5Sansalone M, Carino N J. Finite Element Studies of the Impact-Echo Response of Layered Plates Containing Flaws, in International Advances in Nondestructive Testing, 15th Ed. W. McGonnagle, Gordon & Breach Science Publishers, New York, 1990, 313-336.
6Cheng C, Sansalone M. Effects on Impact-Echo Signals Caused by Steel Reinforcing Bars and Voids Around Bars [J]. ACI Materials Journal, 1993, (5):421-434.
7Carino N J, Sansalone M. Detecting Voids in Metal Tendon Ducts Using the Impact-Echo Method [ J ]. ACI Materials Journal, 1992, 89 (3):296-303.
8Carino N J, Sansalone M. Flaw Detection in Concrete Using the Impact-Echo Method [ J ]. Proceedings, NATO Conference on Bridge Evaluation, Repair and Rehabilitation, A.S. Nowak, Ed., Kluwer Academic Publishers, Dordrecht, Netherlands, 1990 : 101-118.
9Sansalone M. Impact-Echo : The Complete Story [ J ]. ACI Structural Journal, 1997,94 (6) :777-786.
10ASTM C 1383, Test Method for Measuring the P-Wave Speed and the Thickness of Concrete Plates using the Impact-Echo Method[ J]. 2000 Annual Book of ASTM Standards, 2000. 04. 02, ASTM, West Conshohoeken, PA.
