Browse All Topics

Transportation

Transportation : Materials
NCHRP Report 639: Adhesive Anchors in Concrete Under Sustained Loading Conditions

TRB's National Cooperative Highway Research Program (NCHRP) Report 638: Guidelines for Guardrail Implementation explores guidance on selecting the appropriate barrier performance level for the installation of longitudinal barriers.



The following appendices to NCHRP Report 638 are ...

More
NCHRP Report 626: NDT Technology for Quality Assurance of HMA Pavement Construction

TRB's National Cooperative Highway Research Program (NCHRP) Report 626: NDT Technology for Quality Assurance of HMA Pavement Construction explores the application of nondestructive testing (NDT) technologies in the quality assurance of hot-mix asphalt (HMA) pavement construction. Supplementary material to NCHRP ...

More
NCHRP Report 628: Self-Consolidating Concrete for Precast, Prestressed Concrete Bridge Elements

TRB's National Cooperative Highway Research Program (NCHRP) Report 628: Self-Consolidating Concrete for Precast, Prestressed Concrete Bridge Elements explores recommended guidelines for the use of self-consolidating concrete (SCC) in precast, prestressed concrete bridge elements. The report examines the selection of constituent ...

More
NCHRP Report 621: Acceptance Tests for Surface Characteristics of Steel Strands in Prestressed Concrete

TRB's National Cooperative Highway Research Program (NCHRP) Report 621: Acceptance Tests for Surface Characteristics of Steel Strands in Prestressed Concrete explores tests to identify and measure residues on the surface of steel pre-stressing strands and to establish thresholds for residue ...

More
NCHRP Report 629: Ruggedness Testing of the Dynamic Modulus and Flow Number Tests with the Simple Performance Tester

TRB's National Cooperative Highway Research Program (NCHRP) Report 629: Ruggedness Testing of the Dynamic Modulus and Flow Number Tests with the Simple Performance Tester examines ruggedness testing that was conducted with a simple performance tester for the dynamic modulus and ...

More
NCHRP Synthesis 381: Falling Weight Deflectometer Usage

TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 381: Falling Weight Deflectometer Usage examines usage by state departments of transport of the falling weight deflectometer (FWD) to measure pavement deflections in response to a stationary dynamic load, similar to a ...

More
NCHRP Report 603: Transfer, Development, and Splice Length for Strand/Reinforcement in High-Strength Concrete

TRB's National Cooperative Highway Research Program (NCHRP) Report 603: Transfer, Development, and Splice Length for Strand/Reinforcement in High-Strength Concrete explores recommended revisions to the American Association of State Highway and Transportation Officials Load and Resistance Factor Design (LRFD) Bridge Design ...

More
NCHRP Report 614: Refining the Simple Performance Tester for Use in Routine Practice

TRB's National Cooperative Highway Research Program (NCHRP) Report 614: Refining the Simple Performance Tester for Use in Routine Practice explores the develop of a practical, economical simple performance tester (SPT) for use in routine hot-mix asphalt (HMA) mix design and ...

More
NCHRP Report 567: Volumetric Requirements for Superpave Mix Design

TRB's National Cooperative Highway Research Program (NCHRP) Report 567: Volumetric Requirements for Superpave Mix Design examines whether changes to the recommended Superpave mix design criteria for voids in mineral aggregate, voids filled with asphalt, and air voids content might further ...

More
NCHRP Report 557: Aggregate Tests for Hot-Mix Asphalt Mixtures Used in Pavements

TRB's National Cooperative Highway Research Program (NCHRP) Report 557: Aggregate Tests for Hot-Mix Asphalt Mixtures Used in Pavements examines performance-based procedures to test aggregates for use in pavements utilizing hot-mix asphalt (HMA) mixtures and provides guidance on using these procedures ...

More