FIELD AND LABORATORY ASSESSMENT OF THE CLEGG
HA11NIER-CBR CORRELATION
Ziauddin A. Khan, Omar S. Baghabra AI Amoudi,
Ibrahim M. Asi and
THE FOURTH SAUDI ENGINEERING CONFERENCE,
NOV. 1995 - VOLUME II
ABSTRACT.
The objective of
this paper is to evaluate the efficacy of Clegg Impact Hammer for estimating
the strength of compacted soils by conducting a comparative study between CBR
and Clegg Impact Hammer Tests. This study was carved out in two phases. In
Phase 1, compacted marl soil samples with three different compactive
efforts were tested for CBR and Clegg Impact Hammer tests. Phase 2 focused on
performing field CBR and Impact test on some preselected
locations. Results of this investigation indicate that the Clegg Impact Values
(CIV), correlate very well with CBR values for both field and laboratory tests.
The best correlation was, however obtained at the fifth blow. Moreover, the
Clegg Impact values (CIV), correlated exponentially very well with CBR values.
Therefore the Clegg Impact Hammer device can be a viable alternative and/or
supplement to the CBR test.