Abstract
Influence of composition of solid samples with fluidized bed combustion product, two types of cement binders and NaCl (as a chosen additive) on the compressive strength and the characteristics of microstructure of samples after 2 years of hardening were studied. NaCl causes marked increase of compressive strength after 28, 360 and 720 days of hardening. After 720 days of hardening the following detectable products of hydration are present in the samples: gypsum, portlandite, ettringite, hydroxylellestadite (Hexel — Ca 10(SiO 4) 3(SO 4) 3(OH) 2). Relationships between characteristics of X-ray diffraction analysis and compressive strength of specimens after 720 days were found.
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