Alite-belite-ye'elimite cements: Effect of dopants on the clinker phase composition and properties. (January 2019)

• Record Type: Journal Article
• Authors: Zea-Garcia, Jesus D.; Santacruz, Isabel; Aranda, Miguel A.G.; De la Torre, Angeles G.
• Is Part Of: Cement and concrete research. Volume 115(2019)
• Page Start: 192
• Page End: 202
• Publication Date: 2019-01
• Subjects: Clinkering -- Ca3SiO5 -- 3CaO·3Al2O3·CaSO4 -- C2S polymorphism -- Boron -- Fluor -- Zinc -- Alkaline oxides -- X-ray diffraction & Rietveld method -- EDS; Cement -- Periodicals; Cement -- Research -- Periodicals; Concrete -- Periodicals; Concrete -- Research -- Periodicals; Ciment -- Périodiques; Béton -- Périodiques; Cement; Concrete; Periodicals; 620.135
• DOI: 10.1016/j.cemconres.2018.10.019
• Languages: English
• ISSNs: 0008-8846

Abstract

Abstract: Clinkers with alite-belite-ye'elimite (ABY) are considered as eco-friendly cements. Clinkering (2 Kg) of two types of ABY clinkers was optimized: standard-ABY, with CaF2 and ZnO as dopants (32.6 wt% alite, 30.4 wt% β-C2 S and 15.6 wt% ye'elimite) and αABY, with CaF2, ZnO, B2 O3, Na2 O (14.4 wt% alite, 37.1 wt% β-C2 S, 18.5 wt% α′H -C2 S and 7.5 wt% ye'elimite). Zn and F were mainly incorporated in alite and ferrite as dopants determined by EDS semi-quantitative analysis. The effect of dopants on the hydration of the cement mortars has been tested. Thus, standard-ABY develops 29.9 MPa compressive strengths at 1 day while αABY does 16.8 MPa, mainly due to the higher amount of alite of the former. The presence of α′H -C2 S in αABY increases mechanical strengths at 28 days of hydration from 44.7 MPa of standard-ABY to 74.9 MPa.