Air permeability as characteristic parameter for the quality of cover concrete of concrete structures (AGB2002/003)
Overview
Background & policy context:
Many defects and non-conformities can be related to the planning and manufacturing process.
A quality control on separately manufactured specimens or on structural members of a structure allows the early detection of non-conformities. Additionally, quality control leads to increased quality awareness. Nowadays destructive tests on the structure, if any, are mainly carried out: The compressive strength and/or tightness of concrete are determined on cores taken from the structural member. Non-destructive tests exist since quite a long time, but are rarely used.
Objectives:
In the framework of this project it was aimed at to clarify the practical applicability of the non-destructive air permeability measurement, which is carried out according to standard
SIA 262/1, annex E.
Further investigation on the applicability of the air permeability measurements for the assessment of the quality of the cover concrete will be carried out.
Methodology:
Application of air permeability measurement on new and old concrete structures; execution of laboratory tests to assess the air permeability measurement; evaluation of methods for the determination of the moisture in concrete; elaboration of a recommendation for the application of field tests.
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