Development Of Eco-Friendly Concrete: Research On The Use Of Coffee Husk Ash As A Sustainable Alternative

The production of Ordinary Portland Cement (OPC) used in construction results in CO2 emissions.An alternative to produce eco-friendly concrete is to partially incorporate Coffee Husk Ash (CHA) instead of OPC and add Banana Stem Sap (BSS).The effect of CHA and BSS inclusion on the mechanical properties and CO2 emissions of concrete was analyzed.Three research scenarios were designed with partial substitution/addition percentages: 2%, 4%, 6%, 8%, and 10%.The first scenario involves partially replacing OPC with CHA (ACHA), the second involves adding BSS (ABSS), and the third involves the combination of ACHA and ABSS (SAA).Reduction in settlement was observed in the mixtures with ACHA, while it increased in ABSS and SAA.Compressive strength increased in all three scenarios, with the optimal percentage being 4% for ACHA and ABSS, and 6% for SAA.CO2 emissions decreased when replacing OPC with CHA.The new concrete is presented as an option to mitigate CO2 emissions in construction.Use technical civil engineering terminology.