Investigate the influence of Aspect Ratio of Copper Fiber on the improvement of pure gypsum’s compressive strength

¹ Civil Engineering Department, Engineering College, Mustansiriyah University. Baghdad, Iraq.
² Enviromental Engineering Department, Engineering College, Mustansiriyah University, Baghdad, Iraq.

^* Corresponding author/ ahmedsahibdiab@yahoo.com dr.ahmed.al_ridha@uomustansiriyah.edu.iq.

Abstract

Current study describes copper fiber as a cut fiber with a length of 10 mm from construction waste, focusing on its potency in pure gypsum. The aspect ratio (L/D) for copper fiber mixtures is 12 and 20.8, with the first being for a diameter of 0.83 mm and 0.48 mm for the second diameter, with a volume ratio equal to 0.4%. Mixtures are organized into two groups, with the first group having a 0.6 water/gypsum ratio and the second group having a ratio of 0.5. Each of the ratios currently used includes three mixtures, the first of which is a reference mixture without copper fibers, and the second and third mixtures contain copper fibers of different diameters, both individually. The current study shows that the importance of compressive strength rises by reducing the W/G ratio for the three mixtures used and the importance of adding copper fibers to pure gypsum, which leads to an aspect ratio increases by reducing the copper fibers diameter which may directly effective to rise compressive strength for pure gypsum mixture containing copper fiber.