Featuring developments in Federal highway policies, programs, and research and technology.
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|Federal Highway Administration > Publications > Public Roads > Vol. 63· No. 6 > Recent Publications|
Compiled by Zac Ellis of FHWA's Office of Research and Technology Services
Below are brief descriptions of the reports recently published by the Federal Highway Administration's (FHWA) Office of Research, Development, and Technology. All the publications are available from the National Technical Information Service (NTIS). In some cases, limited copies of the publication are available from the Research and Technology (R&T) Report Center.
When ordering from NTIS, include the NTIS PB number (or publication number) and the publication title. You may also visit the NTIS Web site at http://www.ntis.gov to order publications online. For customers outside the United States, Canada, and Mexico, the cost is double the listed price. Address requests to:
National Technical Information Service
5285 Port Royal Road
Springfield, VA 22161
Telephone: (703) 605-6000
Requests for items available from the R&T Report Center should be addressed to:
RD&T Report Center, HRTS
Federal Highway Administration
9701 Philadelphia Court, Unit Q
Lanham, MD 20706
Telephone: (301) 577-0906
For more information on research and technology publications coming from FHWA, visit the Turner-Fairbank Highway Research Center's (TFHRC) Web site at http://www.fhwa.dot.gov/research/tfhrc/, FHWA's Web site at http://www.fhwa.dot.gov, or the OneDOT information network at http://dotlibrary.dot.gov/.
Assessment of Highway Particulate Impacts: Phase I, Tasks B and C - Field Sampling and Evaluation Program, Final Report
Publication No. FHWA-RD-99-181
This report is the second of two reports developed as part of Phase I of the study. Researchers wanted to investigate four sources of highway particulate emission: (1) emissions from diesel-powered vehicles, (2) emissions from road sanding and salting operations, (3) dust from paved roadways, and (4) emissions from unpaved roadways.
This document outlines the sampling and analysis plan for increasing the knowledge related to particulate emissions from three of these sources. The document describes the criteria used to select the field sampling sites, as well as the types of analyses that were performed at those sites. In addition, this document describes the results from the field work component of the study.
The NTIS number is PB99-175713; the cost is $33 for a paper copy or $17 for the report on microfiche.
Assessment of Highway Particulate Impacts: Phase I, Task A - Problem Evaluation, Final Report
Publication No. FHWA-RD-99-180
This work was performed during the first phase of the study. The report provides an assessment of highway particulate impacts. It evaluates the existing state of knowledge related to: (1) what the sources of the particulates are, especially those specific to highways; (2) methods of assessing particulate impacts from highway sources; (3) relationships between highway-derived particulates and other particulate sources; (4) particulate instrumentation, measurement, and monitoring methods; (5) assessment of potential public health risks; and (6) control strategies for lessening the impact of highway particulates.
Researchers evaluated sources, such as diesel and spark ignition engine emissions, tire and brake wear, resuspensions from road sanding and salting operations, and unpaved roads. Models evaluated included dispersion, source/receptor, and emissions modeling.
The NTIS number is PB99-175705; the cost is $36 for a paper copy or $17 for the report on microfiche.
Techniques for Measuring Existing Long-Term Stresses in Prestressed Concrete Bridges,
Volume 2: Manual of Instruction
Publication No. FHWA-RD-99-179
In this study, researchers evaluated various techniques for measuring stress. The evaluation included a state-of-the-art review and analytical study of existing techniques.
Based on analytical results, researchers chose to evaluate the flat-jack direct stress measurement technique in the laboratory and in field tests. An instruction manual was written to describe the equipment and procedures required to obtain reliable direct stress measurements. This manual outlines the equipment and techniques used in taking stress measurement readings. In addition, techniques for data analysis are explained.
The NTIS number is PB2000-100279; the cost is $25.50 for a paper copy or $12 for the report on microfiche.
Techniques for Measuring Existing Long-Term Stresses in Prestressed Concrete Bridges,
Volume 1: Analytical, Laboratory, and Field Studies
Publication No. FHWA-RD-99-178
This volume summarizes the analytical, laboratory, and field studies performed to evaluate the feasibility of the flat-jack direct stress measurement technique to be used on prestressed concrete bridges. Several strain relief methods, including boring and slitting techniques, were evaluated by performing analytical studies. The flat-jack slitting technique was determined to be the most promising.
The NTIS number is PB99-100278; the cost is $58 for a paper copy or $23 for the report on microfiche.
LTPP Pavement Maintenance Materials: SHRP Crack Treatment Experiment, Final Report
Publication No. FHWA-RD-99-143
The Strategic Highway Research Program (SHRP) H-106 maintenance experiment and the FHWA Long-Term Monitoring (LTM) of the Pavement Maintenance Materials Test Sites project studied two distinct asphalt concrete (AC) crack treatments: transverse crack sealing and longitudinal crack filling. Both activities are performed frequently to extend pavement life by preventing or substantially reducing the infiltration of water into the pavement structure.
The report documents the entire AC crack treatment study, including the installation of 31 unique crack treatments at five different test sites, the laboratory testing of experimental sealant/filler materials, and the seven-year performance monitoring of the various crack treatments. It also discusses the results of comprehension statistical analyses conducted on material performance and laboratory testing data.
The NTIS number is PB2000-102371; the cost is $51 for a paper copy and $21 for the report on microfiche.
LTPP Pavement Maintenance Materials: SHRP Joint Reseal Experiment, Final Report
Publication No. FHWA-RD-99-142
Although joint resealing is a common maintenance practice, premature seal failure happens frequently and leads to additional repair and expense. The purpose of this study was to address the merits and deficiencies of current joint resealing materials, designs, and practices.
The study evaluated the relative performance of selected sealant materials and the effect of selected sealant installation methods. The study also identified sealant material properties and tests that correlate well with field performance. This report documents the entire portland cement concrete joint resealing study, including the installation of 31 unique joint seal treatments (i.e., combinations of sealant material and installation method) at five different test sites, the laboratory testing of experimental sealant materials, and the seven-year performance monitoring of the various joint seal treatments.
The NTIS number is PB2000-102370; the cost is $41 for a paper copy or $17 for the report on microfiche.
Galvanic Cathodic Protection of Reinforced Concrete Bridge Members Using Sacrificial Anodes Attached by Conductive Adhesives
Publication No. FHWA-RD-99-112
This is the final report in a study to investigate the feasibility of using galvanic cathodic protection (CP) of reinforced concrete bridge members using sacrificial anodes attached by conductive adhesives.
Galvanic CP systems have the recognized advantages of simplicity and the potential to operate with little or no maintenance for the life of the system. However, applications have so far been limited to the seawater splash and tidal zone where concrete is moist and conductive and where the anode surface is periodically wetted. In this study, a new galvanic CP system was investigated in which sacrificial anodes were attached to the concrete surface with ionically conductive adhesives called hydrogels.
The NTIS number is PB99-175531; the cost is $27 for a paper copy or $12 for the report on microfiche.
Optimization of Concretes and Repair Materials for Corrosion Resistance
Publication No. FHWA-RD-99-096
A major cause of concrete deterioration (cracking, delamination, and spalling) is the corrosion of embedded steel reinforcement, initiated by chloride ions from deicing and saltwater spray that have penetrated the concrete cover. The research was structured to address the three principal-rate phenomena that control corrosion-induced deterioration of concrete bridge components: (1) chloride permeation rate, (2) corrosion rate of the steel bar, and (3) deterioration/damage rate.
The NTIS number is PB99-175564; the cost is $41 for a paper copy or $17 for the report on microfiche.
Determination of Frost Penetration in LTPP Sections, Final Report
Publication No. FHWA-RD-99-088
The main goal of the study was to determine frost penetration at selected LTPP Seasonal Monitoring Program sections. As part of the study, an interactive computer program, FROST, was developed to facilitate the interpretation of the electrical resistivity and temperature data. Analysis results include the freeze state at each electrical resistivity sensor and the frost penetration at each site.
The NTIS number is PB2000-102952; the cost is $36 for a paper copy or $17 for the report on microfiche.
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