Research Paper : Effects of Rock Flour on Some Engineering Properties of Lateritic Soil

Ogunribido T.H.T.;

For soil to be suitable for high way design and constructions, they must meet existing local requirements for index properties in addition to certain strength criteria. Samples of lateric soil from two locations along Igbatoro road in Southwestern Nigeria were differently stabilized with varying quantities of rock flour
from 2% to 10%. The objective of this study was to determine the effect of rock flour on some engineering properties of lateric soil. This investigation includes evaluation of properties such as shrinkage limits, atterberg limits, natural moisture contents,
compaction, California bearing ratio and unconfined compressive strength of the soil with rock flour contents of 2%, 4%, 6%, 8%, and 10% by weight of the dry soil. The results obtained shows that the addition of rock flour improved the engineering
properties of the soil. This investigation also confirmed that rock flour is an appropriate stabilizer with optimum amount of stabilizer needed as 4%.