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Ramonu John, A.L., Ilevbaoje Joseph, O., Olaonipekun, O.A., Opeyemi, O., Sina- Olulana, O., Dotun, O., Samson Adekunle, S., et al. (2019) Compressive Strength Analysis of Conventional Design Concrete Mix Ratio; 1:2:4 and Non-Conventional Concrete Mix Ratio; 1:3:3 for the Construction Industry in Nigeria. International Journal of Civil Engineering and Technology, 10, 1133-1141.

has been cited by the following article:

• TITLE: Equal Volumes of Sand and Gravel Concrete Mix Ratios in Cameroon and Its Effect on Concrete Compressive Strength

  AUTHORS: Patrick Bame Che, Yamb Bell Emmanuel, Ndigui Billong

  KEYWORDS: Conventional Concrete, Rationalized Concrete, Mix Ratio, Compressive Strength, Equal Volumes of Sand and Gravel

  JOURNAL NAME: World Journal of Engineering and Technology, Vol.10 No.3, July 29, 2022

  ABSTRACT: In recent years, the rationalization of concrete mix ratios which batches equal volumes of sand and gravel in building projects has been gaining grounds in the Cameroon construction industry. The main objective of this study is therefore to investigate if the concrete produced with rationalized mix ratio can be adopted as conventional mix ratio in terms ofminimum required compression strength of concrete for buildings. Specifically this work compared the conventional mix ratio of 350 kg of cement: 400 liters of sand: 800 liters of gravel for a cubic meter and the rationalized batch of 350 kg of cement: 600 liters of sand: 600 liters of 5/15 gravel, 15/25 gravel and a combination of 5/15 + 15/25 gravel. Average compressive tests’results for both the conventional and the rationalized mix ratios were found to meet the minimum compressive strength of 65% at 7 days, 90% at 14 days and 99% at 28 days for gravel size combination 5/15 + 15/25. Single size gravel of 5/15 and 15/25 did not meet the minimum required compressive strength of 20 N/mm2 for the rationalized mix ratio at 28 days curing based on the minimum compressive strength required, this study arrives at the conclusion that the equal volumes of sand and gravel mix ratio of 350 kg/m3 of cement: 600 liters of sand: 600 liters of gravel mix ratio can be adopted as a conventional concrete mix ratio for gravel size 5/15 + 15/25.