The performance effect of PEG-silica fume as shape-stabilized phase change materials on mechanical and thermal properties of lightweight concrete panels

Mokhtari, Sahar; Madhkhan, Morteza

doi:10.1016/j.cscm.2022.e01298

Cited by 11 publications

(5 citation statements)

References 17 publications

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“…(2) The high water absorption rate of broken brick aggregate can significantly affect the hydration of the cement inside the recycled brick, resulting in a negative impact on the overall strength of the brick [2]. (3) The addition of composite shaped PCM particles increases the size of the voids inside the recycled aggregate bricks, and as the added ratio of composite shaped PCM increases, the internal structure of the prepared composite shaped PCM recycled aggregate pavement bricks becomes less tightly combined, inevitably resulting in a decrease in overall strength [35]. Generally, the incorporation of PEG-400/SiO 2 and Tet/SiO 2 composite shaped PCM reduces the strength of composite shaped PCM recycled aggregate pavement bricks.…”

Section: Thermal Conductivitymentioning

confidence: 99%

Experimental Evaluation of the Properties of Recycled Aggregate Pavement Brick with a Composite Shaped Phase Change Material

Guo

et al. 2022

Materials

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Brick waste makes up a significant part of the solid waste that is generated from building demolition globally. The disposal of this waste consumes land, causes environmental pollution, and is a waste of resources. In order to use this construction waste and increase its functionality, two types of stable-shape PEG-400/SiO2 composite shaped PCM and Tet/SiO2 composite shaped PCM were studied and added to recycled aggregate pavement bricks, and two new types of composite shaped PCM recycled aggregate pavement bricks were created. SEM, DSC, TGA, and other test methods found the two PCMs to be successfully adsorbed by SiO2, and the setting effect of PEG-400/SiO2 was found to be better than that of Tet/SiO2. The physicochemical properties of both composite shaped PCMs remained stable within the TGA test temperature range. The prepared PCM was added to the recycled aggregate pavement brick. A comprehensive analysis of the properties of the composite shaped PCM recycled orthopedic pavement brick found the compressive strength and flexural strength of Tet/SiO2 PCM recycled aggregate pavement brick to be significantly higher than those of PEG-400/SiO2 PCM recycled aggregate pavement brick. With a recycled aggregate content of 60% and a compound shaped PCM content of 5%, the 28-day strength of the recycled aggregate pavement brick was found to be higher than that of the recycled aggregate pavement brick with a recycled aggregate content of 70% and a compound shaped PCM content of 10%. This study provides reference for the optimization and upgrading of the thermal storage performance of composite shaped PCM in practical applications, and is of great significance for promoting thermal energy storage development and expanding its application range.

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Section: Thermal Conductivitymentioning

confidence: 99%

Experimental Evaluation of the Properties of Recycled Aggregate Pavement Brick with a Composite Shaped Phase Change Material

Guo

et al. 2022

Materials

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“…Abundant work has shown that adding the phase change materials (PCM) into concrete can improve the thermal inertia of concrete materials without increasing the energy consumption [8,9], which is due to the advantages of PCM with high energy storage density, absorbing or releasing energy in small temperature intervals, and the phase transition without accompanying volume change [10][11][12]. Much recent research has been conducted to investigate the properties of PCM concrete [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Thermal Response of the Lightweight Aggregate Concrete Panels Integrated with MPCM

Zhu,

Wang,

Sang

et al. 2024

Buildings

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This paper determines the best design parameters and uses conditions of lightweight aggregate concrete panels containing microencapsulated phase change materials (MPCM-LWAC panels). The main work of this paper includes the followings: (1) The fundamental properties (dry density, thermal conductivity, and specific heat capacity) of MPCM-LWAC were researched to reveal the effect of MPCM dosage on these properties. (2) A model test was carried out to quantify the effect of MPCM dosage on the thermal response of the MPCM-LWAC panel exposed to realistic climate conditions. (3) The numerical simulation was conducted to investigate the effect of MPCM dosage, panel thickness, and outdoor temperature conditions on the thermal response of the MPCM-LWAC panel, which helps to determine its optimum design parameters and use condition. The results showed that the incorporation of MPCM results in lower dry density and thermal conductivity of MPCM-LWAC but higher specific heat capacity. The more MPCM dosage in the MPCM-LWAC panel with a thickness of 35 mm, the lower the energy demand to keep a comfortable interior temperature. Most notably, when the panel thickness exceeds 105 mm, the MPCM-LWAC panel with 5% MPCM only delays the peak temperature. Moreover, the optimal use condition for MPCM-LWAC panels is an average outdoor temperature of 25 °C, which makes the energy demand attain a minimum.

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“…In order to obtain good thermal insulation, the material that will be utilised for thermal insulation must have a microporosity. This requirement stems from the heat transmission concept [13,14]. The thermal insulating capabilities of FC are second to none.…”

Section: Introductionmentioning

confidence: 99%

Study on the Performance Behaviour of Fibre Reinfored Foam Concrete

Dhanalakshmi,

Shahul Hameed,

Jeyaseela

et al. 2024

MSF

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In the construction sector, concrete is indispensable. Non-structural uses account for a significant portion of concrete production. Foamed concrete (FC) is incredibly porous, and as the number of voids increases, the material's thermal characteristics decrease. Since these uses need a substantial amount of concrete, researching them might yield useful information for optimizing concrete's material efficiency and making better use of its waste products. FC is excellent in compression but poor in tension because it creates multiple microcracks. FC cannot withstand the tensile stress induced by the applied forces without additional reinforcement elements. Hence, this research investigates the mechanical properties of polypropylene (PP) fibers based foam concrete. The utilization of effective materials such as cement, flyash, silica fume and PP fibre were used in this investigation. In this study, a novel invention is proposed for designing and strength prediction of foam concrete and find out the strength properties such as compressive strength, split tensile strength and flexural strength of fibre reinforced foam concrete were determined and the experimental and predictive value of compressive strength were also determined with the help of python. The results provide a clear idea of the efficient use of fly ash and silica fume for the manufacture of light weight based products that promote profitability, sustainability and entrepreneurship for youth in developing countries such as India, and it is important by conserving natural resources through savings in the consumption of cement and aggregates.

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The performance effect of PEG-silica fume as shape-stabilized phase change materials on mechanical and thermal properties of lightweight concrete panels

Cited by 11 publications

References 17 publications

Experimental Evaluation of the Properties of Recycled Aggregate Pavement Brick with a Composite Shaped Phase Change Material

Experimental Evaluation of the Properties of Recycled Aggregate Pavement Brick with a Composite Shaped Phase Change Material

Experimental and Numerical Study on the Thermal Response of the Lightweight Aggregate Concrete Panels Integrated with MPCM

Study on the Performance Behaviour of Fibre Reinfored Foam Concrete

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