Reflectance properties analysis of mineral based mortars for renders: Research of their energy performance

Barbero–Barrera, María del Mar; Acosta, Joaquín Campos; Neila-González, Francisco Javier

doi:10.1016/j.enbuild.2014.03.024

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…However, the maximum difference of the results is closer to was found by other studies as Levinson, Akbari and Berdahl [16] and Barbero-Barrera, Campos-Costa and Neila-González [19].…”

Section: Comparison Between Resultssupporting

confidence: 88%

“…The influence of the colours also was verified by Barbero-Barrera, Campos-Costa and Neila-González [19].…”

Section: Comparison Between Resultsmentioning

confidence: 61%

“…Studies made by Zinzi, Carnielo and Rossi [10], Barbero-Barrera, Campos-Acosta and Niela-González [19] Levinson et al [20] reported that the roughness of the specimens could be an important contributor to the variation of the solar reflectance. The finishing coating of the ETICS presents a rough surface.…”

Section: Influence Of Roughnessmentioning

confidence: 99%

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Solar reflectance of ETICS finishing coatings – a comparison of experimental techniques

et al. 2020

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The solar reflectance has a significant role in the thermal behaviour and surface temperature of ETICS finishing coats. Incomplete information of solar reflectance of ETICS with nanopigments can sometimes difficult their adequate selection. In this work, the solar reflectance of different ETICS finishing coats was measured using two distinct methodologies, and the importance of the adopted procedure was discussed. The experimental methodologies used were: i) the adapted conventional pyranometer technique (non-ASTM E1918A), which measures the global solar reflectance; and ii) the use of the spectrophotometry, to measure the spectral reflectance. It was verified that the E1918A methodology is more sensitive to environmental conditions than the spectrophotometry procedure. Also, the calculation of solar reflectance with spectrophotometer can be carried out by the 50 or 100 ordinates. However, the surface characteristics, as the concentration of pigments and roughness, affect more the solar reflectance measured with the spectrophotometer than with the pyranometer. It was verified that the nanopigments could improve solar reflectance and change the spectral reflectance. The results showed that, if the procedure is well applied, both methodologies could be used to evaluate the advantages of incorporating nanopigments in façade finishing coatings and also to assess the durability of these materials.

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“…However, the maximum difference of the results is closer to was found by other studies as Levinson, Akbari and Berdahl [16] and Barbero-Barrera, Campos-Costa and Neila-González [19].…”

Section: Comparison Between Resultssupporting

confidence: 88%

“…The influence of the colours also was verified by Barbero-Barrera, Campos-Costa and Neila-González [19].…”

Section: Comparison Between Resultsmentioning

confidence: 61%

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Solar reflectance of ETICS finishing coatings – a comparison of experimental techniques

et al. 2020

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“…Coatings with specially designed thermal reflectance and infrared emittance are recognized to effectively prevent the heat transfer from outside to inside of building and vice versa [10,11]. In particular, inorganic mineral-based coatings have been found to exhibit outstanding thermal insulation performance, together with other potential benefits such as environmental benignity and healthy profit [12,13]. For instance, coatings composed of dolomite or limestone marble powder and glass beads were shown to enhance the infrared emittance of the concrete wall and reduce the solar reflectance, resulting in the significant reduction of cooling load by almost 20% on annual basis [14].…”

Section: Introductionmentioning

confidence: 99%

Formation and characterization of ceramic coating from alumino silicate mineral powders in the matrix of cement composite on the concrete wall

Yu¹,

Ri²,

Kim³

et al. 2018

Preprint

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Enhancement of thermal performance of concrete wall is nowadays of great importance in reducing the operational energy demand of buildings. We developed a new kind of inorganic coating material based on SiO 2 -Al 2 O 3 -rich minerals and Portland cement (PC) powder. The finely pulverized mineral powder with the particle size distribution (PSD) of 0.4-40 µm was mixed with the vehicle solvent containing some agents, cement powder with PSD of 2-100 µm, and water in the certain weight ratio, producing the colloid solution. After application within 2 hours to the plaster layer of concrete wall and sufficient long hardening period of over three months, the coating layer of 0.6-1.0 mm thickness was observed to become a densified ceramic. Powder X-ray diffraction (XRD) experiments were performed to identify the crystalline components of minerals, cement and ceramic coating powders. Three-and two-dimensional surface morphologies and chemical compositions of coating material were obtained with the optical interferometer and scanning electron microscope (SEM) equipped with an energy dispersive X-ray analyzer (EDX). These XRD and SEM/EDX analyses demonstrated obviously that the coating layer is mainly composed of the calcium-silicate-hydrate (C-S-H) and the calcium-aluminate-hydrate (C-A-H) ceramics with the relatively small number of closed pores (10% porosity) compared with the cement mortar and concrete layers. Two-step hydrations of cement and subsequently SiO 2 -Al 2 O 3 promoted by the alkali product Ca(OH) 2 were proposed as the main mechanism of ceramic formation.

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Assessment of limestone cladding deterioration due to crystallisation of salts by non-destructive techniques

Sánchez

Navacerrada

Fort

et al. 2023

Construction and Building Materials

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Reflectance properties analysis of mineral based mortars for renders: Research of their energy performance

Cited by 6 publications

References 20 publications

Solar reflectance of ETICS finishing coatings – a comparison of experimental techniques

Solar reflectance of ETICS finishing coatings – a comparison of experimental techniques

Formation and characterization of ceramic coating from alumino silicate mineral powders in the matrix of cement composite on the concrete wall

Assessment of limestone cladding deterioration due to crystallisation of salts by non-destructive techniques

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