Geotechnical Beneficiation of the Strength Indices of Lateritic Soil Using Steel Slag and Cement

Abstract

The impact of admixture of both Ordinary Portland Cement (OPC) and steel slag was examined on the geotechnical properties of the lateritic soil, by conducting basic geotechnical tests: Particle size analysis, Consistency limits, Compaction, California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) on both the natural and stabilized soil samples and results were subjected to statistical analysis using 2-way ANOVA (Analysis of Variance) at 5% level of significance. The natural soil was classified as s A-7-6 and MH under standard soil classification systems. Addition of steel slag lowered the liquid limit (LL) and plasticity index (PI), while cement increased the LL and decreased PI of the lateritic soil, respectively. With increasing content of slag and cement, maximum dry density increased with the corresponding decrease in optimum moisture content. CBR and UCS of the stabilized soil increased substantially with increasing contents of slag and cement. Both steel slag and cement have statistically significant effects on the geotechnical properties of the lateritic soil. Hence, this soil can be stabilized with addition of 12% steel slag and 6% cement contents for its application as an improved subgrade material for light trafficked pavement. Keywords: Lateritic soil, steel slag, cement, stabilization, Index properties, strength indices.

Exploring the Influence of Plastic Powder Incorporation on Geotechnical Properties of Expansive Soil Stabilized with Granite Powder for Building Applications

“…The sample containing the highest content of plastic powder, 4%, and the highest percentage of granite powder, 8%, gave the highest percentage reduction in swelling capacity 54.24%. These results are in line with those obtained by Sudhakar [21].…”

Geotechnical Stabilization Potential of Cement Admixed with Rice Husk Ash on the Crude Oil Polluted Laterite Soil: A Case Study of Ebendo, Delta State, Nigeria

“…With increase in CBR value from 1.6% for the 10% contaminated soil sample to 4.4% and 18.3% at 10% addition of RHA and cement respectively, the implication of the result is that the addition of RHA and cement changed the lateritic soil from clay to sandy clay and well graded sand respectively. This result is also consistent with results of previous studies (Prusinski and Bhattacharja, 1999;Adedokun et al, 2022). These results clearly indicate that the addition of the RHA and cement can be used to restore and enhance the strength of the oil contaminated laterite soil.…”

Evaluation of the Statistical Significance of Compactive Efforts, Slag and Cement on the Geotechnical Features of Laterite Soil

“…According to Devi and Gnanavel [2] and Liu and Guo [3], 16-20% of production from the iron and steel industries is generated as slag from one tonne (1000 kg) of steel produced. In Nigeria, the quantity of slag generated from steel production amount to nearly 96-145 million metric tons annually, and greater portion of these productions are accumulated around the steel producing industries posing serious disposal and health challenges to the environment [4][5]. Due to rapid urbanization and increased industrial production in Nigeria, the volume of waste generated annually has increased beyond what could be handled by city authorities, and this has led to a poor waste management system resulting into serious environmental crises in many Nigerian cities [6][7][8].…”

“…Manasseh [27] and Vijayakumar et al [28] noted that carbon dioxide, which is a major greenhouse gas, contributes approximately 65% of global warming. This therefore leads to the search for alternative local materials as partial or total substitution for cement [29][30], and the search has resulted into the discovery of steel slag, an industrial waste, as a potential cementitious material [5,15,25,31].…”