ABSTRACT

In situ testing of concrete to assess its strength and durability is now common. Whereas there is a general acceptance of in situ tests for assessing the strength of concrete, the same is not true for permeability testing due to the effect of in situ moisture condition on the measured permeation properties. This chapter describes one of the methods that has been used successfully to assess near-surface strength of concrete — the pull-off test. This is followed by a review of some of the in situ tests that can be used to measure the water absorption, water permeability, and gas permeability of concrete.