Sunday, February 9, 2014
Types of Admixtures used in concretes with there functions are as follows
AIR ENTRAINING
improves durability, workability, reduces bleeding, reduces freezing/thawing problems (e.g. special detergents)
SUPERPLASTICIZERS
increase strength by decreasing water needed for workable concrete (e.g. special polymers)
RETARDING
delays setting time, more long term strength, offsets adverse high temp. weather (e.g. sugar )
ACCELERATING
speeds setting time, more early strength, offsets adverse low temp. weather (e.g. calcium chloride)
MINERAL ADMIXTURES
improves workability, plasticity, strength (e.g. fly ash)
PIGMENT
adds color (e.g. metal oxides)
AIR ENTRAINING
improves durability, workability, reduces bleeding, reduces freezing/thawing problems (e.g. special detergents)
SUPERPLASTICIZERS
increase strength by decreasing water needed for workable concrete (e.g. special polymers)
RETARDING
delays setting time, more long term strength, offsets adverse high temp. weather (e.g. sugar )
ACCELERATING
speeds setting time, more early strength, offsets adverse low temp. weather (e.g. calcium chloride)
MINERAL ADMIXTURES
improves workability, plasticity, strength (e.g. fly ash)
PIGMENT
adds color (e.g. metal oxides)
