Compression Behaviour of Monofilament PVA Fibre Reinforced Cemented Toyoura Sand
Keywords:
Fibre reinforced sand; cemented sand; oedometer test; normal compression line (NCL).Abstract
In this research work, one-dimensional (1D) oedometer load-unload tests are performed on
unreinforced monofilament PVA (poly vinyl alcohol) fibre alone, cement only, and Toyoura sand specimens
with fibres and cement to evaluate compression behaviour and obtain critical state line slope
( ), elastic loading and unloading line slope ( ) and K0 normal compression line (N or K0 NCL) parameters.
The K0 NCL of monofilament PVA fibre only, cement only, and Toyoura sand specimens containing
monofilament PVA fibres plus cement is shown to differ from that of clean cohesionless samples. The
addition of additives (fibre and/or cement) to cohesionless soil (Toyoura sand) has no effect on the K0 NCL
slope, but increasing the amount of these additives pushes it beyond the K0 NCL of unreinforced sand. It
demonstrates that cementitious connections and lock-in influence caused by short discrete/ monofilament
PVA fibres are strong enough in contrast to clean sand particles. The migration of the K0 NCL to the right has
been recorded in the prior literature for monofilament PVA fibre only, cement only, and Toyoura sand
specimens containing fibres and cement. The findings of this investigation are consistent with previous
studies.
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