CE411 EXAM 2
1. What are the consensus and source aggregate properties?
Answer - Coarse aggregate angularity
- Fine aggregate angularity
- Flat and elongated particles
- Clay content
2. Volumetric properties of HMA?
Answer - Air voids
- VMA (voids in mineral aggregate)
- voids filled
3. Gravimetric properties of HMA?
Answer - Density
- Bulk Specific Gravity
- Maximum Theoretical Specific Gravity
1/
21
,- Percent Compaction
4. Rolling Thin Film Oven (RTFO)
Answer Simulates Binder Aging
5. Pressure Aging Vessel (PAV)
Answer Simulates long term aging of binder
6. Dynamic Shear Rheometer
Answer - Measures binder properties at high/intermediate temperatures
- Rutting/Structural Cracking
7. Rotational Viscometer (RV)
Answer - Measures binder properties at high temperatures
- Flow
8. Bending Beam Rheometer (BBR)
Answer - Measures binder properties at low temperatures
- low temperature cracking
9. Direct Tension Tester
2/
21
, Answer - Measures properties at low temperatures
- Low temperature cracking
10. 3 Stages of binders life cycle?
Answer - transport, storage, handling
- mix production/construction
- binder aging over time
11. Why was Superpave developed?
Answer Addresses the three principal distresses of HMA
rutting, fatigue, and low temp cracking.
12. QAF
Answer Quality adjustment factor
used to asses HMA production quality and applied to calculate quality pavement adjustment
13. What is the anticipated volume of voids in HMA?
Answer Between 3%-8% (Relative density 92%-97%)
14. RAP
3/
21
1. What are the consensus and source aggregate properties?
Answer - Coarse aggregate angularity
- Fine aggregate angularity
- Flat and elongated particles
- Clay content
2. Volumetric properties of HMA?
Answer - Air voids
- VMA (voids in mineral aggregate)
- voids filled
3. Gravimetric properties of HMA?
Answer - Density
- Bulk Specific Gravity
- Maximum Theoretical Specific Gravity
1/
21
,- Percent Compaction
4. Rolling Thin Film Oven (RTFO)
Answer Simulates Binder Aging
5. Pressure Aging Vessel (PAV)
Answer Simulates long term aging of binder
6. Dynamic Shear Rheometer
Answer - Measures binder properties at high/intermediate temperatures
- Rutting/Structural Cracking
7. Rotational Viscometer (RV)
Answer - Measures binder properties at high temperatures
- Flow
8. Bending Beam Rheometer (BBR)
Answer - Measures binder properties at low temperatures
- low temperature cracking
9. Direct Tension Tester
2/
21
, Answer - Measures properties at low temperatures
- Low temperature cracking
10. 3 Stages of binders life cycle?
Answer - transport, storage, handling
- mix production/construction
- binder aging over time
11. Why was Superpave developed?
Answer Addresses the three principal distresses of HMA
rutting, fatigue, and low temp cracking.
12. QAF
Answer Quality adjustment factor
used to asses HMA production quality and applied to calculate quality pavement adjustment
13. What is the anticipated volume of voids in HMA?
Answer Between 3%-8% (Relative density 92%-97%)
14. RAP
3/
21
