrated base asphalt into a shearing machine, adding chloroprene rubber powder and cold-resistant modifiers, namely, pine tar and turpentine in a certain proportion, to the shearing machine, and finally, uniformly shearing the mixture in the shearing machine at the high speed to prepare the low-temperature-resistant asphalt. The asphalt is good in low temperature resistance, simple in preparation technology and low in cost and has the good economic benefit and the broad application prospect.
Description
Technical field
The present invention relates to a kind of preparation of road base-material, particularly a kind of preparation method of low temperature resistant pitch, belongs to Material Field.
Background technology
Since reform and opening-up, China's Economic development is rapid, and highway development also achieves brilliant achievement, China Expressway is broken through 30,000 kilometers of total kilometrages and is occupied the second in the world, road construction facilitates the demand of pitch, and " 12 " period, road bitumen consumption is every year on average at about 1,500 ten thousand tons.
Pitch is divided into coal tar pitch, rock asphalt, petroleum pitch, and wherein petroleum pitch uses the most extensive, the residue after its crude distillation.According to the difference of the degree of refinement, become liquid, semisolid or solid at normal temperatures.Petroleum pitch look black and glossy, has higher temperature sensibility.Pitch is a lot of as pavior advantage, and one is wheel and road surface two-stage vibration damping, and therefore road-ability is good, noise is little; Two is flexible pavement strong adaptabilities to roadbed, foundation deformation or non-uniform settling; Three is that speed is repaired soon in road surface, can be open to traffic after rolling.Pitch be a kind of to temperature than more sensitive viscoelastic material, temperature raises or reduces, and its form and use properties all can change.When temperature raises, pitch deliquescing, thinning, the cohesive force reducing pitch Yu gather materials; When temperature reduces, pitch retrogradation, hardening and become fragile, lose the cohesive force to building stones.China is vast in territory, and south is large with boreal climate difference, and temperature, rainfall are not identical yet, and cause the behaviour in service difference of bituminous pavement very large, the reason difference that bituminous pavement destroys is large.Particularly cold district, high to the Low temperature property requirements of pitch, and plain asphalt can not meet use properties requirement, must adopt the measured pitch of matter, to meet the requirement of low temperature environment Pavement Performance in Distress.Thus, the important content that cost is low, technique is simple, low temperature resistant novel asphalt becomes pitch research is tried to explore.
Stockholm tar, also known as pine torches oil, pine stump tar, wood tar oil, is a kind of compound of complexity.It is Vandyke brown to dark thick liquid or semisolid, have special odor, be dissolved in ethanol, ether, chloroform, sodium hydroxide solution etc.The dispersion Stockholm tar of the viscosity and Synergist S-421 95 that contribute to sizing material is widely used in the aspects such as paint, plastics, contributes to the viscosity of sizing material and the dispersion of Synergist S-421 95, can improve the winter hardiness of goods, have and delay sulfuration under low temperature.Turps is also a kind of industrial chemicals, and it is rich in the pine tree of rosin for raw material, and the terpenes mixed solution that the volatility obtained by different processing modes has aromatic odour is called turps, is widely used in the industry such as paint, tackiness agent.The present invention prepares a kind of low temperature resistant modifying asphalt by interpolation Stockholm tar and turps, and it has good economical, societal benefits and wide popularizing application prospect.
Summary of the invention
The object of this invention is to provide a kind of method of modifying of low temperature resistant pitch, this preparation method carries out as follows:
(1), first by pitch holding vessel, be placed in the oil bath thermal dehydration of temperature controllable, and stir gently with glass stick;
(2), when pitch stops bubbling, stop heating, and pitch is poured in high-speed shearing machine;
(3) start high-speed shearing machine, control rotating speed within 500r/min;
(4) chloroprene rubber and appropriate Stockholm tar, turps are added in shears by a certain percentage;
(5) shears speed is increased to more than 600r/min, shears 5-10min, namely produce a kind of low temperature resistant modifying asphalt.
As preferred embodiments of the present invention, first grinds wanted by chloroprene rubber.
As preferred embodiments of the present invention, the turps of use forms with Pinus massoniana Lamb pine gum processing.
As preferred embodiments of the present invention, the interpolation proportioning of Stockholm tar and terebinthine interpolation total amount and bitumen base is less than 1:10, and wherein the proportioning of Stockholm tar and terebinthine addition is 1:1.
The present invention has following advantages and characteristic:
(1) this pitch cold resistance can be good;
(2) preparation technology is simple, and cost is low;
(3) flow time is short, easy scale operation.
Embodiment
Embodiment one:
(1) take 200g pitch and put into beaker, oil bath beaker being placed in 80 DEG C is heated, and stirs gently with glass stick, prevents local superheating;
(2), when pitch stops bubbling, stop heating;
(3) rapidly the pitch of dehydration is poured in high-speed shearing machine, start high-speed shearing machine, rotating speed is set to 300r/min;
(4) get chloroprene rubber powder powder 20g and Stockholm tar 5g and turps 5g to add in shears, and shears speed is increased to 600r/min;
(5) shear 5min, namely produce a kind of low temperature resistant pitch.
Embodiment two:
(1) take 500g pitch and put into beaker, oil bath beaker being placed in 90 DEG C is heated, and stirs gently with glass stick, prevents local superheating;
(2) observing pitch bubbling situation, when stopping emerging foam, stopping heating;
(3) rapidly the pitch of dehydration is poured in high-speed shearing machine, start high-speed shearing machine, rotating speed is set to 400r/min;
(4) get chloroprene rubber powder 50g and Stockholm tar 15g and turps 15g to add in shears, and shears speed is increased to 700r/min;
(5) shear 8min, namely produce a kind of low temperature resistant pitch.
Embodiment three:
(1) take 5000g pitch and put into iron ware, the oil bath being placed in 100 DEG C is heated, and stirs with wooden stick, prevents local superheating;
(2) observing pitch bubbling situation, when stopping emerging foam, stopping heating;
(3) rapidly the pitch of dehydration is poured in high-speed shearing machine, start high-speed shearing machine, rotating speed is set to 500r/min;
(4) get chloroprene rubber powder 300g and Stockholm tar 100g and turps 100g to add in shears, and shears speed is increased to 800r/min;
(5) shear 10min, namely produce a kind of low temperature resistant pitch.
Claims (4)
1. a method of modifying for low temperature resistant pitch, is characterized in that the method is carried out as follows:
(1), first by pitch container, the oil bath being placed in temperature controllable is heated, and stirs gently with glass stick;
(2), when pitch stops bubbling, stop heating, and pitch is poured in high-speed shearing machine;
(3) start high-speed shearing machine, control rotating speed within 500r/min;
(4) chloroprene rubber and appropriate Stockholm tar, turps are added in shears by a certain percentage;
(5) shears speed is increased to more than 600r/min, shears 5-10min, namely produce a kind of low temperature resistant modifying asphalt.
2. the method for modifying of a kind of low temperature resistant pitch according to claim 1, is characterized in that first grinds wanted by the chloroprene rubber added.
3. the method for modifying of a kind of low temperature resistant pitch according to claim 1, is characterized in that the turps used forms with Pinus massoniana Lamb pine gum processing.
4. the method for modifying of a kind of low temperature resistant pitch according to claim 1, is characterized in that Stockholm tar and terebinthine interpolation total amount are less than 1:10 with the interpolation total amount ratio of bitumen base, and wherein Stockholm tar and terebinthine addition are than being 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410703761.3A CN104448857A (en) | 2014-11-30 | 2014-11-30 | Modification method of low-temperature-resistant asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410703761.3A CN104448857A (en) | 2014-11-30 | 2014-11-30 | Modification method of low-temperature-resistant asphalt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104448857A true CN104448857A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410703761.3A Pending CN104448857A (en) | 2014-11-30 | 2014-11-30 | Modification method of low-temperature-resistant asphalt |
Country Status (1)
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| CN (1) | CN104448857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967362A (en) * | 2017-03-23 | 2017-07-21 | 覃淑兰 | A kind of low temperature resistant asphalt waterproofing paint and preparation method thereof |
-
2014
- 2014-11-30 CN CN201410703761.3A patent/CN104448857A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967362A (en) * | 2017-03-23 | 2017-07-21 | 覃淑兰 | A kind of low temperature resistant asphalt waterproofing paint and preparation method thereof |
| CN106967362B (en) * | 2017-03-23 | 2019-07-26 | 深圳市朗迈新材料科技有限公司 | A kind of low temperature resistant asphalt waterproofing paint and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |
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| WD01 | Invention patent application deemed withdrawn after publication |