The Use of Palm Kernel Hush Ash in Concrete Production

Abstract

In this research work, the use of palm kernel husk ash was studied. A mix-proportion of 1:1.84:3.74 with water-cement
ratio of 0.47 was used. The percentages of palm kernel husk ash (PHA) in cement are 0%, 5%, 10%, 20%, 30% and
40%. Concrete cubes of 150mmx150mmx150mm of OPC/PHA were cast and cured for 7, 28, 60 and 90 days
respectively. At the end of each hydration period, three concrete cubes for each hydration period were crushed and
their average compressive strength recorded. A total of seventy two (72) concrete cubes were cast. The results of the
compressive strength tests for 5-40% PHA/cement mixtures range from 11.99-34.70N/mm2 as against 23.93 –
38.15N/mm2 for the control test. The setting times of 5-40% of PHA in cement range from 59-112mins and 628-
837mm for the initial and final setting time respectively. The initial and final setting times of the control tests (0%
replacement) are 55mins and 600mins respectively. The result of the slump test of control test is 5mm while the results
for 5-40% of PHA in cement range from 12-57mm.