In this research, at first, inorganic powders including pine cone ash, micronized silica and alumina were coated with oleic and stearic acid in technical grade solvents including ethanol (96%), toluene, and acetone under heat treatment. Then, different amounts of each coated powders and their mixtures were used to modify the bitumen samples. Different properties of the modified bitumens including penetration rate, softening point, dynamic shear rheometer (DSR), bending beam rheometer (BBR), and multiple stress creep recovery (MSCR) were compared with the pure bitumen sample. The results of the penetration tests showed that this parameter is improved for some modified bitumens compared to the pure bitumen sample. The lowest penetration value was observed in 2% silica coated with stearic acid, indicating a high interaction of this modifier with the pure bitumen. It was also observed that the penetration degree is increased with increasing of the percentage of the coated additives for all samples. In addition, the softening point of the pure bitumen sample has no significant change with addition of the coated powders. This phenomenon is an advantage in the modification of bitumen. The lowest softening point was found in 6% pine cone ash sample coated with stearic acid at 46.8°C and the highest value was observed for 2% silica coated with stearic acid at 50.7°C. According to the DSR results, the maximum total shear stress modulus (G * ) at three different temperatures is observed for the silica sample coated with oleic acid. It seems that using more percentage of the silica coated with oleic acid to reach a maximum total shear stress modulus in the modification of bitumen is an appropriate method. The results of BBR tests, to investigate the cracking phenomenon at low temperatures, showed that the maximum creep hardness at -6°C was related to 4% silica coated with oleic acid, whereas the minimum value at -12°C was for 2% pine cone ash coated with stearic acid, which significantly increased the creep hardness. The MSCR results of bitumen elasticity indicated that the maximum recovery percentage in a stress of 100 Pa was observed for 2% silica coated with stearic acid, and minimum value was for 4% pine cone ash coated with stearic acid. Also, the minimum value of irreversible elongation at a stress of 100 Pa was observed for 4% pine cone ash coated with stearic acid, and in a stress of 3200 Pa, the minimum value was for 2% silica coated with oleic acid.