NEWPAVE corporation manufactures various asphalt modifiers needed for production of modified asphalt concrete mixtures. This mixture is used to construct the surface layer of durable asphalt pavements which strongly resist against rutting and fatigue cracking problems. The asphalt modifiers produced are put into a PE-film bag, and each bag contains the modifiers corresponding to produce one ton of modified asphalt concrete mixtures. When aggregates and asphalts are mixing in the pug-mill of the asphalt concrete plant, the proper numbers of the modifier-bags are thrown into the pug-mill. The bag and the modifiers are melted instantaneously due to high temperature and shearing action, and they are mixing homogeneously with asphalt binder to be modified asphalt binders. Then, this modified binders coat all aggregates during mixing in the pug-mill to produce modified asphalt concrete mixtures. This mixture is the very material for paving the surface layer of durable asphalt pavements. The attached picture represent one of the typical asphalt modifiers contained in a PE-film bag developed in the NEWPAVE Corporation. The kinds of asphalt modifiers produced are PBM-durable, PBM-porous, PBM-cold region, PBM-bridge surface, PBM-100% RAP recycling, PBM-heavy traffic modifiers, etc.