Activation of gypsum anhydrite-slag mixtures

Journal Article · Tue Jan 31 23:00:00 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]

---

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

Related Subjects

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