An Introduction to the Deep Mixing Methods as Used in Geotechnical Applications-Volume III: The Verification and Properties of Treated Ground

FHWA-RD-99-167

This report focuses on the properties of soils treated by the deep mixing method and aspects of quality control, quality assurance, and verification. The deep mixing method is an in situ soil treatment technology in which the soil is blended with cementitious and/or other materials.

Library and www.ntis.gov, PB2002-100376

Calcium Magnesium Acetate at a Lower Production Cost: Production of CMA Deicer From Cheese Whey

FHWA-RD-98-174

This report presents findings on the development of low-cost acetate deicers from cheap feedstocks, such as biomass and industrial wastes, via fermentation. Two methods to produce low-cost acetate deicers from cheese whey were studied. Calcium magnesium acetate deicers produced from cheese whey by fermentation and extraction were tested for their acetate content and deicing properties.

Library and www.ntis.gov, PB99-148991

Characterization of the Environment

FHWA-RD-00-030

This report looks at how the local environment affects the performance of eight coating systems and two weathering steels. It presents data gathered over a 5-year period from seven test sites across the United States. The study on which this report is based compiled data on both accelerated and natural exposure of coating and corrosion test panels and related their deterioration to environmental conditions.

www.ntis.gov, PB2000-108513

Corrosion Cost and Preventive Strategies in the United States, Final Report

FHWA-RD-01-156

This report describes the annual total cost of metallic corrosion in the United States and preventive strategies for optimum corrosion management. The total direct cost of corrosion is estimated at $276 billion a year, which is 3.1 percent of the 1998 U.S. gross domestic product.

Library and www.ntis.gov

Corrosion Inhibitors in Concrete: Interim Report

FHWA-RD-02-002

The overall objective of this work-in-progress is to assess the effectiveness of corrosion inhibitors for steel in concrete.

PDC Email: report.center@dot.gov

Corrosion Protection: Concrete Bridges

FHWA-RD-98-088

This report summarizes the progress of research on reducing premature corrosion of reinforcing steel on concrete bridges. The Federal Highway Administration established corrosion protection for concrete bridges as a high-priority area in its structures research program. The objectives of this research are to (1) to develop effective, economical methodologies for arresting or reducing the extent of steel corrosion from chloride contamination of concrete bridges, reducing bridge maintenance costs and minimizing traffic disruptions; and (2) to develop sound design and construction practices and materials for preventing corrosion of reinforcement in new structures, minimizing future deterioration.

www.fhwa.dot.gov/publications/research/infrastructure/structures/98088/index.cfm

Detection and Sizing of Cracks in Structural Steel Using the Eddy Current Method

FHWA-RD-00-018

This report documents the findings of research on applying the eddy current method to detect cracks in structural steel members of highway bridges. The report also describes the development and application of the eddy current method to detect hydrogen-assisted cracking through paint. The report will be of interest to bridge inspectors, engineers, and designers involved in inspecting and maintaining highway bridges.

www.fhwa.dot.gov/publications/research/infrastructure/structures/nde/0018.pdf

Development and Field Testing of Multiple Deployment Model Pile (MDMP)

FHWA-RD-99-194

This report analyzes the Multiple Deployment Model Pile (MDMP), developed as an in situ tool for site investigations. The MDMP instrumentation is capable of monitoring the pile/soil interaction throughout the life cycle of a driven pile.

Library and www.ntis.gov, PB2000-107845

Development of Protocols for Confined Extension/Creep Testing of Geosynthetics for Highway Applications

FHWA-RD-97-143

This report is part of a study in which various aspects of geosynthetic durability were addressed to develop procedures that could be used to predict long-term strength loss of geosynthetics used in highway applications. This information is essential to designers for allowing tensile capacity for geosynthetics used primarily in mechanically stabilized earth retaining walls, reinforced soil slopes, and stabilized foundations.

Durability Analysis of Aluminized Type 2 Corrugated Metal Pipe

FHWA-RD-97-140

In this report, conclusions from past research, the database, and present field studies are used to evaluate current durability prediction methods for aluminized type 2 corrugated metal pipe. Advantages and disadvantages of various culvert materials are discussed, with correlations drawn from the literature review and field studies.

www.fhwa.dot.gov/publications/research/infrastructure/hydraulics/97140/index.cfm

Effects of Geosynthetic Reinforcement Spacing on the Behavior of Mechanically Stabilized Earth Walls

FHWA-RD-03-048

This report presents the results of numerical analysis on the behavior of mechanically stabilized earth walls with modular block facing and geosynthetic reinforcement. The analysis considers the effects of reinforcement spacing, soil strength, reinforcement stiffness, connection strength, reinforcement length, secondary reinforcement layers, and foundation stiffness.

Abstract online: /www.fhwa.dot.gov/publications/publicroads/04jan/newpubs.cfm

Effects of Gradation and Cohesion on Bridge Scour, Volume 1: Effects of Sediment Gradation and Coarse Material Fraction on Clear Water Scour Around Bridge Piers

FHWA-RD-99-183

This report is part of a six-volume series describing laboratory experiments conducted at Colorado State University for the Federal Highway Administration as part of a study on the effects of sediment gradation and cohesion on bridge scour. Volume 1 describes the effects of sediment gradation and coarse material fraction on local clear water pier scour.

Library and www.ntis.gov, PB2000-103270

Effects of Gradation and Cohesion on Bridge Scour, Volume 2: Experimental Study of Sediment Gradation and Flow Hydrograph Effects on Clear Water Scour Around Circular Piers

FHWA-RD-99-184

This report is part of a six-volume series describing laboratory experiments conducted at Colorado State University for the Federal Highway Administration as part of a study on the effects of sediment gradation and cohesion on bridge scour. Volume 2 describes the effects of sediment gradation and flow hydrographs on local clear water pier scour.

Library and www.ntis.gov, PB2000-103271

Effects of Gradation and Cohesion on Bridge Scour, Volume 3: Abutment Scour for Nonuniform Mixtures

FHWA-RD-99-185

This report is part of a six-volume series describing laboratory experiments conducted at Colorado State University for the Federal Highway Administration as part of a study on the effects of sediment gradation and cohesion on bridge scour. Volume 3 describes the effects of sediment gradation and coarse material fraction on local abutment scour.

Library and www.ntis.gov, PB2000-103272

Effects of Gradation and Cohesion on Bridge Scour, Volume 4: Experimental Study of Scour Around Circular Piers in Cohesive Soils

FHWA-RD-99-186

This report is part of a six-volume series describing laboratory experiments conducted at Colorado State University for the Federal Highway Administration as part of a study on the effects of sediment gradation and cohesion on bridge scour. Volume 4 describes the effects of cohesive soils on local pier scour.

Library and www.ntis.gov, PB2000-103273

Effects of Gradation and Cohesion on Bridge Scour, Volume 5: Effect of Cohesion on Bridge Abutment Scour

FHWA-RD-99-187

This report is part of a six-volume series describing laboratory experiments conducted at Colorado State University for the Federal Highway Administration as part of a study on the effects of sediment gradation and cohesion on bridge scour. Volume 5 describes the effects of cohesion on local abutment scour.

Library and www.ntis.gov, PB2000-103274

Effects of Gradation and Cohesion on Bridge Scour, Volume 6: Abutment Scour in Uniform and Stratified Sand Mixtures

FHWA-RD-99-188

This report is part of a six-volume series describing laboratory experiments conducted at Colorado State University for the Federal Highway Administration as part of a study on the effects of sediment gradation and cohesion on bridge scour. Volume 6 describes the effects of stratified sand layers on local abutment scour.

Library and www.ntis.gov, PB2000-103275

Electrochemical Chloride Extraction: Influence of Concrete Surface on Treatment

FHWA-RD-02-107

This report reveals that electrochemical chloride extraction is capable of removing, in a single application, a significant portion of the chloride ions from a reinforced concrete structure. Prior research has shown that the quantity of chloride ions removed depends on numerous factors, including quantity and spacing of reinforcing steel, applied voltage, and initial chloride concentration. In addition, investigations into chloride binding and competition between other ions as current carriers have helped clarify the probable mechanisms responsible for decreases in current efficiency over time during chloride removal.

www.fhwa.dot.gov/publications/research/infrastructure/structures/02107/

Extrapolation of Pile Capacity From Non-Failed Load Tests

FHWA-RD-99-170

This report analyzes load testing. Load testing a static pile to failure is the ultimate way to examine the capacity and integrity of deep foundations. Since the procedure is expensive and time-consuming, it is often substituted by the application of a load to a certain factor (most often two) times the contemplated design load. This method is not preferred because only a proof test is carried out, while the ultimate capacity and actual factor of safety remains unknown. Therefore, researchers need to find an easier, accurate way to reliably estimate the ultimate bearing pile capacity for non-failed load tests.

Library and www.ntis.gov, PB2000-102368

FHWA Field Manual for Bridge Painting Inspection

FHWA-RD-98-084

This manual is a model for bridge paint inspectors on how to perform inspection duties properly. Given that most bridge paint work is done on existing steel, this manual is geared toward people working in the field on existing steel. Some principles also may apply to shop-painted steel, but shop painting may require additional considerations beyond the scope of this manual.

www.fhwa.dot.gov/publications/research/infrastructure/structures/98084/intro.cfm

Field Evaluation of a New Aluminum Alloy as a Sacrificial Anode for Steel Embedded in Concrete

FHWA-RD-98-058

This report evaluates the use of sacrificial cathodic protection for reinforced and prestressed concrete bridge members. Cathodic protection using impressed current is an accepted and common method of providing corrosion protection to steel in concrete. This study examined the performance of existing sacrificial alloys in different environments for sacrificial cathodic protection, and developed new sacrificial alloys for protecting steel in concrete.

www.ntis.gov, PB98-147135

Galvanic Cathodic Protection of Reinforced Concrete Bridge Members Using Sacrificial Anodes Attached by Conductive Adhesives

FHWA-RD-99-112

This report investigates the feasibility of using galvanic cathodic protection of reinforced concrete bridge members using sacrificial anodes attached by conductive adhesives.

Library and www.ntis.gov, PB99-175531

Geotechnical Publications

FHWA-RD-00-167

This report presents a list of publications based on research conducted by the geotechnical team in the Federal Highway Administration (FHWA) Office of Infrastructure Research and Development. This report also collates, categorizes, and integrates geotechnical information developed by other FHWA units, and complements and aids in the implementation of geotechnical research outputs.

GRS Bridge Piers and Abutments

FHWA-RD-00-038

This report discusses three projects on load testing of geosynthetic-reinforced soil bridge abutments and piers. They include (1) a full-scale bridge-pier load test conducted by the Federal Highway Administration's Turner-Fairbank Highway Research Center in 1996 (referred to as the Turner-Fairbank pier); (2) a full-scale, long-term load test of a bridge abutment and bridge pier conducted by the Colorado Department of Transportation and the University of Colorado at Denver from 1996 to 1997 (referred to as the Havana Yard piers and abutment); and (3) a production bridge abutment load test conducted in Black Hawk, CO, in 1997 (referred to as the Black Hawk abutment).

Library and www.ntis.gov, PB2001-103487

High-Performance Concrete in Washington State SR 18/SR 516 Overcrossing: Interim Report on Girder Monitoring

FHWA-RD-00-070

This report presents results of research on the effectiveness of using high-performance concrete (HPC) on prestressed precast concrete girders on a bridge in Washington State. The Federal Highway Administration established a program to demonstrate the positive effects of using HPC on bridges in the mid-1990s.

www.fhwa.dot.gov/publications/research/infrastructure/structures/00070.pdf

High-Performance Concrete in Washington State SR 18/SR 516 Overcrossing: Interim Report on Materials Tests

FHWA-RD-00-071

This report presents preliminary results from the first year of the materials testing program of the high-performance concrete (HPC) mix used in prestressed precast concrete girders on a bridge in Washington State. The Federal Highway Administration established a program to demonstrate the positive effects of using HPC on bridges in the mid-1990s.

www.fhwa.dot.gov/publications/research/infrastructure/structures/00071.pdf

Highway Bridge Inspection: State-of-the-Practice Survey

FHWA-RD-01-033

This report presents the findings of a survey conducted to determine current policies and practices that may affect the accuracy and reliability of visual inspection of bridges. The objectives of the survey were to compile a state-of-the-practice report for bridge inspection, gather information on bridge inspection management to study how it may influence the reliability of inspections, and gather data on the use of nondestructive evaluation technologies to identify research needs.

Library and www.fhwa.dot.gov/publications/research/nde/01033.cfm

Hydraulics of Dale Boulevard Culverts

FHWA-RD-01-095

This report summarizes model testing performed on a prototype culvert to address an objective of a Federal Emergency Management Agency (FEMA) study to determine the base flood elevation upstream of the culvert. A performance curve was developed for the culvert to increase the accuracy of the FEMA study.

https://www.fhwa.dot.gov/engineering/hydraulics/research/pdf/11.pdf

Hydraulics of Iowa DOT Slope-Tapered Pipe Culverts

FHWA-RD-01-077

This report updates the Iowa Department of Transportation design procedures for circular, slope-tapered concrete culverts. The current practice is to use the design coefficients for a square-edged, circular concrete culvert with a headwall in the Federal Highway Administration's Hydraulic Series No. 5 (HDS-5). In this study, new inlet control design constants and entrance loss coefficients were calculated for the slope-tapered culverts and compared with the HDS-5 coefficients.

https://www.fhwa.dot.gov/publications/research/infrastructure/hydraulics/01077/index.cfm

Infrastructure/Bridge Design and Construction: Volume I, Current Practice and Limiting Equilibrium Analysis

FHWA-RD-98-065

This report is part of a four-volume series. It presents research on improving the design and construction of permanent ground anchor walls. The research focused on tieback soldier beam walls for highway applications. These walls generally are less than 7.6 meters (25 feet) high, and are supported by one or two rows of permanent ground anchors. Volume I presents apparent earth pressure methods for determining the lateral earth load.

Infrastructure/Bridge Design and Construction: Volume II, Full-Scale Wall Tests and Soil-Structure Interaction Model

FHWA-RD-98-066

This report is part of a four-volume series. It presents research on improving the design and construction of permanent ground anchor walls. The research focused on tieback soldier beam walls for highway applications. These walls generally are less than 7.6 meters (25 feet) high, and are supported by one or two rows of permanent ground anchors. Volume II presents the results of research on a 7.6-meter- (25-foot-) high wall constructed in medium-dense sand, and the development of a numerical model to be implemented in a computer program for the design of soldier beams.

Infrastructure/Bridge Design and Construction: Volume III, Model-Scale Wall Tests and Ground Anchor Tests

FHWA-RD-98-067

This report is part of a four-volume series. It presents research on improving the design and construction of permanent ground anchor walls. The research focused on tieback soldier beam walls for highway applications. These walls generally are less than 7.6 meters (25 feet) high, and are supported by one or two rows of permanent ground anchors. Volume III presents the results of research on four model-scale soldier beam and lagging walls constructed in medium-dense sand, and the results of tests performed on 10 hollow-stem-augured ground anchors installed in fine-grain soil.

Infrastructure/Bridge Design and Construction: Volume IV, Conclusions and Recommendations

FHWA-RD-98-068

This report is part of a four-volume series. It presents research on improving the design and construction of permanent ground anchor walls. The research focused on tieback soldier beam walls for highway applications. These walls generally are less than 7.6 meters (25 feet) high, and are supported by one or two rows of permanent ground anchors. Volume IV presents major conclusions, research needs, and recommendations for implementing the research results.

Introduction to the Deep Soil Mixing Methods as Used in Geotechnical Applications, Volume I: Final Report

FHWA-RD-99-138

This report traces the historical development of the various proprietary deep mixing methods for soil and provides a structured summary of applications. The deep mixing method is an in situ soil treatment technology in which the soil is blended with cementitious and/or other materials.

Library and www.ntis.gov, PB2000-103676

Laboratory and Test-Site Testing of Moisture-Cured Urethanes on Steel in Salt-Rich Environment

FHWA-RD-00-156

This report evaluates three-coat, moisture-cured (MC) urethane commercial products formulated for protecting new steel (SSPC-SP 10) and power tool-cleaned steel (SSPC-SP 3) surfaces against corrosion. The total coating film thickness was about 75 microns. Zinc-rich MC-urethane primers were used for SSPC-SP 10 steel surfaces, while the primers for SSPC-SP 3 surfaces contained no or a small amount of zinc. The same midcoats and topcoats were used for both steel surfaces.

http://isddc.dot.gov/OLPFiles/FHWA/009914.pdf

Laboratory Evaluation of Waterborne Coatings on Steel

FHWA-RD-03-032

This report presents findings from a Federal Highway Administration in-house study investigating the performance of waterborne acrylic, epoxy, and polyurethane coatings on new steel surfaces. Both cyclic laboratory tests and outdoor marine exposure were used to evaluate the performance of a variety of commercial waterborne products and compare them to zinc-rich coatings. This report also presents the effect of chemical properties of primers on coating performance.

www.fhwa.dot.gov/publications/research/infrastructure/structures/03032/

Long-Term Durability of Geosynthetics Based on Exhumed Samples from Construction Projects

FHWA-RD-00-157

This report presents the results of mechanical and chemical tests on 24 retrieved geosynthetics from 12 sites across the United States. It provides a baseline databank of the mechanical and chemical properties of many commonly used geosynthetics in transportation applications. The report also provides a summary and synthesis of the results and methods from site retrievals and comments on the significance of laboratory index testing in developing durability design protocols.

Library and www.ntis.gov, PB2001-105580

Magnetic-Based NDE of Prestressed and Post-Tensioned Concrete Members-The MFL System

FHWA-RD-00-026

This report describes a study to develop a nondestructive evaluation system based on the concept of magnetic flux leakage to detect corrosion and fracture of prestressed steel in pretensioned and post-tensioned concrete bridge members.

Library

Materials and Methods for Corrosion Control of Reinforced and Prestressed Concrete Structures in New Construction

FHWA-RD-00-081

Salt-induced reinforcing steel corrosion in concrete bridges is an economic burden to many State and local transportation agencies. The adoption of corrosion-protection measures-such as the use of good design and construction practices, adequate concrete cover depth, low-permeability concrete, corrosion inhibitors, and coated reinforcing steel-is significantly reducing the occurrence of corrosion in new bridges. This report summarizes the results of various studies to develop and evaluate the performance of corrosion protection systems. It describes materials and measures that can be used to control corrosion in new construction of reinforced and prestressed concrete bridge structures.

Library and www.fhwa.dot.gov/publications/research/infrastructure/structures/00081.pdf

Model Site-Specific Worker Training/Orientation Program: Bridge Lead Removal and General Site Safety

FHWA-RD-98-179

This report provides a model training program for personnel working on bridges containing lead-coated surfaces. It is designed to ensure that the work is completed in a safe and efficient manner, and that all workers are able to recognize and avoid hazards that can lead to injuries or fatalities.

www.fhwa.dot.gov/publications/research/infrastructure/structures/98179/title.cfm

Modern Computational Environment for Seismic Analysis of Highway Bridges

FHWA-RD-99-114

This report describes the architecture, design, and implementation of ALADDIN, a new high-level scripting language and tool kit for interactive matrix and finite element analyses of structures. In ALADDIN, finite element computations are viewed as a specialized form of matrix computation, matrices are viewed as rectangular arrays of physical quantities, and numbers are viewed as dimensionless physical constants.

Library and www.ntis.gov, PB2000-102375

Modification of Highway Air Pollution Models for Complex Site Geometries, Volume I: Data Analysis and Model Development

FHWA-RD-02-036

This report is Volume I of a two-volume study to improve air pollution dispersion models for depressed highway sites. The study assesses limitations of flat terrain and other street-canyon air pollution models. Experimental results from other documented field and atmospheric wind tunnel tests, supplemented by tests conducted during this study, led to improved concepts and quantification of airflow dynamics for depressed sites.

www.fhwa.dot.gov/publications/research/infrastructure/structures/02036/index.cfm

Modification of Highway Air Pollution Models for Complex Site Geometries, Volume II: Wind Tunnel Test Program

FHWA-RD-02-037

This report is Volume II of a two-volume study to increase the scope and clarity of air pollution models for depressed highway and street canyon sites. The report presents the atmospheric wind tunnel program conducted to increase the database and improve physical concepts of pertinent movement and mixing of air and its contaminants. Wind tunnel measurements are less costly than field measurements and are sensitive to controlled input variables.

www.fhwa.dot.gov/publications/research/infrastructure/structures/02036/index.cfm

Optimization of Concretes and Repair Materials for Corrosion Resistance

FHWA-RD-99-096

This report addresses 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.

www.ntis.gov, PB99-175564

Performance Test for Geosynthetic-Reinforced Soil Including Effects of Preloading

FHWA-RD-01-018

This report presents a study undertaken to investigate the behavior of geosynthetic-reinforced soil (GRS) masses under various loading conditions and to develop a simplified analytical model to predict deformation characteristics of a generic GRS mass. Significant emphasis was placed on the effects of preloading. To conduct this study, a revised laboratory test, known as the soil-geosynthetic performance test, was developed.

https://www.fhwa.dot.gov/publications/research/infrastructure/structures/gtr/01018/index.cfm

Pipe Interaction With the Backfill Envelope

FHWA-RD-98-191

This report summarizes a study of installation practices for buried (culvert) pipes. Current practice was reviewed through a literature search and a survey of users, manufacturers, and others involved in the use of buried pipes.

Library and www.ntis.gov, PB99-153603

Portable Instrumentation for Real-Time Measurement of Scour at Bridges

FHWA-RD-99-085

This report analyzes a portable scour-measuring system developed to meet the requirements of three different applications: bridge inspections, limited-detail data collection, and detailed data collection. Commercially available instruments were evaluated for use in measuring scour at bridges during floods. The systems developed consist primarily of commercially available instruments, which were modified and interfaced to achieve the required functionality.

www.ntis.gov, PB2001-102040

Rehabilitation of Prestressed Concrete Bridge Components by Non-Electrical (Conventional) Methods

FHWA-RD-98-189

This report presents a technology review, field surveys, and laboratory investigations to examine the corrosion of highway bridge elements made from prestressed concrete. Conventional methods used to repair these structures were also addressed.

Library and www.ntis.gov, PB99-148975

Reliability of Visual Inspection for Highway Bridges, Volume I: Final Report

FHWA-RD-01-020

This report provides overall measures of the accuracy and reliability of routine and in-depth visual inspections of highway bridges, the influence of several key factors that affect routine and in-depth inspections, and the differences between State inspection procedures and reports.

www.fhwa.dot.gov/publications/research/nde/01020.cfm

Reliability of Visual Inspection for Highway Bridges, Volume II: Appendices

FHWA-RD-01-021

The report provides overall measures of the accuracy and reliability of routine and in-depth visual inspections of highway bridges, the influence of several key factors that affect routine and in-depth inspections, and the differences between State inspection procedures and reports. This document presents the appendices.

www.fhwa.dot.gov/publications/research/nde/01020.cfm

Remote Methods of Underwater Inspection of Bridge Structures

FHWA-RD-99-100

This report analyzes a portable trailer-mounted bridge scour inspector. It was developed for inspecting bridge scour in the vicinity of piers from bridge decks and tested under flood conditions.

Library and www.ntis.gov, PB99-157968

Safety and Health on Bridge Repair, Renovation, and Demolition Projects

FHWA-RD-98-180

This report is a reference guide for bridge contractors to use in designing and implementing a safety and health program. It is not a "fill-in-the-blanks" document for contractors to use as a means to claim that a safety and health program is in effect. Instead, it guides contractors through the elements and issues that must be considered in establishing a safety and health program.

www.fhwa.dot.gov/publications/research/infrastructure/structures/98180/titlepg.cfm

Seismic Vulnerability of New Highway Construction, Executive Summary

FHWA-RD-99-098

This executive summary provides an overview of the results from a Federal Highway Administration seismic research program that performed a series of special studies addressing the seismic vulnerability of new highway structures. The studies developed technical information that could form the basis of future specifications for the seismic design of bridges.

Abstract online: www.fhwa.dot.gov/publications/publicroads/02jul/newpubs.cfm

South Dakota Culvert Inlet Design Coefficients

FHWA-RD-01-076

This report summarizes model testing performed on culvert shapes to develop design coefficients for both inlet and outlet control. The cast-in-place culverts feature 30-degree flared wingwalls and a beveled top edge. The precast culverts have a 0-degree flare and a constant 101.6-millimeter (4-inch) bevel (regardless of barrel size) along the top of the wingwalls and the top edge of the culvert entrance. The most efficient configuration tested was the model of the cast-in-place box culvert.

www.fhwa.dot.gov/publications/research/infrastructure/hydraulics/01076/index.cfm

Stress Cracking Potential for HDPE Geogrids

FHWA-RD-97-142

This report describes the development of a testing protocol designed to measure the potential for stress cracking of high-density polyethylene (HDPE) geogrids used for soil reinforcement. The collected data demonstrate that local stress cracking in the unoriented transverse node of HDPE geogrids can occur as a result of construction-induced damage. Undamaged geogrids are not prone to stress cracking at load levels below their 100-year limiting creep load.

PDC Email: report.center@dot.gov

Supplemental Reference Appendices for An Introduction to the Deep Mixing Methods as Used in Geotechnical Applications, Volume II: Appendices

FHWA-RD-99-144

This report traces the historical development of the various proprietary deep soil mixing methods and provides a structural summary of applications. It also compares the applicability of the deep mixing method with other competitive forms of ground treatment and improvement. The deep mixing method is an in situ soil treatment technology in which the soil is blended with cementitious and/or other materials.

Library and www.ntis.gov, PB2002-100376

Techniques for Measuring Existing Long-Term Stresses in Prestressed Concrete Bridges, Volume 1: Analytical, Laboratory, and Field Studies

FHWA-RD-99-178

This report 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.

Library and www.ntis.gov, PB2000-100278

The November 1999 Duzce Earthquake: Post-Earthquake Investigation of the Structures on the TEM

FHWA-RD-00-146

This report is based on a reconnaissance survey of bridge and tunnel sites along the Trans-European Motorway segment under construction near Bolu, Turkey, after the Duzce Earthquake.

www.fhwa.dot.gov/publications/research/infrastructure/structures/00146.pdf

User's Manual for BRI-STARS (Bridge Stream Tube Model for Alluvial River Simulation)

FHWA-RD-99-190

This user's manual on BRI-STARS (Bridge Stream Tube Model for Alluvial River Simulation) provides a theoretical background on the methodologies used by the model, as well as the formulations of governing flow and sediment routing procedures. Example applications and practical guidelines for using the model are presented.

Library and www.ntis.gov, PB2000-107372

User's Primer for BRI-STARS (Bridge Stream Tube Model for Alluvial River Simulation)

FHWA-RD-99-191

This user's primer provides a brief description of BRI-STARS (Bridge Stream Tube Model for Alluvial River Simulation), installation and operations guidelines, the use of various utility programs in the package, and an example application of the model. BRI-STARS is a generalized, semi-two-dimensional water and sediment routing model with an integrated graphical interface for solving complicated river engineering problems with limited data and resources.

Library and www.ntis.gov, PB2000-107371