RT Journal Article
T1 Reactive belite stabilization mechanisms by boron-bearing dopants
A1 Cuesta-García, Ana María
A1 Losilla, Enrique R.
A1 García-Aranda, Miguel Ángel
A1 Sanz, Jesús
A1 Gómez-de-la-Torre, María de los  Ángeles
K1 Cemento
AB Belite-rich cements hold promise for reduced energy consumption and CO2 emissions, but their use is hinderedby the slow hydration rates of ordinary belites. This drawback may be overcome by activation of beliteby doping. Here, the doping mechanism of B and Na/B in belites is reported. For B-doping, three solid solutionshave been tested: Ca2-x/2□x/2(SiO4)1-x(BO3)x, Ca2(SiO4)1-x(BO3)xOx/2 and Ca2-xBx(SiO4)1-x(BO4)x. Theexperimental results support the substitution of silicate groups by tetrahedral borate groups with the concomitantsubstitution of calcium by boron for charge compensation, Ca2-xBx(SiO4)1-x(BO4)x. Otherwise, thecoupled Na/B-doping of belite has also been investigated and Ca2-xNax(SiO4)1-x(BO3)x series is confirmedto exist for a large range of x values. Along this series, α'H-C2S is the main phase (for x≥0.10) and is singlephase for x=0.25. Finally, a new structural description for borax doping in belite has been developed forα'H-Ca1.85Na0.15(SiO4)0.85(BO3)0.15, which fits better borax activated belite cements in Rietveld mineralogicalanalysis
PB Elselvier
SN 0008-8846
YR 2012
FD 2012-01-27
LK http://hdl.handle.net/10630/8019
UL http://hdl.handle.net/10630/8019
LA eng
NO Cement and Concrete Research 42 (2012) 598–606
NO This work has been supported by Spanish Ministry of Science andInnovation through MAT2010-16213 research grant which is cofundedby FEDER.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026