Concrete Technology for Transportation Applications (2019) / Chapter Skim
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5 Background In recent years many advances have been made in concrete ingredients and mixtures, including admixtures, and supplementary cementitious materials (SCMs) that allowed the development of new concrete technologies and improvement of existing technologies for deployment in transportation infrastructure.
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6 Concrete Technology for Transportation Applications many power generating plants are converting from coal to gas as fuel, the potential shortage of fly ash is prompting departments of transportation (DOTs) to modify their concrete specifications to allow more use of alternative SCMs such as slag, silica fume, and metakaolin.
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Introduction 7 Ultrahigh-Performance Concrete: UHPC is a mixture that includes portland cement, SCMs, well-graded fine sand, a high dosage of fiber reinforcement (usually steel) , as well as superplasticizers and other admixtures, and has a very low water–cement ratio.
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8 Concrete Technology for Transportation Applications Task 1: Literature Review The literature review synthesized information on the above technologies. Literature covered in the review included DOT, FHWA, industry and military publications, ACI reports and standards, as well as research papers on work performed in university laboratories, at test tracks or at new and in-service projects.
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Introduction 9 • Chapter 1: Introduction • Chapter 2: Overview of Concrete Technologies • Chapter 3: Survey of State Practices • Chapter 4: Case Examples of State Practices • Chapter 5: Conclusions and Technology Information Gaps • References • Appendix A: Survey Questionnaire • Appendix B: Responses to Survey Questionnaire • Appendix C: State DOT Specifications/Special Provisions Goal of the Synthesis Report The report is prepared for the benefit of DOT engineers, consultants, and construction and industry professionals, as well as university students and researchers. The report provides information on a number of established and new concrete technologies to encourage more states to use these technologies and assist in removing barriers to wider implementation of the technologies.
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