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In response to the enactment by the U.S. Congress of the Intermodal Surface Transportation Efficiency Act (ISTEA), the Federal Highway Administration (FHWA) requested that the National Research Council (NRC) conduct a study on nonconventional concrete technology for renewal of the highway infrastructure. ISTEA directed the FHWA to initiate a comprehensive, long-range infrastructure research and development (R&D) program. Since current research in the field has tended to concentrate on modifications or refinements of traditional concrete technologies, the Office of Advanced Research of the FHWA requested the NRC undertake this study in order to access the broad expertise in materials science of the National Materials Advisory Board (NMAB) to help identify truly. | . -fir lonconventirfhak W ji 7 Ầ i Nonconventional Concrete Technologies Renewal of the Highway Infrastructure Committee on Nonconventional Concrete Technologies for Renewal of the Highway Infrastructure National Materials Advisory Board Commission on Engineering and Technical Systems National Research Council NMAB-484 National Academy Press Washington D.C. 1997 ii NOTICE The project that is the subject of this report was approved by the Governing Board of the National Research Council whose members are drawn from the councils of the National Academy of Sciences the National Academy of Engineering and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competencies and with regard for appropriate balance. This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences the National Academy of Engineering and the Institute of Medicine. The National Academy of Sciences is a private nonprofit self-perpetuating society of distinguished scholars engaged in scientific and engineering research dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863 the Academy has a mandate that requires it to advise the federal government on scientific and technical matters. Dr. Bruce Alberts is president of the National Academy of Sciences. The National Academy of Engineering was established in 1964 under the charter of the National Academy of Sciences as a parallel organization of outstanding engineers. It is autonomous in its administration and in the selection of its members sharing with the National Academy of Sciences the responsibility for advising the federal government. The National Academy of Engineering also sponsors engineering programs aimed at meeting national needs encourages education
