Fire behavior of hemp blocks: A biomass-based construction material

Shewalul, Yohannes Werkina; Quiroz, Natalia Flores; Streicher, Dirk; Walls, Richard

doi:10.1016/j.jobe.2023.108147

Cited by 3 publications

(1 citation statement)

References 39 publications

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“…Additionally, these authors conducted another study with hemp fibers in gypsum composites subject to high temperatures, confirming the beneficial effect of these additions in increasing the toughness of gypsum prefabricated elements and preventing brittle collapse [36]. Several studies have highlighted the advantages of adding hemp material to improve the fire behavior of prefabricated blocks [37], emphasizing the effective integration between the additions of this plant-based compound and the gypsum composite matrix [38].…”

Section: Referencementioning

confidence: 73%

Development and Characterization of Innovative Hemp–Gypsum Composites for Application in the Building Industry

Ferrández,

Álvarez,

Zaragoza-Benzal

et al. 2024

Applied Sciences

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At present, the development of new eco-friendly building materials for the production of lightweight partitions has become a challenge in order to advance towards the industrialization of the building sector. This work aims to design, characterize, and analyze the possibilities of applying innovative ecological gypsum composites lightened with hemp. To achieve this, samples have been prepared with partial replacement of 15% and 30% in volume of the original gypsum material by adding hemp both in the form of powder and fiber. The results show how the replacement of 15% of gypsum by hemp fiber with a length between 8 and 12 mm improves the flexural strength of the composites. Likewise, all the dosages prepared for this study have met the minimum requirements for mechanical strength required by current regulations, while also improving the water resistance behavior of gypsum composites. However, the main advantage derived from the use of these hemp-lightened gypsum-based materials lies in their reduced thermal conductivity, being up to 50% lower than that obtained for traditional materials. These results suggest the possible application of these materials to produce prefabricated boards and panels for a more sustainable construction.

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Section: Referencementioning

confidence: 73%

Development and Characterization of Innovative Hemp–Gypsum Composites for Application in the Building Industry

Ferrández,

Álvarez,

Zaragoza-Benzal

et al. 2024

Applied Sciences

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Thermal Analysis and Fire Property Quantification of Crumb Rubber and Plastic Eco‐Aggregates for Sustainable Construction

Shewalul,

Flores Quiroz,

Walls

2024

Fire and Materials

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With a drive for sustainable construction, various products are being introduced to promote recycling, but often their properties relation to behaviour in fire are not known. In this paper, the fire performance of crumb rubber and a plastic eco‐aggregate, called RESIN8, were assessed. Various tests, including cone calorimeter, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC), were conducted. These are supplemented by numerical calculations and the Coats–Redfern kinetic model to quantify the thermal and fire properties of these materials. Cone calorimeter tests were conducted at 35 and 50 kW m−2, while the critical heat flux (CHF) values were determined using a range of irradiance levels. Time to ignition (TTI), heat release rate (HRR), peak heat release rate (pHRR), and thermal fire hazard parameters were quantified. Both materials were classified under the high thermal fire hazard class. The peak thermal decomposition rates occurred at 365°C (single peak) for CR and at 435°C and 550°C (two peaks) for RESIN8. The calculated activation energy values were 66.7 kJ mol−1 for crumb rubber and 55.1 and 43.9 kJ mol−1 for RESIN8 in the first and second stages, respectively. These eco‐aggregates could pose a significant thermal fire hazard, in the recycling facility during and after the recycling process, as well as when stored in bulk and when incorporated in large quantities in construction systems. Further investigation is crucial for understanding the effect of incorporating these eco‐aggregates within masonry and concrete systems from a fire safety perspective.

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Thermal insulation performance of composite materials using industrial hemp straws

Qingfeng,

Hong,

Mingdong

et al. 2024

Heat Mass Transfer

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Fire behavior of hemp blocks: A biomass-based construction material

Cited by 3 publications

References 39 publications

Development and Characterization of Innovative Hemp–Gypsum Composites for Application in the Building Industry

Development and Characterization of Innovative Hemp–Gypsum Composites for Application in the Building Industry

Thermal Analysis and Fire Property Quantification of Crumb Rubber and Plastic Eco‐Aggregates for Sustainable Construction

Thermal insulation performance of composite materials using industrial hemp straws

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