(57) Hydraulic cements, such as Portland cements and other cements that include substantial quantities of tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminate (C3A), and/or tetracalcalcium aluminoferrite (C4AF), are optimized to have increased reactivity and/or decreased water demand compared to hydraulic cements of similar chemistry and fineness. Increasing hydraulic cement reactivity increases early strength development and release of reactive calcium hydroxide, both of which enhance pozzolan replacement and 1-28 day strengths compared to blends of conventional Portland cement and one or more pozzolans, such as fly ash, slag or natural pozzolan. Decreasing the water demand improves workability, reducing the need for water reducers and other chemical admixtures. It can also reduce shrinkage.
(71) Roman Cement, LLC, Bountiful, Utah 84010 (US)
(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES Fl FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR