Portland Pozzolana Cement

This type of cement is used for general applications as for massive structures due to having less hydration heat than the cement type 1 and 2; its most significant specification is the relatively higher chemical strength. This type of cement has been recommended for environments with the risk of sulfate and chlorine attacks. The strength growth rate of this type of cement is lower than cement type 2 and 5, but the strength loss is compensated in long-term. It should be noted that water-cement ratio must not increase too much so as to enhance the workability of the concrete. Due to the low speed and heat of hydration as well as the slow reaction of pozzolana with cement compounds, curing the concrete with pozzolana cement must continuously continue. In other words, concrete curing conditions need more time in comparison with the Portland cement type 2 and 5. 

Technical Specifications

*Chemical Analysis
%1.5
Max = 5
Loss on Ignition
%24.0
-
SiO2
%6.2
-
Al2O3
%3.6
-
Fe2O3
%59.6
-
CaO
%1.8
Max = 5
MgO
%2.5
Max = 4
SO3
%0.03
Max = 0.1
Cl
-
-
Insoluble Residue
%1.50
-
Free CaO
%1.0
-
Alkalies(Na2O%+0.658 K2O%)
-
-
C3S
-
-
C2S
-
-
C3A
-
-
C4AF
(cm2/g) 3200
Min = 3000
*Physical Tests
%2.0
-
Fineness/Blaine
Minute 180
Min = 60
Fineness/Residue On Sieve 90µ
Hour 3:3
Max = 7
Setting Time/Initial
210
Min=100
Setting Time/Final
300
Min=175
Compressive Strength/3 Days
Kg/cm2 430
Min=300
Compressive Strength/7 Days
%0.08
Max=0.8
Compressive Strength/28 Days
Soundness/Autoclave Expansion