Utilization of By-product Material of The Feldspar Mineral Dressing Process as Alternative Soil-Aggregate Subbase

Abstract

This research attempted to study the feasibility of the utilization of by-product material of the feldspar mineral dressing process (BF). Which were used for alternative soil-aggregate subbase. Lateritic soil (S) was mixed with by-product material from the feldspar mineral dressing process (BF). The influences of BF content (0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100%. By weight of dry soil) Then, the characterization of each proportion was done by using several tests according to the Thailand Department of Highways standard for soil-aggregate subbase. Based on the experimental results, the characterization of each proportion was past the criteria. Except, the proportion of 100% BF. Meanwhile, CBR values were decreased when mixed with 10%-40% BF but increased when blended with 50%-90% BF. The proper proportion of 80% BF contents carried out the highest CBR (81%) was recommended to use in soil-aggregate subbase.