Albedo Of Granite

The albedo of different surfaces.

Albedo of granite.

As increasing the albedo is a strategy to improve thermal comfort santamouris et al 2012 wang and akbari 2016a the amount of albedo has changed to 0 7. The current situation pavement is composed of granite with albedo of 0 4. Learn more about the properties and uses of granite in this article. It is the most common plutonic rock of the earth s crust forming by the cooling of magma silicate melt at depth.

High albedo pavement ha scenario. Black and red rock granite albedo 0 19 3 white rock plagioclase albedo 0 49 and 4 gold and white rock chert iron impurities albedo 0 55 levinson 2001. Gray type i ii portland cement left albedo 0 32 and white type i portland cement. Light granite scored best in the measurements during the 6 months of testing.

The amount of incoming radiation which is reflected from the earth albedo has an important bearing on the earth s response to climate change. Granite is a highly attractive durable and easy to care for stone that will transform your home for the better. The albedo of dark coloured wet and very rough soils ranges between 0 05 and 0 15 while the albedo of light coloured dry and smooth soils varies between 0 35 and 0 40 dobos 2006. Granite coarse or medium grained intrusive igneous rock that is rich in quartz and feldspar.

It is well known that it is particularly high on reflective or white surfaces for example snow. A low grade granite slab is a thinner cut usually about 3 8 inch it usually requires a piece of plywood backing for more strength. Table 1 the approximated ranges of albedo of natural surfaces natural surface types approximated albedo blackbody 0 forest 0 05 0 2 grassland and cropland 0 1 0 25 dark colored soil surfaces 0 1 0 2 dry sandy soil 0 25 0 45 dry clay soil 0 15 0 35 sand 0 2 0 4 mean albedo of the earth 0 36 granite 0 3 0 35 glacial ice 0 3 0 4. This low grade granite is usually imported from china and sold through granite liquidators big box stores or cut into tile.

The measure for this is the albedo which also provides information about how much a surface warms up. The albedo from the latin for white of the planet is an important feedback mechanism as extra ice can increase cooling or reduced ice can lead to warming. Incorporates both solar reflectance and thermal emissivity in a single value. Sri measures the roof s ability to reject solar heat defined such that a standard black reflectance 0 05 emittance 0 90 is 0 and a standard white reflectance 0 80 emittance 0 90 is 100.