Frictional resistance of coal dust fouled uniformly graded aggregates

Abstract

Modulus (DSM) of uniformly graded gravel aggregate were investigated. The results show that at increased coal content, the DSFA of the gravel tends to the DSFA of the coal. The rate of decrease of DSFA was dependent on the moisture content of the coal fouled gravel. The DSIFA was higher than the DSFA at any degree of coal fouling. The DSM at small displacement was more sensitive to changes in moisture content of the fouled gravel than friction angles and is thus a better indicator of coal fouling effect.