Proportioning with Ground Limestone and Mineral Filler-Fine Limestone Additions to Improve the Performance of (High Volume Fly Ash) Concretes (recorded presentation)

Fine Limestone Additions to Improve the Performance of (High Volume Fly Ash) Concretes (recorded presentation)

Video Transcription

Video Summary

The presentation discussed strategies to improve the performance of concrete by incorporating fine limestone additions, with a focus on sustainability and reducing cement usage. The speaker highlighted various methods to replace cement content, such as optimizing aggregate gradation and using supplementary cementitious materials (SEMs) like fly ash and limestone. With fine limestone additions, significant cement reductions of 40-60% can be achieved without sacrificing the concrete's performance. The incorporation of fine limestone not only accelerates early hydration but also improves overall strength and reduces setting times, particularly beneficial in cold weather conditions. The discussion also touched on the synergistic effects of limestone with Class C or Class F fly ash and its impacts on hydration and resistance to chloride permeability. Cost considerations and regional material availability were emphasized as important factors in successfully implementing these sustainable concrete solutions. Overall, the integration of limestone can lead to economically and environmentally beneficial concrete formulations.

Keywords

sustainable concrete

fine limestone

cement reduction

supplementary cementitious materials

hydration improvement

chloride permeability