Valorization of Jute Powder in Mortars: Homogeneity and Mechanical Performance

Abstract

Jute fiber powder (0.25% to 2% of cement weight, with a 0.25% increment) was evaluated for reinforcing cement mortars. The addition of jute powder maintains a constant flow diameter of 180 mm, ensuring good workability and homogeneity. This behavior was attributed to the fine particle size and low dosage of the jute powder, which limited its effect on water demand and rheological behavior of the mortar, despite a slight setting delay proportional to the dosage. The low dosage of the jute powder limited its effect on water demand and rheological behavior of the mortar. The incorporation of fibers enhanced internal heat retention, with the material temperature increasing from 44.5 to 45.8 °C as fiber content increased. Although capillary water absorption slightly increased (up to 6.47%), the mortars maintained good compactness and remained within R1 to R3 classes according to NF EN 998-1 (2016). In the hardened state, jute powder improved tensile strength at an optimal dosage of 0.5%, while a progressive decrease in compressive strength was observed, related to changes in the cementitious microstructure. The dosage of 0.5% appeared to be optimal, offering a good balance between mechanical and thermal performance while preserving workability and durability.