Energy characteristics of finely dispersed rock systems

21st International Scientific Conference on Advanced in Civil Engineering "Construction - The Formation of Living Environment"

土木建筑工程

Sokolova, Yulia^1 ; Ayzenshtadt, Arkady^1 ; Frolova, Maria^1 ; Strokova, Valeria^2 ; Kobzev, Vadim^2

Northern (Arctic) Federal University Named after M v Lomonosov, Severnaya Dvina Emb. 17, Arkhangelsk

163002, Russia^1

Belgorod State Technological University Named after v G Shoukhov, Kostyukov str., 46, Belgorod

308012, Russia^2

关键词: Chemical compositions;    Critical surface tension;    Dispersion interaction;    Electrostatic charges;    Energy characteristics;    Genetic classification;    Physical and mechanical properties;    Rock-forming minerals;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/365/3/032036/pdf
DOI  :  10.1088/1757-899X/365/3/032036

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

In their genesis, rocks accumulate their energy potential - free energy of rock-forming minerals and the rock in general that is an important criterion of raw material genetic classification for construction materials production. The free energy value for the macrostate of a substance (rock) is atomization energy. The critical surface tension value can be used as an energy characteristic for destroyed rock in a finely dispersed state. If condensed phase surfaces carry no significant electrostatic charge, then main surface forces that determine the interaction between solids are dispersion ones evaluated by the Hamaker constant value. These energy parameters can enable forecasting various physical and mechanical properties of minerals and rocks and thereby increase the efficiency of construction materials production where synthesis is based on the complete rock destruction. Since compared chemical compositions of minerals forming rocks revealed a predominant silicon dioxide content in them, the aim of this paper was to establish a possible relationship between the silicon dioxide content and energy characteristics for finely dispersed rock systems of various genetic types. The selected objects of research were different genesis rocks typically used in the construction materials industry and quartz as a main rock-forming mineral. Test samples of rocks in a finely dispersed state were obtained by dry milling. It is established that an increase in silicon dioxide content in the limestone - quartz series leads to higher atomization energy, specific mass atomization energy and free surface energy with intensified dispersion interaction between particles evaluated by an increase in the Hamaker constant.