It　is　unclear　whether　the　utilisation　of　fly　ash　as　valuable　resource　is　preferable　to　landfill　disposal　from　the　resource　perspective.　The　objective　of　this　study　was　to　evaluate　and　compare　the　resource　consumption　of　fly　ash　utilisation　in　a　cement　clinker　system　compared　to　landfill　disposal.　The　results　indicated　that　when　fly　ash　is　used　as　substitute　for　clay,　resource-saving　potential　of　clinker　system　reached　147.47　MJ/t-clinker.　The　comparative　analysis　displayed　that　exergy-based　resource　consumption　is　reduced　by　2,020.48　MJ　when　1　t　fly　ash　used　in　a　clinker　system　instead　of　landfill.