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CHARCTERISTICS OF SULPHATE RESISTING CEMENT PASTES CONTAINING DIFFERENT RATIOS OF BELITE PHASE Scientia Research LibraryJournal of Engineering and Technology Research2348 - 04242025132 H. El-Didamony[1a], A. Radwan[1b], I. Khattab[2], E.A. El-Alfi[3] , Mona S. Mohammed[4] page no:15-25 1 The influence of tricalcium silicate (alite) content on the properties of the sulphate resisting cement (SRC) was studied. Three types of SRC with various ratios of alite/belite were prepared. The water of consistency, initial, and final setting time of these cements as well as the kinetics of hydration and physico-mechanical properties of the cement pastes were determined. Some of the hydrated cement pastes were investigated using DTA, TGA, XRD and IR techniques. The results show that the increase of alite content enhance the rate of hydration, and hence the early strength development, at the expense of the ultimate strength. One reason for this is that the microstructure formed during the accelerated hydration is usually coarser and less favorable for strength development. Contrary to this, slow hydration with increasing belite content cement paste allows the formation of a microcrystalline or gel-like structure of large surface area, which results in an ultimate good strength. Keywords: Sulphate resistance cement, Belite phases, Hydration properties http://www.scientiaresearchlibrary.com/archive-abs.php?arc=905http://www.scientiaresearchlibrary.com/archive/CHARCTERISTICS OF SULPHATE RESISTING CEMENT PASTES CONTAINING DIFFERENT RATIOS OF BELITE PHASE.pdf

Transient stability of 11-bus system using SVC and improvement of voltage profile in transmission line using series compensator Scientia Research LibraryJournal of Engineering and Technology Research2348 - 04242025132 Ramlal Das [1], Dr D.K. Tanti [2] page no:1-14 1 Power system stability is defined as the ability of power system to preserve its steady stability or recover the initial steady state after any deviation of the systems operation. Present time power systems are being operated nearer to their stability limits due to economic and environmental reasons. Maintaining a stable and secure operation of a power system is therefore a very important and challenging issue. Transient stability has been given much attention by power system researchers and planners in recent years, and is being regarded as one of the major sources of power system insecurity. Shunt FACTS devices play an important role in improving the transient stability, increasing transmission capacity and damping low frequency oscillations. In this work 11- bus power system network has been modeled using MATLAB SIMULINK software. The power system network under study consist of three units of power plant each producing 20 KV and step up by two winding transformer to 230 KV. For parallel operation of two different power plants, the frequency and the terminal voltage has been kept constant to avoid circulating current in the existing network. A Static VAR Compensator and a series compensator have been used in the considered network for improving the transient stability and to increase the transmission capacity of the system. Keywords: Power System Stability, Transient Stability, SVC, Series Compensator http://www.scientiaresearchlibrary.com/archive-abs.php?arc=908http://www.scientiaresearchlibrary.com/archive/Transient stability of 11-bus system using SVC and improvement of voltage profile in transmission line using series compensator.pdf