Technical characteristics of expanded clay , you need to know

main technical characteristics of expanded clay

As is known, is much warmer than in homes of brick than concrete.Property clay sprayed with high temperatures, is that it becomes a very poor conductor of both heat and cold.Expanded clay has the same property of a few more, thanks to its porous structure.But how high is its thermal conductivity?If you wish to use this material as a thermal insulation, this issue should be interested in you in the first place.We hasten to please you - the thermal conductivity of expanded clay is quite small and is 0.12 W / mK.However, note-size fractions, the curve in a porous sand with a particle diameter of 0 to 5 mm is not even considered.

Among other things, concrete block has several properties that make and gained popularity so quickly some homeowners and builders.Firstly, it its strength. When tested in compression granules mutually destroyed only 13% of the volume, thus creating additional sealing layer .The dense styling without the impact load reduces volume by 7%.Other technical characteristics of expanded clay is also important.For example, the material is absolutely not afraid of water.In conjunction with the frost it can count on the durability of the filling.With regard to the quality of the radiation, so exciting today all concrete block completely neutral, making 200-240 Bq / kg.

What is the density of expanded clay, and how important is this parameter?

bulk insulation can be used in walls, floors or even the roof, but it is important to know how tight will blow when using this or that faction.Expanded gravel from burnt fusible clays has about a dozen brands, each of which defines a bulk density of expanded clay.But, often, under various sizes of granules real figures are even smaller than required.In particular, the mark for M450 fractions 10-20 millimeters have a density of 430-440 kg / m3, and M500 - total from 460 to 470 kg / m3.For expanded clay sand mark set by higher rates.Thus, the M800 has a bulk density in the range 740-760 kg / m3.

The ratio of the largest to the smallest granules in the same batch of expanded clay should not exceed 1.5, the increase of the value of at least 2 grains reduce the strength by 27%.

quality of the material is of considerable importance because it determines the form of fractions.Ideally, they should be spherical, in which case the triangle centers are stacked grains are equidistant from each other.So it is possible to distinguish high-quality expanded clay, whose properties are determined by a uniform arrangement of pores, completely closed.The sawing such granules can be seen pronounced glassy wall voids, perfect, without violating integrity.A similar structure and high durability due to the grains of expanded clay gravel, and obtained from him by crushing rubble has an angular shape and the quality of its much worse.

volume and proportion of expanded clay - important characteristics

Since any bulk insulation occupies a volume, it is easy to calculate how many cubic meters will be needed to improve the thermal insulation of ceilings, walls or roof slopes.However, it is also desirable to know the volume or proportion of expanded clay, which, in fact, one and the same.The difference is only observed when comparing the different sizes of the material. Ideally, the proportion of expanded grain is 0.95 g / cm3 .It is achieved at a temperature of 1250 degrees, with the interval since the swelling granules to surface fusion must not exceed 50 degrees.

volumetric weight depends on many factors.First, it is the amount of grain, for example, a cubic meter of pellets value of 20 to 40 millimeters will weigh about 350 kilograms and expanded sand fraction with a diameter of 0-5 mm - 600 pounds.The important role played by the raw material, as clay can be heavy and light.Stamps identical in size but different in weight of granules are distributed on the composition of clay.Sometimes transport over long distances of expanded clay with a bulk density of 350 kg / m3 more profitable to manufacture the same material near the point of use, if in the latter case, the weight of a cubic meter exceed 600 kilograms.