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Soil Stabilization Using Bitumen Emulsion and Cement Combination as Additive



Author(s)

AYININUOLA Gbenga Matthew and ABIDOYE Shola Paul

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DOI:10.17265/2159-581X/2018.02.002

This study examined effect of stabilising lateritic soil with combination of bitumen emulsion and cement. Soil samples were obtained from borrow pits located in Kwali Area Council in Abuja. Three percentages of additives were considered: 4%, 6% and 8%. The bitumen emulsion and cement contents were combined in percentages: 100:0, 75:25, 50:50, 25:75 and 0:100 to form five additives. The stabilized soils and unstabilized soils (control) geotechnical properties such as Unconfined Compressive Strength (UCS) test and California Bearing Ration (CBR) test were determined. The UCS and CBR for soil samples A and B were 0.46 MPa and 19.6%, 0.95 MPa and 22.6%, respectively. The CBR of soil A at 4% additives of mix proportions 100%/0%, 75%/25%, 50%/50%, 25%/75% and 0%/100% were 49.1%, 68.8%, 140.5%, 172.1% and 218.5%, respectively. The corresponding values for UCS were 0.64, 0.66, 1.21, 1.27 and 1.33. While for 8% additives the CBR for soil B were 78.4%, 88.4%, 180.5%, 224.2%, 288.1% and UCS were 0.48, 0.68, 1.50, 2.16 and 2.45, respectively. It was observed that both the UCS and CBR values increased as the cement component increased for both soil samples. Stabilising laterite with mixture of bitumen emulsion and cement improved the strength of the soil.

Stabilization, unconfined compressive strength test, California bearing ratio, moisture contents, bitumen emulsion.