Effect of superplasticizer on the fresh and hardened properties of mortars prepared with different types of cement produced from the same clinker

In recent years, extensive research has been done on using superplasticizers as a chemical additive in concrete. However, these studies generally compare the effects of superplasticizers on cements of different compositions. This paper presents data from laboratory tests of mortars prepared with various cement types produced from the same clinker at the same plant. Increasing dosages of superplasticizers (i.e. 0.8%, 1.0% and 1.2%) were added to CEMI, CEMII, CEMIII and CEMIV cements produced from the same clinker. The effects of superplasticizers on the workability and strength were analyzed by fresh and hardened mortar tests. The results showed that clinker played the main role when superplasticizer was used. Other modifications made to that cement, had a minor effect only. The use of superplasticizers improved cement behavior, increased flowability and reduced water requirement, regardless of cement type. Moreover, the flexural and compressive strengths increased since the addition of superplasticizers improved the compressibility of the mortar.