Approximate Composition of Portland Cement, Table

Approximate Composition of Portland Cement, Table

Table 2: Approximate Composition of Portland Cement (ASTM Types I–V)
ASTM type and name composition (%)* characteristics applications
C3S  C2S  C3A  C4AF 
I (Ordinary) 42–65 10–30  0–17  6–18 no special requirements general construction

    (e.g., sidewalks)
II (Modified) 35–60 15–35 0–8 6–18 moderate sulfate resistance,

   moderate heat of hydration drainage systems, sea walls,

    floor slabs, foundations
III (High-early-strength) 45–70 10–30 0–15 6–18 higher strength soon after

    pouring cold-weather construction
IV (Low-heat) 20–30 50–55 3–6 8–15 low heat of hydration massive structures

    (e.g., dams)
V (Sulfate-resistant) 40–60 15–40 0–5 10–18 high sulfate resistance foundations in high-sulfate

See as table:
*Source: American Concrete Institute, Guide to the Selection and Use of Hydraulic Cements (1985).

* * *

Universalium. 2010.

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