Concrete is the most widely used material in today's infrastructure needs all around the world. The production of Portland cement is however expensive, energy intensive, and results in globally significant GHGs emissions. Production of Portland cement, contributes to over 7% of worldwide GHGs which is equal to 1.6 billion tons of GHGs. On average, production of each ton of portland cement results in releasing one ton of CO2. Current average consumption of concrete is about one ton per year per every living human being, according to the International Energy Agency. And hence, there is a significant and positive global impact, even small reductions in GHGs emissions. Natural pozzolans, such as pumice, can be used in concrete as a partial replacement for Portland cement, lowering production costs and GHGs emissions while also improving concrete performance. Pumice as a cement alternative in ordinary concretes could pave the way to a more sustainable future. Furthermore, pumice is abundant in the Eastern and northern regions of Ethiopia, as seen by Ethiopian industrial mineral occurrence map, thus it may be an interesting option. This paper summarizes the findings of a study that looked into the impact of partially replacing GP with cement on the physical and mechanical properties of concrete. To determine the influence of ground pumice on compressive strength and tensile strength of standard concrete, eight concrete mixtures with varying pozzolana levels up to 30% were cast and evaluated. It should also be noted that the chemical composition and qualities of pumice vary by location, and hence may have varying effects on concrete properties; thus, the data presented here represent materials with specific properties. Based on this investigation, the results indicated that using ground pumice as a cement replacement in normal concrete improved the compressive and tensile strength of normal concrete at 20% replacement ratio.