Nweke O.M.1,*, Okogbue C.O.2, Ani C.C.1, Alieze I.V.1, Obasi PN3, Omeokachie A.I.1 and Ukpai S.N.1
1 Department of Geology and Exploration Geophysics, Ebonyi State University, Abakaliki, Nigeria
2 Department of Geology, University of Nigeria, Nsukka, Nigeria
3 Department of Geological Sciences, Nnamdi Azikwe University, Awka, Nigeria
*Corresponding Author: firstname.lastname@example.org
Vol. 6 No. 2 | October 2022 | Pages 448 – 460 | Cite this article
This paper presents the study of crushed sandstones wastes (CSW) aiming at their utilization as main materials for the base layer of flexible pavements with series of geotechnical laboratory tests contained in American Society for Testing and Materials adopted for their evaluations. The tests conducted included particle size distribution, Atterberg limits, compaction characteristics, California bearing ratio, unconsolidated undrained compressive strength, free swell index and one-dimensional consolidation tests. Statistical analyses using proprietary computer software were used to investigate the spatial variations of the geotechnical data, and degrees of relationships that exist among the tested parameters. From the results, the Atterberg limits tests revealed intermediate plasticity with less than 35% fines (percentage passing No. 200 British Standard sieve) in majority of the samples; an indication of good highway materials. The relatively high maximum dry density, low optimum moisture content and high shear strength recorded by the tested CSW materials proved their usability in most road projects such as sub-base and subgrade. The strength indicators adopted to evaluate the validity of the CSW as pavement materials showed relatively high shear strength as the undrained cohesion values satisfy the requirement of greater than 103 kN/m2 values specified for base course materials. The empirical correlations analyses verified the influence of moisture on the strength parameters and gave a general overview of the geotechnical behaviors of the examined quarry wastes. Therefore, CSW materials are adjudge suitable but in order to achieve long term strength gain and stability especially in high volume applications, stabilizations will be required.
Keywords: Amasiri, Highway, Quarry waste, Subgrade, Moisture
This work is licensed under a Creative Commons Attribution 4.0 International License.
Cite this article as:
Nweke O.M., Okogbue C.O., Ani C.C., Alieze I.V., Obasi P.N., Omeokachie A.I. and Ukpai S.N. 2022. Geotechnical Evaluation of Crushed Sandstone Waste Materials from Amasiri Quarries, Southeastern Nigeria for Use in Civil Engineering Projects. Nigerian Journal of Environmental Sciences and Technology, 6(2), pp. 448-460. https://doi.org/10.36263/nijest.2022.02.0385