4.1 For a given concrete and a given test apparatus, pullout strengths can be related to compressive strength test results. Such strength relationships are affected by the configuration of the embedded insert, bearing ring dimensions, depth of embedment, and the type of aggregate (lightweight or normal weight). Before use, the relationships must be established for each test system and each new concrete mixture. Such relationships are more reliable if both pullout test specimens and compressive strength test specimens are of similar size, consolidated to similar density, and cured under similar conditions.
4.2 Pullout tests are used to determine whether the in-place strength of concrete has reached a specified level so that, for example:
In addition, post-installed pullout tests may be used to estimate the strength of concrete in existing constructions.
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