Besma M. Fahad - Department of materials engineering, University of Mustansiriya, Iraq.
Mustafa M. Hamza - Department of materials engineering, University of Mustansiriya, Iraq.

The effect of reinforcing the mortar with glass fibers in different alignment beside the addition of styrene butadiene rubber (SBR), were investigated in this work to show their influence on some physical properties. Differentseries were prepared, two of them were reinforced the mortar with glass fibers in two manner (random and layers). The others series were the same with the addition of SBR. These series were immersed in water withcontrolled conditions for 7 and 28 days. The glass fibers were added in different weight percentages (0, 54, 0.76, 1.1 and 1.42). The SBR was added at 7 % from water. Water absorption, ultrasound velocity and acousticimpedance were measured after preparing the specimens and com [paring them with controlled specimens. The results showed an improvement in mortar properties by reduction of water absorption, ultrasound velocity andacoustic impedance as well as producing lighter weight than conventional mortar. The best results were achieved by reinforcing with glass fibers layers in presence of Styrene Butadiene rubber after curing for 28 days

Random glass fibers, Glass fibers layers, SBR, Water absorption, Ultrasound velocity, Acoustic impedance