الفهرس 
CHAPTER (1) INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
A large partial replacement of Portland Cement (PC) by ground granulated blast furnace slag (GGBFS) is an effective method to improve the strength and the durability of concrete due to its lower diffusivity and higher chemical resistance compared with PC specimen with improved microstructure. Furthermore, GGBFS attracted a great interest as a new environment friendly engineering materials. Where, GGBFS reduce CO2 emission.
This thesis is intended to experimentally study the use of Ground Granulated Blast Furnace Slag Cement (SC), which is commercially available as CEM III/A cement with (36-65) percent of cement replacement and was compared with PC.
This study assesses the performance of slag cement mortars in terms of physiochemical and mechanical properties, durability against aggressive agents, and influence of elevated temperatures. In addition, microstructure perspectives investigated by SEM and XRD were evaluated. The study focused on using Semiadiabatic method for measuring the temperature rise due to heat of hydration during 72 hours after mixing.
Test results showed that the used slag cement had a high activity index and prolonged initial setting time. SC demonstrated positive synergistic effects on late compressive strength, enhanced durability against sulfates and acid attacks. Also, SC seemed to produce a more stable structure at elevated temperatures. Strength and durability improvement were correlated with an improved microstructure as indicated by Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) analyses. The improvement of the microstructure and pore structure was denoted by reducing the percentage of volume of capillary pores, and the initial absorption of water. On the other hand, SC demonstrated negative synergistic effects on early compressive strength. Finally, SC concrete sample has a low temperature rise due to heat of hydration by semi-adiabatic method.