Use this in conjunction with the
V-C-9900 V-Meter MK III
for rapid and accurate estimation of concrete strength.
The equipment should be verified for proper operation with
Anvil for calibrating James Test Hammers
anvil at regular intervals.
All Test Hammers shown here have an Impact Energy level of
1.6 ft. lbs. (0.225 kgm) and come complete with carrying case and
Easy to use
manual calculation of the mean rebound number.
Test Hammers conform to:
The W-M-250 Manual Test Hammer
is the traditional instrument used for the non-destructive testing of
hardened concrete. This easy-to-use instrument provides a quick and
simple test for obtaining an immediate indication of concrete strength
in various parts of a structure. The minimum verifiable strength is
1400 PSI (10 MPa) to approximately 9000 PSI (62 MPa). All concrete test
hammers measure the surface hardness of the material they are testing;
this is then correlated to concrete compressive strength.
concrete test hammer, aka rebound hammer, schmidt hammer, swiss hammer,
sclerometer, is the most widely used non destructive instrument for
compressive strength determination. However, it typically has the
largest coefficient of variation; therefore its result should be
verified with another non destructive test such as the V-Meter MK III.
Correlation Charts for James Instruments Rebound Hammer