iarjetIARJETIARJET2708-516310.47310/iarjet.2025.v06i01.02Strength Characteristics of Paper Ash Blended Cement ConcreteAbout 7% of greenhouse gas emissions globally are attributable to the cement sector into the environment. Alternative binders must be developed to address the costs associated with the building sector and the environmental effects of cement manufacturing, as well as to make the concrete industry sustainable. The partial replacement of cement in concrete with paper ash was investigated as a solution to these research gaps. Sixty concrete cubes with a standard size of 100 mm were also cast and they were immersed in water for 7, 14, 21 and 28 days to cure. The results show that the specific gravity and sand's moisture content and paper ash used were 1.34 and 1.66 and 4.23 and 3.04, respectively. For every replacement pattern, the compressive strength findings showed that strength increased with increasing curing time. 11.61 and 15.02 N/mm2 were the compressive strengths after 7 and 28 days for 0%, whereas 6.32 and 8.10 N/mm2 were obtained for 20%. Strength development for the control concrete was faster a little more than 76% of its 28-day strength was attained in 7 days compared to 62% for 20% replacement level. Though a downward trend in strength development was noticed as the percentage of Paper ash increases, there is the prospect of Paper ash concrete to equal and exceeds control strength as depicted by their convergence towards the control line. In conclusion, paper ash can be utilized to partially substitute cement in concrete due to its pozzolanic qualities. Considering the outcomes, 5% replacement level is recommended.