Interaction between cement and superplasticizer in pozzolanic mineral admixtures

The influence of condensed silica fume, fly ash and metakaolin on the rheological properties, setting times, and compressive strength of mortars with different cements and superplasticizers are sown in this paper. The observed relationships can be used to select superplasticizers compatible with cement and for workability control of fresh mortars and concrete containing pozzolanic mineral admixtures. It is concluded that the interaction of a cement-superplasticizer system must be assessed taking into account the presence of pozzolanic mineral admixtures. Such selection should be performed by also taking into consideration the possible variations of setting times and compressive strength.