الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Sustainability is a clean healthy environment, a satisfactory level of economic well-being, and a forceful level of social fulfillment. These three supports of sustainability can be fulfilled with sustainable yield and sustainable waste disposal. Ceramic materials represent main percentage of construction and demolition waste, and originate not only from the building process, but also as rejected bricks, tiles and sanitary ware from industry. Employment of these wastes as supplementary cementitious materials as binders or cement substituted in building or paving is focused. This research aimed to investigate the properties and microstructure of alkali-activated cement pastes and mortars produced from fired ceramic waste materials. The primary reaction product was a sodium aluminosilicate gel, while different types of zeolites appeared as minority phases. The percentage and composition of these reaction products were found to depend on both the soluble silica content present in the activating solutions and curing time. In addition, the amount of gel was observed to have a decisive effect on the mechanical strength developing in the material. X-ray diffract grams of geopolymers indicated the existence of the major amorphous phases of ceramic waste, as well as the formation of a new amorphous phase in the geopolymeric matrices. Fourier-transform infrared (FTIR) spectroscopy analysis revealed essential ceramic waste phase transformations within geopolymers that affected their mechanical strength. The results of the current research indicate that a compressive strength is increased with the increase of alkali content, as well as with the increase of sodium silicate in the synthesis of geopolymers. These results demonstrate the possibility of using alkali-activated ceramic materials in building applications as eco-friendly cement in adhesion and building materials without more emission of CO2 as well as low cost energy consumption.
Key words: geopolymar, green cement, ceramic wastes, sodium silicate.