Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction

Martin P. Ansell; Michael Lawrence; Yunhong Jiang; Andy Shea; Atif Hussain; Juliana Calabria-holley; Pete Walker

doi:10.1016/B978-0-08-102704-2.00010-X

Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction

Martin P. Ansell, Michael Lawrence, Yunhong Jiang, Andy Shea, Atif Hussain, Juliana Calabria-holley, Pete Walker

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

14 Citations (Scopus)

Abstract

This chapter considers natural plant-based aggregates and bio-composite panels which have been developed for sustainable construction with low thermal conductivity and high hygrothermal efficiency. The cellulosic materials include hemp, flax and rape shiv, straw, corn cob residues together with hemp and flax fibers. All of these materials possess low embodied energy and low embodied carbon compared to conventional materials of construction. The combination of the cellulosic materials with natural matrix materials results in exceptionally low thermal conductivity and high hygrothermal efficiency compared to conventional materials of construction as a result of their microporosity and breathability.

The physical characteristics of natural plant-based aggregates are assessed in terms of their pore size distribution, density and microstructure. Measurements of the thermal conductivity of bio-composite panels are described which confirm their highly insulating properties. Hygroscopic testing demonstrates their effectiveness in absorbing and releasing moisture. The thermal and hygroscopic performance of bio-composite panels in test cells is reported together with their application in construction.

Original language	English
Title of host publication	Nonconventional and Vernacular Construction Materials
Subtitle of host publication	Characterisation, Properties and Applications
Editors	Kent A. Harries, Bhavna Sharma
Place of Publication	Duxford, UK
Publisher	Elsevier
Chapter	10
Pages	217-245
Number of pages	29
Edition	2nd
ISBN (Print)	9780081027042
DOIs	https://doi.org/10.1016/B978-0-08-102704-2.00010-X
Publication status	Published - 2020
Externally published	Yes

Keywords

Selection of bio-materials
Natural plant-based aggregates
Microstructure
Porosity
Bulk density
Moisture buffer value
Thermal conductivity
Vapor permeability
Bio-composite panels
Performance in test cells
Applications in construction

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10.1016/B978-0-08-102704-2.00010-X

https://linkinghub.elsevier.com/retrieve/pii/B978008102704200010X

Cite this

Ansell, M. P., Lawrence, M., Jiang, Y., Shea, A., Hussain, A., Calabria-holley, J., & Walker, P. (2020). Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction. In K. A. Harries, & B. Sharma (Eds.), Nonconventional and Vernacular Construction Materials: Characterisation, Properties and Applications (2nd ed., pp. 217-245). Elsevier. https://doi.org/10.1016/B978-0-08-102704-2.00010-X

Ansell, Martin P. ; Lawrence, Michael ; Jiang, Yunhong et al. / Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction. Nonconventional and Vernacular Construction Materials: Characterisation, Properties and Applications. editor / Kent A. Harries ; Bhavna Sharma. 2nd. ed. Duxford, UK : Elsevier, 2020. pp. 217-245

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abstract = "This chapter considers natural plant-based aggregates and bio-composite panels which have been developed for sustainable construction with low thermal conductivity and high hygrothermal efficiency. The cellulosic materials include hemp, flax and rape shiv, straw, corn cob residues together with hemp and flax fibers. All of these materials possess low embodied energy and low embodied carbon compared to conventional materials of construction. The combination of the cellulosic materials with natural matrix materials results in exceptionally low thermal conductivity and high hygrothermal efficiency compared to conventional materials of construction as a result of their microporosity and breathability.The physical characteristics of natural plant-based aggregates are assessed in terms of their pore size distribution, density and microstructure. Measurements of the thermal conductivity of bio-composite panels are described which confirm their highly insulating properties. Hygroscopic testing demonstrates their effectiveness in absorbing and releasing moisture. The thermal and hygroscopic performance of bio-composite panels in test cells is reported together with their application in construction.",

keywords = "Selection of bio-materials, Natural plant-based aggregates, Microstructure, Porosity, Bulk density, Moisture buffer value, Thermal conductivity, Vapor permeability, Bio-composite panels, Performance in test cells, Applications in construction",

author = "Ansell, {Martin P.} and Michael Lawrence and Yunhong Jiang and Andy Shea and Atif Hussain and Juliana Calabria-holley and Pete Walker",

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doi = "10.1016/B978-0-08-102704-2.00010-X",

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Ansell, MP, Lawrence, M, Jiang, Y, Shea, A, Hussain, A, Calabria-holley, J & Walker, P 2020, Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction. in KA Harries & B Sharma (eds), Nonconventional and Vernacular Construction Materials: Characterisation, Properties and Applications. 2nd edn, Elsevier, Duxford, UK, pp. 217-245. https://doi.org/10.1016/B978-0-08-102704-2.00010-X

Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction. / Ansell, Martin P.; Lawrence, Michael; Jiang, Yunhong et al.
Nonconventional and Vernacular Construction Materials: Characterisation, Properties and Applications. ed. / Kent A. Harries; Bhavna Sharma. 2nd. ed. Duxford, UK: Elsevier, 2020. p. 217-245.

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

TY - CHAP

T1 - Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction

AU - Ansell, Martin P.

AU - Lawrence, Michael

AU - Jiang, Yunhong

AU - Shea, Andy

AU - Hussain, Atif

AU - Calabria-holley, Juliana

AU - Walker, Pete

PY - 2020

Y1 - 2020

N2 - This chapter considers natural plant-based aggregates and bio-composite panels which have been developed for sustainable construction with low thermal conductivity and high hygrothermal efficiency. The cellulosic materials include hemp, flax and rape shiv, straw, corn cob residues together with hemp and flax fibers. All of these materials possess low embodied energy and low embodied carbon compared to conventional materials of construction. The combination of the cellulosic materials with natural matrix materials results in exceptionally low thermal conductivity and high hygrothermal efficiency compared to conventional materials of construction as a result of their microporosity and breathability.The physical characteristics of natural plant-based aggregates are assessed in terms of their pore size distribution, density and microstructure. Measurements of the thermal conductivity of bio-composite panels are described which confirm their highly insulating properties. Hygroscopic testing demonstrates their effectiveness in absorbing and releasing moisture. The thermal and hygroscopic performance of bio-composite panels in test cells is reported together with their application in construction.

AB - This chapter considers natural plant-based aggregates and bio-composite panels which have been developed for sustainable construction with low thermal conductivity and high hygrothermal efficiency. The cellulosic materials include hemp, flax and rape shiv, straw, corn cob residues together with hemp and flax fibers. All of these materials possess low embodied energy and low embodied carbon compared to conventional materials of construction. The combination of the cellulosic materials with natural matrix materials results in exceptionally low thermal conductivity and high hygrothermal efficiency compared to conventional materials of construction as a result of their microporosity and breathability.The physical characteristics of natural plant-based aggregates are assessed in terms of their pore size distribution, density and microstructure. Measurements of the thermal conductivity of bio-composite panels are described which confirm their highly insulating properties. Hygroscopic testing demonstrates their effectiveness in absorbing and releasing moisture. The thermal and hygroscopic performance of bio-composite panels in test cells is reported together with their application in construction.

KW - Selection of bio-materials

KW - Natural plant-based aggregates

KW - Microstructure

KW - Porosity

KW - Bulk density

KW - Moisture buffer value

KW - Thermal conductivity

KW - Vapor permeability

KW - Bio-composite panels

KW - Performance in test cells

KW - Applications in construction

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U2 - 10.1016/B978-0-08-102704-2.00010-X

DO - 10.1016/B978-0-08-102704-2.00010-X

M3 - Chapter

SN - 9780081027042

SP - 217

EP - 245

BT - Nonconventional and Vernacular Construction Materials

A2 - Harries, Kent A.

A2 - Sharma, Bhavna

PB - Elsevier

CY - Duxford, UK

ER -

Ansell MP, Lawrence M, Jiang Y, Shea A, Hussain A, Calabria-holley J et al. Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction. In Harries KA, Sharma B, editors, Nonconventional and Vernacular Construction Materials: Characterisation, Properties and Applications. 2nd ed. Duxford, UK: Elsevier. 2020. p. 217-245 Epub 2020 Jan 24. doi: 10.1016/B978-0-08-102704-2.00010-X

Natural plant-based aggregates and bio-composite panels with low thermal conductivity and high hygrothermal efficiency for applications in construction

Abstract

Keywords

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