M.A.G. Aranda
Published: 2013-02-04
Total Pages: 45
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Yeelimite-containing, Ca4Al3O12(SO4), cements are attracting considerable interest for their inherently low CO2 emissions during fabrication, and also because they offer the possibility of tailored properties and performances in the resulting mortars and concretes. Here, we initially disentangle the nomenclature and compositions of these cements and, chiefly, distinguish between yeelimite-rich calcium sulfoaluminate cements (CSA, Al2O3 content ranging between 30 and 40wt%) and belite-rich yeelimite-intermediate (BCSAF, Al2O3 content ~15wt%) cements, also known as sulfobelite. Belite-active BCSAF cement may become an alternative to Portland cement for large-scale structural applications, although more research is still needed. Clinkering, hydration and durability issues of pastes, mortars and concretes derived from yeelimite-containing cements, and their blended cements, are discussed.