Hemp-clay building materials - An investigation on acoustic, thermal and mechanical properties

Fernea, Raluca; Manea, Daniela Lucia; Tămaș-Gavrea, Daniela Roxana; Roşca, Ioan

doi:10.1016/j.promfg.2019.02.205

Cited by 18 publications

(9 citation statements)

References 7 publications

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“…It is also observed that the selected papers rarely mentioned other important properties such as thermal, acoustic and fire resistance of the earth blocks. Since these building material properties are related to human comfort and safety, it may be useful to implement the evaluation of these features in the manufacture of waste-integrated earth building materials [58,76,110]. The test results varied according to the types of waste materials (fibre, powder, pellet, polymer etc.…”

Section: Discussionmentioning

confidence: 99%

“…Fernea et al [76] conducted experimental research on the properties of clay building material using hemp and clay binder in a ratio of 1: 1, 2: 1 and 3: 1. From the tests, it was observed that the sample with 1:2 ratio reached the highest density above 1000kg/m 3 .…”

Section: Bottom Ashmentioning

confidence: 99%

“…6 illustrates that only three waste materials (glass fibre reinforced polymer waste, KS770 and soda ash) did not fulfil the minimum requirements of the standards IS 1725 and SLS (1750kg/m 3 ). [61], GB/T 17671-1999 [114], JC/T945-2005 [140], Japanese Standard: JIS A1216 [71] New Zealand Earth Building Standard: NZS 4298 (NZS 1998) [62][73] Flexural and Tensile strength test American Standard: ASTM C 67-07 [69], ASTM C1018 [110], ASTM C 1609 [66], ASTM D 1635-00 [91], ASTM C 496 [89], ASTM D 3967-08-16 [ [116], Chinese Standard: GB/T 50082-2009 [114] Thermal conductivity test American Standard: ASTM C 1113-99 [55], ASTM C518-91, ASTM C1132-89 [119] European Standard: BS EN 1745 [119], SR EN 12667:2002 [76], French Standard: AFNOR: XP P13-901 [63] Japanese Standard: JIS R 2618 [64]…”

Section: Effects Of Non-agro Wastes On the Density Of Unfired Earth Blocksmentioning

confidence: 99%

“…11). Different apparatus was used to measure the conductivity value such as QTM-500 quick thermal conductivity meter [55], EP500 guarded hot plate apparatus [74], TR-1 probe [63] and Fox 200 device with the thermoflux meter [76]. Huynh et al [79], Oti et al [119] and Bogas et al [132] presented that density, void volume and thermal conductivity were correlated.…”

Section: Effects Of Waste Materials On the Thermal Properties Of Unfired Earth Blocksmentioning

confidence: 99%

See 3 more Smart Citations

Application of agro and non-agro waste materials for unfired earth blocks construction: A review

Jannat

Hussien

Abdullah

et al. 2020

Construction and Building Materials

107

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The production process of conventional building materials consumes a high amount of energy which has a negative impact on the environment. The use of locally available materials and upgradation of traditional techniques can be a good option for sustainable development. Consequently, earth has attracted the attention of the researchers as a building construction material for its availability and lower environmental impact. On the other hand, in developing countries waste disposal from the agricultural and industrial sectors raises another serious concern. The scientists have introduced such waste additives into the earth matrix to improve its performance. Therefore, the present paper reviews the state-of-the-art of research on the effects of these various agro and non-agro wastes in the production of unfired earth blocks. This study is divided into three sections: The first section outlines the different types of waste materials and earth blocks considered in the selected papers. The second part deals in depth with the test results of the different properties (density, water absorption, compressive strength, flexural strength and thermal conductivity) of unfired earth blocks containing waste materials. The last section analyses and compares the results with the current earth-building construction standards. The literature survey presents that the waste materials have a clear potential to partly replace earth by complying with certain requirements. Moreover, the application of such wastes for the development of building construction materials provides a solution that decreases energy usage as well as contributes to effective waste management. Future research on establishing guidelines and standards for the development and production of these sustainable unfired earth building materials is recommended.

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Section: Discussionmentioning

confidence: 99%

Section: Bottom Ashmentioning

confidence: 99%

Section: Effects Of Non-agro Wastes On the Density Of Unfired Earth Blocksmentioning

confidence: 99%

Section: Effects Of Waste Materials On the Thermal Properties Of Unfired Earth Blocksmentioning

confidence: 99%

See 2 more Smart Citations

Application of agro and non-agro waste materials for unfired earth blocks construction: A review

Jannat

Hussien

Abdullah

et al. 2020

Construction and Building Materials

107

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“…However, clay is not good thermal insulator. Several studies have added hemp shiv to clay composites to reduce the thermal conductivity [20,21]. The results of the experiments showed that hemp clay composites had a similar thermal conductivity to hemp concrete with the potential to use clay as an alternative to lime in order to reduce the environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Moisture buffer, fire resistance and insulation potential of novel bio-clay plaster

Jiang

Phelipot-Mardelé

Collet

et al. 2020

Construction and Building Materials

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The novel bio-clay plaster was formulated by adding hemp powder to clay plaster to improve the performance of buildings by moisture buffering the indoor climate, providing a fire insulation layer to encapsulate inflammable bio-based substrates and enhancing air tightness within the system by closing joints. The results showed the plaster formulation influences drying shrinkage, thermal conductivity, density and the moisture buffer value of the plaster. The thermal conductivity of the novel bio-clay plaster decreased with a decreasing proportion of Earthen Clay. The proportion of hemp powder had little effect on the thermal conductivity of the plaster, whereas the amount of hemp powder had a slightly effect on the moisture buffering property. The novel bio-clay plaster exhibited improved fire resistance. The detailed hygrothermal characterization using the measurement of moisture buffer value and thermal conductivity analysis indicated that the novel bio-clay plaster showed a good moisture buffering capability, even for small thicknesses, and low thermal conductivity, with the potential to develop industrially viable products.

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Verstärkter Lehm für niederfeste Bauteile: erste Untersuchungsergebnisse

Vaculik,

Cruz,

Rezaie

et al. 2023

ce papers

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KurzfassungDer weltweit steigende Rohstoffverbrauch führt zu steigenden CO2‐Emissionen, welche zu einem nicht unerheblichen Teil von der Zementindustrie verursacht werden. Eine vielversprechende Möglichkeit, um klimaneutral zu bauen, ist der Einsatz von Lehm als bewährten Baustoff, der für seine raumklimaregulierenden Eigenschaften und leichte Verarbeitbarkeit bekannt ist. Herausforderungen beim allgemeinen Lehmbau sind das starke Schwinden sowie der erforderliche Witterungsschutz. Die Endfestigkeiten sind im Allgemeinen für den Bausektor unzureichend. Ein vielversprechender Ansatz besteht darin, den Ton mit mineralischen Zusätzen zu stabilisieren, um die mechanischen Eigenschaften insgesamt zu verbessern.Erste Ergebnisse zeigen, dass die Verwendung von Portlandzement und calciniertem Ton als Bindemittel die Festigkeit des verstärkten Tonmörtels um min. 10 MPa erhöht. Gleichzeitig schneidet diese Methode in Bezug auf die Ökobilanz besser ab als die alleinige Verwendung von Zement zur Verstärkung von Ton. Unter Verwendung von 10 M.‐% Additiven konnte eine Druckfestigkeitssteigerung von bis zu 550 % erzielt werden. Auch das Schwindverhalten konnte minimiert und parallel dazu der Wasserwiderstand erhöht werden. Die Ergebnisse der hier durchgeführten Untersuchungen zeigen eine praktikable Alternative zu Normalbeton im Niedrigfestigkeitsbereich.

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Hemp-clay building materials - An investigation on acoustic, thermal and mechanical properties

Cited by 18 publications

References 7 publications

Application of agro and non-agro waste materials for unfired earth blocks construction: A review

Application of agro and non-agro waste materials for unfired earth blocks construction: A review

Moisture buffer, fire resistance and insulation potential of novel bio-clay plaster

Verstärkter Lehm für niederfeste Bauteile: erste Untersuchungsergebnisse

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