Basic Properties of Pastes, Mortars and Concrete Containing Strength Enhancing Mineral Admixture

Abstract

This research was aimed to study the basic properties of concrete containing strength enhancing mineral admixture (SA). The SA was used to add and partial replacement of 5.5, 6.5 and 7.5% by weight of Portland cement type 1 (OPC). The study found that the autoclave expansion of paste containing SA was lesser than that of OPC paste. The autoclave expansion of paste containing SA with partial replaced was lower than that of paste contained SA addition. Moreover, the more SA was mixed, the more autoclave expansion occurred. Furthermore, mortar containing SA having expanded in calcium hydroxide solution was more than OPC mortar. The expansion in calcium hydroxide solution of mortar containing SA with partial replaced was lower than that of mortar contained SA addition. In addition, the more SA was used, the more expansion in calcium hydroxide solution occurred. Besides, slump and slump loss of concrete containing SA was lower whereas its setting time was higher when compared to those of OPC concrete. Nevertheless, whether the more or less using SA quantity, the result of slump, slump loss and setting time of concrete would be the same. Finally, compressive strength of concrete contained SA addition was higher than that of OPC concrete. Whereas the compressive strength of concrete containing SA with partial replaced had the same tendency lower than or close to that of OPC concrete. The different of using SA quantity, the compressive strength of concrete was no different.  As well, tensile strength of concrete containing SA had the same tendency to that of OPC concrete.