METHOD AND APPARATUS FOR EARLY STRENGTH TESTING OF IN-PLACE CONCRETE

摘要

Reduced scatter in strength determinations of hardening inhomogenous materials such as concrete is achieved by in-place screen-rejection of coarse-particle ingredients from test bodies evaluated by variations of the tensile-shear or pull-out method. Non- or semi-destructive tests on specimens or structures at any age are described in connection with construction safety, structural load-bearing capacity, evaluation of materials and systems. Use of flexible filler in the pull-out ring extends the applicability of the test system into the interior of mass structures. Portable apparatus requires no utility services.