Study of a hempcrete wall exposed to outdoor climate: Effects of the coating

Piot, Amandine; Béjat, Timea; Jay, Arnaud; Bessette, L.; Wurtz, Étienne; Barnes-Davin, Laury

doi:10.1016/j.conbuildmat.2016.12.143

Cited by 37 publications

(20 citation statements)

References 13 publications

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“…Minguela [61] observed that the thermal conductivity of earth blocks had been largely reduced after the addition of fine hemp shiv. Piot et al [8] reported that using a water-absorbing exterior coating or plaster increases the thermal conductivity of the hempcrete wall. Another risk of using a water-absorbent coating is the growth of mold just below the coating.…”

Section: Hygric Property and Heat Conductivitymentioning

confidence: 99%

“…On a global priority scale, efforts to mitigate the impacts of climate change have focused on reducing greenhouse gas emissions within the framework of the Kyoto Protocol and Paris Agreement [7]. Therefore, it has become increasingly important to consider the life cycle analysis and the total environmental impact of the construction materials in the design of environment-friendly buildings [8]. Environmental concerns about conservation of natural resources and sustainability have been a significant source of motivation for researchers to work on environment-friendly composite materials which contribute low environmental impact, long-term community benefits as well as profitability [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Physical and Mechanical Properties of Hempcrete

Demir¹,

Doğan²

2020

TOWMJ

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Background: Environment-friendly materials attract attention whilst the construction sector causes excessive global energy consumption and emission of greenhouse gas. Renewable plant-based biomaterials, which have a low environmental impact, are very beneficial in order to prevent environmental pollution and to preserve natural resources. Hempcrete provides environment-friendly construction materials as well as thermal and hygroscopic properties. Objective: This paper presents a review of hempcrete research about understanding the environmental effects and construction methods of hempcrete; moreover, the benefits and innovations it has provided throughout its life cycle, have been investigated. Methods: For this purpose, experimental studies of hempcrete were compared to each other in all aspects in order to determine density, thermal conductivity, vapor permeability, hygrometric behavior, durability, acoustic absorption, mechanical properties and life cycle analysis. Moreover, binder characteristics, hemp shiv proportions, water content, curing conditions and results have been focused on to explain the benefits of hempcrete. Results: The results obtained show that hempcrete has high porosity and vapor permeability, medium-low density, low thermal conductivity, Young’s modulus and compressive strength. Conclusion: Based upon the findings of the studies reviewed, hempcrete is an advantageous material in buildings with its extraordinary thermal and hygrometric behaviour. Hemp is also an eco-friendly and economical plant-based raw material for the construction industry.

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Section: Hygric Property and Heat Conductivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Properties of Hempcrete

Demir¹,

Doğan²

2020

TOWMJ

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“…Hemp lime composite owes its excellent thermal conductivity properties to high hemp shiv porosity [16]. Its properties attract even more people both in this country and abroad to launch investigations and promote hemp-lime composite applications in the construction of new or improving thermal insulation performance of the existing buildings [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

The Heat Conductivity Properties of Hemp–Lime Composite Material Used in Single-Family Buildings

et al. 2020

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The main goal of the paper is to calculate the heat conductivity for three experimental hemp–lime composites used for structural construction purposes with the use of the experimental stand inside two compartments. Due to current construction trends, we are constantly searching for eco-friendly materials that have a low carbon footprint. This is the case of the analyzed material, and additional thermographic heat distribution inside the material during a fire resistance test proves that it is also a perfect insulation material, which could be applied in addition of popular isolating materials. This paper presents the results of certain hemp–lime composite studies and the potential for using hemp–lime composite for the structural construction industry. Hemp–lime composite heat transfer coefficient, fire resistance, and bulk density properties are compared to those of other commonly used construction materials. The obtained results show that the material together with supporting beams made of other biodegradable materials can be the perfect alternative for other commonly used construction materials.

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“…The behavior of this material in different climatic conditions and its properties have been considered in numerous studies [8]. Different characteristics of hemp as a building material, including its thermal characteristics as well as the properties of hempcrete with several binders have been investigated [9,10].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Thermal Parameters of Hemp Fiber Insulation

et al. 2020

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Nowadays, sustainable construction is a key factor for reaching net-zero emissions of carbon dioxide all over the world. This goal is impossible to achieve by merely reducing the energy consumption of end-users. A more holistic approach should be taken, adopting sustainable industrial practices that use environmentally friendly materials on a large scale. This paper presents the analysis of the hydrothermal properties of hemp thermal insulation plates. We carried out extensive measurements and the analysis of the thermal conductivity coefficient, drying-out dynamics, and water absorption. The study was performed with experimental insulation samples based on the fiber obtained from hemp stems, prepared using different adhesive powders. The dimensions of the analyzed samples were 300 × 300 mm. The proposed samples are not yet available in mass production. Hemp does not flower in the Baltic region and was traditionally used for soil regeneration. Thus, using this raw material increases the added value of agricultural residues. Three series of hemp fiber samples with different substances and pressing modes were evaluated in the study. Each set of samples consisted of four plates with varying thicknesses and two different densities: 200 kg/m3 and 300 kg/m3. All samples exhibited a significant increase in moisture absorption and a strong correlation with the increase in thermal conductivity. The average thermal conductivity of the test samples ranged from 0.0544 to 0.0594 W/mK. The impact of the adhesive powder on the thermal conductivity was found to be extremely small. However, the values obtained were much higher than those for traditional thermal insulation materials, allowing to utilize the local agriculture residues and providing material for the construction of eco-friendly buildings.

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Study of a hempcrete wall exposed to outdoor climate: Effects of the coating

Cited by 37 publications

References 13 publications

Physical and Mechanical Properties of Hempcrete

Physical and Mechanical Properties of Hempcrete

The Heat Conductivity Properties of Hemp–Lime Composite Material Used in Single-Family Buildings

Analysis of Thermal Parameters of Hemp Fiber Insulation

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