O.A. Martinez-Aguilar, P. Castro-Borges
The effect of various additives (Ca(OH)2, K2SO4, Na2SO4, Al2(SO4)3) was evaluated on the hydraulic character and stability of pastes containing 50–75% Fluorgypsum, 15–30% Portland cement, and 10–20% Blast furnace slag. Characterization methods included length changes, compressive strength testing, scanning electron microscopy (SEM), differential thermal analysis (DTA), and X-ray diffraction (XRD). Results indicated that the combination of Na2SO4 and Al2(SO4)3 led to early strength development but resulted in detrimental expansions and strength losses after 90 days of curing, whereas the sole use of K2SO4 contributed positively to both strength and dimensional stability. The type of additive was found to exert a more significant influence on the hydraulic stability and strength than the proportions of cement and slag used. XRD revealed the presence of phases such as anhydrite, gypsum, ettringite, CaCO3, and an unidentified phase; the interactions among these phases were proposed to elucidate the cement behavior. SEM observations confirmed that the reaction between cement and slag produced calcium silicate hydrate (C–S–H), which enhanced the material's hydraulic properties by enveloping the gypsum crystals.
@article{fa72055d-dcf7-407d-b7b1-83f6051bb284,
title={Hydraulic binders of Fluorgypsum–Portland cement and blast furnace slag, stability and mechanical properties},
author={O.A. Martinez-Aguilar and P. Castro-Borges},
year={2010},
language={es}
}TY - JOUR TI - Hydraulic binders of Fluorgypsum–Portland cement and blast furnace slag, stability and mechanical properties AU - O.A. Martinez-Aguilar AU - P. Castro-Borges PY - 2010 LA - es ER -
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