THE ROLE OF DOLOMITE POWDER ON THE PROPERTIES OF SELF COMPACTING CONCRETE
Published In: 4TH INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL AND STRUCTURAL ENGINEERING
Author(s): AYUB ELAHI , M.A.BABRUS , S AHMAD
Abstract: The Dolomite Powder (DP), as a filler material has been used in the Self Compacting Concrete (SCC), which regulates the segregation of fresh concrete as well as rendering favorable impacts on the deformability of the SCC. The current study addresses the investigation of effects of locally available DP along with the proportions of locally available Fly Ash (FA), on the properties of SCC. The other aspect of this research work deals with the search of economical filler material to be used in concrete without compromising the strength of concrete and within the prescribed guidelines of European Federation of National Associations Representing producers and applicators of specialist building products for concrete (EFNARC).The specimens of concrete were cast using variousmix ratios of DP and FA. On the basis of the results obtained, it was indicated that with the use of DP along with the proportions of FA, the SCC fulfilled the criteria of EFNARC both in the fresh state and the hardened st
- Publication Date: 27-Sep-2015
- DOI: 10.15224/978-1-63248-070-5-66
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100% STATOR GROUND FAULT PROTECTION OF ALTERNATORS BY LOW FREQUENCY INJECTION AND USING REAL POWER SIGNAL
Published In: 4TH INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTING, ELECTRONICS AND ELECTRICAL TECHNOLOGY
Author(s): S M SALIM REZA
Abstract: n this paper, 100% stator ground fault protection by application of low frequency (20 Hz) injection for 6.6/132 KV alternators have been investigated. Here, different types of faults of alternators and possible protections by conventional means have been discussed. It is shown why conventional method by differential relay protection is not adequate. Modern approach of alternator fault protection is reviewed and effective methods of 100% stator ground fault protection of alternators have been applied. In this work, it is focused protection of alternators based on sub-harmonic injection method using low frequency band pass filter. The design of stator ground fault protection consists of 20 Hz signal generator, band pass filter, 20 Hz current relay and protection system model includes alternator, total capacitance to ground of stator winding, grounding transformer turns ratio, and neutral resistor. PSPICE simulation of the protection scheme is performed and analyzed.
- Publication Date: 27-Dec-2015
- DOI: 10.15224/978-1-63248-069-9-11
- Views: 0
- Downloads: 0