1. The dry unit weight and optimum moisture of
bentonite- lime mix increased with the addition of
phosphogypsum.
2. The dry unit weight of the reference mix decreased
and the optimum moisture content increased with The unconfined compressive strength of the
bentonite increased with the addition of 8% lime.
Beyond 8 %, the unconfined compressive strength
decreased.
4. The unconfined compressive strength of the
bentonite + 8% lime increased up to 8%
phosphogypsum. Beyond 8%, the unconfined
compressive strength decreased.
5. The unconfined compressive strength of the
reference mix increased with the addition of sisal
fibers up to 1%. The trend was reversed after that.
6. The unconfined compressive strength of bentonitelime-
phosphogypsum increased with the addition of
sisal fibers and with the increase in curing period.
7. The improvement in post peak region was better for
the reinforced sisal fibers as compared to the
unreinforced soil.
8. The optimum value of lime content,
phosphogypsum content and sisal fiber content in
bentonite- lime phosphogypsum-sisal fiber mixtures
may be taken as 8%, 8 % and 1%, respectively.