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Federal Highway Administration
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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
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Publication Number: FHWA-RD-02-016 Date: June 1999 |
Table 16. Effect of compaction
temperature on the mixture with
PG 58-28, diabase aggregate, and 1.25-percent hydrated lime.
Temperature, °C (Current Practice) |
Measured Air Voids, Percent |
Measured Effective Asphalt Binder Content, Percent by Volume |
Additional Asphalt Binder Content Needed To Obtain 4-Percent Air Voidsa | Amount of Smoke Produced (Blank = No Smoke) |
|||
---|---|---|---|---|---|---|---|
Mixing (145) |
Compaction (137) |
Percent by Volume | Percent by Mixture Mass | During Mixing |
During STOA |
||
145 | 157 | 3.7 | 9.1 | -0.3 | -0.1 | Medium | |
145 | 137 | 3.8 | 9.1 | -0.2 | -0.1 | ||
145 | 117 | 4.6 | 9.0 | 0.6 | 0.3 | ||
145 | 107 | 4.0 | 9.1 | 0.0 | 0.0 | ||
After the Outliers Are Removed | |||||||
145 | 157 | 3.4 | 9.2 | -0.6 | -0.3 | Medium | |
145 | 137 | 4.3 | 9.1 | 0.3 | 0.1 | ||
145 | 117 | 4.1 | 9.1 | 0.1 | 0.0 | ||
145 | 107 | 4.0 | 9.1 | 0.0 | 0.0 |
aAssumes that the additional asphalt binder will not change the amount of asphalt binder absorption or workability during compaction. A negative sign indicates that asphalt binder would have to be removed to obtain a 4.0-percent air-void level.
Table 17. Air voids for the mixtures
with diabase
aggregate and 1.25-percent hydrated lime.
Temperature, °C | Air Voids, Percent | |||||
Mixing | Compaction | Rep 1 | Rep 2 | Rep 3 | Rep 4 | Average |
---|---|---|---|---|---|---|
PG 58-28 | ||||||
145 | 157 | 4.7 * | 3.5 | 3.5 | 3.2 | 3.4 |
145 | 137 | 4.9 | 2.6 * | 4.2 | 3.8 | 4.3 |
145 | 117 | 5.0 | 6.0 * | 3.7 | 3.7 | 4.1 |
145 | 107 | 3.9 | 4.1 | 4.4 | 3.5 | 4.0 |
Novophalt (PG 76-22) | ||||||
166 | 179 | 4.3 | 4.3 | 4.1 | 3.7 | 4.1 |
166 | 159 | 4.6 * | 4.1 | 4.0 | 4.0 | 4.0 |
166 | 139 | 4.6 | 4.5 | 3.9 | 3.6 | 4.2 |
166 | 119 | 4.7 | 5.3 | 4.5 | 5.0 | 4.9 |
Styrelf (PG 82-22) | ||||||
163 | 177 | 3.1 | 3.4 | 4.3 | 4.0 | 3.7 |
163 | 157 | 3.9 | 3.5 | 3.3 | 4.0 | 3.7 |
163 | 137 | 4.8 | 4.7 | 4.5 | 4.6 | 4.6 |
163 | 117 | 5.2 | 5.3 | 4.6 | 5.0 | 5.0 |
* Outlier
Table 18. Effect of compaction
temperature on the mixture with
Novophalt (PG 76-22), diabase aggregate, and 1.25-percent
hydrated lime.
Temperature, °C (Current Practice) |
Measured Air
Voids, Percent |
Measured Effective Asphalt Binder Content, Percent by Volume |
Additional Asphalt Binder Content Needed To Obtain 4-Percent Air Voidsa |
Amount of Smoke Produced (Blank = No Smoke) |
|||
---|---|---|---|---|---|---|---|
Mixing (166) |
Compaction (159) |
Percent by Volume |
Percent by Mixture Mass |
During Mixing | During STOA |
||
166 | 179 | 4.1 | 9.1 | 0.2 | 0.1 | High | |
166 | 159 | 4.0 | 9.1 | 0.0 | 0.0 | ||
166 | 139 | 4.2 | 9.2 | 0.2 | 0.1 | ||
166 | 119 | 4.9 | 9.1 | 0.9 | 0.4 |
aAssumes that the additional asphalt binder will not change the
amount of asphalt binder absorption or workability
during compaction.
Table 19. Effect of compaction
temperature on the mixture with
Styrelf (PG 82-22), diabase aggregate, and 1.25-percent hydrated
lime.
Temperature, °C (Current Practice) |
Measured Air Voids, Percent |
Measured Effective Asphalt Binder Content, Percent by Volume |
Additional Asphalt Binder Content Needed To Obtain 4-Percent Air Voidsa | Amount of Smoke Produced (Blank = No Smoke) |
|||
---|---|---|---|---|---|---|---|
Mixing (163) |
Compaction (157) |
Percent by Volume | Percent by Mixture Mass | During Mixing |
During STOA |
||
163 | 177 | 3.7 | 9.0 | -0.3 | -0.1 | Low | |
163 | 157 | 3.7 | 9.0 | -0.3 | -0.1 | ||
163 | 137 | 4.6 | 9.1 | 0.6 | 0.3 | ||
163 | 117 | 5.0 | 9.1 | 1.0 | 0.5 |
aAssumes that the additional asphalt binder will not change the
amount of asphalt binder absorption or workability
during compaction.
Table 20. Effect of compaction
temperature on the mixture
with PG 58-28 and limestone aggregate.
Temperature, °C (Current Practice) |
Measured Air Voids, Percent |
Measured Effective Asphalt Binder Content, Percent by Volume |
Additional Asphalt Binder Content Needed To Obtain 4-Percent Air Voidsa | Amount of Smoke Produced (Blank = No Smoke) |
|||
---|---|---|---|---|---|---|---|
Mixing (145) |
Compaction (137) |
Percent by Volume | Percent by Mixture Mass | During Mixing |
During STOA |
||
145 | 157 | 3.5 | 10.5 | -0.5 | -0.2 | Medium | |
145 | 137 | 4.1 | 10.5 | 0.1 | 0.0 | ||
145 | 117 | 4.2 | 10.5 | 0.2 | 0.1 | ||
145 | 107 | 4.2 | 10.5 | 0.2 | 0.1 |
aAssumes that the additional asphalt binder will not change the amount of asphalt binder absorption or workability during compaction. A negative sign indicates that asphalt binder would have to be removed to obtain a 4.0-percent air-void level.
Table 21. Air voids for the mixtures with limestone aggregate.
Temperature, °C | Air Voids, Percent | |||||
---|---|---|---|---|---|---|
Mixing | Compaction | Rep 1 | Rep 2 | Rep 3 | Rep 4 | Average |
PG 58-28 | ||||||
145 | 157 | 4.6 * | 3.3 | 3.6 | 3.5 | 3.5 |
145 | 137 | 4.2 | 3.7 | 4.1 | 4.3 | 4.1 |
145 | 117 | 4.6 | 4.0 | 4.1 | 3.9 | 4.2 |
145 | 107 | 4.4 | 4.1 | 3.8 | 4.3 | 4.2 |
Novophalt (PG 76-22) | ||||||
166 | 179 | 3.5 * | 2.6 | 3.0 | 2.7 | 2.8 |
166 | 159 | 3.8 | 3.4 | 3.5 | 3.2 | 3.5 |
166 | 139 | 3.9 | 3.9 | 3.3 * | 4.1 | 4.0 |
166 | 119 | 4.6 | 4.3 | 4.4 | 4.1 | 4.4 |
Styrelf (PG 82-22) | ||||||
163 | 177 | 3.4 * | 2.9 | 2.9 | 3.0 | 2.9 |
163 | 157 | 4.1 * | 3.8 | 3.6 | 3.5 | 3.6 |
163 | 137 | 4.1 | 3.8 | 3.8 | 3.5 | 3.8 |
163 | 117 | 4.7 * | 4.3 | 4.2 | 4.1 | 4.2 |
* Outlier
Table 22. Effect of compaction
temperature on the mixture
with Novophalt (PG 76-22) and limestone aggregate.
Temperature, °C (Current Practice) |
Measured Air Voids, Percent |
Measured Effective Asphalt Binder Content, Percent by Volume |
Additional Asphalt Binder Content Needed To Obtain 4-Percent Air Voidsa | Amount of Smoke Produced (Blank = No Smoke) |
|||
---|---|---|---|---|---|---|---|
Mixing (145) |
Compaction (137) |
Percent by Volume | Percent by Mixture Mass | During Mixing |
During STOA |
||
145 | 179 | 2.8 | 10.5 | -1.2 | -0.6 | Medium | |
145 | 159 | 3.5 | 10.4 | -0.5 | 0.2 | ||
145 | 139 | 4.0 | 10.4 | 0.0 | 0.0 | ||
145 | 119 | 4.4 | 10.6 | 0.4 | 0.2 |
aAssumes that the additional asphalt binder will not change the
amount of asphalt binder absorption or workability during compaction.
A negative sign indicates that asphalt binder would have to be removed to obtain
a 4.0-percent air-void level.
Table 23. Effect of compaction
temperature on the mixture
with Styrelf (PG 82-22) and limestone aggregate.
Temperature, °C (Current Practice) |
Measured Air Voids, Percent |
Measured Effective Asphalt Binder Content, Percent by Volume |
Additional Asphalt Binder Content Needed To Obtain 4-Percent Air Voidsa | Amount of Smoke Produced (Blank = No Smoke) |
|||
---|---|---|---|---|---|---|---|
Mixing (145) |
Compaction (137) |
Percent by Volume | Percent by Mixture Mass | During Mixing |
During STOA |
||
145 | 177 | 2.9 | 10.6 | -1.1 | -0.5 | Medium | |
145 | 157 | 3.6 | 10.6 | -0.4 | -0.2 | ||
145 | 137 | 3.8 | 10.5 | -0.2 | -0.1 | ||
145 | 117 | 4.2 | 10.8 | 0.2 | 0.1 |
aAssumes that the additional asphalt binder will not change the amount of asphalt binder absorption or workability during compaction. A negative sign indicates that asphalt binder would have to be removed to obtain a 4.0-percent air-void level.
Table 24. Allowable compaction
temperature range
from the Superpave gyratory compactor.
Aggregate Blend | Allowable
Compaction Temperature Range Rounded to the Nearest 5°C |
||
---|---|---|---|
PG 58-28 (AC-10) |
PG 76-22 (Novophalt) |
PG 82-22 (Styrelf) |
|
Diabase No Lime |
125 - 145 (135 ±10) |
120 - 160 (140 ±20) |
145 - 165 (155 ±10) |
Diabase 1.25% Lime |
105 - 145 (125 ±20) |
140 - 160 (150 ±10) |
145 - 165 (155 ±10) |
Limestone | 105 - 145 (125 ±20) |
120 - 160 (140 ±20) |
115 - 165 (140 ±25) |
Table 25. Average compaction temperature.
Aggregate Blend |
Method | Average Compaction Temperature Rounded to the Nearest 5°C |
||
---|---|---|---|---|
PG 58-28 (AC-10) |
PG 76-22 (Novophalt) |
PG 82-22 (Styrelf) |
||
Diabase No Lime |
Gyratory |
135 | 140 | 155 |
Capillary Viscosity | 140 | 175 | 170 | |
Brookfield Viscosity | 140 | 190 | 185 | |
Mastic | 135 | 175 | 165 | |
Diabase 1.25% Lime |
Gyratory |
125 | 150 | 155 |
Capillary Viscosity | 140 | 175 | 170 | |
Brookfield Viscosity | 140 | 190 | 185 | |
Limestone | Gyratory | 125 | 140 | 140 |
Capillary Viscosity | 140 | 175 | 170 | |
Brookfield Viscosity |
140 |
190 |
185 |
Table 26. Allowable compaction
temperature range from
the Superpave gyratory compactor and the asphalt binders
at viscosities of 250 and 310 mm2/s (280 ±30 mm2/s).
Aggregate | Method | Allowable Temperature Range, °C | ||
---|---|---|---|---|
PG 58-28 (AC-10) |
PG 76-22 (Novophalt) |
PG 82-22 (Styrelf) |
||
Diabase No Lime |
Gyratory | 125 - 145 | 120 - 160 | 145 - 165 |
Diabase 1.25% Lime |
Gyratory | 105 - 145 | 140 - 160 | 145 - 165 |
Limestone | Gyratory | 105 - 145 | 120 - 160 | 115 - 165 |
All Blends | Gyratory | 125 - 145 | 140 - 160 | 145 - 165 |
Capillary Viscosity | 135 - 140 | 170 - 175 | 170 - 175 | |
Brookfield Viscosity | 135 - 140 | 185 - 190 | 185 - 190 |
Table 27. Viscosity range corresponding to the compaction
temperature range from the Superpave gyratory compactor.
Aggregate | Method | Asphalt Binder | ||
---|---|---|---|---|
PG 58-28 (AC-10) |
PG 76-22 (Novophalt) |
PG 82-22 (Styrelf) |
||
Diabase No Lime |
Gyratory, °C | 125 - 145 | 120 - 160 | 145 - 165 |
Capillary Viscosity, mm2/s | 550 - 200 | 5500 - 650 | 1350 - 450 | |
Brookfield Viscosity, mm2/s | 550 - 200 | 8100 - 900 | 1250 - 500 | |
Diabase 1.25% Lime |
Gyratory,
°C |
105 -
145 |
140 - 160 | 145 - 165 |
Capillary Viscosity, mm2/s | 1900 - 200 | 1700 - 650 | 1350 - 450 | |
Brookfield Viscosity, mm2/s | 950 - 200 | 3500 - 900 | 1250 - 500 | |
Limestone | Gyratory,
°C |
105 -
145 |
120 -
160 |
115 - 165 |
Capillary Viscosity, mm2/s | 1900 - 200 | 5500 - 650 | 11000 - 450 | |
Brookfield Viscosity, mm2/s | 950 - 200 | 8100 - 900 | 4600 - 500 | |
All Blends | Brookfield
Viscosity Range Applicable to All Aggregate Blends, mm2/s |
550
- 200 (950 - 200) |
3500 - 900 | 1250 - 500 |