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Gypsum anhydrite-slag mixtures were produced by blending anhydrite with granulated blast furnace slag, Ca(OH)2 and small amounts of (Na2SO4)(10H2O) and (FeSO4)(7H2O) 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)2 to form ettringite and tobermorite has been discussed. The correlation between gain in strength and hydration products is reported. The gypsum anhydrite-slag mixtures of low water absorption, high strength and high stability can be produced by blending in equal proportions, duly accelerated by small quantities of Ca(OH)2 and chemical activators ((Na2SO4)(10H2O)+(FeSO4)(7H2O)). The attainment of high strength in the anhydrite-slag mixture is due to rapid conversion of anhydrite into gypsum, through formation of double salts with the activators and due to formation of ettringite and tobermorite compounds. The development of high strength and stability of anhydrite-slag mixtures may be utilized in making prefabricated building materials such as boards, tiles, artificial marble, masonry etc.
Gypsum anhydrite-slag mixtures were produced by blending anhydrite with granulated blast furnace slag, Ca(OH)2 and small amounts of (Na2SO4)(10H2O) and (FeSO4)(7H2O) 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)2 to form ettringite and tobermorite has been discussed. The correlation between gain in strength and hydration products is reported. The gypsum anhydrite-slag mixtures of low water absorption, high strength and high stability can be produced by blending in equal proportions, duly accelerated by small quantities of Ca(OH)2 and chemical activators ((Na2SO4)(10H2O)+(FeSO4)(7H2O)). The attainment of high strength in the anhydrite-slag mixture is due to rapid conversion of anhydrite into gypsum, through formation of double salts with the activators and due to formation of ettringite and tobermorite compounds. The development of high strength and stability of anhydrite-slag mixtures may be utilized in making prefabricated building materials such as boards, tiles, artificial marble, masonry etc.
Activation of gypsum anhydrite-slag mixtures
Aktivierung von Gips-Anhydrit-Schlacken-Mischungen
Cement and Concrete Research ; 25 ; 332-338
1995
7 Seiten, 3 Bilder, 2 Tabellen, 9 Quellen
Article (Journal)
English
Hochofenschlacke , Bindemittel , Gips , Schlacke , chemische Reaktion , Natriumsulfat , Chlorid , Druckfestigkeit , Differenzialthermoanalyse , Infrarotstrahlung , Calciumaluminatsulfathydrat , hydraulisches Bindemittel , Anhydrit-Gips , Wasserabbinden von Zement , Tobermorit , Calciumsulfatdihydrat
Activation of Gypsum Anhydrite-Slag Mixtures
| British Library Online Contents | 1995
Activation of Gypsum Anhydrite-Slag Mixtures
| Online Contents | 1995
| Engineering Index Backfile | 1958
| Engineering Index Backfile | 1939
| Engineering Index Backfile | 1928