Effects of shape-stabilized phase change materials in cementitious composites on thermal-mechanical properties and economic benefits

Jeon, In Kyu; Azzam, Abdullah; Jebaei, Hussein Al; Kim, Yong-Rak; Aryal, Ashrant; Baltazar, Juan-Carlos

doi:10.1016/j.applthermaleng.2022.119444

Cited by 19 publications

(2 citation statements)

References 56 publications

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“…Another method to avoid the leakage of PCMs above their melting temperature is shape stabilization, usually by using porous materials. The shape-stabilization method with porous lightweight materials can limit PCM leakage during the phase transition, but can also improve selected properties such as the thermal conductivity [79].…”

Section: Pcms Shape Stabilization Using Bio-based Polymersmentioning

confidence: 99%

Bio-Based Polymers for Environmentally Friendly Phase Change Materials

Pielichowska,

Nowicka-Dunal,

Pielichowski

2024

Polymers

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Phase change materials (PCMs) have received increasing attention in recent years as they enable the storage of thermal energy in the form of sensible and latent heat, and they are used in advanced technical solutions for the conservation of sustainable and waste energy. Importantly, most of the currently applied PCMs are produced from non-renewable sources and their carbon footprint is associated with some environmental impact. However, novel PCMs can also be designed and fabricated using green materials without or with a slight impact on the environment. In this work, the current state of knowledge on the bio-based polymers in PCM applications is described. Bio-based polymers can be applied as phase-change materials, as well as for PCMs encapsulation and shape stabilization, such as cellulose and its derivatives, chitosan, lignin, gelatin, and starch. Vast attention has been paid to evaluation of properties of the final PCMs and their application potential in various sectors. Novel strategies for improving their thermal energy storage characteristics, as well as to impart multifunctional features, have been presented. It is also discussed how bio-based polymers can extend in future the potential of new environmentally-safe PCMs in various industrial fields.

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Section: Pcms Shape Stabilization Using Bio-based Polymersmentioning

confidence: 99%

Bio-Based Polymers for Environmentally Friendly Phase Change Materials

Pielichowska,

Nowicka-Dunal,

Pielichowski

2024

Polymers

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“…Therefore, in recent years, there has been an increased interest in alternative studies aiming to produce building materials without using cement. The fact that alkali-activated composite materials produced using industrial waste products and/or recycled products have much lower CO2 emissions compared to Portland cement has become an important issue in materials science [4][5][6][7]. Therefore, the production of alkali-activated materials has contributed to both the reduction of carbon dioxide emissions and the development of sustainable building materials with adequate mechanical parameters [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Designing Hollow Brick Waste Based Alkali Activated Composites by Taguchi Method

KURTAY YILDIZ

2024

Sakarya University Journal of Science

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The use of waste materials in alkali-activated material technologies is important in terms of sustainability. The production of alkali-activated composites (AAC) with hollow brick waste (HBW) as a binder may contribute to solving existing environmental problems related to the depletion of natural resources. In this study, mortars were produced using different concentrations (6 M, 8 M, and 10 M NaOH) and Alkaline Activator/Powder Material (AA/PM) ratios of 0.30, 0.35, and 0.40 through the alkali activation method. The hollow brick waste (HBW) powder was obtained by grinding inactive bricks in brick factories. The prepared mortars were cured separately for each mixture at 90°C for 24 hours. Compressive and flexural strength tests were performed on the prepared perforated hollow brick waste-based composites. The Taguchi method was used to determine the optimum mixing ratios by conducting compressive and flexural strength tests on the produced AAC. To optimize the parameters determined using the Taguchi method, the best mixing ratios were determined using the L9 (3^2) orthogonal index. The compressive and flexural strengths of the mixtures were evaluated considering the signal to noise ratio "larger the better" and the highest compressive strength value was 63.669 MPa and the highest flexural strength value was 6.629 MPa according to the optimum values. According to the obtained results, it was determined that the AAC produced at 6 M NaOH and 0.30 AA/PM ratio exhibited the highest compressive and flexural strength values.

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