SAW DUST CONCRETE WITH VARIOUS PERCENTAGES OF METAKAOLIN

ABSTRACT
This study established the effects of Metakaolin on Sawdust Concrete as
an additive in concrete composites. The workability density, flexural
strength and compressive strength of the sawdust concrete and Sawdust
Concrete with various percentages (i.e 5%, 10% and 15%) of Metakaolin
were compared to that of normal mix batch conventional concrete. The
mix design was based on relevant concrete mix design codes. The
150mm x 150mm x 150mm cube specimens was used for the
compressive strength. Testing of 200mm x 100mm x 50mm rectangular
Beam specimens Test for flexural strength. The specimens were cured in
water and were tested after 7, 14 and 28 days. The tests showed that the
workability of concrete reduces after using Sawdust as full replacement of
snad and also reduces after the addition of Mekaolin in Sawdust concrete.
Tests on compressive and flexural strength showed that Sawdust Concrete
had light weight, but the addition of Mekaolin enhanced the strength of
the concrete, although concrete strength does not increase proportionally
with increasing fibre. The increased in strength was just up to a certain
Metakaolin compressive and flexural strength after 28 days of curing

Keywords: Strength, Evaluation, Saw-dust, Concrete, Metakaolin.