Concrete Floor Reflectance

It can be important to maximise the light reflectance from an exposed surface for example to reduce the artificial lighting requirement.

Concrete floor reflectance.

Lighter colored materials such as concrete generally have a higher solar reflectance. They reflect heat from the sun and do not warm the air very much. Reflectance values for aged weathered or abraded concrete surfaces were affected by the reflectance of. Measuring the reflectance of floors for big box retail stores it s not only the levelness and flatness of a floor that counts it s also the ability of a floor to reflect light that matters.

Light reflectance value lrv is a measurement used to inform how much light a color reflects and how much it absorbs. An as struck smooth grey portland cement surface may have a reflectance of 40 cibse although this will reduce if the surface is mottled or discoloured. Bright shiny and polished concrete floors look much better than a dull and dreary surface. Before the floor was dark typical of a steel troweled concrete floor and it was gouged by forklifts refracting instead of reflecting the light.

Using concrete mixtures with sufficient mixing water however the investigators reported. Concrete does a very good job of reflecting solar energy. Reflectance values for 25 week old concrete produced with white and gray cement were 0 68 to 0 77 and 0 41 to 0 52 respectively. Once the concrete slab was ground this dark top layer is removed exposing concrete that is lighter in color because it has not been burned by trowel machines.

The scale ranges from 0 to 100 with 0 being.