Z. . A. Mohammed, L. . A. Al-Jaberi, and A. . N. Shubber, “EFFECT OF POLYPROPYLENE FIBER ON PROPERTIES OF GEOPOLYMER CONCRETE BASED METAKOLIN”, J. eng. sustain. dev., vol. 25, no. 2, pp. 58–67, Mar. 2021, doi: 10.31272/jeasd.25.2.7.