Soil Stabilization Using Terrasil And Zycobond on Ijikoyejo Street Surulere Lagos State Nigeria

Abstract

Deep excavation of unsuitable soil in road construction have resulted in escalation of the cost of soil exchange and total project sum of construction, one of the possible ways of cost reduction is to stabilized the existing subgrade material (sandy silty-clay) by using the mixture of terrasil, zycond and water. Consequently, the objective of this paper is to investigate the application of soil stabilization with Terrasil and Zycobond on Ijikoyejo Street Surulere Lagos State Nigeria using approproitae standard procedures including collecting Three samples marked Ch.0+100, Ch.0+300 and Ch.0+550. Data obtained in the Engineering test show that the mixture of Terrasil/Zycobond /Water is able to increase the CBR values. In sample A, 11.5 to 64.4% with ratio 1:2:50, 11.5 to 49.3% with ratio 1:2:100, 11.5 to 33.9% with ratio 1:2:150, from 11.5 to 22.8% with ratio 1:2:200. In sample B, 13.8 to 67.6% with ratio 1:2:50, 13.8 to 48.4% with ratio 1:2:100, 13.8 to 31.3% with ratio 1:2:150, 13.8 to 22.3% with ratio 1:2:200. Ins sample C, 11.8 to 68.4% with ratio 1:2:50, 11.8 to 45.5% with ratio 1:2:100, 11.8 to 31.3% with ratio 1:2:150, 11.8 to 23.7% with ratio 1:2:200. The compaction results also show that the optimum moisture content (OMC) reduced after the mixture of the additive and in most cases the maximum dry density (MDD) increases. The results of the analysis show that the soil samples with additive improved the Engineering properties of the soil compared to the soil without additive, the higher the concentration of the additive the better the results obtained. Investigation reveals that the mixture of the proportions to sandy silty-clay showed significant improvement on the compaction and CBR values of soil. Therefore, these researches provide a sound platform for the use of terrasil and zycobond as auxiliary additives and reveal their full potentials in soil stabilization.