Submitted on: 22 January 2007.
Revised on: 17 March 2007.
Accepted on: 05 April 2007.
___________________ACI MATERIALS JOURNAL---AMER CONCRETE INST
Submitted on: 28 April 2002.
Revised on: 09 June 2002.
Accepted on: 09 July 2002.
___________________ACI MATERIALS JOURNAL---AMER CONCRETE INST
Submitted on: 11 July 2009.
Revised on: 31 August 2009.
Accepted on: 26 October 2009.
___________________ACI MATERIALS JOURNAL---AMER CONCRETE INST
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