Replacement of cement with supplementary cementitious materials (SCMs) is a proven method to reduce clinker in and contribute decreased CO2 emissions. Natural clays are commonly occurring that do not possess pozzolanic activity their original state. Mechanochemical activation (MCA) can be an alternative sustainable enhance reactivity. In this study, the reactivity three natural clays, originati...

Vold's mathematical analysis of the d.t.a, curve has been applied to Murray's data on the dehydration of clays. Owing to experimental uncertainties, values for the heats of dehydration are lower than those determined by other methods. The first ruder law is obeyed and the activation energies of dehydration are of the same order as those derived from isothermal data; rates of dehydration are, ho...

-A high-charge smectite from Arizona [cation-exchange capacity (CEC) = 120 meq/100 g] and a low-charge smectite from Wyoming (CEC = 90 meq/100 g) were used to prepare homoionic tetramethylammonium (TMA)-clay complexes. The adsorption of benzene, toluene, and o-xylene as vapors by the dry TMA-clays and as solutes from water by the wet TMA-clays was studied. The adsorption of the organic vapors b...

Three Moroccan clays, denoted A1, A3 and A5, were sampled from the Fez region with aim of potential use as aluminosilicate precursors for geopolymer synthesis. Each clay was subjected to calcination at 700 °C analyzed using DTA/TG, grain size distribution measurements, XRD, FTIR spectroscopy before after heat treatment. The results showed that three clays contain kaolinite in different proporti...