Strength Properties of Rice Husk Ash Concrete with Shredded Pet Bottles as
Coarse Aggregate Replacement
1Akinleye, M. T., 2Uthman, Q. A. and 3Abdulwahab, A. A.
1Department of Civil Engineering, Adeleke University, Ede, Nigeria.
2Department of Civil Engineering, University of Ibadan, Ibadan, Nigeria
3Department of Civil Engineering, Kwara State University, Malete, Nigeria.
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DOI: 10.36108/laujoces/9102/20(0260)

This study investigated the strength properties of Rice Husk Ash (RHA) concrete with shredded Polyethylene Terephthalate (PET) bottles as coarse aggregate partial replacement. Concrete mix, 1:2:4 was designed for all specimens with w/c of 0.5. Samples were prepared and examined at deferent replacement levels of cement with RHA (5, 10 and 15%) using shredded PET bottles (5, 10 and 15%) as coarse aggregate replacement. Concrete without RHA and shredded PET bottles served as control. A total number of 90 concrete cubes and 20 flexural beams were used to examine the strength properties of produced concrete specimens at 28 days. Results revealed that both compressive and flexural strengths of RHA-concrete decreased as the amount of shredded PET bottles increased. The compressive strengths obtained were 20.65, 17.44, 16.53 and 15.87 N/mm2 while the flexural strengths were 10.49, 6.63, 6.59 and 5.72 N/mm2 for 0, 5, 10 and 15% replacement levels respectively. This class of concrete could be used to produce both plain and reinforced concrete of light weight aggregate.

Keywords: Concrete, Rice Husk Ash, Coarse aggregate, PET aggregate, Compressive and Flexural strength.

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