Production of building materials based on siliceous rock

Silicon breeds can be an excellent alternative to the manufacture https://gamblingsitesnotongamstop.co.uk/curacao-casinos/ of such types of building materials as ceramic brick, light aggregates for concrete and similar.
Sedimentary and volcanic-sedimentary silicon rocks consist of dumps (diatomites, spongolites, etc.D.), Rights and trembling. The mentioned siliceous rocks are mainly three -component minerals. Along with the siliceous component, clay material is certainly present in them. In conventional diatomites, grances, trepels, the silica content (capal-crristobalite) ranges from 60 to 80%, clay material-from 10 to 40%. In clay varieties, the clay content rises to 30-60%. As usual impurities in different quantities there is also quartz, glauconite, etc.D.
Silicon breeds are porous materials, since sintering and the shrinkage occurring only partially reduce the natural porosity of the sedimentary rock in conditions. If the sintering process is finished, you can get a glassy, almost ill -sized mass. The experience of sintering indicates the possibility of regulating porosity, volumetric mass and strength of the burned breed. The sintering process that occurs during the firing of various rocks is one of the main in the technology of ceramic production. The most important properties of products: strength, hardness, frost resistance, acid resistance, refractoryness increase with increased sintering.
When firing siliceous breeds, the sintering process occurs at a relatively low temperature (about 800 ° C). The phenomenon of the winding is pronounced at a temperature of 1200-1300 ° C. In some cases, the interval between sintering and melting 50-70 ° C. To understand the sintering process, it should be borne in mind that fine-grained siliceous rocks have high porosity (25-55%). By origin, they are polymineral, granulometric – relatively homogeneous. Therefore, there is a reason to equate the studied siliceous rocks with the thin -colored attached masses and transfer the patterns revealed when firing these masses. The process of sintering of silicate rocks can be considered as a silicate system in which SIO2 prevails in the form of a refractory opal with a melting temperature of 1660 ° C and there are in small quantities more alloy -melting oxides AL2O3, Fe2O3, CAO, MGO, NA2O, etc.
Analysis of the processes of sintering of siliceous rocks and the research of the phase composition, the obtained firing products indicate that these materials are glass -ceramic, in the phase composition of which silicate glass prevails with an admixture of artificial minerals available in a number of ceramic materials. When sintering, solid-phase silicate reactions are observed, accompanied by a complex of physico-chemical processes of the interaction of amorphous SIO2 with various oxides.
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