Study of melt amount influence on the expansion degree of expanded clay gravel

Abstract

The influence of the amount of optimal composition eutectic melt on the expansion degree of expanded clay granules was studied. Expanded clay of the Smyshlyaevskoye field was used as the main raw material. Waste from Togliatti enterprises was used as corrective additives: burnt earth of the steel shop, iron foundry waste, and foundry waste of VAZ. The study applies experimental data on the average density of the studied compositions and a method to calculate the amount and composition of the melt formed in ceramic masses at firing and a software package for evaluating mineral raw materials. The dependence of the average expanded clay gravel density on the amount of the optimal composition formed during the melt firing is established. The obtained data can be used for directional adjustment of the compositions when obtaining the aggregate of the required expansion degree, as well as for plotting the isotherms of expanded clay gravel density on the (R, R2) O - Al2O3 - SiO2 diagram, which will make it possible to predict the expanded clay density from the location of the raw materials.