Durability of High Performance Concrete
The freeze-thaw durability and the resistance to chloride penetration of high performance concrete (HPC) developed for highway applications were investigated. This paper summarizes the...

An Evaluation of the Strategic Highway Research Project Packing Handbook
The objective of this paper is to present the use of the November 8, 1991 SHRP C-206 report entitled `Packing Handbook - A Guide to the Optimal Gradation of Concrete Aggregates'. The purpose...

Early Field Experience with SUPERPAVE
Specific pavement studies of newly constructed, reconstructed or rehabilitated (resurfaced) pavement sections were used to provide an estimate of the relative influence of key pavement...

Changes to the AASHTO Guide for Design of Pavement Structures
At this juncture of the SHRP-LTPP program, it is appropriate to discuss the potential impacts that SHRP-LTPP results could have on the future AASHTO Guides for the Design of Pavement Structures....

Infrastructure Damage Modeling with GIS
This paper describes the use of a geographic information system to model damage to a municipal water distribution system. In a demonstration application detailed attribute data on components...

Taking the Pain out of the Punch List
Lengthy punch lists mean trouble for everyone involved, from the owner to the designer to the contractor, but the punch list doesn't have to be long and it doesn't...

The Proof is in the Pavement
A technique known as statistical quality assurance (SQA) lets DOTs quantify pavement quality by setting statistical guidelines for the work they will accept. SQA is a distinct departure...

Plastic Potential
Some 220,000 tons of epoxy-coated steel has been used in the construction of bridge decks since 1987, but some have raised questions about its long-term durability. New materials for prestressing...

Assessment and Repair of Fire-Damaged Concrete Structures
Concrete, even though it may be the most fire-resistant of all the major building materials, can be damaged by fire. Seldom does even a major fire cause total destruction, however, most...

Use of High Strength By-Product Gypsum Bricks in Masonry Construction
A new research aimed at producing high strength masonry bricks to be bonded with several types of joint materials other than conventional cement mortar, is introduced in this paper. This...

Use of CLSM Fly Ash Slurry for Underground Facilities
This paper presents the results of research performed in developing and using flowable fly ash slurry which falls under the classification of Controlled Low Strength Material (CLSM) as...

Properties of Bottom Ash-Based Composite
High-calcium bottom ash, a by-product of the electric power industry, was evaluated for feasibility of use as a fine aggregate in structural grade concrete. Both fresh and hardened properties...

Digital Image Processing and Analysis in Materials Science (Keynote Lecture)
This discussion presents a generic overview of computer aided imaging in materials science. Some of the questions to be answered are: Does the computer perceive the same things that I...

Digital-Image-Based Computer Modelling of Cement-Based Materials
Understanding the relationships among materials, processing, microstructure, and properties is critical in improving material design. This paper outlines an approach for furthering this...

Characterization of Man-Made Vitreous Fibers by Image Analysis
This paper deals with the characterization of man-made vitreous fibers (MMVF), seen as an application of the techniques of image analysis and mathematical morphology. We present the whole...

Morphological Methods for Characterizing Inter-feature Distances
Characterizing inter-feature distances in digital images using automatic image analysis systems presents problems not found when quantifying the morphology of the features themselves....

Estimates of Permeability of Porous Materials Using Image Analysis of Cross Sections
We have developed an image processing method for characterizing the pore structure of porous materials such as rock and concrete, to provide a means for understanding the dependence of...

A Chemical Image Analysis Procedure as a Method for a Quantitative Modal Analysis of Clinker Minerals
In a chemical image analysis procedure, the specimen is analyzed in a scanning electron microscope in backscatter mode, thus providing an atomic number contrast. The phases are segmented...

Application of Radar Imaging Techniques to Concrete
Wideband radar imaging techniques have the potential of being a powerful tool in detecting steel reinforcing bars and delaminations inside concrete. The success of the method as a nondestructive...

Ground Penetrating Radar: Images of Subsurface Characteristics
Ground penetrating radar has not been widely used for subsurface exploration in Civil Engineering. This paper describes the experimental setup used to explore ground penetrating radar...

 

 

 

 

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