CN105675170A - Method for determining compaction temperature in rock asphalt dry process construction - Google Patents
Method for determining compaction temperature in rock asphalt dry process construction Download PDFInfo
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- CN105675170A CN105675170A CN201610090786.XA CN201610090786A CN105675170A CN 105675170 A CN105675170 A CN 105675170A CN 201610090786 A CN201610090786 A CN 201610090786A CN 105675170 A CN105675170 A CN 105675170A
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- asphalt
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- 239000010426 asphalt Substances 0.000 title claims abstract description 133
- 239000011435 rock Substances 0.000 title claims abstract description 89
- 238000010276 construction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000001035 drying Methods 0.000 title claims abstract description 31
- 238000005056 compaction Methods 0.000 title abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 13
- 239000011159 matrix material Substances 0.000 claims description 10
- 238000004090 dissolution Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 4
- 239000011707 mineral Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 11
- 239000011521 glass Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Road Paving Structures (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
The invention disclosed a method for determining the compaction temperature in rock asphalt dry process construction, and the method mainly comprise a method for determining the construction compaction temperature through testing during the rock asphalt dry process construction. The method mainly comprises two parts: determining the compaction temperature through the direct testing of a mixing amount of rock asphalt when the mixing amount of the rock asphalt in modified asphalt is less than 30%; giving consideration to the impact from mineral substances in the rock asphalt when the actual mixing amount is greater than 30%, and deducing the construction compaction temperature according to the compaction temperature law in the state of a low amount of rock asphalt. The method can scientifically determine the compaction temperature in rock asphalt dry process construction, provides an effective scientific basis for the determining of the on-site construction compaction temperature, further improves the road surface compaction effect, and improves the quality of a bituminous pavement formed through rock asphalt dry process construction.
Description
Technical field
The present invention relates to pavement construction technical field, in particular to the defining method of temperature parameter in a kind of rock asphalt dry process construction process.
Background technology
In road engineering, the pitch of application mainly contains Xinjiang rock asphalt, blue or green river rock asphalt, Indonesia's BUTON rock asphalt, Iran rock asphalt and Gilsonite rock asphalt etc. Rock asphalt is the bitumen that oil generates through the comprehensive action of nature in rock crack, it is made up of pitch and mineral substance, pitch composition in rock asphalt can be dissolved in pitch under the high temperature conditions, the development and application of this material in asphalt roads engineering, in order to improve the performance on road surface.
The construction technology of rock asphalt is mainly divided into wet processing and dry process. Wet processing be by rock asphalt and matrix pitch evenly miscible (through grinding or shear history) make processes of rock asphalt modified asphalt after for the production of the technique of asphalt, the compacting temperature in its construction process can be determined according to table 5.2.2-1 in JTGF40-2004 or the regulation in JT/T860.5-2014 table 3.
Dry process be rock asphalt without link miscible with matrix pitch, directly drop into pitch and mix and stir in pot, stir together with gathering materials, then mix and stir the technique forming asphalt with pitch; This technique does not have national regulation or industry standard that construction temperature carries out special regulation or instruction at present, is generally carry out pavement compaction with the compacting temperature of matrix pitch compound during site operation. But, in dry process construction process, also there is certain difference in the time required for difference according to shipment distance and the difference of site operation ability, in no special situation, from mixing and stirring transport, pave, roll to compound, the required time at 2 hours, within this period, pitch composition in rock asphalt has in the matrix pitch being partially dissolved in asphalt so that asphalt also exists rock asphalt modification to a certain degree; Owing to the bituminous matter volume in rock asphalt is higher, with matrix pitch miscible after, carrying out pavement compaction according to the compacting standard of matrix pitch stiffness and the compacting temperature of asphalt can be significantly improved, and the compacting temperature of matrix pitch site operation is on the low side, if can reduce consolidation effect merely.
Summary of the invention
The technical issues that need to address of the present invention are to provide the defining method of compacting temperature in a kind of rock asphalt dry process construction process, for the confirmation of site operation compacting temperature proposes effective scientific basis, improve field compaction effect further, ensure Pavement Performance.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
The defining method of rock asphalt dry process construction compacting temperature, specifically comprises the following steps:
The dissolution process of rock asphalt in pitch when A. being constructed by test simulation dry process, it is determined that temperature-viscosity curve, determines the compacting temperature of the processes of rock asphalt modified asphalt of practice of construction volume under this state with corresponding temperature during 0.28Pa s ± 0.03Pa s;
If time in B. constructing more than 30% volume rock asphalt, in the scope that rock asphalt volume is 0～30%, choose the rock asphalt of 4～6 groups of different rock asphalt volumes, the dissolution process of rock asphalt in pitch when simulation dry process is constructed and the modifying asphalt that obtains, determine its compacting temperature respectively, draw volume-compacting temperature curve, and its correlationship is carried out matching, concrete compacting temperature scope according to volume-compacting temperature curve and fit correlation thereof, in presumption rock asphalt dry process construction process.
The defining method of compacting temperature in the construction of above-mentioned rock asphalt dry process, steps A specifically comprises the following steps:
A1. choosing rock asphalt and the matrix pitch mixing and stirring of actual volume in construction, in 165 DEG C of baking ovens, constant temperature keeps 2h, makes the modifying asphalt of rock asphalt;
A2. get this modifying asphalt and carry out 135 DEG C and 175 DEG C of viscosity tests respectively, draw temperature-viscosity curve according to test-results;
A3. according to temperature-viscosity curve, to get pitch apparent viscosity be temperature during (0.28 ± 0.03) Pa s is the compacting temperature scope of modifying asphalt.
The defining method of compacting temperature in the construction of above-mentioned rock asphalt dry process, step B specifically comprises the following steps:
B1., in the scope that rock asphalt volume is 0～30%, the modifying asphalt of 6 groups of different rock asphalt volumes is prepared;
B2. get modifying asphalt one to modifying asphalt six and carry out 135 DEG C and 175 DEG C of viscosity tests respectively, draw temperature-viscosity curve according to test-results;
B3. according to temperature-viscosity curve, to get pitch apparent viscosity be temperature during (0.28 ± 0.03) Pa s is the compacting temperature of modifying asphalt, and draws the volume-compacting temperature curve under different rock asphalt volume state;
B4. the compacting temperature in volume-compacting temperature curve is returned, obtain regression formula;
B5. the compacting temperature of dry process construction under rock asphalt high additive state is determined according to regression formula.
Owing to have employed above technical scheme, the invention technological progress is as follows.
The present invention can the compacting temperature of determination rock asphalt dry process construction of science, for the confirmation of site operation compacting temperature proposes effective scientific basis, further increase road surface compaction effect, it is to increase the bituminous pavement quality of rock asphalt dry process construction.
Accompanying drawing explanation
Fig. 1 is the volume-compacting temperature graphic representation of different rock asphalt in the specific embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
The defining method of compacting temperature in the construction of a kind of rock asphalt dry process, mainly comprise the defining method being obtained construction compacting temperature when rock asphalt dry process is constructed by test, the method mainly comprises two parts, namely when in modifying asphalt, rock asphalt volume is lower than 30%, the direct rock asphalt to construction volume can be adopted to carry out test determine, when actual volume is higher than 30%, consider the impact of contained mineral substance in rock asphalt composition, construction compacting temperature can be estimated according to the compacting temperature curve under rock asphalt low-dosage state.
Below for A-70 pitch, illustrate in practice of construction process, the detailed step that modifying asphalt compacting temperature is determined.
A., in practice of construction, the actual volume of rock asphalt, when 0～30%, determines compacting temperature according to following step.
A1. choosing rock asphalt and the matrix pitch mixing and stirring of actual volume in construction, in 165 DEG C of baking ovens, constant temperature keeps 2h, makes the modifying asphalt of rock asphalt.
A2. get this modifying asphalt and carry out 135 DEG C and 175 DEG C of viscosity tests respectively, draw temperature-viscosity curve according to test-results.
A3. according to temperature-viscosity curve, to get pitch apparent viscosity be temperature during (0.28 ± 0.03) Pa s is the compacting temperature scope of modifying asphalt.
B., in practice of construction, when the actual volume of rock asphalt is higher than 30%, compacting temperature is determined according to following step.
B1., in the scope that rock asphalt volume is 0～30%, the modifying asphalt of 6 groups of different rock asphalt volumes is prepared.
Get A-70 pitch 1kg, it is heated to 165 DEG C, mix the rock asphalt of 5%, i.e. 50g, stir after evenly with glass stick and put into 165 DEG C of baking oven constant temperature 2 hours, make modifying asphalt one.
Get A-70 pitch 1kg, it is heated to 165 DEG C, mix the rock asphalt of 10%, i.e. 100g, stir after evenly with glass stick and put into 165 DEG C of baking oven constant temperature 2 hours, make modifying asphalt two.
Get A-70 pitch 1kg, it is heated to 165 DEG C, mix the rock asphalt of 15%, i.e. 150g, stir after evenly with glass stick and put into 165 DEG C of baking oven constant temperature 2 hours, make modifying asphalt three.
Get A-70 pitch 1kg, it is heated to 165 DEG C, mix the rock asphalt of 20%, i.e. 200g, stir after evenly with glass stick and put into 165 DEG C of baking oven constant temperature 2 hours, make modifying asphalt four.
Get A-70 pitch 1kg, it is heated to 165 DEG C, mix the rock asphalt of 25%, i.e. 250g, stir after evenly with glass stick and put into 165 DEG C of baking oven constant temperature 2 hours, make modifying asphalt five.
Get A-70 pitch 1kg, it is heated to 165 DEG C, mix the rock asphalt of 30%, i.e. 300g, stir after evenly with glass stick and put into 165 DEG C of baking oven constant temperature 2 hours, make modifying asphalt six.
B2. get modifying asphalt one to modifying asphalt six and carry out 135 DEG C and 175 DEG C of viscosity tests respectively, draw temperature-viscosity curve according to test-results.
B3. according to temperature-viscosity curve, to get pitch apparent viscosity be temperature during (0.28 ± 0.03) Pa s is the compacting temperature of modifying asphalt, and draws the compacting temperature curve under different rock asphalt volume state. In the present embodiment, the compacting temperature scope obtaining modifying asphalt one to modifying asphalt six from temperature-viscosity curve is respectively: 146～155 DEG C, 151～160 DEG C, 155～164 DEG C, 158～167 DEG C, 160～169 DEG C, 162～171 DEG C, the volume drawn accordingly-compacting temperature curve is as shown in Figure 1, in figure, trilateral forms curve is volume-compacting temperature lower limit curve, and it is volume-compacting temperature upper limit curve that grid forms curve.
B4. be obtain under the low-dosage state being 0～30% at volume due to the drafting of volume-compacting temperature curve, therefore for rock asphalt volume in practice of construction process lower than 30% low-dosage modifying asphalt can directly obtain the concrete compacting temperature in rock asphalt dry process construction process according to volume-compacting temperature curve. And when rock asphalt volume is more than 30%, the mineral substance existed in rock asphalt is easily suspended in pitch, viscosity result being impacted, now returned by the compacting temperature in volume-compacting temperature curve, obtaining regression formula is:
Tmax=8.5112ln (a)+141.47
Formula one
Tmin=9.0106ln (a)+130.95 formula two
In formula: TmaxFor the compacting temperature upper limit, TminFor compacting temperature lower limit, a is rock asphalt volume.
B5. the compacting temperature of dry process construction under rock asphalt high additive state is determined according to regression formula.
Claims (3)
1. the defining method of rock asphalt dry process construction compacting temperature, it is characterised in that, specifically comprise the following steps:
A. by the test simulation dry process construction dissolution process of rock asphalt in pitch, it is determined that temperature-viscosity curve, the compacting temperature of the processes of rock asphalt modified asphalt of practice of construction volume under this state is determined with corresponding temperature during 0.28Pa s ± 0.03Pa s;
If time in B. constructing more than 30% volume rock asphalt, in the scope that rock asphalt volume is 0 ~ 30%, choose the rock asphalt of 4 ~ 6 groups of different rock asphalt volumes, the dissolution process of rock asphalt in pitch when simulation dry process is constructed and the modifying asphalt that obtains, determine its compacting temperature respectively, draw volume-compacting temperature curve, and its correlationship is carried out matching, concrete compacting temperature scope according to volume-compacting temperature curve and fit correlation thereof, in presumption rock asphalt dry process construction process.
2. the defining method of rock asphalt dry process according to claim 1 construction compacting temperature, it is characterised in that, steps A specifically comprises the following steps:
A1. choosing rock asphalt and the matrix pitch mixing and stirring of actual volume in construction, in 165 DEG C of baking ovens, constant temperature keeps 2h, makes the modifying asphalt of rock asphalt;
A2. get this modifying asphalt and carry out 135 DEG C and 175 DEG C of viscosity tests respectively, draw temperature-viscosity curve according to test-results;
A3. according to temperature-viscosity curve, to get pitch apparent viscosity be temperature during (0.28 ± 0.03) Pa s is the compacting temperature scope of modifying asphalt.
3. the defining method of rock asphalt dry process according to claim 1 construction compacting temperature, it is characterised in that, step B specifically comprises the following steps:
B1., in the scope that rock asphalt volume is 0 ~ 30%, the modifying asphalt of 6 groups of different rock asphalt volumes is prepared;
B2. get modifying asphalt one to modifying asphalt six and carry out 135 DEG C and 175 DEG C of viscosity tests respectively, draw temperature-viscosity curve according to test-results;
B3. according to temperature-viscosity curve, to get pitch apparent viscosity be temperature during (0.28 ± 0.03) Pa s is the compacting temperature of modifying asphalt, and draws the volume-compacting temperature curve under different rock asphalt volume state;
B4. the compacting temperature in volume-compacting temperature curve is returned, obtain regression formula;
B5. the compacting temperature of dry process construction under rock asphalt high additive state is determined according to regression formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610090786.XA CN105675170B (en) | 2016-02-18 | 2016-02-18 | The determination method of kir dry process construction compacting temperature |
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| CN201610090786.XA CN105675170B (en) | 2016-02-18 | 2016-02-18 | The determination method of kir dry process construction compacting temperature |
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| CN105675170B CN105675170B (en) | 2017-12-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290108A (en) * | 2016-08-09 | 2017-01-04 | 上海海事大学 | Determine the improved method of polymer modified asphalt compound optimal compaction temperature |
| CN109444206A (en) * | 2018-11-26 | 2019-03-08 | 招商局重庆交通科研设计院有限公司 | Bituminous pavement quality determining method and device |
| CN109765258A (en) * | 2019-01-09 | 2019-05-17 | 上海公路桥梁（集团）有限公司 | The monitoring method of the compacting temperature of asphalt pavement |
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2016
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| US20070191514A1 (en) * | 2005-09-12 | 2007-08-16 | Reinke Gerald H | Bituminous paving composition and process for bituminous paving |
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Non-Patent Citations (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290108A (en) * | 2016-08-09 | 2017-01-04 | 上海海事大学 | Determine the improved method of polymer modified asphalt compound optimal compaction temperature |
| CN106290108B (en) * | 2016-08-09 | 2019-01-15 | 上海海事大学 | The improved method for determining polymer modified asphalt mixture optimal compaction temperature |
| CN109444206A (en) * | 2018-11-26 | 2019-03-08 | 招商局重庆交通科研设计院有限公司 | Bituminous pavement quality determining method and device |
| CN109765258A (en) * | 2019-01-09 | 2019-05-17 | 上海公路桥梁（集团）有限公司 | The monitoring method of the compacting temperature of asphalt pavement |
| CN109765258B (en) * | 2019-01-09 | 2021-07-23 | 上海公路桥梁（集团）有限公司 | Method for monitoring the compaction temperature of asphalt paving |
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| CN105675170B (en) | 2017-12-26 |
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