Mechanical and thermal characterization of concrete with incorporation of microencapsulated PCM for applications in thermally activated slabs

Figueiredo, A.; Lapa, José Roberto do Amaral; Vicente, Romeu; Cardoso, Claudino

doi:10.1016/j.conbuildmat.2016.02.225

Cited by 72 publications

(22 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of the primary purposes related to the development of FSPCMs consists in the mitigation of the negative effects of commercially produced microencapsulated PCMs on the mechanical strength of designed composite materials, as described in several works [12,13,20]. The abrasion and possible damage of the polymer shells used during the mixing process represent important factors limiting a broader utilization of encapsulated PCMs in material design practice.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…The temperature moderation capability of PCMs has attracted the attention of several researchers intending to develop concrete with improved thermal storage properties [12,13]. However, according to the restriction related to the negative effect of incorporated PCMs on material properties, a major barrier can be viewed in PCMs compatibility with cementitious materials, which limits broader PCM applications [14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and Characterization of Novel Plaster with Improved Thermal Energy Storage Performance

et al. 2019

View full text Add to dashboard Cite

Thermal energy storage systems based on latent heat utilization represent a promising way to achieve building sustainability and energy efficiency. The application of phase change materials (PCMs) can substantially improve the thermal performance of building envelopes, decrease the energy consumption, and support the thermal comfort maintenance, especially during peak periods. On this account, the newly formed form-stable PCM (FSPCM) based on diatomite impregnated by dodecanol is used as an admixture for design of interior plasters with enhanced thermal storage capability. In this study, the effect of FSPCM admixture on functional properties of plasters enriched by 8, 16 and 24 wt.% is determined. On this account, the assessment of physical, thermal, hygric, and mechanical properties is done in order to correlate obtained results with applied FSPCM dosages. Achieved results reveal only a minor influence of applied FSPCM admixture on material properties when compared to negative impacts of commercially produced PCMs. The differential scanning calorimetry discloses variations of the phase change temperature, which ranging from 20.75 °C to 21.68 °C and the effective heat capacity increased up to 15.38 J/g accordingly to the applied FSPCM dosages.

show abstract

Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Novel Plaster with Improved Thermal Energy Storage Performance

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Given its high potential in terms of increased melting heat, and in spite of the difficult material selection process, the use of latent heat storage materials such as PCMs has been thoroughly investigated by the scientific community [22]- [26]. In particular, a huge piece of literature focused on the combination of suitable phase change materials with cementitious materials, although several aspects related to the mechanical performance of PCM-filled concrete still need to be clarified [27], [28] and PCM capsules in existing papers present comparable characteristics and therefore the same limitations, while new kinds of bigger capsules may enhance the PCM quantity within the structural element without compromising its mechanical performance and acting as PCM-filled aggregate. Therefore, this kind of scientific effort is still needed and may be of interest for the improvement of the thermo-environmental performance of new constructions built with potentially adaptive concrete also since the same concrete is, by any means, the most widespread construction material worldwide [28], [29].…”

Section: Background On Concrete With Pcmmentioning

confidence: 99%

Multifunctional smart concretes with novel phase change materials: Mechanical and thermo-energy investigation

et al. 2018

View full text Add to dashboard Cite

Energy performance in buildings and integrated systems represents a key aspect influencing anthropogenic emissions worldwide. Therefore, novel multifunctional materials for improving envelope thermo-energy efficiency through passive techniques are presently attracting notable researchers' effort. In this view, the integration of phase change materials (PCM) into structural concrete showed interesting effects in enhancing the material thermal capacity while keeping proper structural strength. This work presents a multiphysics thermo-mechanical investigation concerning innovative concretes incorporating paraffin-based PCM suitable for structural-thermal multifunctional applications in high-energy efficiency buildings. Both classic microPCM-capsules and the novel more pioneering macroPCM-capsules with 18°C phase transition temperature are used for the new composite preparation. Results confirm the thermal benefits of PCM and demonstrate that the addition of PCM reduces the mass density of concrete by almost twice PCMs weight. Average compressive strength decreases with increasing the amount of PCM, but its coefficient of variation is not as negatively affected, which is promising in terms of structural reliability. Indeed, a 1% weight content of microPCM and macroPCM results in reduced coefficients of variation of the compressive strength, determining an increase in characteristic 2 compressive strength. This benefit might be associated to both a filler effect of the PCM and to a positive thermal interaction between inclusions and cement hydration products. The multifunctional analysis showed promising performance of PCM-based macro-capsules as aggregates, even if their concentration is relatively minor than the classic micro-capsules already acknowledged as effective additives for high energy efficient cement-based materials.

show abstract

“…In most studies, paraffin as the PCM core material is encapsulated in a polymeric shell. Most microencapsulated PCMs used in concrete have either a polymethyl methacrylate (PMMA) [ 59 , 60 , 61 , 62 , 63 , 64 , 65 ] or melamine formaldehyde (MF) shell [ 63 , 66 , 67 , 68 , 69 , 70 ]. In one study, urea formaldehyde was used as a shell material [ 71 ].…”

Section: Phase Change Materials In Concrete Technologymentioning

confidence: 99%

Smart Crack Control in Concrete through Use of Phase Change Materials (PCMs): A Review

Šavija

2018

Materials

View full text Add to dashboard Cite

Cracks in concrete structures present a threat to their durability. Therefore, numerous research studies have been devoted to reducing concrete cracking. In recent years, a new approach has been proposed for controlling temperature related cracking—utilization of phase change materials (PCMs) in concrete. Through their ability to capture heat, PCMs can offset temperature changes and reduce gradients in concrete structures. Nevertheless, they can also influence concrete properties. This paper presents a comprehensive overview of the literature devoted to using PCMs to control temperature related cracking in concrete. First, types of PCMs and ways of incorporation in concrete are discussed. Then, possible uses of PCMs in concrete technology are discussed. Further, the influences of PCMs on concrete properties (fresh, hardened, durability) are discussed in detail. This is followed by a discussion of modelling techniques for PCM-concrete composites and their performance. Finally, a summary and the possible research directions for future work are given. This overview aims to assure the researchers and asset owners of the potential of this maturing technology and bring it one step closer to practical application.

show abstract

Mechanical and thermal characterization of concrete with incorporation of microencapsulated PCM for applications in thermally activated slabs

Cited by 72 publications

References 26 publications

Preparation and Characterization of Novel Plaster with Improved Thermal Energy Storage Performance

Preparation and Characterization of Novel Plaster with Improved Thermal Energy Storage Performance

Multifunctional smart concretes with novel phase change materials: Mechanical and thermo-energy investigation

Smart Crack Control in Concrete through Use of Phase Change Materials (PCMs): A Review

Contact Info

Product

Resources

About