Abstract:
The demand of natural coarse aggregates in the construction industry has been increased
while at the same time the generated wastes from different areas are increasing
substantially. Various researches aiming to produce concrete from manufactured or
aggregates from industrial or agricultural by-products, is gradually becoming very
popular. This is due to the fact that industrial and agricultural wastes are being re-used
thereby ensuring the environmental degradation arising from the production of these
waste products is curtailed to the barest minimum. It is very essential to protect the
natural coarse aggregates for further generation. To fulfill the demand of such naturally
occurring materials, various substitutes are used.
In the present study, an attempt has made on the suitability of the machine crushed
animal bones as partial or full replacement for crushed coarse aggregates in concrete
works. The study has been carried out at 10%, 25%, 50%, 75%, and 100% replacement
levels of crushed coarse aggregate(CCA) by crushed animal bone (CAB) aggregate by
weight and a comparative study has been done between normal concrete and crushed
animal bone (CAB) concrete.
To achieve the objectives of this study aggregate test were carried out in accordance with
the appropriate ASTM standards. Physical and mechanical properties of machine
crushed animal bones and locally available crushed coarse aggregate have been
determined and compared. An auxiliary test like compression was also made on cubes for
C-25 grade concrete and curing for 7days and 28 days.
The result showed that both the crushed coarse aggregate and crushed animal bone
aggregate were within the acceptable limit of ASTM C-33 and ASTM C-330 standards.
And the Compressive strength tests showed that approximately 10% of the crushed
animal bones in replacement for crushed coarse aggregate were quite satisfactory with
no compromise in compressive strength.
