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- W193048385 abstract "This paper provides a comprehensive literature review of research performed on the bond characteristics of prestressing strand in lightweight aggregate concrete (LWC). Lightweight structural concrete has found many uses in the precast/prestressed concrete industry due to the possibility of reduced dead loads and transportation costs. Reduced dead loads can allow for longer span bridge girders for the same size section as well as helping to keep the transportation weights at manageable levels. The use of self-consolidating concrete (SCC) has also provided time, energy, and financial savings in precast/prestressed applications. Time and energy are not needed for vibration to ensure proper consolidation even in congested sections such as bridge girders. Savings are also realized in the reduction of skilled labor needed to place the concrete. It is only natural to combine the benefits of these two forms of high-performance concrete. While lightweight concrete behaves similarly to normal weight concrete, previous research has shown that its properties do differ. Numerous studies have been conducted on the bond between prestressing strand and normal weight concrete beginning with Jack R. Janney in the 1950s. Fewer research programs have focused on bond with lightweight concrete and fewer still on the bond properties of LWSCC. The effects of internal curing from water contained in lightweight aggregates and increased shrinkage and a lower modulus of elasticity, concerns for both lightweight concrete and SCC, are some of the properties that could affect bond in LWC and LWSCC. Results of previous research have shown bond behavior for lightweight concrete similar to that of normal weight concrete, however some show better bond and others poorer bond when using lightweight concrete. This paper documents the research that has been conducted in the past and highlights needs for future research." @default.
- W193048385 created "2016-06-24" @default.
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- W193048385 date "2010-01-01" @default.
- W193048385 modified "2023-09-27" @default.
- W193048385 title "Review of Strand Bond Performance in Lightweight Concrete" @default.
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