SETTING AND HARDENING OF GYPSUM PORTLAND-CEMENT SILICA FUME BLENDS, PART 2 - EARLY STRENGTH, DTA, XRD, AND SEM OBSERVATIONS

Authors
Citation
K. Kovler, SETTING AND HARDENING OF GYPSUM PORTLAND-CEMENT SILICA FUME BLENDS, PART 2 - EARLY STRENGTH, DTA, XRD, AND SEM OBSERVATIONS, Cement and concrete research, 28(4), 1998, pp. 523-531
Citations number
6
Categorie Soggetti
Construcion & Building Technology","Material Science
ISSN journal
00088846
Volume
28
Issue
4
Year of publication
1998
Pages
523 - 531
Database
ISI
SICI code
0008-8846(1998)28:4<523:SAHOGP>2.0.ZU;2-U
Abstract
The present work describes a study of setting and hardening of fresh b lends of gypsum binder, Portland cement, and silica fume. Such blends can possess the advantages of gypsum (early hardening, high early stre ngth, enhanced workability) and Portland cement (improved durability i n moist conditions), but are free of the deleterious effect of ettring ite and thaumasite, which an formed when gypsum and Portland cement in teract. In part 1, the temperature and setting expansion dependencies in time are described. The influence of superplasticizer on setting an d hardening of gypsum, gypsum-cement, and gypsum-cement-silica fume mi xes is analyzed. In part 2, the data of early strength, DTA, XRD, and SEM observations are reported and discussed. (C) 1998 Elsevier-Science Ltd.