reported that lightweight concrete
with a slump value of 50e75 mm is similar to a normal concrete
with 100e125 mm slump value, which is adequate for site application.
The slump value of mix M37.5 was 50 mm, which showed
that the workability of OPS concrete containing OPBC sand up to
37.5% is still acceptable. However, mix M50 showed a significantly
lower slump value than mix M, which means that vibration is
difficult. This concrete needs a special vibration process to obtain
good compaction. Therefore it needs more energy consumption for
placement.