Title:
Relation between Strength and Yield Stress in Fiber- Reinforced Mortar
Author(s):
Ronan Chometon, Maxime Liard, Pascal Hebraud, and Didier Lootens
Publication:
Materials Journal
Volume:
121
Issue:
2
Appears on pages(s):
105-114
Keywords:
critical volume fraction; fiber-reinforced mortar; flexural strength; master curves; mortar; rheology
DOI:
10.14359/51740371
Date:
4/1/2024
Abstract:
The need to constantly improve the quality and properties of manufactured
products leads to the development of hybrid materials
that combine different elements, complementing one another.
Fiber-reinforced mortar is one of those products, as the fibers
are used to improve cementitious materials’ flexural weakness.
Experimental data on different metallic fibers dispersed in mortar
demonstrate the correlation between early-age rheological properties
and long-term mechanical strength. Both quantities depend
on the ratio of the solid volume fraction of the fiber to a critical
solid volume fraction characteristic of the form factors of the fiber.
It is demonstrated that both effects arise from the packing stress
of the fibers in the mortar when their concentrations are close to
their maximum packing fraction. Geometrical arguments are used
to explain how this critical volume fraction is related to the fiber
form factor. Then, it enables the building of master curves using
geometrical arguments.