Blended cement type A

This type of cement can be categorized in blended cement group and is produced in two types, A and B. In type A, a maximum %20 of additives are used in the clinker; it is useful for all constructional activities including the foundations. Although in comparison with the cement type 2, the clinker percentage is reduced from %96 to only %80, its 28-day strength, according to the Iranian National Standard, must be at least 32.5 mega-Pascal

Technical Specifications

*Chemical Analysis
-
Loss on Ignition
%4.0
-
SiO2
%23.1
-
Al2O3
%6.1
-
Fe2O3
%3.7
-
CaO
%58.7
-
MgO
%2.2
Max = 5
SO3
%2.1
Max = 3.5
Cl
%0.03
Max = 0.1
Insoluble Residue
-
-
Free CaO
%1.5
-
Alkalies(Na2O%+0.658 K2O%)
-
-
C3S
-
-
C2S
-
-
C3A
-
-
C4AF
-
-
*Physical Tests
-
-
Fineness/Blaine
cm2/g)3400)
Min = 2800
Fineness/Residue On Sieve 90µ
%3.0
-
Setting Time/Initial
Minute170
Min = 75
Setting Time/Final
Hour 3:20
Max = 6
Compressive Strength/3 Days
Kg/cm2 160
-
Compressive Strength/7 Days
230 Kg/cm2
Min=160
Compressive Strength/28 Days
Kg/cm2 340
Min=325
Soundness/Autoclave Expansion
%0.08
Max=0.8