In order to achieve this goal, destructive (DT; e.g., cores) and non-destructive (NDT; e.g., ultrasonic, rebound) test methods are often adopted, either alone or combined.
The impact resistance of concrete containing 40% fine bone china ceramic aggregate was measured by a drop weight test and rebound test.
I had been checking on my son, doing the rebound test, making him jump to see if he could without pain and for the first day, he passed all my "appendicitis tests" with flying colors.
Measured surface hardness from rebound hammer tests in situ appears to be correlated to the results of laboratory breakage tests on core samples.
A previous study concluded that a surface hardness based nondestructive test (NDT) method (rebound hammer test) is not reliable and that ultrasonic pulse velocity (UPV), which is a stress wave propagation based method, can be a useful tool for strength estimation of CMU (Sajid et al., 2016).
A method to estimate the CoV of the concrete strength using the CoV of rebound hammer test results is also proposed to overcome the need for a high number of destructive tests.
Schwartz rebounded, and tests later showed that the transplant had worked and that her body was generating new immune cells.
Based on the surface hardness of concrete, a rebound hammer test has been used to evaluate the compressive strength at the ambient temperature and after fire.
DOI: http://dx.doi.org/10.7554/eLife.09115.003 > -wrap-foot> Total HIV-1 DNA represents the most commonly used virological marker for the assessment of the size of the proviral HIV-1 reservoir and is predictive of viral rebound when tested at the time of treatment interruption in early-treated patients (Williams et al., 2014).
To remedy this, this paper proposes some possible improvements to the current standards paying special attention to the identification of the concrete areas with homogeneous properties within the structure using non-destructive tests (rebound index and direct ultrasonic velocity tests).
