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Articles 61 - 72 of 72
Full-Text Articles in Civil Engineering
Sampling Procedure For Pavement Condition Evaluation Of Local Collectors And Access Roads, David Mfinanga
Sampling Procedure For Pavement Condition Evaluation Of Local Collectors And Access Roads, David Mfinanga
Tanzania Journal of Engineering and Technology (TJET)
Road surface condition evaluation involves the collection Of a lof Of data on different types of distresses. •lie exercise consumes a lot Of resources if the whole road section length is sureeyed and may be prone to errors as a result Of surveyors' fatigue. It is therefore important Io develop n reprevntative sample to be used When road condition manually. This study aimed nt determining sample size for condition evaluation of local collector access roads in urban areas in Tanzania. Two such roads namely l.ufungira and Kilimahewn roads respectively were selected for the study. It is recommended that a section …
Sensitivity Analysis Of Aashto's 2002 Flexible And Rigid Pavement Design Methods, Sanjay Shahji
Sensitivity Analysis Of Aashto's 2002 Flexible And Rigid Pavement Design Methods, Sanjay Shahji
Electronic Theses and Dissertations
Over the years pavement design has been based on empirical equations developed from the American Association of State Highway Transportation Officials (AASHTO) road tests. The various editions of the AASHTO pavement design guide have served well for several decades; nevertheless many serious limitations existed for their continued use as the nation's primary pavement design procedure. For example, the traffic loads and truck sizes have increased over the years, the AASHTO design equations were derived based on the climatic conditions present at the Road Tests site, and the issue of aging materials was not addressed in the design. To overcome these …
Interaction Between Micro-Cracking, Cracking, And Reduced Durability Of Concrete: Developing Methods For Considering Cumulative Damage In Life-Cycle Modeling, Zhifu Yang, W. Jason Weiss, J. Olek
Interaction Between Micro-Cracking, Cracking, And Reduced Durability Of Concrete: Developing Methods For Considering Cumulative Damage In Life-Cycle Modeling, Zhifu Yang, W. Jason Weiss, J. Olek
JTRP Technical Reports
It is becoming increasingly popular to utilize numerical simulation models to predict the long-term performance of concrete pavements and structures. The majority of these models have been developed using laboratory test data that considers concrete in an uncracked state. While uncracked concrete exists as the best case scenario, frequent cracking occurs in real structures that could have a profound impact on life cycle performance. Cracks from several sources may accumulate and interact thereby accelerating the deterioration of concrete. For example, the distributed cracking caused by freeze/thaw damage can substantially increases the rate of water absorption and reduces the load carrying …
Detection And Evaluation Of Exisiting Pavement System With Brick Base, Karishma Desai
Detection And Evaluation Of Exisiting Pavement System With Brick Base, Karishma Desai
Electronic Theses and Dissertations
At the turn of the century, the City of Orlando initiated the "Neighborhood Horizon Program." This program involved local citizens to help improve their community resources by engaging in a process of planning where the problems associated with the communities were identified. Many residents favored to bring back the brick roads that were overlaid with asphalt concrete to provided better transportation in the mid 1900s. With majority of the neighborhood streets already bricked, removing asphalt ensured safety, served as a technique for slowing traffic, and added to the historical integrity. Since there were no official documentations available that stated the …
Initial Study For Cost-Effectiveness Of Joint/Crack Sealing, Chuanxin Fang, Khaled A. Galal, David R. Ward, John E. Haddock
Initial Study For Cost-Effectiveness Of Joint/Crack Sealing, Chuanxin Fang, Khaled A. Galal, David R. Ward, John E. Haddock
JTRP Technical Reports
The sealing and resealing of joints and cracks in PCC, HMA, and composite pavements is assumed to be an important component of pavement maintenance. Recently this practice has been challenged by research indicating that sealing may not be cost-effective. The Indiana Department of Transportation currently spends approximately four million dollars annually to perform joint/crack sealing. The primary objective of the research presented in this report is to investigate the costeffectiveness of joint/crack sealing in relation to pavement performance. The results of a mail survey showed that most states, including Indiana, do not have quantitative justification for sealing policies, nor do …
Concrete Overlay As A Rehabilitation Option For Distressed Asphalt Pavements, Sudarshan Rajan, J. Olek
Concrete Overlay As A Rehabilitation Option For Distressed Asphalt Pavements, Sudarshan Rajan, J. Olek
JTRP Technical Reports
Ultra-thin Whitetopping (UTW) involves placing a very thin concrete overlay 50 mm to 100 mm thick (2”-4”) on the milled surface of a distressed asphalt pavement. To investigate the performance of UTW placed over a flexible pavement subjected to slow and heavy moving wheel loads, whitetopping mixes were placed over a milled pavement surface in the Accelerated Pavement Testing (APT) facility of the Indiana Department of Transportation (INDOT) Research Division in West Lafayette Indiana in the fall of 1999. The UTW installation experiment consisted of four test ‘lanes’ of two different thicknesses; each utilizing plain and fiber reinforced concrete. The …
Influence Of Curing Conditions On Strength Properties And Maturity Development Of Concrete, Scott Andrew Newbolds, Jan Olek
Influence Of Curing Conditions On Strength Properties And Maturity Development Of Concrete, Scott Andrew Newbolds, Jan Olek
JTRP Technical Reports
In this study, the results of both laboratory studies and a field study, conducted to evaluate the effects of different curing conditions on the strength properties and maturity development of pavement concrete, are presented. Further, a laboratory study was performed to evaluate the maturity concept in relation to the degree of hydration of cement. Concrete specimens, beams and cylinders, were prepared in the field study. The specimens in the field were cured in one of four curing conditions: lime bath, sandpit, air, or by temperature match curing. Specimens were tested for flexural strength and compressive strength, respectively. The temperature of …
Seasonal And Spatial Variation Of Subgrade Response, Mustaque Hossain, Stefan Romanoschi, Andrew J. Gisi
Seasonal And Spatial Variation Of Subgrade Response, Mustaque Hossain, Stefan Romanoschi, Andrew J. Gisi
Civil Engineering Faculty Publications - Archive
Temperature, subgrade moisture content, and Falling Weight Defleetometer (FWD)-deflection data were collected monthly on four asphalt pavement test sections in Kansas for a year. The subgrade moduli were baekealeulated using the elastic layer theory. It was found that for almost all sites, the monthly variation in subgrade moisture content was not very significant over the seasons. The patterns of subgrade response, in terms of subgrade moduli versus time, simulated sine-shaped forms signifying a possible temperature effect. Higher variabilities across the site were associated with the extreme temperature conditions, usually very low or high average pavement temperatures. In all cases, the …
Development Of A 3-D Finite Element Program For Pavement Analysis, Volume 3: Appendix 3, Tatsaba Nilaward, Chiang Shih, Thomas D. White, E. C. Ting
Development Of A 3-D Finite Element Program For Pavement Analysis, Volume 3: Appendix 3, Tatsaba Nilaward, Chiang Shih, Thomas D. White, E. C. Ting
JTRP Technical Reports
A three dimensional finite element program is developed for the analysis of pavement systems. An explicit approach of the finite element analysis is adopted. This approach results in a vector formulation of the equation of motion. Large displacement is considered through the use of a co-rotational approach which considers small deformations and large rotations of the elements. For the convenience of application a two dimensional finite element program is also developed. An eight-node isoperimetric solid element is used for the three dimensional analysis, and a four-node element for the two dimensional analysis. Loading conditions are verified for static ramp and …
Development Of A 3-D Finite Element Program For Pavement Analysis, Volume 2: Appendix 2, Tatsaba Nilaward, Chiang Shih, Thomas D. White, E. C. Ting
Development Of A 3-D Finite Element Program For Pavement Analysis, Volume 2: Appendix 2, Tatsaba Nilaward, Chiang Shih, Thomas D. White, E. C. Ting
JTRP Technical Reports
A three dimensional finite element program is developed for the analysis of pavement systems. An explicit approach of the finite element analysis is adopted. This approach results in a vector formulation of the equation of motion. Large displacement is considered through the use of a co-rotational approach which considers small deformations and large rotations of the elements. For the convenience of application a two dimensional finite element program is also developed. An eight-node isoperimetric solid element is used for the three dimensional analysis, and a four-node element for the two dimensional analysis. Loading conditions are verified for static ramp and …
Development Of A 3-D Finite Element Program For Pavement Analysis, Volume I: Introduction And Appendix 1, Tatsaba Nilaward, Chiang Shih, Thomas D. White, E. C. Ting
Development Of A 3-D Finite Element Program For Pavement Analysis, Volume I: Introduction And Appendix 1, Tatsaba Nilaward, Chiang Shih, Thomas D. White, E. C. Ting
JTRP Technical Reports
A three dimensional finite element program is developed for the analysis of pavement systems. An explicit approach of the finite element analysis is adopted. This approach results in a vector formulation of the equation of motion. Large displacement is considered through the use of a co-rotational approach which considers small deformations and large rotations of the elements. For the convenience of application a two dimensional finite element program is also developed. An eight-node ¶metric solid element is used for the three dimensional analysis, and a four-node element for the two dimensional analysis. Loading conditions are verified for static ramp and …
Remediation Of Hazardous Effluent Emitted From Beneath Newly Constructed Road Systems And Clogging Of Underdrain Systems, Ronald Fred Wukasch, Adil Siddiqui
Remediation Of Hazardous Effluent Emitted From Beneath Newly Constructed Road Systems And Clogging Of Underdrain Systems, Ronald Fred Wukasch, Adil Siddiqui
JTRP Technical Reports
The Indiana Department of Transportation uses recycled concrete pavement as aggregate for the construction of highways. The effluent from these pavements has a high pH. The high pH effluent can cause clogging of drains and vegetative kill around the outlet. This project looks into the source of the effluent water, its chemical composition and the approximate duration the problem can be expected to persist. The project also investigates possible methods for reduction of the problem in future installation. The approximate additional cost of these solutions and the problems associated with them are discussed as well.