Investigation of the effect of current in zeolite-graphene oxide additives of mortar and development of a novel method for determining the setting time

Abstract

In this study, 0%, 5%, 10%, 15%, and 20% by weight zeolite were added in the 300 dosages (amount of cement in mortar) mortars with a water/cement ratio of 0.90 instead of cement. Mortar production was produced by using a 4 cm × 4 cm x 16 cm wooden mold. Experiments were carried out under room temperature conditions. While the mortars were fresh, a stress intensity of 22.5 V was applied to some samples for one day through a direct current (DC) power source. Other samples were used as references for comparison. It was concluded that the most suitable zeolite additive ratio was 15%. It is aimed to investigate the effect of graphene oxide and zeolite on the physical and mechanical properties of the mortar when used together. Therefore, 15% zeolite and 0.025% graphene oxide added samples by weight were produced instead of cement. A noticeable improvement was observed in 7-day and 28-day compressive strengths when zeolite and graphene oxide were added together in cement-based mortars. Another result obtained from this study is that the initial setting time could be determined accurately with the surface moisture measurement of cement-based materials.