ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

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Page 46 of 59

ESCSI is pleased to announce that two new studies have recently been completed and the reports are now available on . Tourney Consulting Group recently completed a study to determine the effects of lightweight aggregates on transport properties and other durability related properties of concrete. Transport properties are used in several service life programs. Their study confi rmed that the time to corrosion in a reinforced concrete structure increases by approximately 25% when a lightweight concrete mixtures are used compared to a com- parable mixture with normalweight aggregates. The study also found that some lightweight concrete mixtures increased time to corrosion by a factor of two to three. Auburn University recently completed a study on the effect of using sev- eral types of lightweight aggregate concrete on the early-age cracking tendency of mass concrete. Laboratory testing simulated the edge of an 8×8 ft mass concrete column. The study found that the use of lightweight aggregates is benefi cial to control early-age cracking because it reduces autogenous shrinkage, lowers the modulus of elasticity, and lowers the coeffi cient of thermal expansion. The presence of LWA in concrete was also found to delay the time to cracking. Watch for articles on these reports in coming issues of ASPIRE SM . New research reports now available Restrained stress development for all 0.38 w/cm concretes (Auburn University) Drying specimens (Tourney) EPOXY INTEREST GROUP ¨ Follow us on Information You Can Trust. To learn more about the many benefits of epoxy-coated reinforcing steel visit . . . Epoxy-Coated Reinforcing Steel COST-EFFECTIVE CORROSION PROTECTION

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