Authors :
Dauda Ali; Usman A. Jalam; MohammadBalteh
Volume/Issue :
Volume 7 - 2022, Issue 11 - November
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3ulmGiN
DOI :
https://doi.org/10.5281/zenodo.7392686
Abstract :
Rice husk ash is a promising pozzolanic
material for partial replacement of ordinary Portland
cement (OPC) in lightweight concrete construction. With
the spate of increasing cost of building materials on daily
basis, especially cement, resulting in very high cost of
housing, RHA has been found to be an alternative
sustainable material that will lead to decrease in cost of
mass housing delivery.The objective of the study is to
characterize the pozzolanic properties of twoidentified
RHA varieties (Jamila and Fadama II) in Gombe, the
study area, with a view to determiningthe mechanical
properties of lightweight concrete strength at different
replacement levels of ordinary Portland cement with the
identified RHA varieties. Standard cubes (100mm x
100mm x 100mm) and prisms (100mm x 100m x 500mm)
were produced in laboratory. In all204specimens of M15
grade mix were produced, cured in curing tank, and
tested by crushing. The strength of the concrete at
various replacement of cement viz: 15%, 20%, 25%, and
30% with Rice Husk Ash were compared with controlled
mix of same grade M15. The compressive and the
flexural strength at 7, 14, 21 and 28 days were
determined,and the results at respective days of curing
was encouraging. The optimum replacement of rice husk
ash with OPC was found to be 20% for Jamila and 30%
for Fadama II. The resultscan be used for lightweight
construction in low cost housing in the study area.
Keywords :
Rice husk ash, Optimum replacement level, Low cost Housing
Rice husk ash is a promising pozzolanic
material for partial replacement of ordinary Portland
cement (OPC) in lightweight concrete construction. With
the spate of increasing cost of building materials on daily
basis, especially cement, resulting in very high cost of
housing, RHA has been found to be an alternative
sustainable material that will lead to decrease in cost of
mass housing delivery.The objective of the study is to
characterize the pozzolanic properties of twoidentified
RHA varieties (Jamila and Fadama II) in Gombe, the
study area, with a view to determiningthe mechanical
properties of lightweight concrete strength at different
replacement levels of ordinary Portland cement with the
identified RHA varieties. Standard cubes (100mm x
100mm x 100mm) and prisms (100mm x 100m x 500mm)
were produced in laboratory. In all204specimens of M15
grade mix were produced, cured in curing tank, and
tested by crushing. The strength of the concrete at
various replacement of cement viz: 15%, 20%, 25%, and
30% with Rice Husk Ash were compared with controlled
mix of same grade M15. The compressive and the
flexural strength at 7, 14, 21 and 28 days were
determined,and the results at respective days of curing
was encouraging. The optimum replacement of rice husk
ash with OPC was found to be 20% for Jamila and 30%
for Fadama II. The resultscan be used for lightweight
construction in low cost housing in the study area.
Keywords :
Rice husk ash, Optimum replacement level, Low cost Housing
