TY - JOUR
T1 - Influence of the amount of calcium sulfate on physical/mineralogical properties and carbonation resistance of CSA-based cements
AU - Bertola, F.
AU - Gastaldi, D.
AU - Irico, S.
AU - Paul, G.
AU - Canonico, F.
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/1
Y1 - 2022/1
N2 - Binary and ternary binders, Calcium SulfoAluminate (CSA) clinker plus anhydrite (A) and blends of Portland cement, CSA clinker, and A, respectively, are examined in order to understand the effect of the A/CSA clinker ratio (A/CSA) on hydration process, physico-mechanical properties and durability against carbonation. The study revealed that: (i) in binary systems the increase of the A/CSA has a positive influence on the physical performance, but worsens the resistance against carbonation (ii) in ternary systems a non-linear behavior related to the physical aspects is observed, being the system with the intermediate A/CSA the best performer in terms of dimensional stability and carbonation resistance. The effect of carbonation on the hydrate phase assemblage was studied through a multi-technique approach and results were supported by thermodynamic models, indicating that the optimal dosage of sulfates is strictly dependent on the carbonation exposure and the ternary systems are more durable than the binary ones.
AB - Binary and ternary binders, Calcium SulfoAluminate (CSA) clinker plus anhydrite (A) and blends of Portland cement, CSA clinker, and A, respectively, are examined in order to understand the effect of the A/CSA clinker ratio (A/CSA) on hydration process, physico-mechanical properties and durability against carbonation. The study revealed that: (i) in binary systems the increase of the A/CSA has a positive influence on the physical performance, but worsens the resistance against carbonation (ii) in ternary systems a non-linear behavior related to the physical aspects is observed, being the system with the intermediate A/CSA the best performer in terms of dimensional stability and carbonation resistance. The effect of carbonation on the hydrate phase assemblage was studied through a multi-technique approach and results were supported by thermodynamic models, indicating that the optimal dosage of sulfates is strictly dependent on the carbonation exposure and the ternary systems are more durable than the binary ones.
KW - Calcium sulfoaluminate cement
KW - Carbonation
KW - Mercury porosimetry
KW - Nuclear magnetic resonance
KW - Thermodynamic modeling
UR - http://www.scopus.com/inward/record.url?scp=85117077492&partnerID=8YFLogxK
U2 - 10.1016/j.cemconres.2021.106634
DO - 10.1016/j.cemconres.2021.106634
M3 - Article
SN - 0008-8846
VL - 151
JO - Cement and Concrete Research
JF - Cement and Concrete Research
M1 - 106634
ER -