Combined Method 混合方式

• Density measurement

• Longitudinal resonance test

• Surface hardness measurement*

• Prior correlation is required*

• Lower cost than coring

*Samarin A. (1991) "Combined methods" in CRC

Handbook on nondestructive testing of concrete, pp.

189-201. Edited by Malhotra V M and Carino N J.

CRC Press, Boca Raton.

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