Abstract
Multiple physicochemical and microstructural techniques were successfully conducted to characterize materials and cement composites induced to delayed ettringite formation (DEF). Backscattered electron diffraction, with elemental analysis by energy dispersive spectroscopy in a scanning electron microscope, showed a natural sand with strained quartz and other minor minerals. DEF was observed in distinctive behaviors for mortars and concretes regarding expansion, being quasi-linear and sigmoidal, respectively. Concrete specimens registered high expansions at 450 days (about 0.40%). The resulting effects between composites were distinctive for microstructural and mechanic evolution, especially the modulus of elasticity, with a decrease of 51%, on average.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
