evaluation of the sustainability (assessment) of pozzolanic cements exposed to chemical attack

The purpose of this work is to evaluate the performance of formulated pozzolanic cement (clinker, gypsum and calcined clay) by studying mechanism of deterioration of the mortar: acid deterioration. To do this, we used cubic mortars of 5x5x5 cm3. After storing the specimens at 28 days in water, they are put in acid solutions of the same concentration 5% (HCl, CH3COOH). The loss of mass and the loss mechanical strength of the test pieces, as well as the monitoring of the pH reading of each attack solution, are the various tests carried out to study the sustainability of the mortars. The results obtained make it possible to highlight the beneficial effect of the addition of calcined clay TIT1 on durability.