An investigation towards the optimum design of retro-reflective materials as building envelopes for the enhancement of optical performance

Retro-reflective plaster coatings after outdoor aging and soiling: an in-lab optical performance characterization

“…Consequently, the comparison of reflection percentages is feasible exclusively within the context of the same sample's angular reflection distribution and is not applicable for different samples. All RR samples in pristine conditions exhibit a good RR capability, as described in [16]. RRϕ1, ρs2 exhibited the highest RR capability among the RR samples in pristine conditions for each incident radiation angles investigated.…”

“…In this paragraph, results of the investigation of the samples' optical characterization are presented and discussed. The obtained data are analysed and then compared with data of the same samples in pristine conditions already discussed in a previous work by the Authors [16].…”

“…The analysed samples were manufactured and partially investigated in a previous work [16]. Six RR samples were produced by painting a 10 x 10 cm mortar square with white high-reflective paint and embedding RR glass beads with different diameters and superficial densities, as shown in Table 1…”

“…The objective of this paper is to investigate the impact of natural aging and soiling exposure on the optical characteristics of RR coatings, which have been fabricated using glass beads of different diameters distributed according to three ranges of superficial density. In a previous work, the Authors [16] have characterized the optical performance of these same samples in their original state. In order to determine the optical performance of the aged samples, spectrophotometric and angular reflectivity measurements were conducted in this study.…”

The effect of a protective layer on the optical behavior of retro-reflective paintings for building envelopes

“…The current investigation worldwide is focused on several aspects. One is the industrial development of the RR material, based on the design of layers (type of support, microspheres’ superficial density and diameter) and on the characterization of the samples in terms of optic-energy performance [ [27] , [28] , [29] ]. Another paper focused on the effect of the RR materials in function of the geographical locations, showing that RR have an important cooling effect at middle or high latitudes while there are no benefits comparing to diffusive materials at very low latitudes [ 30 ].…”