Present state of and Perspectives on Testing Methods for Air Permeability of Concrete Surface Layer
By K. Imamoto
Concrete Journal, Vol.53, No.7, Jul. 2015
- Synopsis
- This paper describes the present state of and perspectives on research on air permeability testing methods for the evaluation of the durability of reinforced concrete structures by non-destructive and semi-destructive means, including an overview of RILEM TC 189-NEC (Non-Destructive Evaluation of the Concrete Cover) , State-of-the-Art Report, studies conducted in Japan, and RILEM 230-PSC (Performance-based specifications and control of concrete durability). The Swiss standard clearly states the importance of cover concrete for the durability of structures, and introduces the surface layer air permeability testing method as an evaluation method. Proper evaluation of the density of cover concrete along with the cover thickness are important for taking the evaluation of the durability of structures to a higher level. Further clarification of the scope of application of air permeability testing and the reflection thereof to standards and academic society guidelines are considered to be necessary in the future.
- Keywords:
- cover concrete, air permeability, carbonation, mass transfer resistance, non-destructive, semi-destructive
