Assessment of PCM/SiC-based composite aggregate in concrete: Mechanical, physical and microstructural properties

Kim, Hong Gi; Qudoos, Abdul; Jeon, In Kyu; Ryou, Jae-Suk

doi:10.1016/j.conbuildmat.2020.120088

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…This behavior could be attributed to small portions of the PEG800 polymer possessing a low viscosity at room temperature [ 27 ], with portions lying on the surface of the Lecce Stone grains that can contribute to improving the workability of the mortar mix with replacement of a limited amount of the required water. This feature can, nevertheless, represent an important advantage, potentially counteracting the detrimental effects on mechanical properties brought about by the addition of a PCM in the mortars, as previously reported [ 26 , 37 , 38 , 39 ].…”

Section: Resultsmentioning

confidence: 63%

Physical Properties of Eco-Sustainable Form-Stable Phase Change Materials Included in Mortars Suitable for Buildings Located in Different Continental Regions

2022

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Starting from two low-cost, low-environmental-impact polymers belonging to the Polyethylene Glycol (PEG) family, i.e., PEG 800 and PEG 1000, two form-stable phase change materials were produced. The two PEGs differ in molecular weight and, as a consequence, the melting and crystallization range of temperatures. The PCMs were obtained, including the PEG, in a liquid state, inside the pores of Lecce Stone flakes, obtained as waste pieces from its processing. A simple and inexpensive impregnation process was selected to produce the PCMs, thus adopting low-environmental-impact materials and cheap processes, and respecting circular economy principles. The two PCMs, the first composed of PEG 800, namely LS/PEG800, and the second composed of a 50/50%wt. mix of the different LS/PEGs, i.e., LS/PEG800_LS/PEG1000, were added as aggregates to four types of mortars, based on aerial and hydraulic lime, gypsum, and cement. The obtained mortars were characterized in their fresh state to assess their workability, and in a solid state after a proper cure to determine their characteristic Latent Heat Thermal Energy Storage (LHTES) properties and mechanical properties in both flexural and compressive modes, taking the mortars not containing any PCM as the reference. The results revealed that, with the proper selection of mortar formulations, it was possible to achieve suitable workability and adequate mechanical characteristics. The selection of a PEG with a low range of phase change temperatures, such as PEG 800, allows one to obtain mortars characterized by a melting/crystallization range that can be considered appropriate in applications characterized by cold climates. The production of a mixed PCM, composed of both PEGs, led to mortars displaying a large interval of melting/crystallization temperatures, which could be suitable in both warm and cold climates.

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Section: Resultsmentioning

confidence: 63%

Physical Properties of Eco-Sustainable Form-Stable Phase Change Materials Included in Mortars Suitable for Buildings Located in Different Continental Regions

2022

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“…Phase change materials form cement-matrix composites that are used in construction as load-bearing components. The papers [ 32 , 33 ] present the results of strength tests of organic PCM composites with a slag aggregate matrix and silicon carbide, which confirmed its greater strength compared to the reference PCM composite with a matrix of natural aggregate. The properties of PCM that stabilize temperature changes are also used in the creation of food packaging.…”

Section: Introductionmentioning

confidence: 84%

“…It is particularly important to define the possibility of a useful application of biochars obtained from the pyrolysis of various types of waste [ 25 , 26 ].Phase change materials are used in construction and other industries, creating new mixtures and composites and allowing for more effective heat storage in their structure. Below, in [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ], examples of work on PCM composites are presented in order to improve their properties and increase the possibility of using the min construction.…”

Section: Introductionmentioning

confidence: 99%

Functioning of Heat Accumulating Composites of Carbon Recyclate and Phase Change Material

Musiał

Pękała

2022

Materials

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The article presents the results of experimental research together with the development of a response function presenting the thermal functioning of a new composite of a phase change material with carbon recyclate. The empirical research proved the improvement of the thermal functioning of the phase change material as a result of modifying its structure with carbon-based recycling material. The conducted experimental tests and statistical analysis proved that the obtained innovative composite is characterized by a more effective distribution of stored heat than the pure phase change material, which resulted in reduction of the heating and cooling time of the package by 10 min. The obtained innovative composite can improve the thermal efficiency of short-term heat storage systems, both in building components and in elements of heating and cooling systems, and translates into their increase in thermal efficiency.

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“…The concrete mixes were designed with a target strength of 30 Mpa [ 12 ]. The slump and air content were 180 mm and 4.5% respectively.…”

Section: Methodsmentioning

confidence: 99%

“… SEM Images with E-DAX analysis after 3 days (( a ); plain + SiC, ( b ); EA100+SiC). Reprinted from [ 12 ]. …”

Section: Figurementioning

confidence: 99%

Investigation of Newly Developed PCM/SiC Composite Aggregate to Improve Residual Performance after Exposure to High Temperature

Yoo

Lee

et al. 2022

Materials

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High temperature conditions, such as fire, are detrimental factors to the mechanical and chemical properties of concrete. In this paper, the authors developed a new type of coarse aggregate, named PCM/SiC composite aggregate (enhanced aggregate: EA), to improve fire-resistance performance. To investigate the validity of EA for construction materials, a compressive strength test, static modulus of elasticity, X-ray diffraction (XRD), and scanning electron microscopy (SEM) were conducted. In addition, this EA has been developed to improve residual performance after exposure to high temperature, with residual compressive strength and internal temperature measurement tested at 1000 °C. Furthermore, chemical properties after heating were investigated by XRD and SEM-EDAX. The results show that the percentage of residual compressive strength of heated concrete with EA is higher than plain concrete. The concrete with EA exhibited primary cement composites such as C-H and C-S-H after exposure to high temperature through XRD and SEM-EDAX. On the other hand, major hydration products could not be observed in plain concrete. PCM and SiC offer an opportunity to delay the increase in concrete temperature. From evaluation of the results, we can see that EA enhanced the residual performance of concrete after exposure to high temperature conditions.

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Assessment of PCM/SiC-based composite aggregate in concrete: Mechanical, physical and microstructural properties

Cited by 13 publications

References 35 publications

Physical Properties of Eco-Sustainable Form-Stable Phase Change Materials Included in Mortars Suitable for Buildings Located in Different Continental Regions

Physical Properties of Eco-Sustainable Form-Stable Phase Change Materials Included in Mortars Suitable for Buildings Located in Different Continental Regions

Functioning of Heat Accumulating Composites of Carbon Recyclate and Phase Change Material

Investigation of Newly Developed PCM/SiC Composite Aggregate to Improve Residual Performance after Exposure to High Temperature

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