TY - JOUR
T1 - Chloride-binding capacity of ternary concretes containing fly ash and untreated sugarcane bagasse ash
AU - Franco-Luján, Víctor Alberto
AU - Mendoza-Rangel, José Manuel
AU - Jiménez-Quero, Víctor Guillermo
AU - Montes-García, Pedro
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/7
Y1 - 2021/7
N2 - In order to understand the role of untreated sugarcane bagasse ash (UtSCBA) in chloride binding of ternary concretes prepared with fly ash, an experimental program was carried out. Concrete specimens containing only Portland cement, Portland cement + fly ash and Portland cement + fly ash + UtSCBA were manufactured. After curing these specimens were exposed to a chloride solution for 3000 days. After exposure, a microstructural characterization using scanning electron microscopy and X-Ray diffraction was conducted. The compressive strength, electrical resistivity of the concretes and percentage of voids, were also obtained, while information on chloride binding was obtained from the difference between the amount of total and free chlorides. Diffractograms showed that chlorides chemically reacted with the Afm and Aft phases of all concretes to form Friedel's salt. In summary, ternary concretes containing UtSCBA showed the highest chloride-binding capacity.
AB - In order to understand the role of untreated sugarcane bagasse ash (UtSCBA) in chloride binding of ternary concretes prepared with fly ash, an experimental program was carried out. Concrete specimens containing only Portland cement, Portland cement + fly ash and Portland cement + fly ash + UtSCBA were manufactured. After curing these specimens were exposed to a chloride solution for 3000 days. After exposure, a microstructural characterization using scanning electron microscopy and X-Ray diffraction was conducted. The compressive strength, electrical resistivity of the concretes and percentage of voids, were also obtained, while information on chloride binding was obtained from the difference between the amount of total and free chlorides. Diffractograms showed that chlorides chemically reacted with the Afm and Aft phases of all concretes to form Friedel's salt. In summary, ternary concretes containing UtSCBA showed the highest chloride-binding capacity.
KW - Chloride content
KW - Electrical resistivity
KW - Long-term durability
KW - Supplementary cementing materials
KW - Untreated sugarcane bagasse ash
UR - http://www.scopus.com/inward/record.url?scp=85104068644&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2021.104040
DO - 10.1016/j.cemconcomp.2021.104040
M3 - Artículo
AN - SCOPUS:85104068644
SN - 0958-9465
VL - 120
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
M1 - 104040
ER -