The spectral reflectance is generally very low and hydrocarbon constituents determine the absorption processes. 5.2.1 Reflectance. Albedo, or solar reflectance, is the ratio of reflected solar radiation to the total amount that falls on that surface, known as incident solar radiation. Richard G. Lett, Thomas C. Ruppel, in Encyclopedia of Energy, 2004. Light reflectance value (LRV) is another measure similar to reflectance commonly used by paint manufacturers and interior designers. high-reflectance asphalt materials and pavement surface treatments that (1) are suitable for use in parking lots and other large paved surfaces; (2) have a minimum SRI of 29; and (3) are economically viable. The surface is completely sealed with asphalt mix. In this study, six technologies exhibited SRI values of 29 or greater. Shedding Light on Shedding Light on Concrete’s Reflectivity Technical Fact Sheet Prepared by The National Ready Mixed Concrete Association “Typical concrete has a higher reflectance value than asphalt, along with a smoother, more reflective texture. Albedo values range from 0, for perfect absorbers, to 1, for perfect reflectors. The Effect of Pavement Material on Road Lighting Performance S. Fotios1, P. Boyce2 and C. Ellis3 1School of Architecture, University of Sheffield 2Independent Consultant, 60 Riverside Close, Bridge, Canterbury, CT4 5TN 3Faculty of Development and Society, Sheffield Hallam University October 2005 This work was carried out by Sheffield Hallam University under contract to While the absolute value of the near-infrared reflectance factor varies dependent on asphalt type and wear, its slope shows typically only slight variations; nevertheless, one asphalt differs significantly from the others. Many paint companies are now providing the LRV for each color of paint for this purpose. In addition, the light reflectance value of a material is also used to calculate lighting requirements for a room. Instead of a factor, LRV is given on a scale from 0% to 100%. High LRV material on ceilings, floors and walls help reduce lighting requirements by reflecting existing light, either from light fixtures or daylight. 7 Stair Edging Skirting Permission to reproduce extracts from BS 8300-2:2018 is granted by BSI. In pavement structures, the topmost surface is the only layer which affects albedo. The reflectance is the proportion of directly incident light, conventionally expressed as a percentage, that is reflected from a plane polished surface, usually under oil-immersion, and under specified conditions of illumination. The minimum reflectance is near 350 nm with a linear rise towards longer wavelengths. - Light Reflectance Value (LRV) of a surface - method of test LRVs should be considered when specifying: Flooring Accessories Stair Edgings Wall Protection Dual Rail High Impact Corner Guards Wall Guards Kick Plates Matting Primary Barrier Matting Secondary Barrier Matting Carpets Carpet . It is defined in BS 8300:2009+A1:2010 as the total quantity of visible and useable light reflected by a surface in all directions and at all wavelengths when illuminated by a light source. ultraviolet light (5%).

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