Page 12 - ConcreCem - State of the Art

Figure 4.3: Steps in preparation samples
4.2 ConcreCem with ground granulated blastfurnace slag
Designs with a blend of Ordinary Portland Cement, ground granulated blast furnace slag and ConcreCem were prepared. Table 4.2 shows the results known so far and figure 4.4 gives these results in a graph.
Table 4.2: Compressive strength of a Blend I CEM I 52,5 R VS. (70% CEM I 52,5 R + 30% ground granulated blast furnace slag) and ConcreCem
Age samples [days]
Compressive strength [N/mm2]
Blend I:
Blend + 0,0% ConcreCem
Blend II:
Blend + 0,3% ConcreCem
Blend III:
Blend + 0,6% ConcreCem
1 3,1
2 10,5
7 31,6
28 48,6
56 54,9 “Source: 316.002_811-13”
Compared to the reference (Blend I) adding ConcreCem can
stunning result, keeping in mind that the reference mixture is prepared with the best cement type within this application field available. Also after 28 days the compressive strength of the blends with ConcreCem is approximately 14% higher in compressive strength compared to the reference mixture.
100% 4,0 100% 11,3 100% 35,5 100% 55,0 100% 57,5
129% 3,6 116% 108% 11,7 111% 112% -- 113% 55,3 114% 105% 58,0 106%
improve the compressive strength after 1 day with 29%. This is a
60,0 50,0 40,0 30,0 20,0 10,0
Compressive strength development of Blend
(Blend = 70% CEM I 52,5R + 30% Ground Granulated Blastfurnace Slag)
Blend I: Bl Blend II: B
end + 0,0% ConcreCem lend + 0,3% ConcreCem
Blend III: Blend
+
0,6% ConcreCem
0,0
0 7 14 21 28 35 42 49 56
Age of specimen (days)
Figure 4.4: Results compressive strength of Blends (CEM I 52,5R + ground granulated blastfurnace slag) + ConcreCem
Page 12
Compressive strength [N/mm2]