The interconnection of vesicles in basaltic flows
greatly affects the engineering properties such as uniaxial
compressive strength, modulus of elasticity, Poisson’s
ratio, tensile strength and sonic velocities. Sometimes these
vesicles are filled with secondary minerals such as
quartz/olivine/calcite form as amygdules (which are
impermeable). In the present study, to understand effect of
porosity, vesicular and amygdular basaltic flows collected
from central and west-central India were investigated for
these engineering properties and correlated with apparent
porosity of core samples. It is observed that a good level of
correlation is obtained for uniaxial compressive strength
(UCS), elastic modulus (E) and Poisson’s ratio in vesicular
basalts when porosity >8-10%. In case of Brazilian
strengths a linearly downward trend is observed with the
increase in porosity values. And, no significant correlation
is observed for waves’ velocities in both variants of basalts.
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