Synthesis of Special Clinkers with the Use of Technogenic Raw Materials

Abstract

During research were developed ideas about the formation of C6A4MS phase in the aluminate clinker. The influence of the mineral and chemical composition of the raw mixture on the formation of C6A4MS was studied. Schemes of phase transformations providing synthesis of C6A4MS are proposed in this paper. Within research also have been studied the processes of hydration and hardening of aluminate phases. It was found that C6A4MS exhibits high hydraulic activity. Preference is given for the content of C6A4MS in aluminate clinkers obtained using technogenic materials.

A cement clinker formation with the use of magnetite scarn ores washery refuses

“…The cement production becomes a huge wastes consumer of various branches. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. An extensive group of man-made materials is intended for use as an iron-containing component of the cement raw mix.…”

“…An extensive group of man-made materials is intended for use as an iron-containing component of the cement raw mix. The overburden rocks, mining and enrichment wastes of various ores and coal, ferrous and nonferrous metallurgy slags, and ashes of thermal power plants serve as an important source of aluminosilicate raw materials [7,10,[12][13][14][15]. A lack of pure limestone deposits as well as their production when the longtime open-pit mining induce to use another available more often lowgrade raw materials.…”

“…Discussing the results. A polymineral composition of washery refuses of the skarn-magnetite ores has stipulated a step by step nature of the thermal transformation of the man-made component: 400-600 ⁰С is of pyrite and magnetite oxidation; 600-800 ⁰С is decarbonization of calcite, intensified by pyrite decomposition products; anhydrite formation; dehydration of actinolite, chlorite, epidote; 800-1000 ⁰С is the destruction of the crystal structures of the listed silicates, as well as scapolite, accompanied by an increase in the proportion of pyroxenes, garnets, and feldspar; 1000-1200 ⁰С is melting, amorphization [7].…”

Serpentinite Magnesium Binders, Based on Technogenic Raw Materials

“…The shortage of various binders' types and building materials, based on them, the low level of local natural and technogenic raw materials use can be solved as a result of the integrated involvement of technogenic materials in composite binders' production [8][9][10][11][12][13][14][15][16][17][18].…”

Mechanical and Thermal Properties of Magnesia Binder Based on Natural and Technogenic Raw Materials

“…The lack of a sharp boundary between decomposition of CaCO3 and MgCO3 is described as the major problem of magnesium binder production in several subsequent studies [1][2][3][4]. The negative effect of calcium oxide reduces the strength and water resistance of forming rock.…”