About the project
Shotcrete, also known as spray-applied concrete, is a widely used construction material in the tunnelling and mining sectors, with a long history of utilization s ince the 1930s. Its versatility is attributed to easy application, adherence to various shapes, and bonding on uneven surfaces. Shotcrete's credibility as a construction technique has been enhanced by the introduction of advanced technologies such as Suppl ementary Cementitious Materials
(SCMs), chemical admixtures, and fiber reinforcement. However, the significant
environmental impact of shotcrete, accounting for approximately 5% of global atmospheric
CO 2 emissions, has been addressed through various approa ches, including the use of low
carbon footprint SCMs, decreasing cement usage through water to cement ratio adjustments,
and optimizing shotcrete mix design for rebound and built up thickness.
This project is based on studying and analysing the utilization of Microfibrillated Cellulose
(MFC) as a bio additive in concrete due to its positive impact on properties such as rheology,
shear thinning behaviour, and viscosity. MFC has a potential for improving stiffness,
workability, and stability of concrete witho ut altering water to cement ratio. This research is
relevant for shotcrete designs as well. From a sustainability perspective, MFC can reduce the
use of cementitious material in mix design, leading to possible cost efficiency and lower
carbon footprint due to its bio based nature.
Project members
Farhan Khalique
About the client
Borregaard
Supervisor
Shima Pilehvar, Østfold University College
Dr. Harrison Gallantree Smith