Cement clinker structure during plasma-chemical synthesis and its influence on cement properties

International Scientific Conference of Young Scientists: Advanced Materials in Construction and Engineering

材料科学;土木建筑工程;工业技术

Sazonova, N.^1 ; Skripnikova, N.^2 ; Lucenko, A.^2 ; Novikova, L.^1

Angarsk State Technical Academy, Department of Industrial and Civil Engineering, Angarsk

665835, Russia^1

Tomsk State University of Architecture and Building, Department of Applied Mechanics and Materials Science, Tomsk

634003, Russia^2

关键词: Cement properties;    Grindabilities;    Hydraulic cement;    Low temperature plasmas;    Mineralogical compositions;    Physicomechanical properties;    Saturation factors;    Thermal power plants;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/71/1/012018/pdf
DOI  :  10.1088/1757-899X/71/1/012018

来源: IOP

【 摘 要 】

The aim of this study was to determine the degree of influence of cement clinker cooling modes, synthesized in a low-temperature plasma, its structure and physico-mechanical properties. The raw mixture consisting of marble, sand, ash from thermal power plants and py- rite cinders were used, which are characterized by saturation factor (1,045); silicate (2,35) and alumina (1,22) modules. It was found that the use of different cooling rates of fused cement clinker entails changes associated with the mineralogical composition (increase of alite of 8.719,2 %), morphology (variation of the mineral alite aspect ratio of 6,7-17,5), density of the structure (change in distance between the minerals from 1 to 7,5 microns), grindability, specific surface area (2600-3650 cm2/g) and, in consequence, the activity of cement (56,973,2 MPa). Disorientation of alite mineral blocks against each other, a significant amount of microcracks, affect the increase in cement specific surface area of 14,3-21,6 %, which leads to activity growth of the system. Along with this, with the rapid cooling of the samples, alite 54CaO- 16SiO2-Al2O3MgO is formed, with single units of the structure, more deformed relatively to C3S, which has a positive effect on the hydraulic cement activity.