جستجوی مقالات مرتبط با کلیدواژه « سیمان پرتلند » در نشریات گروه « زمین شناسی »

Portland cement could be produced by heating the raw materials (clay, limestone) about 1500°C which clinker will be formed. Geochemical and mineralogical studies of clinker, Portland cement, cement kiln dust and cement mill dust have been carried out by optical microscopy, X-ray diffraction and X-ray florescence. In phase system diagram (CaO-Al2O3-SiO2), chemical components of clinker cement occurred in C3S-C2S-C3A triangular. Clays play important in adsorption of trace elements and heavy metals in the raw materials of cement factory of Neka. According to Bogue equation, this clinker and Portland cement coincide with international standard of cement. Cement kiln dust could be reuse as raw material of cement factory. Mineralogical study of clinker indicates the presence of calcium silicates and brown millerit minerals, while calcium silicates (tricalcium silicate and dicalcium silicate), gypsum, larnit, brown millerit and calcite minerals are indentified in Portland cement. Mineralogical study of cement kiln dust indicates the presence of calcite, quartz, muscovite –illite and chlorite minerals, while calcium silicates (tricalcium silicate and dicalcium silicate), gypsum, larnit and brown millerit minerals are indentified in cement mill dust.

Portland cement could be produced by heating the raw materials (clay, lime stone) about 1500°C which clinker will be formed. The geochemistry and mineralogical studies of raw materials, clinker, Portland cement and dust have been carried out by optical microscopy, X-ray diffraction and X-ray florescence. The results of spectrometry indicate the presence of calcite mineral in limestone, montmorillonite, quartz, calcite, albite, muscovite, hornblende, orthoclase and chlorite minerals in clays, hematite minerals in ironstone, quartz, plagioclase, tourmaline minerals in siliceous materials and gypsum in gypsum rock. ‍‍‍Calcite is the main mineral and quartz, muscovite –illite and chlorite are the minor minerals in the dust of the furnace of the Neka cement factory. The mineralogical study of clinker indicates the presences of calcium silicates and brown millerit minerals, while gypsum, larnit, brown millerit and calcite minerals are indentified in Portland cement. calcium silicates (tricalcium silicate and dicalcium silicate), and larnit are the main minerals and Gypsum and brown millerite (tetracalcium aluminoferrit) are the minor minerals of the dust in the mill of the Neka cement factory. In phase system diagram (CaO-Al2O3-SiO2), chemical components limestone and clays occur in carbonate rocks and tridymite respectively, While clinker and Portland cement occurred in C3S-C2S-C3A triangular. According to Bogue equation, this clinker and Portland cement coincide with international standard of cement.