Features of large sand and its scope

Sand is considered one of the most frequently used materials in construction, it is also widely used in the household, in production, in educational and even therapeutic purposes. Bulk material is famous for unique properties, composition and variability of fractions. The coarse natural component has a number of features, thanks to which is very popular.

Properties

Natural material is formed due to the combination of minerals, rocks. Particles have different size, do not glue. Large sand can be found in a quarry or on the bottom of the reservoirs. There is also an artificial method of mining natural material using crushing rocks, for example, quartz. Therefore, the following types of material that are named.

  • Career. Peschins have an uneven surface. Such a material occurs significantly more often.
  • River. Peschins are characterized by a smoother surface, have a lot of weight and therefore quickly settle on the bottom. Such a material is less common and costs more.
  • Quartz. Peschinki is distinguished by a flat surface, have the same size. The substance has reliable operational qualities. Characteristics of the quality of the coarse-grained substance are determined by the presence of various impurities, for example, clay, pebbles, dust, rubble. The cleaner of the sand, the higher the quality, and the more expensive it is.

            It should be noted that in the river sand impurities are less common. In any case, bulk material is purified by sieving, washing or using modern technologies.

            The dimensions of grain fractions are measured in size modules.

            • Coarse material where the size module ranges from 2.5 to 3.
            • Material of increased size, where the indicator exceeds 3.

            There are two grades of sand, which differ in the indicator of the presence of branches of different sizes and impurities. The density of the substance depends on the size of the inner cavities between solid particles. Distinguish the following types of density.

            • Real. This indicator is applied in practice. It is taken into account when using sand in various fields. The type of sand is influenced by the type of sand, the size of the fractions, the presence of impurities. Determine the exact indicators are quite difficult. The fact is that the indicator of the humidity of the substance affects the proportion. The greater the humidity, the higher the density.

                It should be noted that the volume of substance in the wet state changes to about 14%. Also on the density indicator reflects the type of occurrence of the substance. Sand can be naturally lying, be saturated, or be under water pressure.

                • Conditional. This indicator is determined in laboratory conditions using complex methods. The figures obtained differ in the most side of the real density. The physical parameters of the sand include such.
                  • Ability to maintain their properties at low temperatures.
                  • Roughness that ensures clutch reliability in solutions.
                  • Ability to increase in volume.
                  • Low radioactivity, allows the use of material in any spheres.

                Requirements

                Coarse sand differs in many characteristics. When using material in a particular industry, a set of qualities that must meet certain requirements are required. Therefore, the following state standards were developed.

                  GOST 8736-93

                  This standard corresponds to the substance mainly with large branches having a rough surface. Such sand is distinguished by high frost-resistant indicators. Grain size no less than 2.6 mm module. Allowed impurities to 9%. Substance has a gray.

                  The material is intended for work in heavy industry. With it you can fill in concrete. In road construction such sand can be part of asphalt and other bulk substances. Also allowed in monolithic production.

                  For finishing works, such sand is not intended, as it contains a large number of varied impurities.

                  GOST 22856-89

                  This standard corresponds Local substance having large and small branches with a smooth surface. Such material is obtained by crushing natural rocks or from river ducts. The substance is characterized by high quality. The size of grains vary from 2.2 to 3 majority modules. The presence of impurities is 0.5%. The substance may have shades of golden, yellow, gray.

                  Sand for this quality applied As a component of the element of bricks, plasters and other components used in construction or decoration. However, when working, it is necessary to constantly mix the mixture, since smooth particles are quickly settled to the bottom.

                  In the manufacture of bulk material it is very important to comply with the required quality standards. This greatly facilitates the work and ensures reliability, the durability of the result.

                  Choice

                  The choice of one type of sand is determined by its appointment, economic substantiation. For example, the manufacture of concrete is more suitable for river sand. Material does not require careful washing. Provides resistance to moisture, temperature differences. However, it should be understood that Definitions of the type of bulk substance are not enough to obtain the desired result.

                  In this case, it is important to pay attention to the brand of concrete. For each brand there are permissible grain size. For example, for the M200 brand concrete and the fractions are approached from 1 to 2.5. For brands M350 and above fit fractions from 2.5 to 3.5. When bookmarking the foundation, fractions from 1.5 to 3.5 are applied.

                  It is important to understand that the quality of the concrete depends on the number and composition of the sand.

                  Career sand can also be used, But only after careful washing. As a rule, it is used in order to save, when there are no high requirements for the result. Due to the presence of a large number of additional impurities, the material is not capable of ensuring sufficient structural strength. Therefore, it can only be chosen if large loads are not supposed.

                  Quartz or gravel type of material are obtained by artificially. This requires significant financial, labor and time costs, so from an economic point of view it is unprofitable. Such a type of sand is more likely to prefer when making a landscape. This is due to homogeneity, flatness of the surface of the grains.

                  For any finishing works, manufacturing production mixtures, brickwork, tiles are recommended to choose a material with a minimum amount of impurities. For this suitable river sand. The use of a career type of material is allowed in industrial production or where there are no strict requirements for strength, the stability of the final product.

                  With an independent selection of sand, the composition, characteristics, compatibility with other components of the mixture should be carefully examined.

                  This is a pretty important point, so you should not neglect the recommendations of specialists. This will help get the required result without significant losses.

                  Application

                  Sand consisting of large grains is a natural, eco-friendly material. He misses air and moisture. therefore It is used as a drainage, natural antiseptic.

                  In construction, large sand Indispensable when erecting a reliable foundation of the house. Without his help, it is impossible to cook high-quality strong concrete. Sand is used For the preparation of cement screed, plaster for walls or for finishing finishing works.

                  Material is the basis of all roads, asphalt or tiled. Natural component is necessary In the production of bricks, block structures. Due to the fact that the grains are not binding to water, They are added to various solutions. With this, it seeks the smallest shrinkage.

                  Many dacms are beautiful smooth grains as a decoration of the site. Of these, you can make it possible to make small pedestrian walkways or decorative hills.

                  Proper use of large sand will provide the desired result, which will delight for many years.

                  How to choose sand, look in the following video.

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