Both OPC & ppc are used in concrete.but the usage depends on the strength of the concrete that we should achieve. Generally for low strength concrete that is up to 25Kn/ m2 we use ppc and higher the concrete strength we use OPC
OPC is used for Concrete structure/also for masonry works
also/ But PPc can only used for Masonry works not fit to
use concrete structures. PPC is low heat of hydration no 1
for block/brick works/plastering/flooring works.
Reinforced concrete: suppose you are doing rough estimate
for purchase of rebar for reinforced concrete slab for
single stores residential building. You know total concrete
volume will be 100 m3. How many tons rebar 6, 10 and 12mm
will you require for the project?