Cellulose Nanofilaments (CNFs) for the Development of a Novel High-Performance Cementitious Matrix

PROJECT COST:

769 500 $

PRIMA CONTRIBUTION:

307 793 $

PROJECT DETAILS:

Kruger currently produces cellulose nanofilaments (CNFs) from wood pulp at its pulp and paper mill in Trois-Rivières, Québec. These renewable nanomaterials possess a high aspect ratio (length-to-diameter ratio), a hydrophilic surface, and an exceptionally high elastic modulus. Owing to these unique characteristics, the incorporation of CNFs into concrete has the potential to enhance the microstructure of the cement matrix by increasing its density and improving its stiffness and mechanical performance.

This three-year project aims to develop high-strength concrete (HSC) reinforced with CNFs for advanced construction applications. Due to their nanometric dimensions and hydrophilic nature, CNFs are highly compatible with the aqueous environment of fresh cementitious mixtures. They can function as viscosity-modifying agents, improving the rheological behavior of fresh concrete while promoting a denser and more homogeneous cement matrix.

The project will systematically investigate and optimize the rheological, mechanical, and durability properties of CNF-reinforced HSC. Particular emphasis will be placed on understanding the influence of CNFs on fresh-state workability, strength development, and long-term durability. In addition, technology transfer activities will support the scale-up of CNF-reinforced HSC production to a 500 L pilot scale, followed by full-scale field trials to assess the material’s in-service performance, durability, and long-term reliability under real operating conditions.