CN103613327A - Pouring type bituminous concrete bridge deck pavement material prepared by using waste plastic modifier - Google Patents
Pouring type bituminous concrete bridge deck pavement material prepared by using waste plastic modifier Download PDFInfo
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- CN103613327A CN103613327A CN201310601387.1A CN201310601387A CN103613327A CN 103613327 A CN103613327 A CN 103613327A CN 201310601387 A CN201310601387 A CN 201310601387A CN 103613327 A CN103613327 A CN 103613327A
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- bridge deck
- waste plastic
- asphalt concrete
- deck pavement
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Abstract
The invention provides a pouring type bituminous concrete bridge deck pavement material prepared by using a waste plastic modifier. Pouring type bituminous concrete for steel bridge deck pavement can be prepared from modified bituminous and aggregate mixture. The pouring type bituminous concrete bridge deck pavement material is creatively characterized by comprising the modified bituminous and various ingredients in percentage by weight as follow: 70% of matrix bituminous, 6% of waste plastic modifier, 5% of SBS (Styrene Butadiene Styrene) modifier, and 19% of lake bituminous. The pouring type bituminous concrete bridge deck pavement material has the beneficial technical effect that the dynamic stability of the bridge deck pavement structure under high-temperature environment can be enhanced.
Description
Technical field
The present invention relates to a kind of pouring asphalt concrete deck paving technology, relate in particular to a kind of pouring asphalt concrete bridge deck pavement material with modifying waste plastic agent preparation.
Background technology
Pouring asphalt concrete has that good waterproof performance, snappiness are strong, weather resistance and the good characteristic such as caking ability is good, is usually used in making seepage prevention in the impervious core of roller compacted concrete dam and earth rockfill dam.This is just can flow the voluntarily asphalt of closely knit moulding of a kind of not steamroller.
For the material of paving steel bridge deck, must there is good flexibility to avoid deck paving to produce destruction under gross distortion condition, require its bridge deck pavement have with bridge floor cohesiveness by force, good waterproof performance, performance that snappiness is good and durable.Possess these performances, pouring asphalt concrete becomes the preferred structure material of paving steel bridge deck.Yet, different from the pouring asphalt concrete for antiseepage, pouring asphalt concrete for deck paving is not only wanted antiseepage, pliable and tough and durable is good, but also should there is enough high-temperature stabilities, to avoid paving structure to produce rut under Vehicle Load and to pass its work-ing life of shear at high temperature deformation effect and the use properties gather around bag, therefore, for the pouring asphalt concrete of antiseepage, can not be directly used in deck paving.
Because bridge deck pavement structure is thin, the thermal conductivity of steel is good, bituminous concrete for paving steel bridge deck must bear the temperature higher than plain asphalt road surface, requiring high-temperature behavior probe temperature is 70 ℃, than 60 ℃ high 10 ℃ of the high-temperature behavior probe temperatures on asphalt concrete road surface, as the material of deck paving, must have than the better high temperature resistant property requirement in asphalt concrete road surface.On the other hand, for meeting not just can flow the voluntarily workability of closely knit moulding of steamroller of pouring asphalt concrete, far above asphalt concrete, (asphalt concrete bitumen aggregate ratio is generally 4.5 ~ 5.5% to its asphalt content, pouring asphalt concrete 8% left and right), and the increase of asphalt content, the high-temperature stability of its asphalt is declined, under hot conditions, easy softening generation rut and shearing are pushed and are gathered around bag, this and 70 ℃ of high-temperature behaviors require serious contradiction, for making pouring asphalt concrete both meet construction mobility, there is again good high-temperature stability, meet the requirement of anti-rut index under 70 ℃ of conditions, the pouring asphalt concrete of preparation paving steel bridge deck must adopt the modifying asphalt of more complicated formula just can meet the demands, this becomes pouring asphalt concrete as difficult point and the key problem in technology of deck paving.
Summary of the invention
For the high-temperature stability of pouring asphalt concrete in background technology and the contradictory problems of construction mobility, the present invention proposes and a kind ofly can meet construction mobility and can meet again high temperature resistant property requirement, modifying asphalt for the preparation of pouring asphalt concrete deck paving, its scheme is: comprise the paving steel bridge deck pouring asphalt concrete being made by modifying asphalt and macadam-aggregate mix, it is characterized in that: the composition of described modifying asphalt and the content of various compositions are respectively: matrix pitch 70%, modifying waste plastic agent 6%, SBS properties-correcting agent 5% and lake pitch 19%.
In this formula, matrix pitch content is higher, and while having guaranteed construction, bituminous concrete can possess good mobility, thereby makes bituminous concrete can obtain good degree of compactness and water-repellancy just not rolling under condition; SBS properties-correcting agent and lake pitch are conventional asphalt modification additive, and its effect is to improve bituminous concrete viscosity and high-temperature behavior.Core innovative point of the present invention is to have added modifying waste plastic agent in the formula that adds SBS properties-correcting agent and lake pitch, its effect is can significantly improve the high-temperature behavior of pitch and the viscosity that do not increase pitch, make the pouring asphalt concrete high-temperature behavior of its preparation meet the high temperature requirement of deck paving, meet the requirement of construction mobility simultaneously.
Preferably, described modifying waste plastic agent is obtained after pulverization process by plastics.
Preferably, described modifying asphalt mixes with the ratio of 8:92 with macadam-aggregate mix, obtains paving steel bridge deck pouring asphalt concrete.
Useful technique effect of the present invention is:
According to operational requirement and the method for < < asphalt highway job specifications > > (JTJ F40-2004) and < < highway engineering pitch and Asphalt Mixture Experiment rules > > (JTJ052-2000), modifying asphalt of the present invention is carried out to performance test, its penetration degree is less than 50(0.1mm), softening temperature reaches more than 80 ~ 85 ℃.
With this modifying asphalt, mix the pouring asphalt concrete (bitumen aggregate ratio 8% left and right) of mixing with the macadam-aggregate mix of certain grating, dynamic stability under 70 ℃ of conditions reaches 1000 ~ 1200 times/mm, pile penetration is less than 400(0.01mm), and under identical test method and test conditions, the dynamic stability of the pouring asphalt concrete of admixture modifying waste plastic agent is not 600 ~ 800 times/mm, and pile penetration is greater than 450(0.01mm).
The dynamic stability of the deck installation structure that the pouring asphalt concrete of admixture modifying waste plastic agent and SMA surface layer form under 70 ℃ of conditions reach 2000 times/more than mm, and the pouring asphalt concrete of admixture modifying waste plastic agent is not less than 1500 times/mm with the dynamic stability of identical SMA modified asphalt concrete surface layer composite structure, the structure properties requirement that the high-temperature behavior of the pouring asphalt concrete deck paving composite structure of admixture modifying waste plastic agent and workability meet pouring asphalt concrete deck paving completely and the high-temperature stability requirement under 70 ℃ of conditions, fully demonstrated modifying waste plastic agent to improving the high-temperature stability of pouring asphalt concrete deck paving and the special-effect of construction mobility.
SBS is conventional asphalt modifier, the consumption that increases SBS and lake pitch also can reach the requirement that improves pouring asphalt concrete high-temperature stability, but the ratio of SBS and lake pitch increases and will the viscosity of pitch be increased greatly, make the mobility of pouring asphalt concrete can not meet construction requirement, SBS price is higher simultaneously, and larger addition will increase construction costs.And the advantage of adding the pouring asphalt concrete of modifying waste plastic agent is can improve significantly high-temperature stability and the pile penetration of pouring asphalt concrete and don't the viscosity of pitch is increased, the high-temperature stability that can simultaneously meet as deck paving road surface requires and the requirement of construction mobility, convenient construction, cost is lower than the pouring asphalt concrete of other method preparation, energy-saving and cost-reducing, save engineering cost.
Embodiment
A kind of pouring asphalt concrete bridge deck pavement material with modifying waste plastic agent preparation, comprise the paving steel bridge deck pouring asphalt concrete being made by modifying asphalt and macadam-aggregate mix, it is characterized in that: the composition of described modifying asphalt and the content of various compositions are respectively: matrix pitch 70%, modifying waste plastic agent 6%, SBS properties-correcting agent 5% and lake pitch 19%.
Further, described modifying waste plastic agent is obtained after pulverization process by plastics.
Further, described modifying asphalt mixes with the ratio of 8:92 with macadam-aggregate mix, obtains paving steel bridge deck pouring asphalt concrete.
The pouring asphalt concrete making with modifying asphalt of the present invention, the construction technology when paving steel bridge deck is identical with the construction technology of common pouring asphalt concrete.
Claims (3)
1. the pouring asphalt concrete bridge deck pavement material with modifying waste plastic agent preparation, comprise the paving steel bridge deck pouring asphalt concrete being made by modifying asphalt and macadam-aggregate mix, it is characterized in that: the composition of described modifying asphalt and the content of various compositions are respectively: matrix pitch 70%, modifying waste plastic agent 6%, SBS properties-correcting agent 5% and lake pitch 19%.
2. the pouring asphalt concrete bridge deck pavement material with modifying waste plastic agent preparation according to claim 1, is characterized in that: described modifying waste plastic agent is obtained after pulverization process by plastics.
3. the pouring asphalt concrete bridge deck pavement material that use modifying waste plastic according to claim 1 agent is prepared, it is characterized in that: described modifying asphalt mixes with the ratio of 8:92 with macadam-aggregate mix, obtains paving steel bridge deck pouring asphalt concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310601387.1A CN103613327A (en) | 2013-11-25 | 2013-11-25 | Pouring type bituminous concrete bridge deck pavement material prepared by using waste plastic modifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310601387.1A CN103613327A (en) | 2013-11-25 | 2013-11-25 | Pouring type bituminous concrete bridge deck pavement material prepared by using waste plastic modifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103613327A true CN103613327A (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310601387.1A Pending CN103613327A (en) | 2013-11-25 | 2013-11-25 | Pouring type bituminous concrete bridge deck pavement material prepared by using waste plastic modifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103613327A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225237A (en) * | 2008-01-25 | 2008-07-23 | 杨锡武 | Method for preparing modified asphalt by using waste plastics |
| CN101913801A (en) * | 2010-07-26 | 2010-12-15 | 东南大学 | Cast asphalt concrete material and preparation method thereof |
-
2013
- 2013-11-25 CN CN201310601387.1A patent/CN103613327A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225237A (en) * | 2008-01-25 | 2008-07-23 | 杨锡武 | Method for preparing modified asphalt by using waste plastics |
| CN101913801A (en) * | 2010-07-26 | 2010-12-15 | 东南大学 | Cast asphalt concrete material and preparation method thereof |
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Application publication date: 20140305 |