Combined in situ and in silico validation of a material model for hempcrete

Birjukovs, Mihails; Šinka, Māris; Jakovičs, Andris; Bajāre, Diāna

doi:10.1016/j.conbuildmat.2021.126051

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…This research highlighted the effectiveness of hemp concrete as insulation in timber-frame structures, emphasizing its role in lowering energy consumption and its compliance with energy efficiency and environmental standards. Analyses under static conditions and during typical summer and winter days have considered hemp concrete as a promising material [42], and these results are supported by other recent studies [27,[41][42][43][44][45], acknowledging its revolution-ary impact in the construction sector. This material therefore represents a solution for the renovation of old buildings as well as for new constructions.…”

Section: Introductionsupporting

confidence: 64%

Hygrothermal Performance of the Hemp Concrete Building Envelope

Kaboré,

Maref,

Ouellet-Plamondon

2024

Energies

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The search for environmentally friendly and low-carbon-footprint construction materials continues progressively. Researchers are now interested in innovative materials that connect with the principles of sustainable construction, and materials such as hemp concrete prove to be promising. This article presents the results of a study that aimed to evaluate the hygrothermal performance of hemp concrete integrated into the building envelope using the hygrothermal tool WUFI Pro 6.2. The simulation model was compared and verified with existing models before its utilization for this study. The results of this verification were in good agreement, which gave us more confidence in its application for further parametric studies of building envelopes in hot climate zones. Three wall systems were simulated: (i) a wall system with hemp concrete, (ii) a compressed earth block wall, and (iii) a cement block wall. The most important variables used in the simulations were the hygrothermal properties of the materials or wall components and the incident solar radiation. The simulation results showed that hemp concrete has good thermal performance and temperature and humidity regulation capabilities of the building envelope. The interior surface temperatures of the hemp concrete walls were between 22.1 °C and 24.6 °C compared to the compressed earth block and cement block walls, where the surface temperatures were between 22.0 °C and 27 °C and between 21.2 °C and 28.7 °C, respectively, and between 23 °C and 45 °C for the exterior temperatures. These values remain the same with the increase in exterior temperatures for hemp concrete walls. In conclusion, hemp concrete could be a great alternative material for use in construction for hot climate zones.

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Section: Introductionsupporting

confidence: 64%

Hygrothermal Performance of the Hemp Concrete Building Envelope

Kaboré,

Maref,

Ouellet-Plamondon

2024

Energies

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“…Hemp-based construction materials, such as hempcrete, have gained popularity as ecofriendly alternatives in the building industry [68]. In several studies, hempcrete performed well as a building material, replacing traditional construction materials while adhering to the thermal, insulating, and acoustic characteristics required in construction [69][70][71][72][73].…”

Section: Industrial Versatility Of Hempmentioning

confidence: 99%

Opportunities, Challenges, and Scientific Progress in Hemp Crops

Kaminski,

Hoeng,

Goffman

et al. 2024

Molecules

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The resurgence of cannabis (Cannabis sativa L.) has been propelled by changes in the legal framework governing its cultivation and use, increased demand for hemp-derived products, and studies recognizing the industrial and health benefits of hemp. This has led to the creation of novel high-cannabidiol, low-Δ9-tetrahydrocannabinol varieties, enabling hemp crop expansion worldwide. This review elucidates the recent implications for hemp cultivation in Europe, with a focus on the legislative impacts on the cultivation practices, prospective breeding efforts, and dynamic scientific landscape surrounding this crop. We also review the current cultivars’ cannabinoid composition of the European hemp market and its major differences with that of the United States.

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“…The hygrothermal properties of hempcrete provide both indoor comfort and good thermal performance, which is also important in assessing the sustainability of the material. Hemp concrete offers low thermal conductivity from 0.06 to 0.13 W/(m•K), high vapour permeability ~ 10-11 -10-10 kg/(m•s•Pa) and good moisture buffering with moisture buffering value (MBV) > 2 [11].…”

Section: Introductionmentioning

confidence: 99%

Hempcrete – CO₂ Neutral Wall Solutions for 3D Printing

Šinka

Spurina

Korjakins

et al. 2022

Environmental and Climate Technologies

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Hempcrete is a bio-based self-bearing envelope and thermal insulation building material that is becoming more popular nowadays and has a low environmental impact, especially CO2 emissions. This study looks for solutions for hempcrete printing using a custom-built gantry type 3D printer typically used for concrete 3D printing. Preliminary research shows that hempcrete can be printed at a relatively low density of 660 kg/m3 and achieve an adequate buildability and compressive strength for printing individual wall elements. At this density, hempcrete has a thermal conductivity of 0.133 W/(m·K), unable to provide the adequate thermal resistance at average wall thickness, so high-density hempcrete should be printed as an outer wall shell (similar to Contour Crafting) and the middle filled with lower density thermal insulation hempcrete. By calculating the CO2 emissions of such printed 400–620 mm thick walls, it was found that they absorb from 1.21 to 16.7 kg of CO2 per m2, thus, such material could reduce the negative environmental impact of the construction industry while improving its productivity through 3D printing.

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Combined in situ and in silico validation of a material model for hempcrete

Cited by 8 publications

References 29 publications

Hygrothermal Performance of the Hemp Concrete Building Envelope

Hygrothermal Performance of the Hemp Concrete Building Envelope

Opportunities, Challenges, and Scientific Progress in Hemp Crops

Hempcrete – CO₂ Neutral Wall Solutions for 3D Printing

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Combined in situ and in silico validation of a material model for hempcrete

Cited by 8 publications

References 29 publications

Hygrothermal Performance of the Hemp Concrete Building Envelope

Hygrothermal Performance of the Hemp Concrete Building Envelope

Opportunities, Challenges, and Scientific Progress in Hemp Crops

Hempcrete – CO2 Neutral Wall Solutions for 3D Printing

Contact Info

Product

Resources

About

Hempcrete – CO₂ Neutral Wall Solutions for 3D Printing