In cooperation with the Ontario Ministry of Transportation and the United States Transportation R... more In cooperation with the Ontario Ministry of Transportation and the United States Transportation Research Board, researchers at Carleton University in Ottawa, Canada have developed the In-Situ Shear Stiffness Test (InSiSST)-a new field test facility for measuring shear stiffness of compacted asphalt concrete surface layers. To date, various field-testing programs have been conducted to evaluate the in-situ shear stiffness of asphalt concrete mixes using the newly developed InSiSST. In this paper, a brief overview of the InSiSST facility is presented, together with the results of testing completed in Ottawa, Bancroft, Toronto, and at the Long Term Pavement Performance (LTPP) SPS-9A test site located in Petawawa, Ontario. The Petawawa site (870900) is of particular interest as four of the six test sections consist of SuperPave asphalt mixes, while the remaining two sections were designed using the Marshall method. The results of field testing at these locations has indicated that the InSiSST is both sensitive to differences in asphalt mix shear stiffness and is able to rank mix performance between different mixes in terms of measured permanent deformation. With continued refinement and testing, is expected that InSiSST will become a valuable test facility for the design and quality control of hot mix asphalt concrete pavements.
By: Steve Goodman, M.Eng., P.Eng. Canadian Strategic Highway Research Program 2323 St. Laurent Bl... more By: Steve Goodman, M.Eng., P.Eng. Canadian Strategic Highway Research Program 2323 St. Laurent Blvd., Ottawa, Ontario Canada Tel: 613-736-1350, Ext. 261, Fax: 613-736-1395 ... Wael Bekheet, Yasser Hassan and AO Abd El Halim Department of Civil and ...
Traditional pavement preservation (PP) practices have mainly focused on corrective maintenance ac... more Traditional pavement preservation (PP) practices have mainly focused on corrective maintenance activities. However, with the constant demands on highway networks and the extensive costs required for rehabilitation, highway agencies have started to adopt preventive maintenance (PM) strategies into their PP programs. PM is a set of activities performed while the pavement is still in a good or fair condition to inhibit progressive failure and therefore extend the service life of the pavement. Potentially, PM can enhance pavement performance and reduce the life-cycle costs of highway facilities. The Ministry of Transportation of Ontario (MTO) has been one of the pioneering agencies in applying pavement management system (PMS) analysis tools to its annual pavement maintenance and rehabilitation (M&R) program at the network level. Currently, MTO is in the process of implementing a PP program that includes PM as a key component. In this program, a practical PM model is developed through a ...
In cooperation with the Ontario Ministry of Transportation and the U.S. Transportation Research B... more In cooperation with the Ontario Ministry of Transportation and the U.S. Transportation Research Board, researchers at Carleton University in Ottawa, Canada, have developed the In-Situ Shear Stiffness Test (InSiSST) a new field test facility for measuring shear stiffness of compacted asphalt concrete surface layers. To date, various field-testing programs have been conducted to evaluate in-situ shear stiffness of asphalt concrete mixes using the newly developed InSiSST. In this paper, a brief overview of the InSiSST facility is presented, together with the results of testing completed in Ottawa, other cities, and at the Long Term Pavement Performance SPS-9A test site in Petawawa, Ontario. The Petawawa site is of special interest as 4 of the 6 test sections consist of SuperPave asphalt mixes, while the other 2 sections were designed using the Marshall method. Results of field testing at these locations have shown that the InSiSST is both sensitive to differences in asphalt mix shear s...
In cooperation with the United States Transportation Research Board and the Ontario Ministry of T... more In cooperation with the United States Transportation Research Board and the Ontario Ministry of Transportation, researchers at Carleton University in Ottawa, Canada have developed the In-Situ Shear Stiffness Test (InSiSST) - a new field test facility for measuring shear properties of compacted asphalt concrete layers. This paper has two primary objectives. Firstly, the InSiSST facility itself is introduced, including the test procedure used for assessing pavement layer shear properties. Secondly, results gathered with InSiSST while testing in Petawawa, Ontario during the summer of 2000 are also presented. The Petawawa site is of particular interest to North American road authorities as it is part of the SPS-9A (Superpave evaluation) experiment of the United States Long Term Pavement Performance project. Results obtained with this investigation indicated that mix shear stiffness values obtained from InSiSST testing are highly correlated with measured rutting at the test site and bett...
Rio Blanco County is located in the rural northwestern corner of the State of Colorado. Recently,... more Rio Blanco County is located in the rural northwestern corner of the State of Colorado. Recently, there has been a significant increase in the truck traffic on the county roads, due to increased oil and gas exploration activities. The presence of such heavy trucks has raised concerns about the impact of additional truckloads on the pavement conditions of the county roads, particularly due to the seasonal variation in the subgrade soil conditions as a result of temperature variation. A study was initiated to develop short term Spring Load Restrictions (SLR) guidelines for Rio Blanco County for the spring 2007. This study was based on deflection testing and was successfully completed by late spring 2007. The results from this study were further validated using data collected from sub-surface instrumentation used as part of the on-going Phase 2 of the study to develop long term SLR guidelines for the County. In spring 2007, the start of the SLR was estimated using a combination of defl...
Many private, public or commercial enterprises have a large percentage of their assets’ capital a... more Many private, public or commercial enterprises have a large percentage of their assets’ capital and maintenance budgets directed towards paved assets. They need to maintain these assets at an acceptable level of service in terms of both the functional condition and level of safety. York Catholic District School Board (YCDSB) manages approximately 100 facilities. Recently, they initiated a project to inventory the condition of their paved assets and to develop a paved assets management system. The implementation of the system was a particular challenge, since these assets represented individual pavement sections with no historic performance data, and are significantly different from a traditional road functional and geometric perspective. Once the assets were assessed, all collected data were loaded into a management system database where the analysis was performed to identify the current and future network needs. The implementation involved development of a set of analysis models in...
Available funds are, typically, not adequate to satisfy all the required maintenance projects for... more Available funds are, typically, not adequate to satisfy all the required maintenance projects for highways and roads networks in most countries, including Egypt. Under current policies and funding levels, further deterioration in pavement conditions can be expected, since the budget needed for highway maintenance is greater that the funding levels available. As a result, highway agencies must seek more cost-effective methods for highway network preservation. The development of pavement management optimization model is essential to manage maintenance of highways and roads networks in Egypt. In this paper, a Pavement Maintenance Management Optimization Model (PMMOM) for highways in Egypt is developed using genetic algorithms optimization application, designed as an add-in for MS Excel™. Markov chain theory is used to generate the Transition Probability Matrices (TPM) for each type of maintenance activities. The models used in PMMOM are developed using the available data at the General...
Yongqi Li [email protected] Arizona Department of Transportation Arizona Transportation Research Cent... more Yongqi Li [email protected] Arizona Department of Transportation Arizona Transportation Research Center 2739 East Washington Street Phoenix, Arizona 85034-1422 Phone: 602-712-6927 Fax: 602-712-3400 ... Alan Cheetham, M.Sc. [email protected] Stantec ...
Michael Robson [email protected] Stantec Consulting 8211 South 48th Street Phoenix, Arizona... more Michael Robson [email protected] Stantec Consulting 8211 South 48th Street Phoenix, Arizona 85044 Phone: 602-707-4668 Fax: 602-431-9562 ... Randy Nicholson [email protected] Jefferson Parish Streets 1901 Ames Blvd Marrero, Louisiana ...
The National Parks Services (NPS) road system of Park Roads and Parkways (PRP) includes over 8,00... more The National Parks Services (NPS) road system of Park Roads and Parkways (PRP) includes over 8,000 miles of paved and unpaved roads jointly administered by NPS and the Federal Highway Administration (FHWA). Recently, NPS and the Federal Lands Highway Program (FLHP) ...
Plastic wastes are everywhere in today’s lifestyle and are growing rapidly specially in a develop... more Plastic wastes are everywhere in today’s lifestyle and are growing rapidly specially in a developing country like Egypt. As these are non-biodegradable, there is a main issue facing the community concerning the handling of this plastic rubbish. On the other hand, different forms of increased distresses in flexible pavements such as cracking and rutting as well as moisture damage ratio should be faced and reduced by modifying the performance of hot asphalt mixtures. The reclaimed plastics that originally made of polymers have been used as an anti-stripping modifier to reduce the appearance of distresses in asphalt pavement surface and increase the resistance against moisture damage. In this research, the recycled plastic wastes have been used according to dry mixing process using contents (0.0, 2.0, 3.0, 4.0 and 5%) from the total weight of hot asphalt mixture. The optimal bitumen content has been derived for each polymer content by using Marshall procedure. The performance of modifi...
Arizona Department of Transportation (ADOT) has been one of the pioneering states in the developm... more Arizona Department of Transportation (ADOT) has been one of the pioneering states in the development and implementation of Pavement Management System (PMS). Since the early 1980's, ADOT has been using pavement management tools to manage, maintain and preserve ...
Flexible pavements are an integral part of the highway and transportation network, which serve th... more Flexible pavements are an integral part of the highway and transportation network, which serve the daily needs of the population and economy. Every year, billions of dollars are invested in constructing, maintaining and rehabilitating North American runways, roads and highways. Theoretical analysis supported by laboratory investigations and verified by field studies and observations have showed that rolling compaction is one of the main contributors to asphalt cracking. Results of research work carried out over the past two decades in the field of asphalt compaction have demonstrated that current asphalt compactors induce hairline cracks at the top of the newly compacted layer. These hairline cracks permit water and moisture to infiltrate into the pavement structure. The effects of moisture on asphalt concrete pavements have been examined extensively in the literature. Moisture causes the asphalt concrete mixture to exhibit a separation of the asphalt film from the surface of the aggregate in a phenomenon better known as stripping. Stripping is one of the key contributors to a loss of the structural integrity of the asphalt concrete mixture, which ultimately accelerates the deterioration and failure of the pavement. An innovative compaction technology, AMIR, or "Asphalt Multi Integrated Roller" can offer a more effective alternative for overcoming the problems of existing steel drum rollers, by reducing the permeability, and in turn, improving the performance of flexible pavements. The AMIR uses a multi-layered belt of special rubber compounds to create a single flat contact plate for compaction. This area minimizes horizontal forces applied to the asphalt mat and provides a high degree of confinement during compaction, thus eliminating surface cracking and significantly reducing permeability. Field-testing measuring the asphalt concrete surface layer permeability, in terms of the hydraulic conductivity (K) was conducted on pavement sections constructed using the AMIR roller and a conventional steel drum roller. Asphalt concrete pavements compacted by steel drum rollers were found to be up to 13 times more permeable than those compacted by the AMIR roller. In this paper, the major steps leading to the realization of the influence of the rolling of the asphalt layer on the long-term performance of the newly compacted pavement are outlined. It also briefly identifies issues of main concern to pavement engineers and highway agencies such as initiation and propagation of cracks. Finally, field-testing and analysis results comparing the permeability of asphalt pavements compacted by the AMIR roller and conventional steel drum rollers are then detailed.
In cooperation with the Ontario Ministry of Transportation and the United States Transportation R... more In cooperation with the Ontario Ministry of Transportation and the United States Transportation Research Board, researchers at Carleton University in Ottawa, Canada have developed the In-Situ Shear Stiffness Test (InSiSST)-a new field test facility for measuring shear stiffness of compacted asphalt concrete surface layers. To date, various field-testing programs have been conducted to evaluate the in-situ shear stiffness of asphalt concrete mixes using the newly developed InSiSST. In this paper, a brief overview of the InSiSST facility is presented, together with the results of testing completed in Ottawa, Bancroft, Toronto, and at the Long Term Pavement Performance (LTPP) SPS-9A test site located in Petawawa, Ontario. The Petawawa site (870900) is of particular interest as four of the six test sections consist of SuperPave asphalt mixes, while the remaining two sections were designed using the Marshall method. The results of field testing at these locations has indicated that the InSiSST is both sensitive to differences in asphalt mix shear stiffness and is able to rank mix performance between different mixes in terms of measured permanent deformation. With continued refinement and testing, is expected that InSiSST will become a valuable test facility for the design and quality control of hot mix asphalt concrete pavements.
By: Steve Goodman, M.Eng., P.Eng. Canadian Strategic Highway Research Program 2323 St. Laurent Bl... more By: Steve Goodman, M.Eng., P.Eng. Canadian Strategic Highway Research Program 2323 St. Laurent Blvd., Ottawa, Ontario Canada Tel: 613-736-1350, Ext. 261, Fax: 613-736-1395 ... Wael Bekheet, Yasser Hassan and AO Abd El Halim Department of Civil and ...
Traditional pavement preservation (PP) practices have mainly focused on corrective maintenance ac... more Traditional pavement preservation (PP) practices have mainly focused on corrective maintenance activities. However, with the constant demands on highway networks and the extensive costs required for rehabilitation, highway agencies have started to adopt preventive maintenance (PM) strategies into their PP programs. PM is a set of activities performed while the pavement is still in a good or fair condition to inhibit progressive failure and therefore extend the service life of the pavement. Potentially, PM can enhance pavement performance and reduce the life-cycle costs of highway facilities. The Ministry of Transportation of Ontario (MTO) has been one of the pioneering agencies in applying pavement management system (PMS) analysis tools to its annual pavement maintenance and rehabilitation (M&R) program at the network level. Currently, MTO is in the process of implementing a PP program that includes PM as a key component. In this program, a practical PM model is developed through a ...
In cooperation with the Ontario Ministry of Transportation and the U.S. Transportation Research B... more In cooperation with the Ontario Ministry of Transportation and the U.S. Transportation Research Board, researchers at Carleton University in Ottawa, Canada, have developed the In-Situ Shear Stiffness Test (InSiSST) a new field test facility for measuring shear stiffness of compacted asphalt concrete surface layers. To date, various field-testing programs have been conducted to evaluate in-situ shear stiffness of asphalt concrete mixes using the newly developed InSiSST. In this paper, a brief overview of the InSiSST facility is presented, together with the results of testing completed in Ottawa, other cities, and at the Long Term Pavement Performance SPS-9A test site in Petawawa, Ontario. The Petawawa site is of special interest as 4 of the 6 test sections consist of SuperPave asphalt mixes, while the other 2 sections were designed using the Marshall method. Results of field testing at these locations have shown that the InSiSST is both sensitive to differences in asphalt mix shear s...
In cooperation with the United States Transportation Research Board and the Ontario Ministry of T... more In cooperation with the United States Transportation Research Board and the Ontario Ministry of Transportation, researchers at Carleton University in Ottawa, Canada have developed the In-Situ Shear Stiffness Test (InSiSST) - a new field test facility for measuring shear properties of compacted asphalt concrete layers. This paper has two primary objectives. Firstly, the InSiSST facility itself is introduced, including the test procedure used for assessing pavement layer shear properties. Secondly, results gathered with InSiSST while testing in Petawawa, Ontario during the summer of 2000 are also presented. The Petawawa site is of particular interest to North American road authorities as it is part of the SPS-9A (Superpave evaluation) experiment of the United States Long Term Pavement Performance project. Results obtained with this investigation indicated that mix shear stiffness values obtained from InSiSST testing are highly correlated with measured rutting at the test site and bett...
Rio Blanco County is located in the rural northwestern corner of the State of Colorado. Recently,... more Rio Blanco County is located in the rural northwestern corner of the State of Colorado. Recently, there has been a significant increase in the truck traffic on the county roads, due to increased oil and gas exploration activities. The presence of such heavy trucks has raised concerns about the impact of additional truckloads on the pavement conditions of the county roads, particularly due to the seasonal variation in the subgrade soil conditions as a result of temperature variation. A study was initiated to develop short term Spring Load Restrictions (SLR) guidelines for Rio Blanco County for the spring 2007. This study was based on deflection testing and was successfully completed by late spring 2007. The results from this study were further validated using data collected from sub-surface instrumentation used as part of the on-going Phase 2 of the study to develop long term SLR guidelines for the County. In spring 2007, the start of the SLR was estimated using a combination of defl...
Many private, public or commercial enterprises have a large percentage of their assets’ capital a... more Many private, public or commercial enterprises have a large percentage of their assets’ capital and maintenance budgets directed towards paved assets. They need to maintain these assets at an acceptable level of service in terms of both the functional condition and level of safety. York Catholic District School Board (YCDSB) manages approximately 100 facilities. Recently, they initiated a project to inventory the condition of their paved assets and to develop a paved assets management system. The implementation of the system was a particular challenge, since these assets represented individual pavement sections with no historic performance data, and are significantly different from a traditional road functional and geometric perspective. Once the assets were assessed, all collected data were loaded into a management system database where the analysis was performed to identify the current and future network needs. The implementation involved development of a set of analysis models in...
Available funds are, typically, not adequate to satisfy all the required maintenance projects for... more Available funds are, typically, not adequate to satisfy all the required maintenance projects for highways and roads networks in most countries, including Egypt. Under current policies and funding levels, further deterioration in pavement conditions can be expected, since the budget needed for highway maintenance is greater that the funding levels available. As a result, highway agencies must seek more cost-effective methods for highway network preservation. The development of pavement management optimization model is essential to manage maintenance of highways and roads networks in Egypt. In this paper, a Pavement Maintenance Management Optimization Model (PMMOM) for highways in Egypt is developed using genetic algorithms optimization application, designed as an add-in for MS Excel™. Markov chain theory is used to generate the Transition Probability Matrices (TPM) for each type of maintenance activities. The models used in PMMOM are developed using the available data at the General...
Yongqi Li [email protected] Arizona Department of Transportation Arizona Transportation Research Cent... more Yongqi Li [email protected] Arizona Department of Transportation Arizona Transportation Research Center 2739 East Washington Street Phoenix, Arizona 85034-1422 Phone: 602-712-6927 Fax: 602-712-3400 ... Alan Cheetham, M.Sc. [email protected] Stantec ...
Michael Robson [email protected] Stantec Consulting 8211 South 48th Street Phoenix, Arizona... more Michael Robson [email protected] Stantec Consulting 8211 South 48th Street Phoenix, Arizona 85044 Phone: 602-707-4668 Fax: 602-431-9562 ... Randy Nicholson [email protected] Jefferson Parish Streets 1901 Ames Blvd Marrero, Louisiana ...
The National Parks Services (NPS) road system of Park Roads and Parkways (PRP) includes over 8,00... more The National Parks Services (NPS) road system of Park Roads and Parkways (PRP) includes over 8,000 miles of paved and unpaved roads jointly administered by NPS and the Federal Highway Administration (FHWA). Recently, NPS and the Federal Lands Highway Program (FLHP) ...
Plastic wastes are everywhere in today’s lifestyle and are growing rapidly specially in a develop... more Plastic wastes are everywhere in today’s lifestyle and are growing rapidly specially in a developing country like Egypt. As these are non-biodegradable, there is a main issue facing the community concerning the handling of this plastic rubbish. On the other hand, different forms of increased distresses in flexible pavements such as cracking and rutting as well as moisture damage ratio should be faced and reduced by modifying the performance of hot asphalt mixtures. The reclaimed plastics that originally made of polymers have been used as an anti-stripping modifier to reduce the appearance of distresses in asphalt pavement surface and increase the resistance against moisture damage. In this research, the recycled plastic wastes have been used according to dry mixing process using contents (0.0, 2.0, 3.0, 4.0 and 5%) from the total weight of hot asphalt mixture. The optimal bitumen content has been derived for each polymer content by using Marshall procedure. The performance of modifi...
Arizona Department of Transportation (ADOT) has been one of the pioneering states in the developm... more Arizona Department of Transportation (ADOT) has been one of the pioneering states in the development and implementation of Pavement Management System (PMS). Since the early 1980's, ADOT has been using pavement management tools to manage, maintain and preserve ...
Flexible pavements are an integral part of the highway and transportation network, which serve th... more Flexible pavements are an integral part of the highway and transportation network, which serve the daily needs of the population and economy. Every year, billions of dollars are invested in constructing, maintaining and rehabilitating North American runways, roads and highways. Theoretical analysis supported by laboratory investigations and verified by field studies and observations have showed that rolling compaction is one of the main contributors to asphalt cracking. Results of research work carried out over the past two decades in the field of asphalt compaction have demonstrated that current asphalt compactors induce hairline cracks at the top of the newly compacted layer. These hairline cracks permit water and moisture to infiltrate into the pavement structure. The effects of moisture on asphalt concrete pavements have been examined extensively in the literature. Moisture causes the asphalt concrete mixture to exhibit a separation of the asphalt film from the surface of the aggregate in a phenomenon better known as stripping. Stripping is one of the key contributors to a loss of the structural integrity of the asphalt concrete mixture, which ultimately accelerates the deterioration and failure of the pavement. An innovative compaction technology, AMIR, or "Asphalt Multi Integrated Roller" can offer a more effective alternative for overcoming the problems of existing steel drum rollers, by reducing the permeability, and in turn, improving the performance of flexible pavements. The AMIR uses a multi-layered belt of special rubber compounds to create a single flat contact plate for compaction. This area minimizes horizontal forces applied to the asphalt mat and provides a high degree of confinement during compaction, thus eliminating surface cracking and significantly reducing permeability. Field-testing measuring the asphalt concrete surface layer permeability, in terms of the hydraulic conductivity (K) was conducted on pavement sections constructed using the AMIR roller and a conventional steel drum roller. Asphalt concrete pavements compacted by steel drum rollers were found to be up to 13 times more permeable than those compacted by the AMIR roller. In this paper, the major steps leading to the realization of the influence of the rolling of the asphalt layer on the long-term performance of the newly compacted pavement are outlined. It also briefly identifies issues of main concern to pavement engineers and highway agencies such as initiation and propagation of cracks. Finally, field-testing and analysis results comparing the permeability of asphalt pavements compacted by the AMIR roller and conventional steel drum rollers are then detailed.
Uploads
Papers by Wael Bekheet