Surface tests to determine transport properties of concrete – III: measuring gas permeability
Abstract:
It was noted in Chapter 4 that it was not possible to determine the permeability from the gas tests because the distance over which the pressure drop occurs is not known. The development of a new non-destructive test capable of measuring the air permeability of in situ concrete is described. The new method measures the movement of gas between different holes drilled into the concrete and gives results for the permeability of the concrete and the distance over which the pressure drop occurs and, from this, the effective volume of concrete that is being tested.
Key words
permeability; Figg test; coefficient of permeability; test volume
5.1 Introduction ...
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