Civil and Environmental Engineering Commons^™

Effect Of Fine Aggregate Angularity On Asphalt Mixture Performance, Chih-Jen Lee, Thomas D. White, Terry R. West

JTRP Technical Reports

Superpave aggregate qualification includes the fine aggregate angularity (FAA). Fine aggregate angularity levels used in the Superpave system are below 40, 40 to 45 and above 45. The higher values are specified for layers near the surface and for higher traffic levels. The objective of this study was to address the effect of fine aggregate angularity on asphalt mixture rutting performance. A total of 18 mixtures were designed according to the Superpave volumetric design criteria. A surface mixture utilizing a partially crushed 9.5mm coarse aggregate and a single PG 64-22 binder were utilized. The poor quality coarse aggregate was used …

Indot Training Needs Study, Ray E. Eberts, Jodi S. Goodman, Bob G. Mccullouch, Kumares C. Sinha

JTRP Technical Reports

During the strategic plan development process, the INDOT staff identified a list of possible training needs, which included suggestions for workshops, certification procedures, training sessions for interpersonal communication, computer skills, and video conferencing, as well as more specific topics such as hazardous areas and clean up of contaminated soil. This study’s objective is to assess current and future training needs at INDOT on a comprehensive basis, as well as analyze current and future trends in order to fulfill the INDOT strategic goals and objectives.

Optical Imaging Method For Bridge Painting Maintenance And Inspection, Luh M. Chang, Yasser Abdelrazig, Po-Han Chen

JTRP Technical Reports

The term "quality" is defined as the conformance to predetermined requirements or specifications. These requirements may be set in terms of the end result required or as a detailed description of how work should be executed. Recently, there has been increasing interest in quality assurance in the construction industry. Quality assurance includes design and planning, sampling, inspection, testing, and assessment to ensure that end products perform according to specifications. This research proposes a new quality assessment model for highway steel bridges and more specifically for coating rust assessment. The research proposes a hybrid model using image processing and neural networks …

New Treatment Combinations For Vegetation Management Along Indiana Roadsides, D. James Morré

JTRP Technical Reports

This report represents results from a project for research to develop and implement new treatment mixtures for control of problem brush, trees and other woody species and herbicide-resistant weeds along Indiana roadsides. An environmentally safe mixture of trichlopyr (Galon Herbicide) and ammonium nitrate for one application control of deciduous roadside vegetation was developed. Also discovered and developed was a new, environmentally safe and effective TR series of additives that enhance the action of the auxin herbicides (trichlopyr, 2,4-D, picloram) for inclusion in both the brush control mixtures and control of milkweed, Canada thistle, bindweed, ground cherry and other perennial, herbicide-resistant …

A Laboratory Sensitivity Study Of Hydraulic Parameters Important In The Deployment Of Fixed-In-Place Scour-Monitoring Devices, Dennis A. Lyn, E. Neseem, A. Ramachandra Rao, A. G. Altschaeffl

JTRP Technical Reports

INDOT is considering the deployment of fixed scour-monitoring instrumentation as part of a systematic response to the problem of scour around bridge piers. Fixed-in-place automated scour-monitoring devices measure the depth of scour at the point where they are installed. Unless they are installed at the location where maximum scour occurs, their readings may give a misleading estimate of scour potential. This raises a number of technical issues concerning their effective deployment and the interpretation of the collected data, which should be resolved in order to maximize the benefits to INDOT from using these monitoring devices. These include the location of …

Monitoring Of Long-Term Performance Of Highway Bridge Columns Retrofitted By Advanced Composite Jackets In Indiana, Ming-Hung Teng, Elisa D. Sotelino, Wai-Fah Chen

JTRP Technical Reports

The service life of highway bridges is limited by the deterioration of their substructure components. In the U.S., it is estimated that more than 240,000 (about 40%) of the highway bridges are functionally or structurally deficient. Repairing these deteriorated bridges using traditional methods is usually time-consuming and expensive. Furthermore, these methods are such that they can cause a number of problems, such as being a threat to public safety and severe traffic disruption. Thus, it is important that new safer and more efficient methods be developed. Fiber Reinforced Plastics (FRP) have a great potential to provide such a solution. Due …

Utilizing Gis Technology To Improve Indot Pavement Friction Data Management And Distribution, Karen Zhu

JTRP Technical Reports

Pavement friction condition provides an important parameter in selecting highway rehabilitation and maintenance projects. The Research Division of Indiana Department of Transportation has been conducting annual pavement friction testing on the Indiana highway network. Due to the large amount of data accumulated, an efficient system is in demand for data management. In this project, we developed a computer program that constitutes an integrated system for friction data management and distribution. In the developed system, database technology was utilized for data storage and organization; networking technology was utilized for real-time data distribution; geographic information systems (GIS) technology as well as computer …

Examination Of Post-Tensioned Steel Bridges In Indiana, Hung-I Wu, Mark D. Bowman

JTRP Technical Reports

The purpose of the research study is to conduct an investigation to understand the performance of a relatively new type of bridge construction that involves prestressed (post-tensioned) steel-concrete composite bridge members. Strictly speaking, the technical and economical advantages of this type of structure have been understood for several decades. However, the application of this concept to practice is still very limited due to difficulties associated with the post-tensioning anchorage. The study was thus intended to explore the mechanical behavior of such construction. Both the short-term and long-term bridge performance were evaluated in this study.

The investigation included experimental as well …

Development Of Closed Loop System Evaluation Equipment And Procedures, Eric J. Nelson, Montasir Abbas, Gary E. Shoup, Darcy M. Bullock

JTRP Technical Reports

Modern traffic control systems are complex entities whose performance should be thoroughly quantified prior to deployment. However, many of the advanced features available with this control equipment, such as preemption and real-time control strategies, are typically proprietary in nature, and therefore not incorporated into standard simulation models. Since it is not desirable for the engineer to learn in a field environment, under live traffic conditions, this research presents a rational procedure for evaluating and validating such control strategies in a laboratory setting. This document explores three aspects of traffic signal systems, which include the advanced control settings for single controller …

Evaluation Of Lightweight Non-Contact Profilers, Amit Mondal, Adam J. Hand, David R. Ward

JTRP Technical Reports

Pavement smoothness was recently identified as the most significant factor the motoring public uses to judge the quality of our Nations roadways. A new generation of lightweight profilers has recently been developed, which have the potential of providing nearly instantaneous smoothness measurements, providing contractors with a tool to identify and address process control issues promptly and cost effectively. The new technology was co-operatively evaluated by a team of Purdue University and Indiana Department of Transportation (INDOT) researchers to assess the repeatability and reproducibility of the devices, as well as the potential for their use in Indiana. A successful field test …

Optimal Design Of Freeway Incident Response Systems, Raktim Pal, Kumares C. Sinha

JTRP Technical Reports

Several states have introduced service patrol programs to curb the growing adverse impacts of freeway incidents. An efficient patrol program configuration design is needed to ensure appropriate resource allocation. This research seeks to devise a scheme for determining optimally such system characteristics as hours of operation, fleet and crew sizes, dispatching policies, areas of operation, and routing patterns, so that the efficacy of the program is maximized. The interaction of randomly occurring incidents with time-varying traffic adds to the complexity of the problem. The problem is solved using dynamic simulation approaches combined with optimization techniques to incorporate the non-linear impact …

Performance Of Bridge Decks And Girders With Lightweight Aggregate Concrete, J. A. Ramirez, J. Olek, Eric Joseph Rolle, Brian J. Manlone

JTRP Technical Reports

Structural lightweight concrete is a very versatile material and Haydite and Minergy lightweight aggregates can be utilized in the mixture development of concrete for use in girders and decks in bridges. More widespread use of lightweight aggregates (LWA) would result in savings in construction cost due to considerable dead load reduction. The materials phase of this research study evaluated the fresh concrete properties (slump, unit weight, and air content), the mechanical properties of hardened concrete (compressive strength, tensile strength, flexural strength, static and dynamic modulus of elasticity, Poisson’s Ratio, and temperature development), and durability related parameters (air void distribution, freeze-thaw …

Providing Real-Time Traffic Advisory And Route Guidance To Manage Borman Incidents On-Line Using The Hoosier Helper Program, Srinivas Peeta, Jorge L. Ramos, Shyam Gedela

JTRP Technical Reports

This study addresses the issue of whether the message content of variable message signs (VMS) can be used as a control variable to favorably influence traffic conditions in real-time. The focus is on the level of detail of information displayed on the VMS, and not human factor issues. It implies an understanding of driver sensitivity to information content. Also, for real-time implementation, the displayed information should be consistent, timely, and reliable. A framework is developed for optimizing system performance under incidents using the VMS message content as the primary control parameter. It consists of: (i) an efficient control strategy to …

The Development Of A Speed Monitoring Program For Indiana, Darren L. Jorgenson, Kumares C. Sinha

JTRP Technical Reports

From the passage of the National Maximum Speed Limit (NMSL) of 55 mph in 1974 through its repeal in 1995 speed monitoring programs have been mandated by the federal government. The speed-monitoring program was primarily intended to provide reliable data to be included as a part of the State’s annual certification in order to be approved for Federal Aid highway projects. The repeal of the NMSL in 1995 not only authorized states to set their own speed limits, it also allowed states to develop their own speed monitoring programs. The goal of this research is to provide the framework for …

Bs News

Building Services Engineering

No abstract provided.

Second Phase Study Of Changes In In-Service Asphalt (Vol 2: Appendices), Khaled A. Galal, Thomas D. White, Adam J. Hand

JTRP Technical Reports

In response to the need to improve asphalt pavement performance, the Strategic Highway Research Program (SHRP) was initiated in 1987. Products from SHRP included performance-based specifications for asphalt binders and performance-based mix design tests and criteria for asphalt mixtures. The superpave asphalt binder specification addresses performance of in-service pavements for given environmental and traffic conditions. During the 1985 paving season in Indiana, the original asphalt binder and HMA (truck mix samples) from a number of pavements were sampled and retained. Cores were also taken from these pavements after seven or eight years of service. Conditions surveys were performed on these …

Second Phase Study Of Changes In In-Service Asphalt (Vol 1: Main Report), Khaled A. Galal, Thomas D. White, Adam J. Hand

JTRP Technical Reports

In response to the need to improve asphalt pavement performance, the Strategic Highway Research Program (SHRP) was initiated in 1987. Products from SHRP included performance-based specifications for asphalt binders and performance-based mix design tests and criteria for asphalt mixtures. The Superpave asphalt binder specification addresses performance of in-service pavements for given environmental and traffic conditions. During the 1985 paving season in Indiana, the original asphalt binder and HMA (truck mix samples) from a number of pavements were sampled and retained. Cores were also taken from these pavements after seven or eight years of service. Condition surveys were performed on these …

Wireless Local Area Network For Its Communications Using The 220 Mhz Its Spectral Allocation, J. V. Krogmeier, Ness Shroff

JTRP Technical Reports

The objective of this project was to design a radio architecture using the ITS spectral allocations in the 220-222 MHz Land Mobile band which provides a multi-mode operation optimized for point-to-point, mobile, and multiple access communications. A radio performance goal was to achieve greater than 3 bits/second/Hz transmission efficiency for mobile applications, and greater than a 5 bits/second/Hz transmission efficiency for point-to-point applications. An additional important goal of this project was to explore potential ITS applications of the modem technology particularly as applied to an application in sensor telemetry concentration. The fixed point modem will be deployed for remote surveillance …

Indiana Lane Merge System - Warrants For Use, Andrzej P. Tarko, Shyam Venugopal

JTRP Technical Reports

The entry to a work zone is critical for traffic smoothness and safety because of the discontinuation of one or more lanes. The Indiana Lane Merge System (ILMS) was designed to implement dynamic lane change control at work zone entries by encouraging drivers to switch lanes well upstream of the discontinuous lane taper, thereby reducing the number of aggressive lane changes at the taper. At the time of this research, the ILMS had not been implemented on a large scale at rural freeway work zones. The Indiana Department of Transportation (INDOT) wanted to do a complete safety and capacity evaluation …

Defects In Reinforced Concrete Due To Environmental Conditions And Concrete Treatment: A Case Study At The University Of Dar Es Salaam, A. Rubaratuka

Tanzania Journal of Engineering and Technology (TJET)

Concrete is produced by mixing together cement, water and aggregates (i. e. sand and coarse aggregates) in specified proportions. It can do well with compressive forces but it is very weak under tensile forces. To overcome this problem, steel reinforcement are normally added to produce reinforced concrete which can also withstand tensile forces. Experience shows that environmental conditions may have a negative impact on the durability of reinforced concrete structures resulting in development of defects if not properly assessed and appropriate measures adopted to arrest the same at the design and construction stages.

The severity of damages for the investigated …

Mathematical Modelling Of Road Bumps, E. S. Massawe

Tanzania Journal of Engineering and Technology (TJET)

In this paper, a general mathematical model that may be used for construction of a road bump on an inclined road is developed. It is shown that if the parameters for the inclination are set to zero, the resulting model reflects the special case of a flat road. Existing experiences are briefly highlighted and a case study was done on different locations along the University Road to demonstrate the developed model.

Evaluation Of Soil Conservation Measures: A Case Study In Mbinga District, Ruvuma Region, Tanzania, S. Y. Thadei

Tanzania Journal of Engineering and Technology (TJET)

A study on soil conservation measures was conducted in two villages, Tukuzi and Mahenge, in Mbinga District, Ruvuma Region, Tanzania. The results showed that the ngoro farming system was effective in controlling soil erosion by water on both steep and gentle slopes. Sediments collected from ngoro had high concentrations of plant nutrients such as available phosphorus (P), total nitrogen (N), organic carbon (OC) and exchangeable bases. This was probably due to nutrients released from decomposed grass bundles buried in the soil. In preventing soil erosion, ngoro and bench terraces were equally effective, while contour ditches were as effective as ridges …

Concrete Cracking In Coastal Areas, S. R. Mpinzire

Tanzania Journal of Engineering and Technology (TJET)

The paper discusses cracking and corrosion of reinforced concrete (RC) structures in coastal zones where aggressive action of salt burdened air is the primary cause of concrete deterioration. Case studies are presented, along with discussion of possible remedies including local demolition, reconstruction and epoxy injection as well as concrete treatment.

The Development Of Groundwater For Water Supply, C. F. Mhilu

Tanzania Journal of Engineering and Technology (TJET)

ABSTRACT This paper presents results of groundwater investigations carried out at Yombo Dovya Village, Temeke District in Dar es Salaam Region. The study has included hydrogeological and geoelectric resistivity sounding survey data obtained at the test site in Yombo village. The results of this investigation based on the application of vertical electrical sounding probe predictions have indicated the existence of reasonable amounts of groundwater resource for development. To verify these results borehole drilling tests were also conducted at the same site (Borehole No. DSM 79/99), and the results obtained by this method compares very well with those obtained earlier by …

The Behaviour Of Reinforced Block-Work Walls In Axial Tension, Laurent Shirima

Tanzania Journal of Engineering and Technology (TJET)

Reinforced blockwork with horizontally laid reinforcing bars is used for walls in liquid retaining structures in developing countries. This is the case where, the level of technology in terms of skills and equipment is not in a position to allow successful construction of reinforced concrete walls. Blockwork walls are very sensitive to cracking which cannot be prevented by reinforcement. The major problem for designers is the behaviour of such walls in tension caused by hydrostatic pressure of the stored liquid. This paper reports results of a research work to study the behaviour of reinforced blockwork walls in tension. It was …

Application Of Vibrational Techniques In Determination Of Dynamic Properties Of Agricultural Products-State Of The Arton Of Vibrational Techniques In Determination Of Dynamic Properties Of Agricultural Products-State Of The Art, Silas Kajuna

Tanzania Journal of Engineering and Technology (TJET)

Vibration is one of the techniques employed in the determination of dynamic properties of fruits and vegetables. It entails generation of a mechanical or acoustic vibrational signal which is propagated through the flesh of the agricultural material. A transducer is either attached or held close to the specimen to monitor the propagation of the signal through the specimen. The manner in which the signal is transmitted through the material is analyzed, and the dynamic properties of the specimen which relate to its firmness or its internal being are derived. The technique has been around for the past 30 years or …

Evaluation Of Extreme Wind Speeds In Relation To The Design Of Coastal Structures In Tanzania, Alfonse Dubi

Tanzania Journal of Engineering and Technology (TJET)

Five distribution functions, FT-I and Weibull with the exponent k = 0.75, 1.0, 1.4 and 2.0 respectively, have been applied to 25-year wind data collected between 1972 and 1996 at Tanga, Dar Es Salaam, Zanzibar and Mtwara Meteorological stations. One maximum value for every year from the full data record was drawn to constitute the annual maxima series for each station. For each of the stations, 2-, 50- and 100-year return wind speeds with corresponding 90% confidence intervals were computed. The distribution functions were fitted to the data by the Least Squares Method. Results from the study show that FT-I …

Bs News

Building Services Engineering

No abstract provided.

Bs News

Building Services Engineering

No abstract provided.

Water Resources Systems Analysis - Course Notes, A Bruce Bishop, Trevor Hughes, Mac Mckee

All ECSTATIC Materials

Water resources systems analysis course notes for CEE 6410 taught at Utah State University. Coverage includes:

Chapter 1 - Concepts and methods

Chapter 2 - Linear programming-introduction and graphical methods

Chapter 3 - Linear programming - simplex method

Chapter 4 - Linear programming - applications to simple water problems

Chapter 5 - Dual LP and post optimality analysis

Chapter 6 - Integer programming

Chapter 7 - More applications of integer programmign

Chapter 8 - Piecewise linearization

Chapter 9 - Other types of LP models

Chapter 10 - Dynamic programming

Chapter 11 - Gradient-based nonlinear optimization methods

Chapter 12 - Genetic …