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.
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