Influence of hemp waste incorporation on the mechanical and thermal properties of cementitious
ZKG INTERNATIONAL, cilt.79, sa.3, ss.80-88, 2026 (SCI-Expanded)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 79 Sayı: 3
- Basım Tarihi: 2026
- Doi Numarası: 10.32604/zkg.2026.077596
- Dergi Adı: ZKG INTERNATIONAL
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), ICONDA Bibliographic, The International Construction Database (ICONDA)
- Sayfa Sayıları: ss.80-88
- Bursa Uludağ Üniversitesi Adresli: Evet
Özet
In this study, the effect of industrial hemp waste incorporation on cement-based mortar performance was investigated. Three forms of hemp fibers were examined: raw fibers (6 mm in length), ground fibers, and powder passing through a 2 mm sieve. These were incorporated as a partial aggregate replacement at 0.5% volumetric ratio. All mixtures were produced with a constant water-to-cement ratio of 0.52, while a polycarboxylate ether-based high-range water-reducing admixture was used to achieve the target flow value of 180 +/- 10 mm. The addition of hemp fibers adversely affected the flow performance of the mixtures, primarily due to the high water absorption capacity of the fibers, which reduced the amount of free water available in the system. It has been observed that fiber reinforcement improves the thermal conductivity performance of the mixture. Compressive and flexural strengths showed substantial reductions with fiber incorporation, particularly compressive strength. This strength reduction was associated with increased void volume from fiber agglomeration in the matrix. The ground hemp fiber (HG) mixture demonstrated the highest water absorption, while the Control mixture showed the lowest. These observations indicate that fiber incorporation may reduce mechanical performance, mainly due to the formation of voids that increase the overall porosity of the matrix. The developed void structure also hindered ultrasonic wave transmission, reducing UPV values. This study demonstrates the potential of hemp waste as a sustainable material for enhancing the thermal performance of building materials. However, fiber surface modification and mixture optimization are necessary to address strength reductions. The findings support the development of sustainable, environmentally friendly building materials.