CN107418232A - A kind of high durable thermochromism modified pitch and preparation method thereof - Google Patents
A kind of high durable thermochromism modified pitch and preparation method thereof Download PDFInfo
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- CN107418232A CN107418232A CN201710743856.1A CN201710743856A CN107418232A CN 107418232 A CN107418232 A CN 107418232A CN 201710743856 A CN201710743856 A CN 201710743856A CN 107418232 A CN107418232 A CN 107418232A
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- pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Civil Engineering (AREA)
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- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention provides a kind of high-weatherability thermochromism modified pitch and preparation method thereof, and the high-weatherability thermochromism modified pitch is made up of the former section of following mass percent:Pitch 90~96.5%, thermochromic powder (red, blue two kinds) 5~7.0%.The high durable thermochromism of the present invention is modified the blue or green preparation method of soup, comprises the following steps:(1) raw material is prepared, wherein thermochromic powder mass percent 5~7.0%, asphalt quality percentage 90~96.5% is standby；(2) pitch is added in shear mixer, heated asphalt adds thermochromic powder, start shear mixer to 140~150 DEG C, in 3000~4000rpm rotating speed high-speed stirred 1~1.5 hour, keeps 140~150 DEG C of temperature to produce.The high durable thermochromism modified pitch of the present invention has excellent heat-resisting oxygen and resistance to UV aging, can significantly extend the service life of bituminous paving.
Description
Technical field
The present invention relates to a kind of high durable pitch and preparation method thereof, is modified more particularly, to a kind of high durable thermochromism
Pitch and preparation method thereof.
Background technology
Because bituminous paving has excellent pavement performance and comfortable train operation performance, oneself turn into China or even the world is each its
State's highway builds in fortune the main road surface types used.But pitch is as a kind of high-molecular organic material, heating or from
Right factor effect is lower easily to occur aging, can accelerate the generation of the diseases such as pavement crack, pit, peeling, so as to influence bituminous paving
Pavement performance and service life.Therefore, the ageing resistace of pitch is improved, for having for improving the durability of bituminous paving
Significance.
The aging of pitch is often divided into from weatherability caused by high temperature and by sunshine (ultraviolet mainly wherein included)
Irradiate the ultraviolet ageing hit.The own comparative maturity of the Research on Weatherability of pitch at present, its form are mainly included in stand of holding and construct
The short ageing in paving stage and the long-term ageing for making to hang gradient in road.It can pass through mixing the short ageing in the stage that paves of constructing
Rotary thin film in drying oven aging (RTFOT) or thin film oven aging (TOFT) carry out Simulation evaluation, in the length in road occupation stage
Phase aging can dry nationality (PAV) aging to carry out Simulation evaluation by pressure aging.Reality of the ultraviolet ageing of pitch in bituminous paving
It is during the use of border and very important.Most of polymer molecule bond energy and ultraviolet in pitch (wavelength is 290~
The luminous energy that 400nm) wavelength far encloses is suitable, when asphalt material is by ultraviolet radiation, the fracture of chemical bond energy-absorbing, is formed freely
Base, and trigger chain reaction, asphaltene molecule structure is destroyed.Macroscopically show as pitch and be hardened to become fragile, with the adhesion gathered materials
Property be deteriorated, most cause road surface to produce crack, pit, the disease such as peeling at last.In summary, the weatherability and ultraviolet ageing of pitch
The pavement performance of bituminous paving will all be produced in service life and had a strong impact on.However, at present for the blue or green aging of improvement soup
Can, it there is no effective method.
Chinese patent application 200410069166.5 discloses one kind by adding in powder styrene butadiene rubber modified pitch
Calcium-base bentonite or sodium-ionized bentonite or organo-bentonite is added not to improve the method for thermo oxidative aging performance of pitch.Feng Zhengang
Et al. have studied three kinds of UV absorbers (Octabenzone, Bumetrizole, Tinuvin770) to ageing of asphalt performance
Influence.As a result show, what 3 kinds of UV absorbers can effectively improve pitch wipes ultraviolet light and aging performance, and to pitch
Heatproof air aging performance has no significant effect [Feng Zhengang, Chen Chong, Li Peilong, Li Xinjun, Yu Jianying, UV absorbers modification drip
Blue or green rheology and ageing properties, highway, 2016, (1):206-210].Chinese patent application 200810150313.X discloses
A kind of road being made up of age resistor, antioxidant, photomask agent occupies ageing resistance composite modifying agent for bitumen, improves the heat resistanceheat resistant oxygen of pitch
Ageing properties.Zhang Henglong etc. have studied Organized Vermiculite and nanometer Ti02Improvement effect of the compound modifier to pitch ageing resistace
Fruit.Research shows that the compound modifier of different addition quantity has improvement to the short-term and long-term thermal-oxidative aging property of pitch, purple
The improvement of outer photooxidation aging property only could embody that (Zhang Henglong, Tan Bangyao, Zhu Chong political affairs have under specific compound modifier volume
The ageing resistace research Chinese science and technology papers of machine vermiculite and the composite modified pitch of nanometer titanium dioxide iron, 2016:728-732).
The scheme of the above document report or only one-sided consideration improve the heat-resisting oxygen of pitch or put forward ultraviolet ageing performance, or attempt
Integrate the improvement heat-resisting oxygen of pitch by the compounding of modifying agent and build ultraviolet ageing performance, but improvement is not ideal.
Therefore, it is necessary to explore the new method of hot oxygen and resistance to UV aging when improving pitch.
The technical problem to be solved in the present invention is overcome the deficiencies in the prior art, there is provided one kind can be the same as constantly hot oxygen and anti-
High durable thermochromism modified pitch of ultraviolet ageing and preparation method thereof.
The present invention solves the technical scheme that its technical problem uses:
The high durable thermochromism modified pitch of the present invention, is mainly made from effective raw material of following mass percent:Pitch 90
~96.5%, thermochromic powder 5~7.0%.
The pitch is bi tumenf orr oad, and its softening point is 42~53 DEG C, and 25 DEG C of needle penetrations are more than 40dmm (1dmm=
1/10mm)。
Its discoloring temperature of the thermochromic powder is 28-32 DEG C
The preparation method of the ageing-resistant thermochromism modified pitch of the present invention, comprises the following steps:
(1) mass percent as shared by each raw material is:Pitch 90~96.5%, thermochromic powder 5~7.0% prepare raw material,
It is standby:
(2) pitch is added in shear mixer, heated asphalt adds thermochromic powder, start shearing to 140~150 DEG C
Mixer, in 3000~4000rpm rotating speed r high-speed stirreds 1~1.5 hour, keeping temperature is 140~150 DEG C, is produced.
Beneficial effects of the present invention are as follows:
By introducing a kind of new material (thermochromic powder) into pitch, the high durable pitch being prepared while have
Excellent heat-resisting oxygen and anti-purple well ageing properties, it can effectively extend the service life of bituminous paving.
Embodiment
For a better understanding of the present invention, present disclosure is illustrated with reference to implementing to pour two steps into, but the present invention
Content is not limited solely to the following examples.
Embodiment 1
The high durable thermochromism modified pitch of the present embodiment, is made from the raw material of following mass percent:Pitch 98%, thermic
Change colour powder (black) 2%.
The pitch is bi tumenf orr oad, and its softening point is 46.5 DEG C, and 25 DEG C of needle penetrations are 64.2.
The black reversible temperature-sensing discoloring material that the thermochromic powder produces for high abundant scientific and technological Duan Fen Co., Ltds.It becomes
Color temperature is 31 DEG C.
The high durable of the present embodiment meets the preparation method of thermochromism modified pitch, comprises the following steps:
(1) measuring number by each former clerk is:2 parts of 96 parts of pitch, thermochromic powder (black) preparation raw materials, it is standby:
(2) pitch is added into shearing skill to mix in machine, spills heated bitumen to 140 DEG C, playing the part of thermochromic powder (black) by 2 is added to 96
Oneself is warming up in 145 DEG C of pitch part, starts shear mixer, and keeping temperature is 145 ± 5 DEG C, is carried under 3000rpm rotating speed
Mix 1 hour, produce.
Carry out thin film oven aging (TFO T) to the modified pitch, 145 DEG C of viscosity before and after modified pitch aging by
481.3cp increases to 746.9cp, and its viscosity aging index is 55.2%, and softening point increases to 55.4 DEG C from 47 DEG C, and softening point increases
Measure as 8.4 DEG C.And the pitch of thermochromic powder is not added, 145 DEG C of viscosity are increased by 470cp and played before and after TFOT agings
737.4cp, its viscosity aging index are 56.9%, and softening point increases from 46.5 DEG C is rushed to 55.8 DEG C, and softening point increment is 9.3 DEG C.
Viscosity and softening point method of testing are pressed respectively《Highway engineering pitch and Asphalt Mixture Experiment code>>(JTG E 20-2011)
Middle T0661-2011 and T 0606-2011 regulation is carried out.The two is compared, and pouring in thermochromic powder, (black ＞ pitch exists
Before and after TFOT agings, viscosity aging index and softening point increment takes the aobvious pitch for being less than and not adding thermochromic powder, thus
Gained modified pitch of the invention has more excellent weatherability and antioxygenic property.
Embodiment 2
The high durable thermochromism modified pitch of the present embodiment, from following mass percent~material be made:Pitch 96.0%, heat
Mutagens color powder (black) 3.8%.
The pitch is bi tumenf orr oad, and its softening point is 46.5 DEG C, and 25 DEG C of needle penetrations are 64.2dmm
Its discoloring temperature of the thermochromic powder is 31 DEG C.
The each method processed of aging thermochromism modified pitch, comprises the following steps when the present embodiment:
(1) it is by each raw material shield amount number:3.8 parts of 96.0 parts of pitch, thermochromic powder preparation raw materials, it is standby:
(2) pitch is added in shear mixer, heated asphalt is added to 96.0 parts to 140 DEG C, by 3.8 parts of thermochromic powders
Oneself is warming up in 140 DEG C of pitch, starts shear mixer, and keeping temperature is 140 ± 5 DEG C, is stirred under 3000rpm rotating speed
1 hour, produce.
To the modified pitch carry out it is thin touch oven ageing (TFOT), 135 DEG C of viscosity before and after modified pitch aging by
532.5cp increases to 809.4cp, and its viscosity aging index is 52%, and softening point increases to 54.8 DEG C by 47.3 DEG C, and softening point increases
Measure as 7.5 DEG C.And do not add the pitch of thermochromic powder, 135 DEG C of viscosity increase to 737.4cp from 470cp before and after TFOT agings,
Its viscosity aging index is 56.9%, and softening point increases to 55.8 DEG C from 46.5 DEG C, and softening point increment is 9.3 DEG C.Viscosity and soft
Change point method of testing to press respectively《Highway engineering pitch and Asphalt Mixture Experiment code>>T 0661- in (JTG E 20-2011)
2011 and T0606-2011 regulation is carried out.The two is compared, and adding bat mutagens color powder, (black ＞ pitch is before TFOT agings
Afterwards, viscosity aging index and softening point increment is significantly lower than the pitch for not adding thermochromic powder, thus with more excellent
Resistance to short-term thermal-oxidative aging property.Compared with case one, with the increase of such as mutagens color powder dosage, the oxygen of resistance to short term thermal of pitch
Ageing properties have obtained further improving.
Embodiment 3
The high durable thermochromism modified pitch of the present embodiment, is made from the raw material of following mass percent:Pitch 96.0%, heat
Mutagens color powder (black) 5.8%.
The pitch is bi tumenf orr oad, and its softening point is 46.5 DEG C, and 25 DEG C of needle penetrations are 64.2dmm.
Its discoloring temperature of the thermochromic powder is 28 DEG C.
The preparation method of the ageing-resistant pitch of the present embodiment, comprises the following steps:
(1) measuring number by each former clerk is:Pitch 96.5.8 parts of 0 part, thermochromic powder preparation raw materials, it is standby:
(2) pitch is added into shearing skill to mix in machine, spills heated bitumen to 140 DEG C, 5.8 parts of thermochromic powders are added to 96.0 parts
Oneself is warming up in 140 DEG C of pitch, starts shear mixer, and keeping temperature is 140 ± 5 DEG C, is stirred under 3000rpm rotating speed
1 hour, produce.
6UV agings are carried out in 60 DEG C of UV ageing ovens to the modified pitch, 135 DEG C before and after the aging of modified pitch mountain
Viscosity increases to 859.5cp by 532.5cp, and its viscosity aging index is 6 1.4%, and softening point increases to 56.9 from 47.3 DEG C
DEG C, softening point increment is 9.6 DEG C.Elder brother does not add the pitch of thermochromic powder, and 135 DEG C of viscosity increase from 470cp before and after UV agings
818.7cp is added to, its viscosity aging index is 74.2%, and softening point increases to 57 DEG C from 46.5 DEG C, and softening point increment is 10.5
℃.Viscosity and softening point method of testing are pressed respectively《Highway engineering pitch and Asphalt Mixture Experiment code river JTG E 202011)
Middle T 0661-2011 and T 0606-2011 regulation are carried out.The two is compared, and the pitch for adding thermochromic powder (black) exists
Before and after UV agings, viscosity aging index and softening point increment is significantly lower than the pitch for not adding thermochromic powder, thus has
More excellent resistance to UV aging.
Claims (1)
1. a kind of high durable thermochromism modified pitch and preparation method thereof, it is characterised in that mainly from following mass percent
Effective raw material be made:Pitch 90~96.5%, thermochromic powder 5~7.0%.Pitch is added in shear mixer, added
Heated bitumen adds thermochromic powder, starts shear mixer to 140~150 DEG C, high under 3000~4000rpm rotating speed
Speed stirring 1~1.5 hour, keeping temperature is 140~150 DEG C, is produced.
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| CN201710743856.1A CN107418232A (en) | 2017-08-25 | 2017-08-25 | A kind of high durable thermochromism modified pitch and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109054412A (en) * | 2018-08-01 | 2018-12-21 | 山东交通学院 | A kind of power mutagens color asphalt material and preparation method thereof for bituminous pavement in tunnel |
| CN109233307A (en) * | 2018-07-16 | 2019-01-18 | 湖南大学 | Temperature self adjusting road asphalt material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011689A (en) * | 2017-04-27 | 2017-08-04 | 湖南大学 | A kind of ageing-resistant thermochromism modified pitch and preparation method thereof |
-
2017
- 2017-08-25 CN CN201710743856.1A patent/CN107418232A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107011689A (en) * | 2017-04-27 | 2017-08-04 | 湖南大学 | A kind of ageing-resistant thermochromism modified pitch and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109233307A (en) * | 2018-07-16 | 2019-01-18 | 湖南大学 | Temperature self adjusting road asphalt material and preparation method thereof |
| CN109054412A (en) * | 2018-08-01 | 2018-12-21 | 山东交通学院 | A kind of power mutagens color asphalt material and preparation method thereof for bituminous pavement in tunnel |
| CN109054412B (en) * | 2018-08-01 | 2020-10-23 | 山东交通学院 | Force-induced color-changing asphalt material for asphalt pavement in tunnel and preparation method thereof |
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Application publication date: 20171201 |