This paper presents a United Atom (UA) force field for simulating hydrocarbon molecules in bituminous materials. integrating explicit hydrogens into beads with their parent atom. This method simplifies all-atom molecular models. significantly accelerating Molecular Dynamics (MD) simulations of bitumen by 10 to 100 times. https://www.redeturismobrasil.com/product-category/autographed-framed-football-photos/