CN1241978C - Additive used for drain type asphalt paving material mixture - Google Patents
Additive used for drain type asphalt paving material mixture Download PDFInfo
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- CN1241978C CN1241978C CNB001249304A CN00124930A CN1241978C CN 1241978 C CN1241978 C CN 1241978C CN B001249304 A CNB001249304 A CN B001249304A CN 00124930 A CN00124930 A CN 00124930A CN 1241978 C CN1241978 C CN 1241978C
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Abstract
An additive for drainage mixes comprises hydrated lime. In one specific embodiment, the additive is hydrated lime of 80-100% Ca(OH)2 and has particle size distribution of 0.05-300 mum. In one preferred embodiment, the hydrated lime has a purity of around 80-100% Ca(OH)2, and a particle size distribution of around 8-12% in the range of 0.05-0.5 mum, 73-90% in the range of 0.5-75 mum and 0.5-7% in the range of 76-300 mum. According to another aspect, an improved drainage mix is provided containing aggregates, binders and hydrated lime.
Description
The present invention relates to produce the material of asphalt paving material, especially, the present invention relates to prepare asphalt paving material and using method thereof with good drainage.
The asphalt paving material mixture that generally is used for road surface pavement comprises three kinds of main ingredients: mineral aggregation, bituminous cement and filler.Aggregation be generally can be by the 20mm sieve aperture metaling, filler is a granularity less than 70 microns particulate matter, is used to be filled in the space between the metaling aggregation.Pitch is used for metaling and filler are bonded together.In recent years, polymkeric substance or broken tire powder had been begun in some dense mixtures, to add.These components mix the pavior that forms the about 3-7% of voidage.These mixing materials are generally the dense mixture that the crowd knows.
Prior art has used slaked lime as mineral filler and antistripping agent in densification mixing pavior.Peel off and be meant and in moisture, lose structural performance.In the prior art, the article that (1984) are entitled as " using slaked lime in the bituminous pavement road material mixture " has published in lime association of country (The National Lime Association), and Kennedy has discussed and peeled off mechanism and proposed treatment process in this article.These methods comprise: by suitable few air void that compresses, prevent that with this moisture from infiltrating mixture; Obtain suitable drainage by pavior suitably being promoted the surperficial moisture content of removing rapidly in the pavior in water surface, or use and handle material to prevent the moisture infiltration.Using slaked lime is one of effective means of handling aggregation.Slaked lime is by with calcium in the aggregation and silicon bonding, and improves moisture resistance by the acidic moiety in the pitch possible interaction or modification.When aggregation has earth or surface of clay coating, pozzolanic reaction will take place and generate Calucium Silicate powder in calcium in the slaked lime and the silicon in the clay under some situation.Prior art report, using the air void rate is that 7% mixture is tested, the result shows that when slaked lime is applied directly to asphalt mixture slaked lime is the most effective means of improving the asphalt mixture moisture resistance.
Another kind of asphalt pavement material is the mixture with drainage.The key distinction between drain type mixture and the dense mixture is the difference of voidage, and the voidage of drain type mixture is higher, generally reaches 15-25%.This can be by using metaling, polymer modified asphalt binding agent (as Cariphalte), the minimizing of being with corner angle or removing tiny gathering component and realize from mixture.Because high voidage allows water or sewage directly by the structure of pavior, therefore, can improve the draining situation under the wet weather in the drain type pavior.Further be, owing to there is the shock absorption of pressure dome can reduce the sound pollution of road surrounding environment.Therefore this kind mixture is particularly suitable for the thickly populated city that the noise of wet weather or road impacts environment.Yet high voidage also causes the drain type pavior to be easy to be destroyed by moisture, causes wearing quality not long.
Fig. 1 is a schema of commonly using preparation slaked lime method.
Be respectively the particle size dispersion figure of A-C class hydrated lime particle shown in Fig. 2 A-C.
Fig. 3 A and B are pavior prepared in accordance with the present invention and the conventional rut test result that contains (Cariphalte) (Fig. 3 A) drain type mixture or conventional 60/70 grade of binding agent (figure B).
One aspect of the present invention has provided a kind of additive that comprises slaked lime that is used for the drain type mixture.In one embodiment of the present of invention, additive is that purity is 80-100%Ca (OH)
2Slaked lime, its particle size dispersion is the 0.05-300 micron.In a preferred embodiment, the Ca of slaked lime (OH)
2Purity is 80-100%, and particle size dispersion is that wherein the granularity of 8-12% is the 0.05-0.5 micron, and the granularity 0.5-75 micron of 73-90% and the granularity of 0.5-7% are the 76-300 micron.In preferred embodiment, the Ca of slaked lime (OH)
2Purity is about 90-98%, and size-grade distribution is that the granularity of 8-12% is the 0.05-0.5 micron, and the granularity of 85-90% is that the granularity of 0.5-75 micron and 1-3% is the 76-300 micron.
According to another aspect of the present invention, provide a kind of improved drain type mixture that includes aggregation, binding agent and slaked lime.Binding agent can be (as standard) polymer modification or unmodified binding agent.The example of the binding agent of standard is the binding agent as regular grade 60/70 or 80/100.The example of polymer modification binding agent is Carphalte.Make the voidage of drain type mixture reach 15% at least by the amount of using corner angle mineral aggregation and/or minimizing aggregation, improved drain type mixture has improved wearing quality under the required drainage performance of maintenance.In described embodiment, improve mixture and comprise the slaked lime that accounts for dried aggregation and the heavily about 0.5-5% of binding agent, this slaked lime combines with standard aggregation and binder component.In a preferred embodiment, the slaked lime that accounts for the heavily about 1-3% of dried aggregation combines with aggregation and polymer modification binding agent.In a more preferred embodiment, comprise and account for dried aggregation to weigh 2% purity be the slaked lime Ca (OH) of 90-98%
2With 4-5% polymer modification binding agent.
According to a further aspect of the invention, dried slaked lime and wet niter mortar can be as additives.In addition, also can use the oxyhydroxide of other divalent cation to substitute slaked lime.Using method has a detailed description hereinafter.In brief, this method comprises the steps: mineral aggregation and binding agent are reconciled into mixture, and mixture is poured in the basic unit, and extruding mixture formation voidage is at least 15% drain type asphalt pavior.
Below enforcement the preferred embodiments of the present invention have been described in the detailed explanation.But those skilled in the art should be understood that following detailed description just is used to illustrate the present invention, and can not think limitation of the present invention.In addition, more employed terms are meant component or the material that some are special in following description and claims.Known to those skilled in the art, different companies can use different titles to same component.This paper component that title is different to function is identical is not done differentiation.In the narration below, reach the term of mentioning and " comprise " in claims, " comprising ", " having " and " containing " is open-ended term, therefore, is interpreted as " including but not limited to this ".
Fine and close asphalt pavement material used herein is meant that the target voidage is less than or equals 7%, and can not therefrom discharge the pavior of large quantity of moisture.The drain type asphalt pavior is meant that the target voidage is 15-25% and allows the pavior that water therefrom passes through.
Dense mixture is meant a kind of asphalt mixture that comprises following component, generates fine and close asphalt pavement material when these components are mixed in standard still formula or continuous hybrid technique and are routed to road surface.The drain type mixture is meant a kind of asphalt mixture that comprises following component, generates the drain type asphalt pavior when these components are mixed in standard still formula or continuous hybrid technique and are routed to road surface.
Voidage is pressure dome or the air void that exists in the pavior after moulding, and typical evaluation method is a volume density of measuring mixture, deducts the volume that aggregation and binding agent occupy then.Filler is meant and adds the fine powder material that is used for the air gas bag between the filling mineral aggregation in the mixture.
The wearing quality of material can be by the measurement Marshall stability, tensile strength, and elastic feel quantity and moisture-resistant gas are destructive to be determined.Comprise that by comparing the textural property of Texas (Texas) boiling experiment and rut (wheel tracking) experiment front and back changes the relative moisture-resistant gas destructiveness of estimating mixture in the simulation climate processing.Texas boiling experiment is a kind of direct-vision method that the bonding aggregation resists stripping property mutually of measuring.
If one or more experimental results show the mixture that added the slaked lime additive and improve to some extent than the wearing quality of the mixture that does not add the slaked lime additive, just think that the wearing quality of having added the slaked lime additive agent mixture improves.
Can use the standard method preparation to be used for the slaked lime of drain type mixture additive according to the present invention.On the other hand, C kind slaked lime is most preferred additive material.Various types of additives and preparation method thereof and the use in the drain type mixture are described below.
The preparation of slaked lime additive
Referring to Fig. 1, according to slaked lime of the present invention (Ca (OH)
2) additive can prepare according to standard slaked lime Technology.Typically, this technology comprises by lime kilning rock (CaCO
3) generate unslaked lime (CaO), then, unslaked lime is done or wet type aquation generation slaked lime Ca (OH)
2Further downstream process is to carry out size separation and deviate from these selectivity steps of impurity sometimes, represents with dotted line among the figure.One of downstream process method is to use air trap that coarse grain and particulate are separated.If implement this step, the fine powder material that obtains distributes according to its globule size and is called A, B or C class slaked lime.
Be respectively the special case of the particle size dispersion of three class slaked limes shown in Fig. 2 A-C.In the category-A slaked lime example shown in Fig. 2 A, particle size dispersion is in the relative narrower scope, and 100% hydrated lime particle is the 0.5-75 micron.Fig. 2 B is depicted as the example of category-B slaked lime, medium sized distribution, and about 93% hydrated lime particle is at the 0.5-75 micrometer range, and 6% hydrated lime particle is at the 0.05-0.5 micrometer range.Fig. 2 C is depicted as the example of C class slaked lime, and particle size distribution is very wide, has 88% to be positioned at the 0.5-75 micrometer range approximately, and 10% is positioned at 0.05-0.5 micrometer range and 1.5% is positioned at the 76-300 micrometer range.Table 1 is the general size range of three kinds of slaked limes.
Table 1
| Granular size (micron) | The category-A slaked lime | The category-B slaked lime | C class slaked lime |
| 0.05-0.5 | 0％ | 3-9％ | 8-12％ |
| 0.5-75 | 100％ | 85-95％ | 73-90％ |
| 76-300 | 0％ | 0-0.5％ | 0.5-7％ |
In order to implement the present invention, A, B and C class slaked lime reach without the wet pulp or the dried slaked lime powder of the slaked lime of screening can use excessively.Preferred concentration range for is the 0.5-5% that accounts for dried aggregation weight, and more preferably concentration range is the 1-3% that accounts for dried aggregation weight, and the most preferable concentrations scope is to account for 2% of dried aggregation weight.
Well-known in this field, slaked lime and asphalt mixture reaction generate waterproof layer.According to the present invention, when keeping the required drainage of drain type mixture, slaked lime can also be used to improving the wearing quality of drain type mixture.The result shows that (not shown) adds the structure properties that slaked lime does not have influence on the pavior that obtains in the drain type mixture.
Use slaked lime to improve the structural performance of drain type mixture
According to the present invention, the slaked lime that can add 0.5-5% in the drain type mixture is to improve one or more structure propertiess of final drain type pavior.In a preferred embodiment of the present invention, the addition of drain type mixture medium-slaking lime is 2%.In a preferred embodiment of the present invention, the addition of C class slaked lime is 2% in the drain type mixture.
Table 2 is the result of study of the Marshall stability of pavior prepared in accordance with the present invention.In these examples, account for the A of dried aggregation 2% (dry weight), B and C class slaked lime join in the mixture that contains 4.5% regular grade, 60/70 pitch or Cariphalte (polymer modification binding agent).Use 3 kinds of slaked limes all strengthened final drain type pavior Marshall stability, wherein C class slaked lime improve at most.
C class additive has also improved the about 15-17% of elastic feel quantity (result is not shown) of standard and polymer modification binding agent.
Table 2
| Drain type mixture type | Slaked lime additive types (2%) | Compare with the control group that does not have additive, the Marshall stability before weathering age is handled changes |
| The polymer modification binding agent | Category-A | +0.76kN(7.8％) |
| The polymer modification binding agent | Category-B | +2.15Kn(22.0％) |
| The polymer modification binding agent | The C class | 2.74KN(28.0％) |
| The standard binding agent | Category-A | 1.38KN(15.4％) |
| The standard binding agent | Category-B | 1.35KN(15.0％) |
| The standard binding agent | The C class | 2.77KN(30.8％) |
Use slaked lime to improve the wearing quality of drain type mixture
The 1-3% slaked lime joins in the drain type mixture and destroys wearing quality with the moisture-resistant that improves the drain type mixture.In a preferred embodiment, used 2% slaked lime.In most preferred embodiment, in the drain type mixture, added 2%C class slaked lime.
Carried out the laboratory simulation test to assess effect of the present invention.Before carrying out the test of Marshall stability and Young's modulus, all samples is handled through the weathering age in 120 cycles, and each weathering age processing cycle comprises 2 hours moisture times and 2 hours dry gas times.Table 3 is depicted as in the drain type mixture that contains 4.5% regular grade, 60/70 binding agent or polymer modification binding agent and adds A, the impact effect of Young's modulus behind B and the C class slaked lime.
Table 3
| The drain type mixture | The slaked lime additive types | Compare the elastic modulus change after weathering age is handled with the control group that does not have additive |
| The polymer modification binding agent | Do not have | -13.0％ |
| The polymer modification binding agent | The 2%A class | +11.1％ |
| The polymer modification binding agent | The 2%B class | +68.1％ |
| The polymer modification binding agent | The 2%C class | +76.9％ |
| The standard binding agent | Do not have | -1.1％ |
| The standard binding agent | The 2%A class | +88.3 |
| The standard binding agent | The 2%B class | +25.5％ |
| The standard binding agent | The 2%C class | +37.9％ |
After weathering age was handled, the Young's modulus that does not add the polymer modification binder mixtures of slaked lime significantly descended, and standard mixture is unaffected.Yet the adding of three types slaked lime has all significantly improved the Young's modulus of standard and polymer modification binding mixtures.The C class is the most effective to the polymer modification binding agent, and category-A is the most effective to the standard binding agent.Fig. 3 A and Fig. 3 B show that further anti-rut (rutting) property of standard binder mixtures has been improved to the level suitable with the polymer modification binding agent.Therefore, according to an aspect of the present invention, use the drain type mixture that contains the standard binding agent to prepare the drain type pavior suitable with polymer modification binding agent wearing quality.Because the price of slaked lime is lower than the price of polymkeric substance,, obtain drain type mixture with polymer modification binding agent same performance with lower preparation expense in an embodiment of the present invention by the standard binding agent is used the slaked lime additive.Further improve performance if desired, in commonly using the polymer modification mixture, add lime additive according to another embodiment of the invention and obtained the better drain type pavior of performance.
The test result (not shown) shows that Marshall stability is not subjected to obvious damage because of the weathering age treating processes.In addition, the rut shown in Fig. 3 A and 3B (WheelTracking) test result shows, uses three kinds of additives that the wearing quality of two kinds of draining mixtures is all had improvement.Found that category-B is best to standard binding mixtures effect, three kinds of additives do not have difference to the Effect on Performance of polymer modification binding agent.
Table 4 is depicted as and adds the 2%A class in same two kinds of drain type mixture, the Texas boiling test result behind category-B and the C class slaked lime.Use three kinds of slaked limes that binding agent coating performance is all had improvement.According to the appraisal procedure directly perceived of binding agent overlay residue percentage amounts, the boiling test has more significant effect to the larger particles aggregation.When not using slaked lime, the binding agent of the thick aggregation of tiny aggregation keeps effective.This impact effect of aggregation granular size weakens behind the use slaked lime.In three class slaked limes, the performance of C class slaked lime is best.
Table 4
| Types of binder in the mixture | The slaked lime additive types | Aggregation size (mm) | ||||
| 13.0 | 9.5 | 4.75 | 1.18 | All big or small | ||
| Polymer modification | Do not have | 80％ | 85％ | 85％ | 85％ | 100％ |
| Polymer modification | The 2%A class | 95％ | 95％ | 95％ | 98％ | 98％ |
| Polymer modification | The 2%B class | 95％ | 90％ | 95％ | 95％ | 98％ |
| Polymer modification | The 2%C class | 98％ | 95％ | 98％ | 98％ | 98％ |
| Standard G60/70 | Do not have | 70％ | 60％ | 85％ | 90％ | 95％ |
| Standard G60/70 | The 2%A class | 90％ | 90％ | 100％ | 100％ | 98％ |
| Standard G60/70 | The 2%B class | 100％ | 95％ | 95％ | 95％ | 98％ |
| Standard G60/70 | The 2%C class | 100％ | 100％ | 100％ | 100％ | 100％ |
Fig. 3 A and B are depicted as the comparing result that pavior prepared in accordance with the present invention and standard are mixed with rut (wheel tracking) test result of 4.5% regular grade, 60/70 binding agent (Fig. 3 B) or polymer modification binding agent (Fig. 3 A).The rut (wheel tracking) that does not add two kinds of drain type mixtures of slaked lime additive is all failed.The adding of any slaked lime all has improvement to the anti-rut of two kinds of draining mixtures.To two types of mixtures, use the slaked lime additive after the rut amount reduce half, and the mixture that contains the polymer modification binding agent does not significantly destroy after 5000 amounts of wheel through 6000 amounts of wheel and the mixture that contains the standard binding agent.Three types additive has identical effect to the mixture that is mixed with the polymer modification binding agent, and standard is cohered mixture, and the effect of B and C class slaked lime is better than the category-A slaked lime.
Slaked lime can add in the drain type mixture in many ways.The example of some nonrestrictive mixture methods is described below.
Example 1
(a) will have moisture or wet aggregation places on the premix platform.
What (b) dried slaked lime is joined undried also handles has in moisture or the wet aggregation.
(c) drying composite in drying machine.
(d) drying composite is put into the controllable hot hopper of size grading.
(e) aggregation of the aforementioned particle size of appropriate amount is put into still formula mixing tank.
(f) in still formula mixing tank, mix.
(g) in the remollescent binding agent, mix.
(h) mixture is toppled over aforementioned mill layer and go up and compress the mill layer to required degree.
Dried slaked lime joined have in moisture or the wet aggregation, in mixture, spray into a spot of water then, following steps with the step (c) of embodiment 1 to (h).
Embodiment 3
Spray less water on wet aggregation, add the slaked lime of doing then, following steps arrive (h) with the step (c) of embodiment 1.
Embodiment 4
Spray slaked lime slurries are to required concentration on wet aggregation, and following steps arrive (h) with the step (c) of embodiment 1.
Embodiment 5
(a) adds dried slaked lime in (f) step process dried aggregation afterwards in passing through standard drying process such as embodiment 1.Then the remollescent bituminous cement is joined in slaked lime-binder mixtures, arrive (h) as the step among the embodiment 1 (g).
Directly add the slaked lime of doing in the remollescent bituminous cement, the step (a) among following steps such as the embodiment 1 is to (h).
Embodiment 7
The unslaked lime powder is mixed with wet aggregation, spray less water then and make the abundant hydrogenation of unslaked lime.Following steps arrive (h) with the step among the embodiment 1 (a).
Should illustrate, when describing in conjunction with aforementioned slaked lime type and drain type mixture when of the present invention, the figure of lifting and result just for the present invention is described, and can not think limitation of the present invention.In addition, very clear, the method for the invention and material have effectiveness in the field that much needs the durable drain type mixture of use.Under the prerequisite that does not break away from the present invention's spirit and invention scope, use a kind of of the ordinary skill in the art just can make a lot of improvement and change to the present invention.For example, though used the examples of additives of slaked lime as the draining mixture,, other has the alkaline matter of divalent cation such as the oxyhydroxide of rhombspar and magnesium has same effect.According to the present invention, except that Cariphalte, the modified binder of other type also can join in the drain type mixture.Binding agent includes but not limited to this, gilsonite modified binder (gilsonite is purchased the Gilsonite company in the U.S.), synthetic or natural modified rubber binding agent, and the binding substances of aforementioned thing.Operable types of binder includes but not limited to this according to the present invention, the trade mark 40/50,60/70,80/100,120/150 and binding substances.According to the present invention, various types of modifications or standard binding agent can mix to improve the performance of drain type mixture and pavior with suitable mineral aggregation and slaked lime additive.
Claims (26)
1. additive that is used to improve drain type asphalt pavior mixture wearing quality that comprises slaked lime, wherein, described hydrated lime particle size distribution is the 0.05-300 micron.
2. additive according to claim 1, wherein said drain type asphalt pavior mixture comprises mineral aggregation and binding agent.
3. additive according to claim 2, wherein said binding agent are standard binding agent or modified binder.
4. additive according to claim 3, wherein said binding agent is standard brand 40/50 binding agent, standard brand 60/70 binding agent, standard brand 80/100 binding agent, standard brand 120/150 binding agent, rhombspar modified binder, synthetic rubber modified binder, the natural rubber modified binder, polymer modification binding agent or CARIPHALTE.
5. according to the described additive of above-mentioned arbitrary claim, wherein said slaked lime purity is 80-99%Ca (OH)
2
6. additive according to claim 5, the particle size distribution of wherein said slaked lime are the account for 8-12% of granularity at the 0.05-0.5 micrometer range, and granularity is at the 73-90% that accounts for of 0.5-75 micrometer range, and granularity is at the 0.5-7% that accounts for of 76-300 micrometer range.
7. additive according to claim 6, wherein said drain type asphalt pavior mixture are used to prepare voidage and are at least 15% asphalt pavement material.
8. be used to prepare the mixture of drain type asphalt pavior, described mixture comprises slaked lime, and wherein, described hydrated lime particle size distribution is the 0.05-300 micron.
9. mixture according to claim 8, wherein said mixture comprises at least 15% voidage.
10. according to Claim 8 or 9 described mixtures, wherein said slaked lime purity is 80-99%Ca (OH)
2
11. mixture according to claim 10, the particle size distribution of wherein said slaked lime is the account for 8-12% of granularity at the 0.05-0.5 micrometer range, granularity is at the 73-90% that accounts for of 0.5-75 micrometer range, and granularity is at the 0.5-7% that accounts for of 76-300 micrometer range.
12. be used to prepare the mixture of drain type asphalt pavior, this mixture comprises the mineral aggregation, binding agent and slaked lime, and wherein said hydrated lime particle size distribution is the 0.05-300 micron.
13. mixture according to claim 12, wherein said binding agent are standard binding agent or modified binder.
14. mixture according to claim 13, wherein said binding agent is standard brand 40/50 binding agent, standard brand 60/70 binding agent, standard brand 80/100 binding agent, standard brand 120/150 binding agent, rhombspar modified binder, synthetic rubber modified binder, the natural rubber modified binder, polymer modification binding agent or CARIPHALTE.
15. according to each described mixture of claim 12-14, wherein said mixture is the mixture that can be used to prepare the drain type asphalt pavior that comprises at least 15% voidage.
16. mixture according to claim 15, the consumption of wherein said binding agent are volume ratio 4-5%, described slaked lime consumption is weight ratio 1-3%, and all the other are the mineral aggregation.
17. mixture according to claim 16, wherein said slaked lime consumption is weight ratio 1.5-2.5%.
18. mixture according to claim 17, wherein said slaked lime purity is 80-98%.
19. mixture according to claim 18, the particle size distribution of wherein said slaked lime are the account for 8-12% of granularity at the 0.05-0.5 micrometer range, granularity is at the 73-90% that accounts for of 0.5-75 micrometer range, and granularity is at the 0.5-7% that accounts for of 76-300 micrometer range.
20. mixture according to claim 12, described binding agent are the polymer modification binding agent.
21. mixture according to claim 20, wherein said mixture can be used to prepare the drain type asphalt pavior that contains 15% voidage at least.
22. according to each described mixture of claim 20-21, wherein said binding agent consumption is volume ratio 4-5%, described slaked lime consumption is weight ratio 1-3%, and all the other are the mineral aggregation.
23. mixture according to claim 22, wherein said slaked lime consumption is weight ratio 1.5-2.5%.
24. mixture according to claim 23, described slaked lime purity is 80-98%.
25. mixture according to claim 24, the particle size distribution of described slaked lime are the account for 8-12% of granularity at the 0.05-0.5 micrometer range, granularity is at the 73-90% that accounts for of 0.5-75 micrometer range, and granularity is at the 0.5-7% that accounts for of 76-300 micrometer range.
26. prepare the method for drain type asphalt pavior, comprising: with slaked lime, mineral aggregation and binding agent mix; Described mixture is toppled in the basic unit; Extruding mixture forms the drain type asphalt pavior that contains at least 15% voidage, and wherein said hydrated lime particle size distribution is the 0.05-300 micron.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SG9905166A SG99291A1 (en) | 1999-10-14 | 1999-10-14 | Additive for drainage asphalt pavement mixture |
| SG9905166-6 | 1999-10-14 | ||
| SG99051666 | 1999-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1293217A CN1293217A (en) | 2001-05-02 |
| CN1241978C true CN1241978C (en) | 2006-02-15 |
Family
ID=20430447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001249304A Expired - Fee Related CN1241978C (en) | 1999-10-14 | 2000-09-25 | Additive used for drain type asphalt paving material mixture |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN1241978C (en) |
| HK (1) | HK1034727A1 (en) |
| MY (1) | MY121490A (en) |
| SG (1) | SG99291A1 (en) |
| TW (1) | TW500749B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648190A (en) * | 2020-04-25 | 2020-09-11 | 河南省金德园林绿化工程有限公司 | Asphalt concrete pavement and paving construction method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1267063A (en) * | 1968-07-02 | 1972-03-15 | ||
| GB2147908A (en) * | 1983-10-11 | 1985-05-22 | Maxwell R J | Bituminous surfacing material |
| US5389691A (en) * | 1993-09-07 | 1995-02-14 | Univ. Of Wyoming | Process for co-recycling tires and oils |
-
1999
- 1999-10-14 SG SG9905166A patent/SG99291A1/en unknown
-
2000
- 2000-09-06 TW TW089118227A patent/TW500749B/en active
- 2000-09-25 CN CNB001249304A patent/CN1241978C/en not_active Expired - Fee Related
- 2000-10-11 MY MYPI20004732A patent/MY121490A/en unknown
-
2001
- 2001-07-27 HK HK01105276A patent/HK1034727A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SG99291A1 (en) | 2003-10-27 |
| HK1034727A1 (en) | 2001-11-02 |
| TW500749B (en) | 2002-09-01 |
| MY121490A (en) | 2006-01-28 |
| CN1293217A (en) | 2001-05-02 |
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