Aggregate Surface Energy Testing via Static Drop Method

The patent applies preliminary action by performing surface grinding on aggregates before conducting the static drop test. This pre-treatment step modifies the aggregate surface to a standardized state, eliminating the variability caused by natural surface textures. By preparing the aggregate surface in advance, the method enables accurate surface energy measurement using the simpler and less expensive static drop method, thus resolving the contradiction between test cost and test accuracy.

The patent applies the copying principle by creating a standardized aggregate surface model through grinding. Instead of using the complex vapor adsorption method directly, the invention creates a controlled, reproducible surface state that can be tested with simpler equipment. This copying of the ideal test condition (smooth, standardized surface) allows the use of less expensive static drop methodology while maintaining accuracy comparable to vapor adsorption methods.

The patent applies parameter changes by systematically varying the grinding parameters (grinding time, pressure, abrasiveness) to achieve an optimal balance. The surface is modified to a standardized state that eliminates excessive texture variability while preserving enough surface characteristics to represent the aggregate material. This controlled parameter adjustment allows the static drop test to be performed reliably without completely destroying the aggregate's surface identity.