Thermal performance of different construction materials used in New Zealand dwellings comparatively to international practice – A systematic literature review

Al-Radhi, Yazeed; Roy, Krishanu; Liang, Hao; Ghosh, Kushal Kanti; Clifton, G. Charles; Lim, James B.P.

doi:10.1016/j.jobe.2023.106346

Cited by 9 publications

(6 citation statements)

References 137 publications

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“…Although earth-based systems cannot be considered as insulating materials, their thermal conductivity, which varies from 0.17 to 1.10 W/m·K (as a function of density and mineralogical composition), is similar to other materials commonly used in the construction field, like lime (about from 0.3 to 0.8 W/m·K), cement (about from 0.4 to 1.4 W/m·K), and ceramic bricks (about from 0.4 to 1.5 W/m·K) [ 29 , 30 , 31 , 32 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 68%

Thermal Properties of Eco-Friendly Earthen Materials Stabilized with Bio-Based Polymers: Experimental Data and Modeling Procedure for Improving Mix-Design

Cappai,

Shoukat,

Pilia

et al. 2024

Materials

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The fight against climate change has delineated new objectives, among which one of the most crucial is the replacement of high-energy-intensity materials in the construction sector with more sustainable and thermally efficient alternatives to reduce indirect emissions. Consequently, the thermal properties of materials assume fundamental importance. In this regard, the large-scale use of earth represents a promising option, not only due to its widespread availability but especially for its minimal embodied energy. However, to enhance its durability, it is necessary to stabilize the mixtures of raw materials. This study analyzes experimental systems based on earth stabilized with bio-based polymers to evaluate their thermal properties and how these vary depending on the selected mix-design. The experimental measurements showed thermal properties comparable to conventional materials. As expected, thermal conductivity increases when porosity decreases. The minimum value is equal to 0.216 W/m·K vs. a porosity of 43.5%, while the maximum is 0.507 W/m·K vs. a porosity of 33.2%. However, the data obtained for individual systems may vary depending on the topological characteristics, which were analyzed through a model for granular materials. The modeling suggests correlations between microstructures and thermal behaviour, which can be useful to develop tools for the mix-design procedure.

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Section: Introductionmentioning

confidence: 68%

Thermal Properties of Eco-Friendly Earthen Materials Stabilized with Bio-Based Polymers: Experimental Data and Modeling Procedure for Improving Mix-Design

Cappai,

Shoukat,

Pilia

et al. 2024

Materials

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“…For this purpose, the Snedecor-Fischer test was performed, which involves comparing the population variance of given empirical results and the corresponding response function results. Fulfilment of the test consisted of checking whether the result of the null hypothesis of the test fell within the assumed 5% error area, according to Equations (3)- (5).…”

Section: Verification Of the Statistical Adequacy Of The Adopted Modelmentioning

confidence: 99%

“…These measures are to improve the thermal comfort of building occupants. This is extremely important because, according to [ 3 , 4 , 5 ], it is the instantaneous level of satisfaction with the thermal conditions of the building occupants that will determine the instantaneous (peak) heating and cooling demand. In turn, this has a direct impact on economic and environmental costs by increasing the carbon footprint of the demand.…”

Section: Introductionmentioning

confidence: 99%

Multi-Faceted Analysis of Phase-Change Composite Intended for Autonomous Buildings

Musiał,

Lichołai

2024

Materials

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This paper presents the long-term, holistic results of research into an innovative heat accumulator based on an organic phase-change material in the form of a mixture of aliphatic alkanes, molecular silica sieves, carbon recyclate and epoxy and cement matrices. The research included chemical testing of vacuum soaking of molecular silica sieves with a liquid phase-change material. The results proved an improvement in the heat storage efficiency of the heat accumulators due to the addition of carbon recyclate by 28%, while increasing the heat storage time by 134 min, and a reduction in PCM leakage due to the use of molecular silica sieves. In addition to its cognitive scientific value, another research objective of the work achieved was to obtain response functions in the form of approximating polynomials. They provide a useful, validated and verified tool to predict the physical and chemical characteristics of heat accumulators with different contents of individual components. As part of the ongoing research, technical problems related to leak-proofing assurance and matrix selection for organic phase-change materials were also solved. The solution presented is in line with the issues of efficient use of renewable energy, low-carbon and energy-efficient circular economy.

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“…Furthermore, the insulation material used in the 3DP concrete house was spray foam insulation, as per 3DP concrete company information, which was different from other case houses that had glass wool insulation with an R2.6 value. When integrated with supplementary materials, concrete's thermal performance may exceed that of timber and steel constructions, thus alleviating the necessity for insulation materials within their respective building envelopes [65]. The term "thermal performance" refers to a building's capacity to adapt to changes in external conditions while preserving internal thermal comfort [66].…”

Section: Summary Of Total Materials Impactsmentioning

confidence: 99%

Appraising the Feasibility of 3D Printing Construction in New Zealand Housing

Khan,

Dani,

Lim

et al. 2024

Buildings

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The construction industry in New Zealand is significantly impacted by the importance of housing, particularly as urbanisation continues to grow in major cities. Modern construction methods, such as offsite construction and building automation, evolving into digital manufacturing and construction in the industry, have become prominent. Despite the global recognition of 3D printing technology, its adoption in the construction industry in New Zealand is still relatively limited. This study aims to examine the feasibility of 3D printing construction in response to current market challenges, innovation, and the 2050 net-zero carbon goal. Utilising Building Information Modelling (BIM) and Life Cycle Assessment (LCA) approaches, this study investigated the environmental impacts of three housing types: 3D printing (3DP), light steel framed (LSF), and timber. This study used cradle-to-cradle as the system boundary. The results indicate that the 3DP house emits 20% fewer carbon emissions than the traditional timber house and 25% less than the LSF house. Additionally, the 3DP house exhibits a 19% lower annual electric energy consumption than the timber house. Therefore, in response to the growing housing demand in New Zealand, the construction industry must innovate and embrace digital and advanced construction methods, including the adoption of 3D printing.

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Thermal performance of different construction materials used in New Zealand dwellings comparatively to international practice – A systematic literature review

Cited by 9 publications

References 137 publications

Thermal Properties of Eco-Friendly Earthen Materials Stabilized with Bio-Based Polymers: Experimental Data and Modeling Procedure for Improving Mix-Design

Thermal Properties of Eco-Friendly Earthen Materials Stabilized with Bio-Based Polymers: Experimental Data and Modeling Procedure for Improving Mix-Design

Multi-Faceted Analysis of Phase-Change Composite Intended for Autonomous Buildings

Appraising the Feasibility of 3D Printing Construction in New Zealand Housing

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