Effect of Blast Induced Ground Vibrations on Green Concrete at Mumbai Metro Rail Project

Abstract

In mining, civil construction projects drilling and blasting method widely used for rock excavation. Due to rock
blasting many problems may occur such as flyrock, vibrations and etc. In fact 38-40 % explosive energy utilising to
produce vibrations only. [2] These blast induced ground vibration may cause damage newly performed bed
concreting layers in construction process. There also arise similar problems in mining, where concrete supporting is
required in drivages of weak rock. Therefore, investigation of on Effect of Blast Induced Ground Vibrations on
Green Concrete and determining reasonable time gap and distance between blasting work and concreting is of great
importance.
This paper presented review on effect of Vibrations on green concrete. The recommendations given by various
researchers are broad and general in nature. This research attempted to correlate the strength acquired by the concrete
with the threshold maximum vibration level. In this research, experimental blasts carried out during base slab
concrete works of a Metro construction works in Mumbai. Peak Particle Velocity (PPV) recorded by using
seismographs. Effect of PPV on green concrete strength with respect to time. This paper presented difference in
strength of green concreate, which is exposed to blast vibrations with strength of green concrete without exposing
vibrations with respect to age of green concreate.