xmlui.dri2xhtml.METS-1.0.item-contributor-funder:
Ministerio de Economía y Competitividad (España) Ministerio de Ciencia e Innovación (España)
Sponsor:
The authors express their thanks to the Project MAT-2017-86450-C4-1-R, CSIC NANOMIND project CSIC2015-60E068 and projects CDTI (IDI-20130894 and IDI-20161120) for their financial support. Dra. E. Enríquez is indebted to MINECO for a "Torres Quevedo" contract (ref: PTQ-14-07289), which is co-financed with European Social Funds. Dr. M. Torres-Carrasco is also indebted to MINECO for a postdoctoral fellowship "Juan de la Cierva-Formación" (ref: FJCI-2016-28488).
Project:
Gobierno de España. MAT-2017-86450-C4-1-R Gobierno de España. IDI-20130894 Gobierno de España. IDI-20161120 Gobierno de España. PTQ-14-07289 Gobierno de España. FJCI-2016-28488
The use of white cements as a building material is widely employed due to its high whiteness and reflectance. However, building materials should adopt better thermal insulation characteristics to contribute for a significant urban heat-islands mitigation. In tThe use of white cements as a building material is widely employed due to its high whiteness and reflectance. However, building materials should adopt better thermal insulation characteristics to contribute for a significant urban heat-islands mitigation. In this work, synthetic feldspar has been evaluated as partial and total replacement of sand in white cement mortars. Thermal, mechanical, and optical properties of these new mortars are characterized by thermal conductivity, compression resistance test and reflectance-colorimetry, respectively. The replacement of sand by synthetic feldspar allows to obtain white mortars having [almost equal to]18% improvement in solar reflectance. Experiment under solar irradiance of mortars having synthetic feldspars reduce the surface heating of the mortar in 25% and the heating transmission to the rear of the mortar in >55%. Moreover, the high crystallinity of the synthetic feldspar reduces the mortar expansion due alkali-silica reactions (ASR). Improvement in reflectance and thermal conductivity resistance of white cement mortar having synthetic feldspar opens a wide range of building material applications.[+][-]