GYPSUM SET POINT ACCORDING TO SO3 REQUIREMENT

SO3 REQUIREMENT = 1.8%

=(X – Y) / Z

X = REQUIRED % SO3 IN CEMENT (1.8%)

Y= SO3 % AGE IN CLINKER(0.4 TO 0.5%)

Z = SO3 %AGE IN GYPSUM   (41 TO 42 %)

X – Y / Z

=(1.8/100) – (0 .4/100 ) / 41 / 100

=( 0.018 – 0.004 / .41)*100

SET POINT =3.41