Improvement of Very-High Strength Heat-Resistant Concrete’s Brittleness Index Including Micro Polyether Ether Ketone Polymer under High Temperature. Curr. Probl. Res. [Internet]. 2026 May 22 [cited 2026 May 25];2(1):Pp. 54-73. Available from: https://journal.popularscientist.org/index.php/cpir/article/view/94