cpi
Current Issue Flipbook

Trade Journals for the Concrete Industry

Current Issue Archive Online Flipbooks CPI Middle East CPI TV Events Buyers' Guide Newsletter Advertising Subscription
Suchen

Solar Reflectance Index (SRI) of Concrete


Optical Characterisation of Concrete for Heat Island Mitigation

 


With the aim of reducing the cooling energy demand of buildings and limiting the urban heat island effect, the optical properties of building materials such as roofing and pavers are taken into account in the U.S. American LEED® Green Building Rating Systems. According to the ASTM E1980-11 standard, opaque roofing or paving materials which are installed horizontally or at a low tilt angle can be characterised by the so-called “Solar Reflectance Index – SRI”. It is calculated from the solar reflectance (SR) and the thermal emissivity, and is a measure for the relative heating of such materials when absorbed solar radiation and heat emitted to the atmosphere are considered. The paper illustrates why the SRI value of surface-covering materials is significant for urban climates. It will also present the derivation of the SRI value from measured reflectance spectra, SRI examples for concrete pavers of differing colours and correlations with other quanti- ties which can be derived from the reflectance spectra, such as solar and visual reflectance.

Show article
Download article
 


Contact

Fraunhofer-Institut für Solare Energiesysteme
Heidenhofstr. 2
79110 Freiburg i. Br., Germany
www.ise.fraunhofer.de

Betonverband Straße, Landschaft, Garten e.V.(SLG)
Schloßallee 10
53179 Bonn, Germany
T +49 228 9545621
F +49 228 9545690
slg@betoninfo.de
www.betonstein.org


CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

About us
Contact
ad-media GmbH

Industriestrasse 180
50999 Cologne
Germany

T: + 49 2236 96 23 90
F: + 49 2236 96 23 96
info@ad-media.de

Links
  • Magazine
  • CPi-tv
  • Events
  • Buyers' Guide
  • Newsletter
  • Advertising
  • Patents
  • ad-media GmbH
Social
  • Linkedin
RIGHTS
  • Imprint
  • Data Protection
 
We are using Cookies on www.cpi-worldwide.com. Some of them are essential, while others help us improve this website and your experience. More information can be found in our privacy policy. Accept all Extended Configuration
Essential
Cookies of this category are required for the basic functions of the website. They are used for safe and proper use and therefore cannot be deactivated.
Functional
Cookies of this category allow us to analyze (Google Analytics) the use of the website and measure performance. They also help us to provide useful functions.
Third-party
Cookies of this category allow us to show third-party content (social networks, videos)
Save settings and close Accept all