The Manufacturing Process and Quality Control of Calcined Clays in Cement Plants and their PC/CC Blended Cements. Brief summary in images.
Image gallery of the calcined clays process in the cement industry: extraction, calcination, and quality control.
Thermally activatable clay quarry because its final Al2O3r– (%) content was considerable. This content was determined using the wet chemical analytical method of R. Talero.
Thermally activatable red clay because its final Al2O3r– (%) content was considerable (R. Talero method) and its grey colour, after activation and reduction, whose Fe2O3 content was much higher than 4% and kaolinite content < 40%.
Different samples of thermally activated red clay at different temperatures and aerobic conditions. Each sample was obtained in an industrial kiln at a specific age (time:hour). The LOI and colour parameter “a” value for each sample is given.
Portland clinker kiln retrofitted to manufacture Calcined Clay (CC) at the appropriate temperature and transition rate of its matrix clay. The kiln may or may not be in use due to its useful life finished. Which one is it? Guess!
Portland clinker kiln retrofitted to produce Calcined Clays (CC) at the appropriate temperature and transition speed of the matrix clay. The kiln may or may not be in use due to its useful life finished.
5 Samples of calcined clay at different temperature: 700, 800 and 850 ºC, respectively, and aerobic conditions. Matrix clay or raw clay is common.
3 Samples of calcined clay at different temperature: 700, 800 and 850 ºC, respectively. Matrix clay or raw clay is common.
UNE 80225:2012 Standard. Methods of testing cements. Chemical analysis. Determination of reactive (SiO2r–) content in cements, pozzolans and fly ash (Phase 1: determination of “raw” SiO2 content in NaOH and HCl solutions) (or EN 196-2:2014 Standard).
UNE 80225:2012 Standard. Methods of testing cements. Chemical analysis. Determination of reactive (SiO2r–) content in cements, pozzolans and fly ash (Phase 2: Insoluble residue determination in HCl and KOH solutions) (or EN 196-2:2014 Standard).
EN 196-3:2005 Standard. Methods of testing cement. Part 3. Determination of setting times and soundness [shaking table to determine, above all, the water amount for the normal consistency of PC (%) / CC (%) + LF (%) pastes].
