الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Geogrid is categorized as one of the component materials classified under geosynthetics that are used for soil stabilizing and reinforcing. Because of its higher strength-to-weight ratio, ease of handling, and comparatively low costs, geogrid has been gradually explored for possible use in concrete reinforcement. This thesis aims to assess the feasibility of using geogrids as a possible reinforcement for high strength self-compacted concrete slabs to provide additional tensile strength and ductility. Two types of geogrid surface modification methods to enhance the bond between geogrid layers and the cement matrix are introduced. Gluing sand to the geogrid surface as a physical surface modification method and immersion in polycarboxylate as a chemical surface modification method are investigated. The effect of geogrid type and number of layers are also investigated. Thirty-eight high strength self-compacted one-way concrete slabs were cast and tested under three-point load. Test results showed that the chemical treatment increased the ultimate flexural loading capacity of the tested slabs by nearly 8.5% for one geogrid layer and 13% for two geogrid layers compared to slabs containing untreated geogrid layers. This work extended to add geogrid layers to the slab’s steel reinforcement. Results showed that adding geogrid layers to steel reinforcement significantly increased the absorbed energy by nearly 740% for uniaxial, 600% for biaxial, and 506.5% for triaxial when compared to slabs containing steel reinforcement only. While, the cracking and ultimate loads decreased by nearly 16% and 18% for uniaxial, 28% and 27% for biaxial, and 29% and 26.5% for triaxial, respectively.