TY - JOUR
T1 - Study of Alite-Calcium Sulfoaluminate Cement Produced from a High-Alumina Fly Ash
AU - Duvallet, Tristana Y.
AU - Paraschiv, Manuelle
AU - Oberlink, Anne E.
AU - Jewell, Robert B.
AU - Robl, Thomas L.
PY - 2022/1/1
Y1 - 2022/1/1
N2 - The purpose of this research was to produce an alite-calcium sulfoaluminate (A/CSA) cement using high-alumina coal fly ash as raw material in replacement for bauxite. This ash is different from bauxite in terms of mineralogy and would represent a less-expensive bauxite alternative in A/CSA clinkering. The hydration behavior, as well as the mechanical and physical properties including mechanical strength, carbonation, dimensional stability, and resistivity, were determined and compared to high-quality commercial ordinary portland cement (OPC) and CSA cements. The main conclusions include the successful production of A/CSA clinker from high-alumina fly ash, with high contents of alite (30 wt.%) and ye'elimite (51 wt.%) at a low firing temperature. The main hydration products include ettringite and AFm (or alumina, ferric oxide, monosulfate) phases. The A/CSA cement exhibits higher early compressive strength than commercial OPC and CSA cements after 1, 7, and 14 days, and presents similar mechanical properties to CSA cement after 90 days, with no visible carbonation.
AB - The purpose of this research was to produce an alite-calcium sulfoaluminate (A/CSA) cement using high-alumina coal fly ash as raw material in replacement for bauxite. This ash is different from bauxite in terms of mineralogy and would represent a less-expensive bauxite alternative in A/CSA clinkering. The hydration behavior, as well as the mechanical and physical properties including mechanical strength, carbonation, dimensional stability, and resistivity, were determined and compared to high-quality commercial ordinary portland cement (OPC) and CSA cements. The main conclusions include the successful production of A/CSA clinker from high-alumina fly ash, with high contents of alite (30 wt.%) and ye'elimite (51 wt.%) at a low firing temperature. The main hydration products include ettringite and AFm (or alumina, ferric oxide, monosulfate) phases. The A/CSA cement exhibits higher early compressive strength than commercial OPC and CSA cements after 1, 7, and 14 days, and presents similar mechanical properties to CSA cement after 90 days, with no visible carbonation.
KW - Alite-calcium sulfoaluminate
KW - High-alumina fly ash
KW - Hydration process
KW - Mechanical properties
UR - https://www.mendeley.com/catalogue/41da157d-2bdf-38a7-82ab-dcc42696c8b3/
U2 - 10.14359/51734199
DO - 10.14359/51734199
M3 - Article
SN - 0889-325X
VL - 119
SP - 263
EP - 273
JO - ACI Materials Journal
JF - ACI Materials Journal
IS - 1
ER -