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Green materials are considered as one of the prominent elements in designing an environmentally sustainable construction project. Studies have highlighted cement replacement is a popular method of reducing greenhouse gas (GHG) emissions and replacing virgin materials in concrete. These options incur cost implications through sophisticated designs and technologies. The importance of maintaining a balance between environmental and economic benefits of a green design is critical for the decision making stakeholders in a construction project. However, designers often lack the resources and tools to initiate informed decision making for the optimum selection of a green material. In order to systemize the optimising process, the current study suggests a multi-objective optimisation based decision making framework for optimising the cement replacement materials in concrete. The study aims to present a …