Activation of gypsum anhydrite-slag mixtures

Journal Article · Wed Feb 01 00:00:00 EST 1995 · Cement and Concrete Research; (United States)

DOI:https://doi.org/10.1016/0008-8846(95)00018-6· OSTI ID:6493809

Singh, M; Garg, M ^[1]

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1. Central Building Research Inst., Roorkee (India)

Gypsum anhydrite-slag mixtures were produced by blending anhydrite with granulated blast furnace slag, Ca(OH)[sub 2] and small amounts of Na[sub 2]SO[sub 4] [center dot] 10H[sub 2]O and FeSO[sub 4] [center dot] 7H[sub 2]O as activators. A mechanism of conversion of anhydrite into gypsum through transient double salts in presence of activators is suggested. Activation of granulated slag with the gypsum anhydrite and Ca(OH)[sub 2] to form ettringite and tobermorite has been discussed. The correlation between gain in strength and hydration products is reported.

• OSTI ID: 6493809
• Journal Information: Cement and Concrete Research; (United States), Vol. 25:2; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
ANHYDRITE
CHEMICAL ACTIVATION
CEMENTS
MECHANICAL PROPERTIES
GYPSUM
SLAGS
WASTE PRODUCT UTILIZATION
BLAST FURNACES
CALCIUM HYDROXIDES
IRON SULFATES
SODIUM SULFATES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
FURNACES
HYDROGEN COMPOUNDS
HYDROXIDES
IRON COMPOUNDS
MATERIALS
MINERALS
OXYGEN COMPOUNDS
SODIUM COMPOUNDS
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360603* - Materials- Properties
010800 - Coal
Lignite
& Peat- Waste Management