Suitability of crushed sandcrete block (CSB) as a partial replacement for fine aggregate in concrete

  • Joshua Adoyi Akor Department of Civil Engineering, Ahmadu Bello University, Zaria, Kaduna State, Nigeria
  • Leonard Agbo Onjefu Department of Civil and Environmental Engineering, Namibia University of Science and Technology, Windhoek, Namibia; Department of Construction and Civil Engineering, Triumphant College, Windhoek, Namibia
  • Joseph Ejelikwu Edeh Department of Civil Engineering Joseph Sarwuan Tarkaa University, Makurdi, Benue State, Nigeria
  • Ademilade Joseph Olubambi Department of Civil Engineering Science, University of Johannesburg, South Africa.
DOI: https://doi.org/10.34118/jbms.v11i1.3046
Keywords: Comprehensive strength, Crushed sandcrete blocks, River sand, Specific gravity

Abstract

The suitability of crushed Sandcrete block (CSB) for use as a partial replacement for fine aggregate in concrete was examined. The physical and mechanical properties of the crushed Sandcrete block and river sand were determined and compared. The specific gravity of the crushed Sandcrete block was found to be 2.58 while that for river sand was 2.66. The concrete with compressive strength of 25N/mm2 at 28 days’ hydration period was calculated for the normal mixture as the control. The percentage mix of the fine aggregate was substituted with CSB in different mix proportions of 0:1(0%), 1:3(25%), 1:2(33.3%), 1:1(50%), 2:1(66.7%), 3:1(75%) and 1:0(100%) of crushed Sandcrete block and river sand by weight as fine aggregate. The concrete cubes were cured, and compressive strength tests were carried out at 7, 14, and 28 days. It was observed that the 28-day density and compressive strength for concrete cubes with crushed Sandcrete block alone as fine aggregate (i.e. 100%) were found to be 2420kg/m³ and 22N/mm² respectively compared to the 0:1(0%) proportion which was found to be 2485kg/m³ and 26N/mm² respectively. It was observed that the density and compressive strength reduced with the increasing addition of CSB in all the proportions.

References

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Published
2024-06-30
How to Cite
Akor, J. A., Onjefu, L. A., Edeh, J. E., & Olubambi, A. J. (2024). Suitability of crushed sandcrete block (CSB) as a partial replacement for fine aggregate in concrete. Journal of Building Materials and Structures, 11(1), 27-33. https://doi.org/10.34118/jbms.v11i1.3046
Issue
Vol 11 No 1 (2024)
Section
Original Articles

Copyright (c) 2024 Joshua Adoyi Akor, Leonard Agbo Onjefu, Joseph Ejelikwu Edeh, Ademilade Joseph Olubambi

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