Bio-Based Miscanthus-Enriched Concrete
Assessing Properties and Feasibility
Shivanshi S Shivanshi (TU Delft - Civil Engineering & Geosciences)
H.M. Jonkers – Mentor (TU Delft - Civil Engineering & Geosciences)
Yasmine Mosleh – Graduation committee member (TU Delft - Civil Engineering & Geosciences)
J. Xie – Graduation committee member (TU Delft - Civil Engineering & Geosciences)
Jaap Schotanus – Graduation committee member (BioBound)
Gert van Oort – Graduation committee member (BioBound)
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Abstract
This thesis investigates the mechanical and environmental feasibility of incorporating Miscanthus x giganteus fibres into cementitious composites, from fibre to concrete scale. Alkaline delignification significantly increased fibre tensile strength (13.2 to 109 MPa), while untreated, water-immersed fibres improved paste flexural and tensile strength through crack-bridging, despite reducing compressive strength. At 15% fibre volume, concrete with recycled aggregates showed reduced compressive and tensile strength but a 1.7-times lower environmental footprint than reference mixes. These findings reveal a trade-off between mechanical performance and sustainability, positioning fibre pre-treatment as a promising pathway to enhance mechanical properties without compromising the environmental benefits of bio-based concrete.