CN102838875A - Preparation method for improving asphalt viscosity - Google Patents
Preparation method for improving asphalt viscosity Download PDFInfo
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- CN102838875A CN102838875A CN2012103478919A CN201210347891A CN102838875A CN 102838875 A CN102838875 A CN 102838875A CN 2012103478919 A CN2012103478919 A CN 2012103478919A CN 201210347891 A CN201210347891 A CN 201210347891A CN 102838875 A CN102838875 A CN 102838875A
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- tumenf orr
- dynamic viscosity
- coefficient
- oads
- orr oads
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Abstract
The invention relates to a preparation method for improving asphalt viscosity, and belongs to the field of pavement petroleum asphalt engineering. When the dynamic viscosity of the No.90 pavement petroleum asphalt is less than 160 Pa.s at the temperature of 60 DEG C, the No.70 pavement petroleum asphalt, of which the dynamic viscosity is greater than a target viscosity value at the temperature of 60 DEG C, can be used as a modifier according to the target viscosity value so as to improve the dynamic viscosity of the No.90 pavement petroleum asphalt at the temperature of 60 DEG C. The No.90 pavement petroleum asphalt and the No.70 pavement petroleum asphalt belong to the same material, have good compatibility and are free of the segregation phenomenon, and the price of the No.70 pavement petroleum asphalt is greatly lower than that of the traditional SBS modifier, so that the preparation method provided by the invention is an economic and practical technique method.
Description
Technical field
The present invention relates to the preparation method of No. 90 bi tumenf orr oads, relate to the preparation method of No. 90 bi tumenf orr oad viscositys of a kind of improvement specifically.
Background technology
60 ℃ of coefficient of dynamic viscosity of bi tumenf orr oad characterize the character that pitches at high temperature increase with the increase of deformation rate the opposing of deformation.60 ℃ of coefficient of dynamic viscosity values of bi tumenf orr oad show that more greatly its anti-deforming ability is strong more.In " asphalt highway construction technique normalizing " JTGF40-2004, stipulate: 60 ℃ of coefficient of dynamic viscosity of No. 90 bi tumenf orr oads are greater than 160Pa.s.
60 ℃ of coefficient of dynamic viscosity of bi tumenf orr oad are owing to being that a non-imposed technical indicator is ignored.In fact; All mandatory indexs when No. 90 bi tumenf orr oads; Like 25 ℃ of penetration degrees, softening temperature, 10 ℃ of ductilities, wax content, flash-point, solubleness, density, mass loss, 25 ℃ of residual penetration ratios after aging; 10 ℃ of residual ductilities, when satisfying the correlation technique requirement among " asphalt highway construction technique normalizing " JTG F40-2004, its 60 ℃ of coefficient of dynamic viscosity are but often defective; So just cause the high-temperature behavior of No. 90 bi tumenf orr oads relatively poor easily, thereby influence the anti-deforming ability of asphalt.
Improving 60 ℃ of coefficient of dynamic viscosity of No. 90 bi tumenf orr oads method commonly used at present is the SBS properties-correcting agent that in pitch, adds certain consumption.Because SBS properties-correcting agent is a kind of macromolecular material, difficult compatible with pitch, can produce segregation phenomenon with pitch when serious, thereby cause " temporary " of 60 ℃ of coefficient of dynamic viscosity of No. 90 bi tumenf orr oads to improve.SBS properties-correcting agent price is higher, is prone to cause the cost of No. 90 bi tumenf orr oads to increase considerably.Therefore, be necessary to develop the preparation technology of No. 90 bi tumenf orr oad viscositys of a kind of improvement, overcome the above-mentioned defective of prior art.
Summary of the invention
Problem to be solved by this invention is: a kind of preparation method is provided, can improves 60 ℃ of coefficient of dynamic viscosity of No. 90 road oil drop tables effectively, thereby improve the high temperature stability performance of pitch and compound thereof.
The object of the invention is realized through following technical scheme:
Select for use No. 70 bigger bi tumenf orr oads of 60 ℃ of coefficient of dynamic viscosity as properties-correcting agent; The properties-correcting agent that in No. 90 bi tumenf orr oads, adds optimum amount; Do not influencing under the prerequisite that No. 90 mandatory technical indicators of bi tumenf orr oad meet the demands; Improve its 60 ℃ of coefficient of dynamic viscosity, thereby improve the high temperature stability performance of pitch and compound thereof.
Owing to utilize No. 70 bi tumenf orr oads as properties-correcting agent, it belongs to allied substances with No. 90 bi tumenf orr oads, according to " compatible similar " principle, can not produce segregation phenomenon between the two, thereby improve the more remarkable effect of 60 ℃ of coefficient of dynamic viscosity of No. 90 pitch.Simultaneously, No. 70 bi tumenf orr oad existing market price is about 5000 yuan/ton, and price and No. 90 approaching do not increase expense basically, and the existing market price of SBS properties-correcting agent is about 20,000 yuan/ton, and comparatively speaking, technology of the present invention has more economy.
The practical implementation step is:
Step 1: the 60 ℃ of coefficient of dynamic viscosity and the other technologies index of No. 90 asphalt stone oily bitumens of test, confirm the target value of improving of 60 ℃ of coefficient of dynamic viscosity:
Step 2: detect through test, choose 60 ℃ of coefficient of dynamic viscosity greater than No. 70 bi tumenf orr oads as properties-correcting agent; 60 ℃ of coefficient of dynamic viscosity of No. 70 bi tumenf orr oads are high more, and it is good more to improve effect;
Step 3: No. 70 bi tumenf orr oads of different amounts are joined in No. 90 bi tumenf orr oads and mix; Test the technical indicator of the following No. 90 asphalt roads petroleum pitch of different properties-correcting agent consumptions, the consumption that the selecting technology index all meets the demands is as the optimum amount of No. 70 bi tumenf orr oad properties-correcting agent: the optimum amount of No. 70 bi tumenf orr oads
is 10～20% of No. 90 bi tumenf orr oad quality:
Step 4: product prepn: 120～130 ℃ No. 90 bi tumenf orr oads are squeezed in the retort; No. 70 bi tumenf orr oad properties-correcting agent that add optimum amount again at 120～130 ℃, start the retort insulation to stir; Stir 0.5～1h, carry out the qualified back of quality test finished product.
In above-mentioned steps three, the optimum amount of No. 70 bi tumenf orr oad properties-correcting agent is lg η by formula
2=(1-R
Ob) lg η
1+ R
ObLg η
0Calculate definite, wherein: η
2Represent 60 ℃ of coefficient of dynamic viscosity of pitch target (Pa.s); η
1Represent 60 ℃ of coefficient of dynamic viscosity (Pa.s) of No. 90 bi tumenf orr oads; η
oRepresent 60 ℃ of coefficient of dynamic viscosity (Pa.s) of No. 70 bi tumenf orr oads; R
ObRepresent optimum amount (%), just the mass ratio of No. 70 bi tumenf orr oads and No. 90 bi tumenf orr oads.
The present invention adopts No. 70 bi tumenf orr oads to improve 60 ℃ of coefficient of dynamic viscosity of No. 90 bi tumenf orr oads as properties-correcting agent; Because consistency between the two is good; Segregation phenomenon can be do not produced, 60 ℃ of coefficient of dynamic viscosity of No. 90 bi tumenf orr oads can be " permanent " improved.Simultaneously, No. 70 bi tumenf orr oads are as properties-correcting agent, and its price is well below the price of traditional SBS properties-correcting agent, and therefore, the present invention is a kind of economical and practical technological method.
Embodiment
Below in conjunction with specific examples the present invention is further specified, but content of the present invention not only is confined to following embodiment.
Embodiment 1
Step 1: the 60 ℃ of coefficient of dynamic viscosity and the other technologies index of No. 90 asphalt stone oily bitumens of test, the result sees table 1.
The performance index of table 1.90 bi tumenf orr oad
Can be known by table 1: 60 ℃ of coefficient of dynamic viscosity of No. 90 bi tumenf orr oads are 130.9Pa.s, and improving target value is 160Pa.s, and all the other indexs all satisfy technical requirements, and target value is taken from " asphalt highway construction technique normalizing " (JTG F40-2004).
Step 2: the 60 ℃ of coefficient of dynamic viscosity and the other technologies index of No. 70 bi tumenf orr oads of test, the result sees table 2.
The performance index of table 2.70 bi tumenf orr oad
Can be known by table 2: 60 ℃ of coefficient of dynamic viscosity of No. 70 bi tumenf orr oads are 208.5Pa.s, greater than improving target value.Other performance index all satisfy the technical requirements of No. 70 relevant among " asphalt highway construction technique normalizing " JTG F40-2004 bi tumenf orr oads.
Step 3: 60 ℃ of coefficient of dynamic viscosity according to No. 90 60 ℃ of coefficient of dynamic viscosity values of asphalt stone oily bitumen (130.9Pa.s), No. 90 bi tumenf orr oads improve target value (160Pa.s) and No. 70 60 ℃ of coefficient of dynamic viscosity values of asphalt stone oily bitumen (208.5Pa.s); No. 70 bi tumenf orr oads of difference amount are joined in No. 90 asphalt stone oily bitumens and mix; Test the technical indicator of following No. 90 bi tumenf orr oads of various different amounts; The consumption that the selecting technology index all meets the demands is as the optimum amount of properties-correcting agent, and the optimum amount of confirming No. 70 bi tumenf orr oad properties-correcting agent is 20%.Test improves back bituminous performance index, sees table 3.
Table 3. improves back bituminous performance index
Can be known by table 3: improving 60 ℃ of coefficient of dynamic viscosity of back bituminous has had significant raising; Bring up to 160.1Pa.s from original 130.9Pa.s, improve the technical requirements that back bituminous technical indicator all satisfies No. 90 relevant among " asphalt highway construction technique normalizing " JTG F40-2004 bi tumenf orr oads.
Step 4: product processing.120～130 ℃ No. 90 bi tumenf orr oads are squeezed in the retort; Add No. 70 bi tumenf orr oad properties-correcting agent that are equivalent to No. 90 bi tumenf orr oad quality 20% again, the retort insulation at 120～130 ℃, is started and stirs; Stir 0.5～1h, product.
Embodiment 2
In the step 3 of embodiment 1; 60 ℃ of coefficient of dynamic viscosity according to No. 90 60 ℃ of coefficient of dynamic viscosity values of asphalt stone oily bitumen (130.9Pa.s), No. 90 bi tumenf orr oads improve target value (160Pa.s) and No. 70 60 ℃ of coefficient of dynamic viscosity values of asphalt stone oily bitumen (208.5Pa.s), by formula lg η
2=(1-R
Ob) lg η
1+ R
ObLg η
0Calculating the optimum amount of confirming No. 70 bi tumenf orr oad properties-correcting agent is 20%.η in the formula
2Represent 60 ℃ of coefficient of dynamic viscosity of target (Pa.s); η
1Represent 60 ℃ of kinetic viscosities (Pa.s) of No. 90 bi tumenf orr oads; η
oRepresent 60 ℃ of kinetic viscosities (Pa.s) of No. 70 bi tumenf orr oads; R
ObRepresent optimum amount (%), just the mass ratio of No. 70 bi tumenf orr oads and No. 90 bi tumenf orr oads.
Other are identical with embodiment 1.
Claims (2)
1. preparation method who improves asphalt viscosity is characterized in that may further comprise the steps:
Step 1: the 60 ℃ of coefficient of dynamic viscosity and the other technologies index of No. 90 bi tumenf orr oads of test, confirm the target value of improving of 60 ℃ of coefficient of dynamic viscosity;
Step 2: detect through test, choose 60 ℃ of coefficient of dynamic viscosity greater than No. 70 bi tumenf orr oads of target value as properties-correcting agent;
Step 3: No. 70 bi tumenf orr oads of different amounts are joined in No. 90 bi tumenf orr oads and mix; Test the technical indicator of following No. 90 bi tumenf orr oads of various different amounts, the consumption that the selecting technology index all meets the demands is as the optimum amount of No. 70 bi tumenf orr oad properties-correcting agent;
Step 4: product prepn: 120～130 ℃ No. 90 bi tumenf orr oads are squeezed in the retort; No. 70 bi tumenf orr oad properties-correcting agent that add optimum amount again at 120～130 ℃, start the retort insulation to stir; Stir 0.5～1h, carry out the qualified back of quality test finished product.
2. a kind of preparation method who improves asphalt viscosity according to claim 1; It is characterized in that adopting formula lg η 2=(1-Rob) lg η 1+Roblg η 0 to calculate the optimum amount of No. 70 bi tumenf orr oad properties-correcting agent, wherein: η 2 represents 60 ℃ of coefficient of dynamic viscosity of target (Pa.s); η 1 represents 60 ℃ of kinetic viscosities (Pa.s) of No. 90 bi tumenf orr oads; η o represents 60 ℃ of kinetic viscosities (Pa.s) of No. 70 bi tumenf orr oads; Rob represents optimum amount (%), just the mass ratio of No. 70 bi tumenf orr oads and No. 90 bi tumenf orr oads.
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|---|---|---|---|
| CN201210347891.9A CN102838875B (en) | 2012-09-19 | 2012-09-19 | Preparation method for improving asphalt viscosity |
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|---|---|---|---|
| CN201210347891.9A CN102838875B (en) | 2012-09-19 | 2012-09-19 | Preparation method for improving asphalt viscosity |
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| CN102838875A true CN102838875A (en) | 2012-12-26 |
| CN102838875B CN102838875B (en) | 2015-07-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664011A (en) * | 2004-03-01 | 2005-09-07 | 回寒星 | Use of natural asphalt product with high melting point in modification of petroleum asphalt |
| WO2012038658A1 (en) * | 2010-09-24 | 2012-03-29 | Aliapur | Bitumen and rubber binder for coating pavement or the like, method for manufacturing same, and uses thereof |
| US20120129984A1 (en) * | 2010-05-07 | 2012-05-24 | Midwest Industrial Supply, Inc. | Method and composition for road construction and surfacing |
| JP2012116897A (en) * | 2010-11-29 | 2012-06-21 | Showa Shell Sekiyu Kk | Polymer-modified asphalt composition |
| CN102660124A (en) * | 2012-05-07 | 2012-09-12 | 哈尔滨工业大学 | Bio-asphalt material for road and preparation method for bio-asphalt material |
-
2012
- 2012-09-19 CN CN201210347891.9A patent/CN102838875B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664011A (en) * | 2004-03-01 | 2005-09-07 | 回寒星 | Use of natural asphalt product with high melting point in modification of petroleum asphalt |
| US20120129984A1 (en) * | 2010-05-07 | 2012-05-24 | Midwest Industrial Supply, Inc. | Method and composition for road construction and surfacing |
| WO2012038658A1 (en) * | 2010-09-24 | 2012-03-29 | Aliapur | Bitumen and rubber binder for coating pavement or the like, method for manufacturing same, and uses thereof |
| JP2012116897A (en) * | 2010-11-29 | 2012-06-21 | Showa Shell Sekiyu Kk | Polymer-modified asphalt composition |
| CN102660124A (en) * | 2012-05-07 | 2012-09-12 | 哈尔滨工业大学 | Bio-asphalt material for road and preparation method for bio-asphalt material |
Non-Patent Citations (2)
| Title |
|---|
| 季节等: ""热再生沥青混合料的配合比设计"", 《公路》 * |
| 徐世法等: ""高节能低排放型温拌沥青混合料的"", 《公路》 * |
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