الفهرس 
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Abstract
GRP is a composite material made of glass fibers dispersed in a
resin, usually polyester, which is widely used in several fields from
buildings to furniture to boats. Worldwide, there is a growing use
of GRP due to its lightness, high mechanical performance,
possibility of production in any shape and ease of installation and
good durability.
In this study, it adds different proportions of GRP is at 0.5, 1,
2.3, 4, 5, 6% of the cement weight of mortar which made by 1: 3 of
cement and sand with using the ratio by weight ,40 from the water
to cement weight. The mortar samples cured for 24 hours (from
mixing with the water time) when the relative humidity of 100%
then submerged under water for various times of a 3, 7, 28 and 90
Days conducted compressive strength measurements and total
porosity of the hardened pastes at different times of the cement
interaction, and so for the control mortar samples (without the
addition of GRP) and samples containing different ratios of residue
GRP The study concluded that the optimal ratio to add GRP to
cement mortar is 5% for the weight of the cement, and representing
the highest improvement in physical and mechanical properties of
hardened mortar slurries containing waste GRP.