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Infrared thermography is an evaluation technique that helps to identify anomalies and can provide information on their incidence and severity. The aim of this study is to apply quantitative thermography to study a case of severe cracks in facade analyzing the evolution of temperatures and Delta-T. The temperature evolution was studied over a day. There was sun incidence occurring during part of the day, allowing to calculate and assess the evolution of the associated temperatures. Thermograms were acquired hourly during the study period. The highest temperatures were observed at 12:00 noon, and the larger Delta-T between 10:00 and 12:00. There were differences between the Delta-T profiles among the three regions studied. The best time for analysis is when Delta-T is higher. Cracks with higher Delta-T were considered more degraded, and generalized branched cracks did not allow a comparative conclusion.

This paper analyses the influence of the fine fraction of two types of construction and 5 demolition waste (CDW1 and CDW2) on the properties of recycled aggregates (RA) and 6 masonry mortars. The CDW1's main component was ceramic while the CDW2 were 7 concrete. Three different kinds of fine RA were produced from each source of CDW; the 8 first type was produced by only using the fraction finer than 4.76 mm, the second one by 9 employing only the coarser fraction than 4.76 mm, and the third type was a mix of both 10 fractions of CDW. The masonry mortars were produced employing the 100% substitution 11 of natural aggregates. The results show that all the recycled mortars achieved a higher 12 water retentivity capacity than that of the conventional mortars. However, the sole use of 13 the fine fraction of the CDW was found to have a deleterious effect over the hardened 14 mortar properties, thus making it only adequate for the rendering or bonding of interior 15 walls at or above ground level. In contrast a combination of both the fine fraction and 16 coarse fraction of the CDW in the production of the RA achieved all the minimum 17 requirements for rendering and bonding masonry mortar. 18 Highlights 20  Two sources of CDW, one with ceramic and other with concrete as main components, 21 were employed. 22  Three different RA were obtained from two different sources of CDW. 23  Masonry mortars employing 100% of recycled aggregate were validated. 24  Ceramic high content recycled aggregates mortars achieved the most adequate 25 properties. 26  The employment of the coarse fraction of the CDW guarantee high quality aggregates 27 for masonry mortar. 28

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