Sharear Kabir
Louisiana State University
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Publication
Featured researches published by Sharear Kabir.
Journal of Materials in Civil Engineering | 2015
Louay N. Mohammad; Marwa M. Hassan; Bhanu Vallabhu; Sharear Kabir
AbstractWarm mix asphalt (WMA) describes various technologies that allow asphalt mixtures to be produced at lower temperatures as compared to hot mix asphalt (HMA). WMA technologies also offer improvements in workability, cost, and environmental sustainability such as reduced fuel usage, greenhouse gas emissions, and wear and tear at plants, while enhancing worker health and safety conditions. These benefits, as well as the mechanical properties of WMA mixtures, need to be quantified and compared to that of HMA. The primary objective of this study was to evaluate the laboratory performance of plant-produced lab-compacted mixtures utilizing various WMA technologies. The secondary objective of this study was to compare WMA energy consumption cost and emission data to conventional HMA mixtures in terms of fuel/energy savings at the plant and in terms of CO and CO2 emissions. Three projects in Louisiana utilizing four different WMA technologies were considered in this study, yielding 11 mixtures total. Each p...
Transportation Research Record | 2014
Samuel B. Cooper; Louay N. Mohammad; Sharear Kabir; William King Jr
Traditional asphalt mixture design practices recognize the need for laboratory parameters, which relate to field performance throughout the life of the pavement. However, many design methodologies consider volumetric proportions and strength characteristics of the mixtures, which may not provide adequate insight into mixture performance. Laboratory testing that can ascertain an asphalt mixtures capability to resist common distresses is needed to complement current design methodologies. Distresses commonly associated with flexible pavement failure are fatigue cracking and permanent deformation (rutting). The Louisiana Department of Transportation and Development proposed specification modifications for 2013 to address the need for balanced mixtures (i.e., mechanistic laboratory evaluation to complement volumetric criteria). This paper presents Louisianas experience with specification modifications to develop a balanced mixture as evaluated through the use of the Hamburg loaded wheel tester (HLWT) and semicircular bend (SCB) tests. Laboratory performance of 11 mixtures produced with the 2013 proposed specification modifications was compared with that of 40 mixtures produced under the 2006 specifications. Laboratory tests included HLWT and SCB to evaluate rutting and intermediate temperature cracking, respectively. The research showed that specification modifications did not adversely affect rutting or fatigue cracking resistance of the mixtures.
Transportation Research Record | 2011
Sharear Kabir; Patrick Icenogle; William King Jr; Christopher Abadie
The Louisiana Department of Transportation and Development (Louisiana DOTD) initiated the implementation of the Superpave® system by the end of the past decade. This study evaluated 8 to 10 years of field performance of 21 Louisiana Superpave projects, which included five Interstates, four U.S. routes, and 12 Louisiana routes. The evaluation was limited to the field performance of projects relative to age and did not consider factors associated with materials or construction. The criteria used to evaluate performance were confined to rutting, the international roughness index (IRI), alligator cracking, and random cracking. Superpave distress data were collected and stored in the pavement management system database of the Louisiana DOTD every 2 years. The collected data sets were analyzed and compared with Louisiana performance prediction models. These models were developed in the late 1990s by an expert panel from the Louisiana DOTD to predict the deterioration of pavement near the end of its design life. The original performance prediction models were reevaluated in 2002, and roughness models were implemented in 2003. The analysis indicated that after 8 to 10 years of service, most of the projects on Interstate and state highways were in good condition relative to the distress factors evaluated. Superpave seemed to control the early rutting and cracking in hot-mix construction while maintaining good IRI over the years. Points of concern, however, were the few issues of rutting on U.S. highways and cracking on Louisiana routes. In general, the rate of deterioration for rutting and IRI was lower than the prediction from the performance models.
Construction Research Congress 2016University of Puerto Rico, MayaguezAmerican Society of Civil Engineers | 2016
Louay N. Mohammad; Marwa M. Hassan; Bhanu Vallabhu; Sharear Kabir
Warm mix asphalt (WMA) describes various technologies that allow asphalt mixtures to be produced at lower temperatures as compared to hot mix asphalt (HMA). The objective of this study was first to evaluate the laboratory performance of plant-produced lab-compacted mixtures utilizing various WMA technologies and to compare WMA energy consumption cost and emission data to conventional HMA mixtures in terms of fuel/energy savings at the plant and in terms of CO and CO₂ emissions. Three projects in Louisiana utilizing four different WMA technologies were considered in this study. Laboratory tests included dynamic modulus (|E*|), flow number (FN), loaded wheel tracking (LWT) test, indirect tensile (IDT) test, semi-circular bend (SCB) test, thermal stress restrained specimen test (TSRST), and the Lottman moisture susceptibility test. Results indicated similar high and intermediate temperature performances. On average,
Archive | 2013
Patrick Icenogle; Sharear Kabir
1.61 of energy savings per ton of produced asphalt mixture was observed, along with a considerable reduction in air pollutants at the plant. However, the cost of additives and royalty fees would reduce the total cost savings from using WMA.
Archive | 2009
William King Jr; Sharear Kabir; Louay N Mohammad
Archive | 2016
Samuel B. Cooper; William King Jr; Sharear Kabir
Archive | 2014
William King Jr; Sharear Kabir; Samuel B. Cooper; Kevin Gaspard
Transportation Research Board 92nd Annual MeetingTransportation Research Board | 2013
Patrick Icenogle; Sharear Kabir; William King Jr; Chris Abadie
Transportation Research Board 92nd Annual MeetingTransportation Research Board | 2013
Nazimuddin M Wasiuddin; Saeid Salehi Ashani; Sharear Kabir; Christopher Abadie; William King Jr; Louay N. Mohammad