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1
Exploiting the Potentials of Rice Husk Ash as Supplement in Cement for Construction in Nigeria

Akindehinde Ayotunde Akindahun,Oluwotosin Alade 한국콘크리트학회 2010 International Journal of Concrete Structures and M Vol.4 No.1
- 원문보기
This paper present the results of investigation on the use of rice husk ash as a partial substitute for cement in construction. One hundred and eighty specimens of concrete cubes were cast. 0, 5, 10, 15, and 20% partial replacement of cement with rice husk ash were carried at 1:2:4 mixes by weight with 0.60, 0.65, 0.70 water/cement ratio. The results indicated that compressive strengths of cubes at 0.6, water/cement were higher than 0.65 and 0.70. Also 5% partial replacement cement with rice husk ash at 28<SUP>th</SUP> day average compressive strength value of 25.4 N/mm² compared well with 0% partial replacement of cement with rice husk ash of 26.28 N/mm². This shows that at 5% partial replacement of cement with rice husk ash can be used for structural concrete and at 15% replacement or more it can be used for non - structural construction works or light weight concrete construction. The cost analysis shows substantial amount of savings for the country.
2
Exploiting the Potentials of Rice Husk Ash as Supplement in Cement for Construction in Nigeria

Akindahunsi, Akindehinde Ayotunde,Alade, Oluwotosin Korea Concrete Institute 2010 International Journal of Concrete Structures and M Vol.4 No.1
- 원문보기
This paper present the results of investigation on the use of rice husk ash as a partial substitute for cement in construction. One hundred and eighty specimens of concrete cubes were cast. 0, 5, 10, 15, and 20% partial replacement of cement with rice husk ash were carried at 1:2:4 mixes by weight with 0.60, 0.65, 0.70 water/cement ratio. The results indicated that compressive strengths of cubes at 0.6, water/cement were higher than 0.65 and 0.70. Also 5% partial replacement cement with rice husk ash at $28^{th}$ day average compressive strength value of $25.4\;N/mm^2$ compared well with 0% partial replacement of cement with rice husk ash of $26.28\;N/mm^2$. This shows that at 5% partial replacement of cement with rice husk ash can be used for structural concrete and at 15% replacement or more it can be used for non - structural construction works or light weight concrete construction. The cost analysis shows substantial amount of savings for the country.