الفهرس Only 14 pages are availabe for public view
 |  | from | 201 |  |  |
| | | from | 201 | | |
Abstract
Since normal concrete is subjected to bleeding and segregation during casting process, vibration is necessary for compacting especially in reinforced concrete section with dense reinforcement ratios. So that self –compacted concrete (SCC) has good properties compared to normal concrete, it is compacted under its own weight. Self –compacted concrete is a new generation of special concrete, where no inner or outer vibration is necessary needed for compaction. The main objective of this research is to determine the behavior and strength of fiber reinforced self-compacting concrete under flexural load. the behavior of FSCC under impact load also was investigated. Different types of fibers will be used in this thesis such as ( steel fiber – polypropylene fiber ). The maximum content fibers used in self-compacting concrete will be investigated in fresh state. Initial cracks, width of cracks, depth of cracks and maximum work done for this beams under impact load can be noticed. The study will also include a comparative study of the mechanical properties for the fiber reinforced concrete and SCC concrete. The results of the investigation have shown that:- By increasing the percentage of ( steel – polypropylene ) fiber decreases the (flow diameter & flow time) in slump and J-Ring test ,Also increase the flow time in V-Funnel test. The homogeneity of fiber self–compacted concrete depends on combinations of several factor including type of aggregate ( dolomite ) grading of aggregate , water contents dosage of supper plasticizer and dosages of fiber. For the steel fiber self–compacted concrete compressive strength and tensile strength was higher than polypropylene fiber self–compacted concrete. For the steel fiber self– compacted concrete compressive strength and tensile strength was higher than polypropylene fiber self–compacted concrete. the width of the cracks of the tested beam which contain polypropylene fiber is smaller than width crack of the beam which contain steel fiber and smaller than width of crack of the beam SCC without any fiber.