Long-Term Field Performance of Flexible Pavements Using Warm Mix Asphalt Technologies

2020 ◽  
Author(s):  
SHIHUI SHEN ◽  
WEIGUANG ZHANG ◽  
SHENGHUA WU ◽  
LOUAY MOHAMMAD ◽  
BALASINGAM MUHUNTHAN
Keyword(s):  
Flexible Pavements ◽  
Field Performance ◽  
Warm Mix Asphalt ◽  
Term Field

Field Performance of Foaming Warm Mix Asphalt Pavement

2019 ◽  
Vol 2673 (3) ◽  
pp. 281-294 ◽  
Author(s):  
Shenghua Wu ◽  
Weiguang Zhang ◽  
Shihui Shen ◽  
Balasingam Muhunthan
Keyword(s):  
Field Performance ◽  
Warm Mix Asphalt ◽  
Void Content ◽  
Transverse Cracking ◽  
Water Based ◽  
Asphalt Content ◽  
Air Void ◽  
Air Void Content ◽  
Term Field

Water-containing and water-based foaming warm mix asphalt (WMA) technologies have been widely used in recent years but their long-term field performance is scarcely documented. This paper summarizes the field performances of six water-containing foaming and 10 water-based foaming WMA pavements across the United States and compares them with corresponding hot mix asphalt (HMA) pavements. Two series of field distress surveys were conducted to measure wheel-path longitudinal cracking, transverse cracking, and rut depth. Field cores were extracted to measure the in-place air void content, aggregate gradation, and asphalt content. The volumetric properties and field performance of foaming WMA and HMA control pavements were evaluated. The foaming WMA pavements showed slightly higher in-place air void (i.e., lower in-place density) than the HMA pavements. It was also found that the foaming WMA pavements in general had comparable or more wheel-path longitudinal cracking than the HMA pavements. The long-term field performance of foaming WMA pavements for transverse cracking and rutting were found to be similar to control HMA pavements. The study also reinforced the importance of in-place air void and asphalt content, finding that slightly higher asphalt content and lower in-place air void content may be beneficial for long-term resistance to cracking of asphalt pavements. As a result of the findings, the optimal pavement maintenance time was estimated to be four to five years since paving for full-depth pavement projects.

Long-Term Field Performance of Warm Mix Asphalt Technologies

2017 ◽  
Author(s):  
Washington State University ◽  
Louisiana Transportation Research Center ◽  
Pennsylvania State University—Altoona ◽  
◽  
◽  
...  
Keyword(s):  
Field Performance ◽  
Warm Mix Asphalt ◽  
Term Field

Predicting the Long-Term Field Performance of Coating Systems on Steel Using a Rapid Electrochemical Test: The Damage Tolerance Test

CORROSION ◽  
2012 ◽  
Vol 68 (3) ◽  
pp. 035007-1-035007-13 ◽  
Author(s):  
S.R. Taylor ◽  
F. Contu ◽  
L.M. Calle ◽  
J.P. Curran ◽  
W. Li
Keyword(s):  
Damage Tolerance ◽  
Field Performance ◽  
Tolerance Test ◽  
Electrochemical Test ◽  
Term Field

Long-term field study of a deep-corrugated metal box type culvert

1994 ◽  
Vol 31 (2) ◽  
pp. 175-180 ◽  
Author(s):  
Shad M. Sargand ◽  
Glenn A. Hazen ◽  
Teruhisa Masada ◽  
John O. Hurd
Keyword(s):  
Field Performance ◽  
Reference Points ◽  
Load Test ◽  
Static Load Test ◽  
Static Loads ◽  
Long Term Study ◽  
Corrugated Metal ◽  
Over Time ◽  
Term Field

A deep-corrugated metal box culvert structure was instrumented with strain gages and tape extensometer reference points in the field. Performance was monitored during backfilling and, paving and under static loads shortly after completion of installation. Beyond the initial study, deflection readings were taken periodically for 3 years. Also, the static load test was conducted during the second and third years to examine changes in structural responses over time. The results of the study showed that the culvert deflection stabilized within the 3 year period. The overall deflection recorded during the construction phases was about 2 cm, and the additional deflection of about 0.8 cm took place during the long-term study period. The deflection, moment, and thrust responses of the culvert under static loads improved over time. This was considered to be because of backfill soil densification under repeated traffic loads. Key words : long-term field performance, culvert, box type, deep corrugation, deflection, live loads.

scholarly journals Energy Efficient Wireless Sink Node for Monitoring of Snow Environment

2021 ◽  
Vol 12 (2) ◽  
pp. 1775-1785
Author(s):  
Rajesh Kumar Garg, Et. al.
Keyword(s):  
Energy Efficient ◽  
Snow Depth ◽  
Field Performance ◽  
Cost Effective ◽  
Field Evaluation ◽  
Sink Node ◽  
Depth Sensor ◽  
Power Module ◽  
Term Field

Conventionally, sink node is considered to have large hardware and energy resources; however, many times sink node is working in same conditions as source nodes, especially when deployed for monitoring of the snow environment. In this paper, an effort has been made to practically realize a sink node which is energy efficient and cost effective for monitoring applications. To save energy, the Main Power Module is designed to provide controlled powers to sensors and sub-modules. The paper discusses design aspects of the sink node and its long-term field evaluation with environmental sensors, especially the Snow Depth Sensor of MaxBotix. Field performance of Snow Depth Sensor has been enhanced by Euclidean Minimum Distance filter which improved the correlation of data to 0.997. The proposed design helps to achieve energy consumption of 42.72mWh which is significantly lower than the previous work. The reliable working of the sink node in the long-term field evaluation indicates that snow environment can be monitored at less expense of energy by employing proposed sensors and the specially designed sink node.

scholarly journals Simulation and design of collector array units within large systems

2019 ◽  
Author(s):  
Simon Furbo ◽  
Weiqiang Kong ◽  
Jianhua Fan
Keyword(s):  
Performance Prediction ◽  
Field Performance ◽  
Operating Conditions ◽  
Test Information ◽  
Large Systems ◽  
Term Field

Investigation of measured long-term field performance in relation to standardized collector test information and tools/models for annual performance prediction at different operating conditions and field designs.

Comparison of the Relative Long-Term Field Performance among Various Warm Mix Asphalt (WMA) Pavements

2018 ◽  
Vol 2672 (28) ◽  
pp. 200-210 ◽  
Author(s):  
Weiguang Zhang ◽  
Shihui Shen ◽  
Shenghua Wu
Keyword(s):  
Field Performance ◽  
The United States ◽  
Warm Mix Asphalt ◽  
Traffic Volumes ◽  
Pavement Structures ◽  
Potential Factors ◽  
Reduce Emissions ◽  
Term Performance ◽  
Fracture Work

The use of warm mix asphalt (WMA) has increased greatly over the past decade because it provides potential to lower energy demands, reduce emissions, and increase haul distances. However, questions remain about the long-term performance of WMA pavements, including whether different WMA technologies can provide the same field performance. In this paper, field rutting and cracking (transverse and longitudinal) performance data for chemical, organic, and foaming WMA technologies are compared pairwise. Thirty-four WMA-WMA pairs from 13 field test roads are included, which cover different pavement ages, traffic volumes, pavement structures, WMA technologies, and four climate zones across the United States. For the WMA-WMA pairs that exhibited statistically different performance, their material properties were investigated further to identify potential factors that could be used to characterize such field differences. The results indicate that, generally, no statistical performance differences are evident between the WMA-WMA pairs. However, it is worth noting that over the longer term, there are individual projects whose organic pavement sections showed statistically higher amounts of cracking than the chemical and foaming sections. Based on the laboratory testing results on field cores, it is suggested that the greater amounts of transverse cracking exhibited by organic pavements may be caused by organic’s lower mixture fracture work density and lower binder failure strain values compared with those of the chemical and foaming sections. The greater amounts of longitudinal cracking exhibited by the organic pavements may be caused by organic’s higher mixture indirect tensile strength, lower mixture fracture work density, and lower binder fracture energy values compared with those of the chemical and foaming sections.

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