04/05/2022
Portland Cement Type II provides moderate sulfate resistance, and gives off less heat during hydration. This type of cement costs about the same as type I. Its typical compound composition is:51% (C3S), 24% (C2S), 6% (C3A), 11% (C4AF), 2.9% MgO, 2.5% (SO3), 0.8% ignition loss, and 1.0% free CaO.
Standards
ASTM C150
EN197
Compressive Strength
7 Days= 410-460 Kg/Cm^2
28 Days= 550-590 Kg/Cm^2
Fineness
3700-4100 Cm^2/g
Final Setting Time
110 -150 Mins
A limitation on the composition is that the (C3A) shall not exceed 8%, which reduces its vulnerability to sulfates. This type is for general construction exposed to moderate sulfate attack, and is meant for use when concrete is in contact with soils and ground water, especially in the Philippines due to the high sulfur content of the soils.
Because of similar price to that of type I, type II is much used as a general purpose cement, and the majority of Portland cement sold in the Philippines meets this specification.
Type II cement can be used in structures of considerable mass, such as large piers, heavy abutments, and heavy retaining walls. Its use will reduce temperature rise -- especially important when the concrete is placed in warm weather.
