Use of mineral fines to reduce clinker content of cementitious compositions

(22) 26.11.2024

(43) 27.03.2025

(57) Cementitious compositions that contain a hydraulic cement with at least one calcium aluminate compound and a sulfate bearing material, at least one SCM that provides aluminates, and a source of supplemental sulfate that reacts with alu¬minates to control setting. The hydraulic cement can be OPC. The SCM can be GGBFS, fly ash, natural pozzolans, ground bottom ash, ground pumice, volcanic ash, calcined shale, metakaolin, trass, steel slag, calcined clay, and/or ground glass. The source of supplemental sulfate can be calcium sulfate hemihydrate, calcium sulfate dihydrate, gyp¬sum, or alkali metal sulfate. The cementitious compositions may further include a mineral filler, one or more aggregates, and one or more performance enhancing admixtures. The cementitious compositions can be a dry blend, a fresh mix containing water, or a hardened composition. Supplemental sulfate can address sulfate deficiencies caused by high clinker reduction, use of water reducers and/or superplasti¬cizers, and SCMs containing aluminates.

(71) ROMAN CEMENT, LLC, Salt Lake City, UT (US)