Effect of curing temperature on the early and later ages behaviour of Metakaolin blended cement mortars: hydration heat and compressive strength
Authors : Mamel Abdelli, Walid Deboucha, Nordine Leklou, Johnson Alengaram, M. Nadjib Oudjit
Article : Articles dans des revues internationales ou nationales avec comité de lecture
Cement is one of the main sources of negative environmental impact of concrete. One way to
reduce this impact of concrete could be through the reduction of the cement content. This
could be achieved by replacing a part of cement with mineral additives such as fly ash, blastfurnace
slag, silica fume, metakaolin (MK), etc. in concrete. In this paper, the effect of curing
temperature on MK blended cements is investigated. Isothermal calorimetry and compressive
strength tests are performed on mortars prepared with various replacement levels of cement
by MK (5%, 15% and 25%) and cured at different temperatures (10°C, 20°C and 40°C). Further,
water porosity test and microscopic observations were carried out to confirm the findings.
Results showed that the pozzolanic activity of MK is conditioned by the curing temperature and
its levels of replacement.