Device and procedure for measuring in situ strength of concrete and the like

摘要: A device and procedure for measuring the strength of brittle material such as concrete in which a measurable torque is applied to body member embedded material. The has reacting surface contacts portion be tested exerts compressive force thereon response application member. thin layer compressible provided on adjacent ensure unimpeded localized rupture during test. Torque through an elongated rod one end secured opposite extending outwardly from In preferred embodiment, first turned direction break bond between apply