Abstract
Mining of river and quarry sands is expensive, with negative effects on the environment. Laterite soil is a cheap and readily available material in sub-Saharan Africa. Laterite concrete, produced when sand is partially replaced with laterite and impregnated into the concrete is widely used in Nigeria. This paper presents a computational assessment of the deflection and shear strength responses of laterite concrete under flexural deformation. Results of laboratory tests were used to formulate the shear deformation models from which shear and deformation values were computed for laterite beams of grade M20 and M25, and with partial replacements of 5–25% of fine aggregate. The results show that the inclusion of laterite increased the shear resistance of concrete to maximum values of 18.49 and 13.14 N/mm2 at optimum of 15% replacement for the two grades, compared with 2.25 and 5.17 N/mm2 values from 0% laterite level. The displacement model in a 1-D time–space derived from the Euler–Bernoulli beam theory shows a distinct line of symmetry at the mid-point of the beam in the time 1-D time continuum, with deflection and shear resistance shown as an area of varying intensities.
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The authors did not receive support from any organization for the submitted work. No funding was received to assist with the preparation of this manuscript. No funding was received for conducting this study. No funds, grants, or other support was received.
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Both authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by EEN and SO. The first draft of the manuscript was written by SO and edited by EEN. Both authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Ndububa, E.E., Ogbo, O.S. A computational assessment of the deflection and shear improvement of concrete beam impregnated with laterite. Asian J Civ Eng 23, 173–186 (2022). https://doi.org/10.1007/s42107-021-00413-9
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DOI: https://doi.org/10.1007/s42107-021-00413-9