Evaluation of carbon emission control potential of ultra-high performance concrete based on life cycle assessment

This study uses the life cycle assessment (LCA) method, combined with a genetic algorithm, particle swarm algorithm, etc., through comprehensive experiments and multi-dimensional simulations, to deeply evaluate the carbon emission control potential of ultra-high performance concrete (UHPC). In the raw material stage, the experiment shows that replacing cement with 30% industrial waste can reduce the carbon emission of raw material production by 20%, and the simulation results are highly consistent with it. In the production process, the process is optimized by computational fluid dynamics simulation, and the new mixing equipment and precise maintenance system are adopted, which reduces the carbon emission per unit product by 12%. In the transportation stage, the experiment measured that the reasonable planning of routes and the selection of electric transportation tools can reduce the carbon emission per kilometer of transportation by 15%. In the use stage, the simulation model constructed based on the durability experiment shows that compared with ordinary concrete, the maintenance-related carbon emission of UHPC is reduced by 35% during the 50-year service life. In the demolition and recycling stage, the experiment and discrete element model simulation show that the carbon emission of the demolition process is reduced by 25% when 60% of the aggregate is recycled and reused. The case study combined experimental and simulation data, implemented raw material optimization, production process improvement and full life cycle management strategies, and reduced the overall carbon emissions of UHPC in actual projects by 30% - 40%.