Experimental study of geopolymer mortar with incorporated PCM

Shadnia, Rasoul; Zhang, Lianyang; Li, Peiwen

doi:10.1016/j.conbuildmat.2015.03.066

Cited by 151 publications

(56 citation statements)

References 27 publications

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“…This provides not only an extremely high heat transfer area, but also prevents the leakage of PCM and interactions with the building structure. Microencapsulated phase change materials (MPCM) are therefore able to support PCM for utilization as thermal storage materials in building applications and energy storage systems [14][15][16][17][18][19]. Concrete-based materials with high thermal properties and high mechanical strength are potential candidates for MPCM integration.…”

Section: Introductionmentioning

confidence: 99%

Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications

Cao

Pilehvar

Salas-Bringas

et al. 2017

Energy Conversion and Management

258

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a b s t r a c tConcretes with a high thermal energy storage capacity were fabricated by mixing microencapsulated phase change materials (MPCM) into Portland cement concrete (PCC) and geopolymer concrete (GPC). The effect of MPCM on thermal performance and compressive strength of PCC and GPC were investigated. It was found that the replacement of sand by MPCM resulted in lower thermal conductivity and higher thermal energy storage, while the specific heat capacity of concrete remained practically stable when the phase change material (PCM) was in the liquid or solid phase. Furthermore, the thermal conductivity of GPC as function of MPCM concentration was reduced at a higher rate than that of PCC. The power consumption needed to stabilize a simulated indoor temperature of 23°C was reduced after the addition of MPCM. GPC exhibited better energy saving properties than PCC at the same conditions. A significant loss in compressive strength was observed due to the addition of MPCM to concrete. However, the compressive strength still satisfies the mechanical European regulation (EN 206-1, compressive strength class C20/25) for concrete applications. Finally, MPCM-concrete provided a good thermal stability after subjecting the samples to 100 thermal cycles at high heating/cooling rates.

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Section: Introductionmentioning

confidence: 99%

Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications

Cao

Pilehvar

Salas-Bringas

et al. 2017

Energy Conversion and Management

258

View full text Add to dashboard Cite

show abstract

“…One of the most effective 'active methods' to reduce a building's energy consumption is to incorporate a phase change material (PCM) as an additive into the desired building component. The building components used for the incorporation of PCM have ranged from actual cement powder [6], mortar [7] concrete [8], plastering mortar [9] and many others [10,11,12]. PCM's have high latent heat storage densities and can, therefore, absorb thermal energy when transforming from solid to liquid or release it when turning back to solid [13].…”

Section: Introductionmentioning

confidence: 99%

Development and optimisation of phase change material-impregnated lightweight aggregates for geopolymer composites made from aluminosilicate rich mud and milled glass powder

Kastiukas

Zhou

Castro-Gomes

2016

Construction and Building Materials

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h i g h l i g h t sPCM vacuum impregnation is very successful for expanded clay lightweight aggregate. Polyester resin coating is able to retain all of the impregnated PCM from leakage. Resin coating is chemically stable and neutral, also improving thermal conductivity. Novel combination of geopolymer and thermal energy storing aggregates evaluated. ME-LWA has a high energy storage capacity of 157 J/g. a r t i c l e i n f o a b s t r a c tMacro-encapsulated aggregates (ME-LWAs) consisting of expanded clay lightweight aggregates (LWAs) impregnated with a paraffin wax phase change material (PCM) was produced. To fully exploit the thermal energy retaining properties of PCM, it is fundamental to retain as much of the PCM as possible within the pores of the LWA. This paper investigates 3 different commercial materials to create a total of 14 different coating regimes to determine the most efficient coating method and material regarding its ability at retaining the PCM. The ME-LWAs are then further used as aggregates in geopolymer binders made from a combination of aluminosilicate rich mud and waste glass. Physical properties such as thermal conductivity and mechanical strength are determined for the geopolymer binder with and without the addition of the ME-LWA. A polyester resin was determined to be the most suitable choice of coating material for the ME-LWA, producing a practically leak-proof coating. The ME-LWA was also determined to be chemically neutral, showed a 42% higher thermal conductivity than the LWA in their raw state and maintained a latent heat of 57.93 J/g before and after being used in the geopolymer binder. Carbon fibres and graphite spray were used to improve the thermal conductivity of the resin coating, however no significant increase was detected. Finally, the compressive strength and thermal conductivity results achieved are acceptable for applications in buildings for enhancement of their energy efficiency.

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“…To evaluate the thermal performance through the heat flow has been adapted the test proposed by Shadnia, et al [8], were produced five plywood cubic molds, with dimensions of (30 cm x 30 cm x 30 cm). At the top of each of the five compartments was placed a slab (30 x 30 cm²), with 5 cm of thickness of all types of concrete, the reference (CR), with EPS pearls (CAP and CBP) and recycled (CAR and CBR), as shown in Figure 2.…”

Section: Thermal Testmentioning

confidence: 99%

Study about concrete with recycled expanded polystyrene

Carvalho

Motta

2019

Rev. IBRACON Estrut. Mater.

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ResumoThis work studied the properties of lightweight concretes with addition of expanded polystyrene (EPS) for structural walls applications. EPS for being a material produced on a large scale and has low density, produces a large volume of waste. These residues are not reused, especially in Brazil. Given that, in order to perform a comparison of the performance of concrete with adding of EPS in pearls and recycled, it have been manufactured five concrete types, a control without addition of EPS and four other samples with two different percentages of EPS. The mechanical (compressive strength) and physical (density, voids content, absorption by immersion and capillarity) properties were evaluated, and tests were carried out to evaluate the thermal performance of the mixtures studied. The concretes with EPS presented compressive strength less than the reference concrete, however, the absorption for capillarity and thermal properties was better in concretes with EPS. It is concluded that it is feasible to replace the EPS in pearls by recycled EPS, due to the close results found. larga escala e possuir baixa densidade, produz um grande volume de resíduos. Esses resíduos são pouco reaproveitados, principalmente no Brasil. Diante disso, a fim de realizar uma comparação do desempenho do concreto com a adição de EPS em pérolas e o reciclado, foram fabricados cinco tipos de concretos, o primeiro de controle sem a adição de EPS e os outros quatro com duas porcentagens diferentes de EPS. Foram avaliadas as propriedades mecânicas (resistência à compressão), físicas (massa específica, índice de vazios, absorção por imersão e por capilaridade) e foram realizados testes para avaliar o desempenho térmico das misturas estudadas. Os concretos com EPS apresentaram resistência à compressão inferior ao concreto referência, entretanto, o desempenho quanto à absorção por capilaridade e às propriedades térmicas foi melhor nos concretos com EPS. Conclui-se também que é viável a substituição do EPS em pérolas por EPS reciclado, devido às proximidades nos resultados encontrados.Palavras-chave: concreto com EPS, EPS reciclado, paredes estruturais, comportamento térmico.

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Experimental study of geopolymer mortar with incorporated PCM

Cited by 151 publications

References 27 publications

Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications

Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications

Development and optimisation of phase change material-impregnated lightweight aggregates for geopolymer composites made from aluminosilicate rich mud and milled glass powder

Study about concrete with recycled expanded polystyrene

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