الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Large quantities of CKD are produced during the manufacture of cement clinker by the dry process. The technico–economical problems that arise in the transportation of dust from the plant to outside as well as the severe pollution to the surrounding atmosphere show the utmost necessity of utilizing CKD as one of the main objectives during the last decade.
Granulated blast- furnace slag (GBFS) is a by product of iron manufacture and results from the reaction of CaO with coke and the siliceous as well as aluminous residue remaining after the reduction and separation of iron . The slag, which has a chemical role in removing impurities from molten iron, rises to the surface and trapped off from the blast furnace.
This work aims to study the hydration as well as durability and firing effect of slag rich cement with substitution of different contents of slag cement by , CKD and NS. The water of consistency, initial and final setting times were determined for each cement paste. The hydration characteristics such as combined water, free lime contents and bulk density as well as compressive strength of the cement pastes cured up to 90 days were studied. The hydration products were identified by using TG, DTA and XRD techniques. The durability of cement pastes in comparison with OPC and other pastes containing CKD and NS also studied after immersing the cement pastes in seawater up to one year. The extent of durability was investigated by the determination of combined water, free lime, total chloride, bulk density, compressive strength of cement pastes after 1,3,6,9 and 12 months of immersion in seawater. Also, the effect of this aggressive water was determined by DTA, TG and XRD techniques. The fire resistance of cement pastes prepared from OPC, GBFS, CKD and NS were evaluated after firing at 250, 450, 600, 800 oC for 2 hrs. The physico-mechanical properties such as bulk density, total porosity, weight loss, and compressive strength were determined at each firing temperature.