Mgangira, Martin B2009-10-122009-10-122009-07Mgangira, M.B. 2009. Evaluation of the effects of enzyme-based liquid chemical stabilizers on subgrade soils. Sustainable Transport: 28th Annual Southern African Transport Conference (SATC) 2009, Pretoria, South Africa, 6-9 July 2009, pp 192-1999781920017392http://hdl.handle.net/10204/3654Sustainable Transport: 28th Annual Southern African Transport Conference (SATC) 2009, Pretoria, South Africa, 6-9 July 2009, pp 192-199The purpose of this study was to asses the strength of enzyme treated soil material. Thus the aim of the paper is to present laboratory results on the effects of two enzyme-based liquid chemicals as soil stabilizers. Soil samples were prepared for standard geotechnical tests from two types of soils treated with the two enzyme-based products. One soil had a plasticity index of 35% and the other had a plasticity index of 7%. The maximum plasticity index reduction after treatment of both soils was less than 5 % and therefore not significant. A slight improvement in the maximum dry density was obtained following treatment by one product on one of the soil samples, but this is within experimental variability. Unconfined compressive strength was evaluated after the samples were left to cure in plastic bags for 7, 14, 28 and up to 56 days for one sample and revealed a mixed effect on strength. In those instances where there was an increase in strength it was less than 50 % with an increase in concentration level of the two enzyme-based stabilizers and age for both soils after treatment, which is practically not significant.enEnzyme chemical stabilizerSubgrade soilsEnzyme treated soil materialsSoil stabilizerSpecimen preparationAtterbergUnconfined compressive strengthUCS28th Annual Southern African Transport ConferenceSATCSustainable transportConference PresentationMgangira, M. B. (2009). Evaluation of the effects of enzyme-based liquid chemical stabilizers on subgrade soils. http://hdl.handle.net/10204/3654Mgangira, Martin B. "Evaluation of the effects of enzyme-based liquid chemical stabilizers on subgrade soils." (2009): http://hdl.handle.net/10204/3654Mgangira MB, Evaluation of the effects of enzyme-based liquid chemical stabilizers on subgrade soils; 2009. http://hdl.handle.net/10204/3654 .TY - Conference Presentation AU - Mgangira, Martin B AB - The purpose of this study was to asses the strength of enzyme treated soil material. Thus the aim of the paper is to present laboratory results on the effects of two enzyme-based liquid chemicals as soil stabilizers. Soil samples were prepared for standard geotechnical tests from two types of soils treated with the two enzyme-based products. One soil had a plasticity index of 35% and the other had a plasticity index of 7%. The maximum plasticity index reduction after treatment of both soils was less than 5 % and therefore not significant. A slight improvement in the maximum dry density was obtained following treatment by one product on one of the soil samples, but this is within experimental variability. Unconfined compressive strength was evaluated after the samples were left to cure in plastic bags for 7, 14, 28 and up to 56 days for one sample and revealed a mixed effect on strength. In those instances where there was an increase in strength it was less than 50 % with an increase in concentration level of the two enzyme-based stabilizers and age for both soils after treatment, which is practically not significant. DA - 2009-07 DB - ResearchSpace DP - CSIR KW - Enzyme chemical stabilizer KW - Subgrade soils KW - Enzyme treated soil materials KW - Soil stabilizer KW - Specimen preparation KW - Atterberg KW - Unconfined compressive strength KW - UCS KW - 28th Annual Southern African Transport Conference KW - SATC KW - Sustainable transport LK - https://researchspace.csir.co.za PY - 2009 SM - 9781920017392 T1 - Evaluation of the effects of enzyme-based liquid chemical stabilizers on subgrade soils TI - Evaluation of the effects of enzyme-based liquid chemical stabilizers on subgrade soils UR - http://hdl.handle.net/10204/3654 ER -