Combined Effect of Polypropylene Fiber and Nano Calcium Carbonate to Improve Compressed Earth Blocks Produced from Clayey Soil, Kirkuk City, Iraq. INJES [Internet]. 2025 Jul. 1 [cited 2026 Jun. 23];25(3):29-4. Available from: https://earth.uomosul.edu.iq/index.php/earth/article/view/40990