RT Journal Article
T1 Hydration Activation of Alite-Belite-Ye’elimite Cements by Doping with Boron
A1 Zea-Garcia, Jesus D.
A1 Sanfélix, Susana G.
A1 Vallcorba, Oriol
A1 García-Aranda, Miguel Ángel
A1 Santacruz-Cruz, María Isabel
A1 Gómez-de-la-Torre, María de los  Ángeles
K1 Cemento
AB The hydration behavior of two alite-belite-ye’elimite (ABY)cements has been studied. The production of these materials releases intoatmosphere ∼17% less CO2 compared to Portland cement. The ABY cementcontains alite, β-C2S, and ye’elimite as main phases, while dABY (activated byadding borax) contains not only these three phases but also α′H-C2S. The roleof boron in these systems is 2-fold: (i) acting as a retarder at early hydrationages since the precipitation of AH3 gel has been delayed from over 4 h in ABYto over 24 h in dABY; and (ii) as an activator at late hydration ages bystabilizing highly reactive β- and α′H-belites. The degree of hydration of β-C2Sin ABY is 42% at 28 days, while that of β-C2S and α′H-C2S in dABY at thesame age is 80 and 88%, respectively. Moreover, the main hydration products in both systems are ettringite and C−S−H gel. Thelocal structure of these hydrated products has been studied by 27Al and 29Si magic angle spinning nuclear magnetic resonance(MAS−NMR) and found to be similar in both cements. However, the amount of C−S−H gel is 63% of all silicon-bearing phases inABY after 28 days while it is 76% (determined by 29Si MAS−NMR) in dABY, which justifies the higher mechanical strengths ofdABY mortars.
YR 2020
FD 2020
LK https://hdl.handle.net/10630/29078
UL https://hdl.handle.net/10630/29078
LA spa
NO ACS Sustainable Chem. Eng. 2020, 8, 3583−3590
NO BIA2017-82391-R research project I3 (IEDI-2016-0079) program
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026