Title: The Key Role of Limestone Calcined Clay Cements on the Roadmap towards Eco-Efficient Cement and Concrete

Author(s): Franco Zunino and Karen L. Scrivener

Publication: Symposium Paper

Volume: 361

Issue:

Appears on pages(s): 31-42

Keywords: blended cements; metakaolin; durability; limestone calcined clay cement

DOI: 10.14359/51740605

Date: 3/1/2024

Abstract:
Concrete is the substance most consumed by humanity after water. Blended cements in which part of the energy intensive clinker is replaced by supplementary cementitious materials (SCMs) are the by far the most realistic means to obtain large scale CO2 reductions in the short-to-midterm, attending the urgency of the climate emergency. LC3, blended cement produced by the combination of limestone, calcined clays and Portland cement provides a solution that achieves equivalent mechanical performance to OPC, better durability against chloride penetration and ASR and a reduction of CO2 emissions by about 40%. Due to the similarities of LC3 with OPC, it is a material that can be adopted today using the same construction equipment and workforce worldwide.