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Creep-low-modulus-study - MODULUSOFELASTICITY,CREEPAND...

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1 MODULUS OF ELASTICITY, CREEP AND SHRINKAGE OF CONCRETE – PHASE II U.F. Project No. 00059678 Contract No: BD545 67 FDOT Project Manager: Michael Bergin August 2009 Department of Civil & Coastal Engineering College of Engineering University of Florida Gainesville, Florida 32611 6580 Acknowledgments Invaluable Support from the following FDOT personnel: Charles Ishee Richard DeLorenzo Craig Roberts Joseph Fitzgerald Christopher Ferraro Toby Dillow Luke Goolsby & Others
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2 Acknowledgments Florida Rock Industries Company for donating the ground blast furnace slag Boral Materials Company for donating the fly ash W. R. Grace and Company for donating the chemical admixtures Carolina Stalite Company for donating the lightweight aggregate MODULUS OF ELASTICITY, CREEP AND SHRINKAGE OF CONCRETE – PHASE II, PART 1 – CREEP STUDY Mang Tia Yanjun Liu Boris Haranki Yu Min Su
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3 Background and Research Needs for Creep Study (1/2) • The values of the modulus of elasticity, ultimate shrinkage strain, and ultimate creep coefficient of concrete, which are used in structural design in Florida, are either based on the arbitrary available literature or on the limited research of the locally available material. Background and Research Needs for Creep Study (2/2) • There is a great need for comprehensive testing and evaluation of locally available concrete mixes to determine these physical properties of Florida normal weight, as well as lightweight concretes, especially for the concretes used in pre stressed concrete structures, so that correct values for these properties can be used in structural design.
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