The sandy gravel is construction material which is used at construction of houses, improvement of personal plots, road construction. From the name it becomes clear that as a part of such mix there is gravel and sand.
Types of sandy gravel
The sandy gravel represents nonmetallic material which is extracted in pits and at the bottom of reservoirs. Gravel and sand in this mix contain in equal proportions. It is possible to allocate the natural and enriched sandy gravels.
The enriched mix has to be familiar to any experienced builder because it is applied mainly in construction jobs. And here natural mixes are more often used for road construction, sports grounds, for tamper under the site before garage. The main advantage of natural mix is availability of several standards. For example, only crushed stone can be applied in five fractions. As a part of the enriched mix surely there are mineral mixes which increase its technical parameters and cost. It turns out that natural mix is much more economic.
Depending on education conditions the sandy gravels are subdivided into lake and river, sea and mountain and ravine. As a part of lake and river mix there are grains of more rounded form and specifics of granularity at it uniform. However, it quite often is strongly polluted by organic impurity. As for sea sandy gravels, they are characterized by okruglookatanny grains and availability of fine-grained fractions. And at mountain and ravine mixes there are always residues of maternal rock. Also they differ in acute-angled form of grains of various fineness.
Properties of sand-gravel mixes
The sandy gravel is eco-friendly material. Also it differs in durability and resistance to negative temperatures. Application of large fractions of crushed stone allows to try to obtain similar indicators. By the way depending on the sphere of use the content of gravel and sand can change. Sand-gravel mixes differ in durability and perfectly keep the properties at long storage. Even through very long time this material can be used quietly as it does not lose the qualities over time. After completion of the main construction jobs it is even possible not to think of need of export of the remains. At addition of mix in concrete it is possible to achieve improvement of its characteristics. One more advantage of sandy gravel is its low prime cost. That is why it is demanded practically at any construction jobs.