The compressive strength of samples containing fly ash with high content of calcium sulfate and calcium oxide

Authors
Sebok, T Simonik, J Kulisek, K
Citation
T. Sebok et al., The compressive strength of samples containing fly ash with high content of calcium sulfate and calcium oxide, CEM CONCR R, 31(7), 2001, pp. 1101-1107
Citations number
13
Categorie Soggetti
Material Science & Engineering
Journal title
CEMENT AND CONCRETE RESEARCH
ISSN journal
00088846 → ACNP
Volume
31
Issue
7
Year of publication
2001
Pages
1101 - 1107
Database
ISI
SICI code
0008-8846(200107)31:7<1101:TCSOSC>2.0.ZU;2-M
Abstract
Influence of composition of solid samples with fluidized bed combustion pro duct, two types of cement binders and NaCl (as a chosen additive) on the co mpressive strength and the characteristics of microstructure of samples aft er 2 years of hardening were studied. NaCl causes marked increase of compre ssive strength after 28, 360 and 720 days of hardening. After 720 days of h ardening the following detectable products of hydration are present in the samples: gypsum, portlandite, ettringite, hydroxylellestadite (Hexel - Ca-1 0(SiO4)(3)(SO4)(3)(OH)(2)). Relationships between characteristics of X-ray diffraction analysis and compressive strength of specimens after 720 days w ere found. (C) 2001 Elsevier Science Ltd. All rights reserved.