EFFECTS OF OIL BEAN HUSK ASH (OBHA) ON CONCRETE PRODUCED WITH BREADFRUIT HUSK ASH (BHA)

Description

Abstract
This research work examined the influence of very fine particles of Oil bean
husk ash (OBHA) on concrete containing Breadfruit Husk Ash (BHA) as
Admixtures on the Slump, Setting time, Compressive, flexural and Splitting
tensile strengths of concrete. The fine Aggregate which falls into zone 2 of
calibration graph and crushed aggregate of 20 mm maximum size were used.
OBHA/BHA/Ordinary Portland Cement (OPC) concrete cubes (150mm x
150mm x 150mm), beams (150mm x 150mm x 700mm) and cylinder (150mm
x 300mm) with 0%, 5%, 10%, 15%, 20%, and 30% substitutions of OPC with
OBHA/BHA on equal ratio were made, cured and tested at the ages of 3, 7, 14,
21, 28 and 90 days for Compressive, flexural and Split tensile strengths
respectively. The water–cement ratio (w/c) was 0.6 and a mix ratio of 1: 2.14:
4.18 were used. The slump test results showed that slump increases with
increase in percentage addition of OBHA/BHA. The initial and final setting
times increase with increase in OBHA/BHA content. The Compressive,
Flexural, and Split Tensile Strength of concrete obtained ranges from
(3.65N/mm2 – 29.84N/mm2), (0.50N/mm2 – 3.79N/mm2) and (0.28N/mm2 –
2.06N/mm2) respectively. Compressive, Flexural and splitting tensile
strengths results and curves for OBHA/BHA/OPC concrete showed increase in
strength as the curing days of concrete increased and also decrease in strength
as the OBHA/BHA level increased. The mathematical model used for the
prediction of the Compressive, flexural and splitting tensile strength of
OBHA/BHA/OPC concrete was created by using the R-Programming
Software Application.