Emmanuel Elat | Mechanical and mineralogical characteristics of mortars with crushed and river sand

Abstract: The aim of this study is to characterize the mixtures of crushed sand and river sand for an optimal use in the formulation of mortars and concretes. Physical, chemical and mineralogical characterization of aggregates was done, followed by the formulation of mortars by substituting 100%, 50% and 0% of river sand by crushed sand. The compressive strength and the water porosity were measured on mortar specimens, completed by a microstructural characterization using XRD, DTG, and SEM examinations. The results showed that ettringite, CSH and portlandite contents are similar in tested mortar while a slight difference of carbonation appeared with a lower carbonation in crushed sand. Besides, 100% river sand mortar was highly porous, with low compressive strength at 28 days, compared to crushed sand mortars containing more fines, less porous and with better compressive strength.

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Видео Emmanuel Elat | Mechanical and mineralogical characteristics of mortars with crushed and river sand канала fib International Federation Structural Concrete