Journal of Civil Engineering Beyond Limits (CEBEL)

Damilola Ayodele Ogundare Ayokunle Oluwaseun Familusi Ayodeji Theophilus Akinbuluma

It is imperative for geotechnical engineers to harness ways of improving lateritic soil with industrial waste materials in other to satisfy the required highway pavement construction. This work investigated the effect of Electric Arc Furnace Slag (EAFS) on the engineering properties of Lateritic soil. Tests to determine the X-Ray Florescence (XRF), X-Ray Diffraction (XRD), grain size analysis and specific gravity of the soil sample and EAFS and the lateritic soil stabilization with varying percentages (0%, 4%, 8%, 12% and 16%) of EAFS using Atterberg limits, Compaction and Shear Strength were carried out. The soil sample was classified as A-7-5 (6) and ML according to American Association of State Highway Transportation Official (AASHTO) and Unified soil classification system while the silica-sesquioxide ratio and mineral contents showed that the soil is a lateritic soil as they contain both swelling and non-swelling clay minerals. The stabilized soil sample revealed that EAFS increases the maximum dry density (20.0 KN/m3 to 25.0 KN/m3) and decreases the optimum moisture content (18.50% to 13.00%) which could be attributed to the lower affinity of EAFS to water thus, improving the compaction properties. Also, the EAFS has significant effect on the strength parameters of the lateritic soil as it increases the shear strength from 551.11KN/m2 at virgin state to 974.44KN/m2 at 16% EAFS. Conclusively, electric arc furnace slag has positive influence on the geotechnical properties of the lateritic soil as it will not only solve the waste disposal problem but can be used as additive to improve the engineering properties of lateritic soil.

https://doi.org/10.36937/cebel.2023.1811

Abdelrahman Abuserriya Bashir Osman

Soil parameters such as physical, chemical, and strength parameters play an important issues to classify the soil. Cohesion and friction angle are an important factors to understand the nature of the soil. Furthermore, standard Penetration Test (SPT) is one of the most common tests in the field and used to determine the strength of soil in the field prior laboratory tests. The variation in the properties of the soil in different regions, give differ values when using the standard methods, formulas, and correlations. In this paper, an overview of the methods and guidelines currently available in the scientific literature for evaluating the strength capacity of the soil, is reported. Further, important practical issues which contribute in the soil strength in different regions based on cohesion and friction angle used SPT are discussed. Moreover, the correlation results from the standard penetration test compared with those from cohesion and friction angle based on samples number and regions. Finally, the paper mentions the famous correlation in this domain and others from the standard code at USA, Jordan, Japan and UK. The compared results using guides from these standards showed big different, which let us to recommend that, these standards are not suitable for soil strength calculations due to different in the soil parameters from region to other.

https://doi.org/10.36937/cebel.2023.1821

Andi Yusra Zakia Fachruddin M. Rendi Saputra Arianda

High quality concrete has a low enough porosity value to achieve high density. The purpose of this study was to measure the performance of high-quality concrete blocks by using bamboo reinforcement and bamboo fiber as additional materials. The use of super-liquefying additives from fly ash and palm kernel shells, and high-quality low-grade FAS Tilapia Concrete enhances the concrete experience. Based on (ACI, 2014), it is classified as high-quality concrete with a compressive strength greater than 41.4MPa. Reinforced concrete is a structure made by mixing coarse aggregate, fine aggregate, water, cement, and steel aggregate. Fiber concrete is concrete in which fibers evenly mixed with concrete mortar. The fibers in this concrete serve to retard cracking and reduce brittleness, making the concrete thinner than regular concrete. Using fibers up to 1.5 µm in high-quality reinforced concrete blocks, the maximum deflection reached 23,200 mm for LVDT 5, 0.000 mm for LVDT 3 and LVDT 4, and 37.565 mm. As a result, no shear cracks occurred, and only flex cracks occurred. This is because bending stiffeners are weaker than sliding bones. To increase the flexural strength of bamboo reinforcing blocks, the amount of tensile and compressive bamboo reinforcement should increase to double the amount of reinforcement used in this study.

https://doi.org/10.36937/cebel.2023.1866