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Frontiers of Structural and Civil Engineering

ISSN 2095-2430

ISSN 2095-2449(Online)

CN 10-1023/X

邮发代号 80-968

2019 Impact Factor: 1.68

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Frontiers of Structural and Civil Engineering  2018, Vol. 12 Issue (4): 536-547   https://doi.org/10.1007/s11709-017-0451-5
  本期目录
Temperature segregation and its impact on the quality and performance of asphalt pavements
Minkyum KIM1(), Pranjal PHALTANE2, Louay N. MOHAMMAD1, Mostafa ELSEIFI2
1. Louisiana Transportation Research Center, Louisiana State University, LA 70808, USA
2. Department of Civil and Environmental Engineering, Louisiana State University, LA 70808, USA
 全文: PDF(994 KB)   HTML
Abstract：

Temperature segregation is non-uniform temperature distribution across the uncompacted asphalt mat during paving operations and may have detrimental effects on the quality and performance of asphalt pavements. However, many research studies conducted across the US have reported mixed observations regarding its effects on the initial quality and long-term performance of asphalt pavements. ?The objective of this study was to determine the effects of the temperature segregation on the density and mechanical properties of Louisiana asphalt mixtures. Seven asphalt rehabilitation projects across Louisiana were selected. A multi-sensor infrared bar (Pave-IR) system and a hand-held portable thermal camera were used to measure the temperature of asphalt mats. Field core samples were collected from various areas with varying severity levels of temperature segregation and tested for the density, fracture resistance (Jc) by semi-circular bending (SCB), rut depth by wheel tracking, and dynamic modulus (|E*|) by indirect tension (IDT) devices. ?Two distinctive patterns of non-uniform temperature distribution were observed: a cyclic and irregular temperature segregations. Laboratory test results showed that highly temperature segregated asphalt pavements (i.e., temperature differentials ≥ 41.7°C) can have significantly lower densities and the mechanical properties than the non-segregated area, especially when the temperature differentials are measured at compaction.
Key words： temperature segregation    temperature differential    pavement density    semi-circular bending    wheel tracking    dynamic modulus
收稿日期: 2017-03-03      出版日期: 2018-11-20
Corresponding Author(s): Minkyum KIM   
 引用本文:   
. [J]. Frontiers of Structural and Civil Engineering, 2018, 12(4): 536-547.
Minkyum KIM, Pranjal PHALTANE, Louay N. MOHAMMAD, Mostafa ELSEIFI. Temperature segregation and its impact on the quality and performance of asphalt pavements. Front. Struct. Civ. Eng., 2018, 12(4): 536-547.
 链接本文:  
https://academic.hep.com.cn/fsce/CN/10.1007/s11709-017-0451-5
https://academic.hep.com.cn/fsce/CN/Y2018/V12/I4/536
Phase route layer mix layer
thickness (mm)		 NMAS (mm) MTV target
temperature		 laboratory tests
VTM1 SCB2 LWT3 IDT|E*|4
Phase I LA30 WC HMA 50 12.5 ✓ 149°C ✓ ✓
LA1058 WC WMA 38 12.5 ✓ 135°C ✓
US 165 WC HMA 50 12.5 ✓ 149°C ✓ ✓
LA1053 BC HMA 50 19.0 ✓ 149°C ✓ ✓
Phase II LA1053 WC HMA 38 12.5 ✓ 149°C ✓ ✓
LA411 WC WMA 38 12.5 ✓ 143°C ✓ ✓
LA940 BC WMA 50 19.0 ✓ 143°C ✓ ✓ ✓
WC WMA 38 12.5 ✓ 143°C ✓
LA1 Shoulder WMA 100 19 143°C ✓ ✓ ✓ ✓
BC WMA 50 mm 19 ✓ 143°C ✓ ✓
Tab.1  
Fig.1  
temperature range segregation severity level TS group designation
(Target)±6.9°C none Target
(Target–13.9°C)±6.9°C low Target-25
(Target–27.8°C)±6.9°C medium Target-50
(Target–41.7°C)±6.9°C high Target-75
(Target–55.6°C)±6.9°C very high Target-100
Tab.2  
construction factor category number of mixtures number of 45 m segments average Std. deviation (°C) Tukey test grouping
MTV No 1 47 10.7 A
Light 1 30 9.2 B
Full 1 36 4.4 C
contractors A 1 51 3.3 A
B 1 69 2.7 A
C 1 84 3.3 A
D 1 90 3.9 A
NMAS 12.5-mm 6 >300 6.7 A
19-mm 3 230 7.8 B
target temp. 135°C 1 92 6.1 A
143°C 4 266 7.2 A
149°C 4 >300 6.7 A
ambient temp. 10–18°C 2 219 6.7 A
18–27°C 4 >300 6.7 A
27–35°C 3 257 7.8 A
Tab.3  
construction factor category number of mixtures %Severe* Tukey test grouping
NMAS 12.5-mm 6 0.7 A
19-mm 3 1.8 A
target temperature 135°C 1 0.4 A
143°C 4 0.6 A
149°C 4 1.9 A
ambient temperature 10–18°C 2 1.3 A
18–27°C 4 0.9 A
27–35°C 3 1.1 A
Tab.4  
Fig.2  
Fig.3  
Fig.4  
construction factor category number of mixtures average DD (%) Tukey test grouping
NMAS 12.5-mm 6 2.6 A
19-mm 3 3.8 A
target temperature 135°C 1 1.5 A/B
143°C 4 4.7 B
149°C 4 1.6 A
ambient temperature 10–18°C 2 3.2 A
18–27°C 4 3.2 A
27–35°C 3 2.5 A
Tab.5  
construction factor category number of mixtures maximum density differential (%) Tukey test grouping
NMAS 12.5-mm 6 3.1 A
19-mm 3 3.8 A
target temperature 135°C 1 1.5 A
143°C 4 5.3 B
149°C 4 1.8 A
ambient temperature 10–18°C 2 4.3 A
18–27°C 4 3.2 A
27–35°C 3 2.7 A
Tab.6  
Fig.5  
Fig.6  
Fig.7  
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