Characterization of Algerian reservoir sludges for use as active additions in cement: New pozzolans for eco-cement manufacture

摘要

This paper analyzes the chemical, physical, morphological, mineralogical and pozzolanic characteristics\udof several reservoir sludges and assesses their potential for use as 20% additions in blended cement manufacture.\udThe studied sludges exhibit good pozzolanic properties, especially sample 5 which has high\udSiO2, Al2\udO3 and Fe2O3 contents. Blended cements prepared with 20% sludge additions complied with\udthe European standard on compressive strength of one of the standardized cements, above 32.5 MPa at\ud28 days of curing; except for sample 5, which showed similar compressive strength values to the reference\udcement and up to 2% higher values at long curing times.