Sand humanity long been used for construction purposes, without it just do not build a house.It is widely used in dry mixes that are sold in stores or as a component for preparation of cement slurries.Mortar sand used depending on its density, for example, certain types used to create masonry mortar, the other to produce a concrete screed.
Sand - a nonmetallic, with granular texture building material.Typically, a mixture of 0,14-5 mm grain size, which were formed during the destruction of natural rocks.There are several types of sand.They are characterized by distinct content of fine clay particles of dust or just elements.
purest of them, and the highest quality - it is river sand.Marine worse, since it is already a part of the salt, from which it must be cleaned.Career sand and mountain characterized by the presence of unwanted clay, and hence the quality of the product below.Sand generally has a composition: quartz, feldspars and silicates as impurities and of the same clay.
To characterize this building material there is such a thing as the density of the sand.It is estimated void ratio.For example, fine grade have index of 0.75.The density of construction sand, its quality is always determined by the presence of clay in it.Builders like to work with a unique purity - a product of the river.It has a density of 1.3 m. Per cubic meter.The density of the sand and clay content is already above 1.8 tonnes. In the same volume.
This material is the basis of many years of cement and concrete compositions.He is in great demand when laying roads at-blowing glass products and agriculture.
in the construction of fundamental importance to the concept of density, which is the ratio of the mass of sand to its volume, it has a measurement unit: g / cm3 kg / m3.Natural sand bulk density of 1300-1500 kg / m3.
for loose building materials, the figure is variable and depends on the degree of compaction.It is understood that the same amount of product takes a different amount.The density of the sand always depending on the humidity and any of its changes affect the bulk density.At higher moisture grains coated with a layer of water and accordingly the amount of sand increases dramatically.That is when the bulk density of sand humidity fluctuations into account when calculating the dose of sand in the required volume.If you do not take into account this factor, mortar will not have the necessary margin and the overall engineering design will substandard.
now mainly use the alluvial sand, it just extract - washing sand quarry.This is done as follows: a large amount of water out of it wash away the dust and clay.
sand density building depends on the structure of the grain.For example, the high rate of direct evidence that a part of his dense, very strong and hardy grain.This is the material with a high coefficient is indispensable for the construction in the permafrost.It is the basis of high-strength concrete, with excellent hardiness.
density of quartz sand in a loose condition characterized by an indicator of 1500 kg / m3, but can increase to 1700 kg / m3.It is characterized by the best hygienic characteristics and is washed and dry calcined natural material.When used in the construction are provided with high hygienic characteristics of the home.The density of quartz sand - a very important parameter that is taken into account during construction.
