ALKALINE ACTIVATED METAKAOLIN AND ALKALINE ACTIVATED SUGARCANE BAGASSEAS PARTIAL REPLACEMENT FOR CEMENT IN CONCRETE

ABSTRACT
This study is aimed at investigating the compressive strength of concrete
using metakaolin and sugarcane bagasse as a replacement for cement in
concrete using three grades of concrete; grade 20, 25 and 30 respectively,
the concrete cube cast was; control (0%) 5%, 10%, 15% and 20%
respectively. the cube was cast, cured and tested at 7days and 28days. The
compressive strength grade 20, 25 and 30 for 0%, 5%, 10%, 15%, and
20% were obtained as follows: Concrete grade 20 7 days =13.6 N/mm2,
14.3 N/mm2, 18.4 N/mm2, 20.2 N/mm2, and 18.8 N/mm2, 28 days =21.4
N/mm2, 21.8 N/mm2, 23.6 N/mm2, 24.7 N/mm2, and 22.9 N/mm2.
Concrete grade 25 7 days =17.4 N/mm2, 21.9 N/mm2, 22.4 N/mm2, 24.8
N/mm2, and 23.6 N/mm2, 28 days = 26.3 N/mm2, 26.7 N/mm2, 27.4
N/mm2, 28.0 N/mm2, and 25.3 N/mm2. Concrete grade 30 7 days = 21.3
N/mm2, 23.5 N/mm2, 24.3 N/mm2, 25.9 N/mm2, and 25.0 N/mm2, 28
days = 31.2 N/mm2, 31.8 N/mm2, 32.3 N/mm2, 36.4 N/mm2, and 31.7
N/mm2. The results of this study have shown a significant increase in
compressive strength of concrete utilizing metakaolin and sugarcane
bagasse than normal concrete, it could be recommended that metakaolin
incorporated with sugarcane bagasse (activated) of 5%, 10% & 15%
replacement can be used for the different grades of concrete, while 20%
replacement of metakaolin can be used in road kerbs, concrete blocks,
non-bearing concrete walls, Light Weight Concrete, precast units
(partition walls, concrete blocks for Architectural applications and some
cases of slabs on soil, culverts, sidewalks, drive ways), foundation pads for
machinery, etc.

Keywords: Cementious Material, Compressive Strength, Metakaolin,
Sugarcane Bagasse Pozzolana, filler