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.

The problem of erosion control and sedimentation in rivers has long been considered by humans. Every year a large number of bridges and flood in the river, at a time when they are most needed, are destroyed. One of the most effective agents of this destruction, scour around the base of the bridge, which creates a lot of human and financial losses. vanes submerged and non-submerged, structures that are at the bottom of the river with an angle to the main flow and in order to prevent the erosion of as rivers and screws and the base structure and morphology of the water and the river bed are correct. The secondary vortex structures cause's changes in the flow pattern of the river bottom sediment and erosion are the result of the transition. System, number, space, geometry and angle of the screen can be effective in the sediment of the front legs. Understanding the flow field plates can help engineers to better use them in rivers. So, in this thesis examined the effect of submerged vanes on the cylinder of the river has been using the software SSIIM and in this regard the placement of three vanes is studied in this research.

Rivers have a prominent role as one of the most important water resources that are constantly evolving. Therefore, recognition of the behavior and morphology of rivers, which is influenced by factors such as river form and structure, river geometry, bed shape, flow flow and characteristics of the river profile, is of particular importance in river engineering designs. These effects are very important in the meander rivers where there is an uneven flow in terms of velocity changes, shear stresses, water surface digits, and so on. In this research, an interval of the Karkheh River with an arch was selected. Then, the depth of water and the speeding were measured in three sections (input, arc and output) by field operations. In the following, using the two-dimensional model of CCHE2D flow, the daily flow of the river was modeled in non-sustained conditions in 2014. The results of this study indicate that the use of the CCHE2D model is efficient in simulating the flow pattern of the river.