Cellulose Fibers will cause stabilize, strengthen and disperse homogeneously in the mixture and also will prevent drainage of bitumen in asphalt mixtures, which are known as cellulose fibers and are added directly to the mixer of the asphalt plant. It becomes a compound that retains bitumen in the mixture and will postpone the aging and fatigue of the asphalt, and the best conditions for its use, along with polymers, greatly improves the performance of asphalt.