OK i have a question regarding cement type. What types can you not use and why? If i remember correctly you can use type I,II, & V. What about type III? Why cant you use this? According to wikipedia..here are the differences between types. Are any of these large enough to make a difference?
Type I
55% (C3S), 19% (C2S), 10% (C3A), 7% (C4AF), 2.8% MgO, 2.9% (SO3), 1.0% Ignition loss, and 1.0% free CaO.
Type II
51% (C3S), 24% (C2S), 6% (C3A), 11% (C4AF), 2.9% MgO, 2.5% (SO3), 0.8% Ignition loss, and 1.0% free CaO.
Type III
57% (C3S), 19% (C2S), 10% (C3A), 7% (C4AF), 3.0% MgO, 3.1% (SO3), 0.9% Ignition loss, and 1.3% free CaO.
Type V
38% (C3S), 43% (C2S), 4% (C3A), 9% (C4AF), 1.9% MgO, 1.8% (SO3), 0.9% Ignition loss, and 0.8% free CaO.
If you would like to read the descriptions and other information on Portland Cement follow the link, I dont feel like pasting it all into the window...
http://en.wikipedia.org/wiki/Portlan...ortland_cement
Cheers,
Sean