Jung Huh

By Jung Huh

This chapter deals with the first attempt to derive a scientific, revolutionary, hot mix asphalt design method. The full rutting equation was derived as a function of the damage wheel pass number (N_d) in the previous paper by Huh. Since N_d is hard to measure, the single stroke breakdown energy (W_1d), is disclosed to replace N_d. By using this W_1d, new performance equations are proposed as a function of the W_1d. The effectiveness of the new linear performance equation derived is experimentally validated. These performance equations in the form of master equations could constitute a scientific, rigorous, hot mix asphalt design theory. Since the formulation of master equations requires much effort and time, a simple design variable representing master equations is proposed as a design variable. This is an important discovery in this paper. Comparison of the suggested variable (W_1d) among various asphalt mixes can predict both rutting and fatigue cracking simultaneously. It is hoped that this noble HMA design method can be a promising alternative for currently available empirical methods like Marshall, Gyratory Compactor, Indirect Tensile, BMD, etc. to obtain a better design value.

Part of the book: Asphalt Materials - Recent Developments and New Perspective [Working title]