http://dspace.epoka.edu.al/handle/1/1921 4rth International Balkans Conference on Challenges of Civil Engineering Wed, 15 Apr 2026 19:32:49 GMT 2026-04-15T19:32:49Z http://dspace.epoka.edu.al/handle/1/1947 Study of Microstructure of Waste Tyre Ash (WTA) Concrete Using the Scanning Electron Microscopy (SEM) and X – ray Diffraction (XRD) Techniques Magana Aliyu, Muhammad; Adamu, Musa This paper reports the findings of an investigation into the microstructure of WTA – Concrete. The WTA was obtained by open burning of waste tyre slices to a temperature of about 5000C for about five (5) hours at the local open burning sites in Kano. And after allowing to cool, it was sieved through 75 µm BS Sieve and characterized. The ash was subjected to chemical composition analysis using the X-Ray fluorescence (XRF) analytical method using the X –Ray spectrometer machine. The investigation was carried out on a concrete of 29 N/mm2 compressive strength, Water – cement ratio (w/c) of 0.65 and slump range of 10 – 50mm. The microstructure assessment was conducted on the concrete at WTA replacement levels of 0, 5, 10, 15, 20, 25, and 30% of cement weight, respectively to determine the influence of WTA on the microstructure of WTA – Concrete using SEM and XRD techniques. Both SEM analysis and XRD results of WTA – concrete indicated the occurrence of pozzolanic reaction between WTA and cement and that the WTA has more porous micro-structure than OPC concrete especially at hig Fri, 18 Dec 2020 00:00:00 GMT http://dspace.epoka.edu.al/handle/1/1947 2020-12-18T00:00:00Z http://dspace.epoka.edu.al/handle/1/1946 Behavior of RC frames under quasi-static diagonal loads Luga, Erion; Mustafaraj, Enea; Lika, Ervis The aim of this investigation is to analyze the mechanical behavior of reinforced concrete frames under diagonal loads. The study provides a combination of analytical and experimental work related to the quasi-static diagonal loading of the reinforced concrete frames. The analytical modeling of the RC frames was performed in ETABS software on a real scale frame, whereas the experimental test was performed on a RC frame of a scale 1/3 of the analytical model. The load displacement curves were built from both the investigation methods and the maximum strength, yielding point, maximum displacement parallel and perpendicular to the loads, Modulus of Elasticity, and ductility factor (Rµ) of the RC frames were obtained and analyzed. Fri, 18 Dec 2020 00:00:00 GMT http://dspace.epoka.edu.al/handle/1/1946 2020-12-18T00:00:00Z http://dspace.epoka.edu.al/handle/1/1945 Public-Private Partnerships in Albania: From the Legislative Provisions to Risk Management Keçi, Julinda Fri, 18 Dec 2020 00:00:00 GMT http://dspace.epoka.edu.al/handle/1/1945 2020-12-18T00:00:00Z http://dspace.epoka.edu.al/handle/1/1944 Polypropylene reinforced mortar coating for improvement of unreinforced masonry (URM) shear resistance Mustafaraj, Enea; Yardim, Yavuz; Corradi, Marco Fri, 18 Dec 2020 00:00:00 GMT http://dspace.epoka.edu.al/handle/1/1944 2020-12-18T00:00:00Z