The use of various additives including polymer additives to modify the properties of bitumen used in road pavement construction was crucial for researchers to use modified bitumen in the asphalt significantly increased pavement and operational life of them. Accordingly, in this study the effect of lignin derived from waste paper companies Chukka (Wood and Paper industries of Iran) on the performance of bitumen based on laboratory practices have been investigated. Lignin including natural polymers that in the paper production process must be separated from the texture of wood, so papermaking waste treatment plants to be found in large quantities. In this study different weight percentages of lignin polymer (3, 6, 9 and 12%) has been mixed with bitumen 60-70 Isfahan refinery and its impact on the various properties of bitumen was studied. Add this polymer improves the performance characteristics of the bitumen at high temperatures. Increasing lignin reduces the penetration grade, increase viscosity, increase rotary viscosity and softening point of bitumen. Also by increasing lignin, bitumen thermal sensitivity is reduced which indicates better performance is bitumen for road construction.

The main network of roads of the country is asphalted pavement. Finding a way to improve the technical properties of asphalt has attracted the attention of experts in recent years. Nanomaterials can be used to improve the technical properties of asphalt. On the other hand, fibrous materials can also be used to arm the asphalt mix. In this context and in this article by adding different percentages of nano-carbon black marshall experiments, analyze data and plot it was noticed that the addition of these additives increases the resistance of marshall and decrease of flow. On the other hand, resistance was increased by adding industrial polyester fibers to asphalt mixtures and in low percentages. Psychosocial rose as the percentage of industrial fiber polyester increased. Other results also changed. Economically, the results indicated that the use of fibers in general is preferable to nano-materials and its use in asphalt mix is recommended. Finally, by comparing the results, it was concluded that the blend containing black nanocarbon is more rigid than the mixture containing industrial polyester fibers, and it can be used in the regions with tropical weather and so much traffic and with more traffic and limited use.