“Approximate Composition of Portland Cement, Table”的意思、由来-百科全书

Approximate Composition of Portland Cement, Table

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

soils

See as table:

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

词条	Approximate Composition of Portland Cement, Table
释义	Approximate Composition of Portland Cement, Table 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 soils See as table: Source: American Concrete Institute, Guide to the Selection and Use of Hydraulic Cements* (1985).
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