G. Abtan Y, T. Jaber H. BEHAVIOR OF HYBRID REINFORCED CONCRETE BEAMS COMBINING REACTIVE POWDER CONCRETE AND VARYING YTPES OF LIGHTWEIGHT CONCRETE. J. eng. sustain. dev. 2016;20(2):204-223. Accessed June 4, 2026. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/677