Template:Components of Cement, Comparison of Chemical and Physical Characteristics

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Components of cement:
comparison of chemical and physical characteristics[lower-alpha 1][1][2][3]
Property Portland
cement 		Siliceous[lower-alpha 2]
fly ash 		Calcareous[lower-alpha 3]
fly ash 		Slag
cement 		Silica
fume
Proportion by mass (%)
 SiO2 21.9 52 35 35 85–97
Al2O3 6.9 23 18 12 —
Fe2O3 3 11 6 1 —
CaO 63 5 21 40 < 1
MgO 2.5 — — — —
SO3 1.7 — — — —
Specific surface (m2/kg)[lower-alpha 4] 370 420 420 400 15,000
– 30,000
Specific gravity 3.15 2.38 2.65 2.94 2.22
General purpose Primary binder Cement replacement Cement replacement Cement replacement Property enhancer
  1. ↑ Values shown are approximate: those of a specific material may vary.
  2. ↑ ASTM C618 Class F
  3. ↑ ASTM C618 Class C
  4. ↑ Specific surface measurements for silica fume by nitrogen adsorption (BET) method, others by air permeability method (Blaine).
  1. ↑ Holland, Terence C. (2005). "Silica Fume User's Manual" (PDF). Silica Fume Association and United States Department of Transportation Federal Highway Administration Technical Report FHWA-IF-05-016. Retrieved October 31, 2014.
  2. ↑ Kosmatka, S.; Kerkhoff, B.; Panerese, W. (2002). Design and Control of Concrete Mixtures (14 ed.). Portland Cement Association, Skokie, Illinois.
  3. ↑ Gamble, William. "Cement, Mortar, and Concrete". In Baumeister; Avallone; Baumeister (eds.). Mark's Handbook for Mechanical Engineers (Eighth ed.). McGraw Hill. Section 6, page 177.
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