atural bitumen: Petroleum is squeezed by the earth's crust for a long time in nature and comes into contact with air and moisture. Its light oil content gradually evaporates, and the petroleum bitumen formed by concentration and oxidation is often mixed with a certain proportion of minerals. Natural bitumen can be divided into lake bitumen, rock bitumen, submarine bitumen, oil shale, etc. according to the environment in which it is formed.
Rock bitumen is an bitumen-like substance derived from ancient petroleum seeping into the cracks of rocks, and after hundreds of millions of years of deposition, change, adsorption, and fusion, under the combined effects of heat energy, pressure, oxidation, catalysts, bacteria, etc.

Rock bitumen modified bitumen uses rock bitumen as a modifier and is blended with matrix bitumen according to a certain blending ratio. The modified bitumen is produced through processes such as mixing, shearing, and development. It is referred to as NMB.
Rock bitumen modified bitumen mixture is a mixture produced by a "wet" process based on "rock bitumen modified bitumen" or a mixture produced by a "dry" process based on "rock bitumen modification".
"Dry method" process "Dry method" process means that after pouring the mineral materials into the mixing pot, the rock bitumen modifier is added to the mixing pot and mixed with the mineral materials dry for a certain period of time, and then sprayed into the matrix bitumen for wet Bitumen mixture mixing process.
“Wet method” process “Wet method” process means that the rock bitumen modifier and the base bitumen at a certain temperature are first mixed, sheared, and developed into the finished rock bitumen modified bitumen, and then sprayed into the mixing pot to mix with the ore. Bitumen mixture mixing process.