Evaluation of Mortar Properties Utilizing Partial Cement Substitution with Jarosite

Abstract

Abstract This experimental study examines the use of Ordinary Portland Cement 43 grade in combination with jarosite as a partial cement substitute. Various cement pastes were formed, including a control paste without jarosite (J0) and pastes (J5 to J30) with 5%, 10%, 15%, 20%, 25%, and 30% jarosite replacement. The objective of this study is to evaluate the effect of jarosite on the normal consistency, initial setting time, and ultimate setting time of cement paste. Incorporating up to 30% jarosite as a cement substitute significantly increases the normal consistency, initial setting time, and ultimate setting time compared to the control mix by 43.10%, 96.10%, and 22.70%, respectively. The results demonstrate the potential of jarosite as an advantageous replacement material for improving mortar properties. Notably, mixture J15 has the highest compressive strength, measured 37.42 N/mm2 at 7 days and 51.37 N/mm2 at 28 days. Although compressive strength decreases with increasing levels of jarosite replacement, it remains preferable to that of the control mix up to J25.