Paper Title
Study Of The Properties Of Concrete Containing Ashes Of Rise Husk Ash (RHA) And Palm Oil Husk Ash (POHA) As Partial Replacement Of Cement

Abstract
In this research two different ashes were used separately as partial replacement in concrete, these are rice husk ash (RHA) and palm oil husk ash (POHA). These waste materials were obtained on burning of husk of each of the two materials, chemical composition, sieve analysis, consistency, setting and specific gravity tests were carried out on the paste with and without ashes and workability on fresh concrete containing the two ashes to ascertain the compressive strength properties of concrete containing ashes as partial replacement for cement. Concrete mixes were prepared i.e. 100% OPC as control, three mixes each of RHA and POHA at cement replacement of 15%, 20% and 25%. Compressive strength test was carried out on concrete for 7, 21 and 28 days. It has been found that palm oil husk ash has compressive strength close to control in concrete at 28days. The results obtained and the observation made clearly demonstrate that the partial replacement of cement by POHA is advantageous, particularly for concrete at 20% without any chemical additive.