Title: High Initial Strength Low Clinker Ternary Binders for Walls with Integrated Formwork

Author(s): Lucas Mosser, Eric Garcia Diaz, Patrick Rougeau, and François Jacquemot

Publication: Symposium Paper

Volume: 362

Issue:

Appears on pages(s): 651-670

Keywords: clinker, durability, LCA, limestone, low carbon footprint, metakaolin, strength, workability

DOI: 10.14359/51741019

Date: 6/14/2024

Abstract:
The development of low carbon footprint and high initial compressive strength binders for the precast industry is presented. Binders with a substitution of up to 75% of a normal Portland cement (CEM I) with a mixture of metakaolin and two different limestone additions were developed on mortars. Water/binder ratio reduction (down to 0.25) and thermal treatment (up to 50°C) have been applied to improve initial compressive strength (> 14 MPa at 8 hours). Pozzolanic reaction improved 28 days compressive strength (> 50 MPa). The most technically and environmentally performant binders have been applied to concrete. Concretes with low clinker contents have been produced to achieve the C25/C30 and C40/50 strength classes. Durability performances corresponding to XC4 were assessed via a performance approach (FD P 18-480). A wall with integrated formwork has been industrially manufactured which allowed a carbon footprint reduction of around 30% over its whole life cycle.