Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : repeated load


The Influence of Recycled Crushing Strength of RC Beams under Repeated Loading

Mohammed A.E. Al Hamdani; Marawan M. Hamid; Nada M. Al Hussiny

Engineering and Technology Journal, 2019, Volume 37, Issue 1C, Pages 93-100
DOI: 10.30684/etj.37.1C.15

This paper describes a study of the effect of crashed (recycle) concrete on reinforced concrete beams. Three-dimensionally nonlinear finite elements analysis has been used conducted the numerical investigations of the general study of recycling-beam. ANSYS.11.0 computer-program using in this paper. Solid65 using as element of concrete, link8 for steel. The compression strength of the concrete mix decrease due to the strength of crashing concert. It’s weaker than gravel aggregate, that lower strength due to weak of old mortar cement around the aggregate and due to crashed process. The percentage of decrease of the compressive strength equal to (59.8) % and deflection of beam increase due to weak of concrete and the load of initial crack, it’s lower than traditional concrete contains natural aggregate.

Construction of Railway Track Using Asphalt – Ballast Layer

Kawther.Y.H.AL-Soudany

Engineering and Technology Journal, 2012, Volume 30, Issue 3, Pages 512-528

The work presented in this paper focuses on new trends in the construction of
rail track using asphalt ballast layer. Model tests were performed with ballast layer
150mm or 200mm. These thicknesses are the common range used in railway
construction. Overlaying a sandy layer 400mm in thickness. This condition
represents a case where rail networks pass through sandy zones.
Two series of model tests were performed; the first on untreated ballast and the
second where the ballast layer was incorporated with inter asphalt layers.
A model footing 200mm wide and 400mm long was placed on the surface of the
ballast layer and loaded monotonically or repeatedly up to failure. These
dimensions were selected representing the plain strain condition which exists in
real rail networks. The layers treated with asphalt demonstrated substantial
improvement in the load carrying capacity over the untreated layers.