Soil quality improvement has long drawn the attention of civil engineers. Loose sandy soils are considered as a group of low quality soils because of their low bearing capacity, high compressibility as well as problems of excavation within these soils for constructional operations. In this experimental study, strength improvement of a silty sand has been investigated using Polyvinyl-Acrylic (Vinyl acetate-acrylic copolymer) and Styrene-Acrylic Copolymer resins as well as acrylate waste fibers. Adopting an environmental approach, the carpet factories wastes (Acrylic fibers) have been used to stabilize the sandy soil regarding the degree of strength improvement. Various amounts of the additive materials including Polyvinyl-Acetate Resin, ranged from 0.25 to 1.5%, Sodium Hypochlorite as a setting accelerator, 10% by weight of the base Resin (Polyvinyl Acrylic), Styrene-acrylic Copolymer 0.25% to 3%, and acrylic waste fibers of .025, .05 and 0.1 percent by weight of dry soil were used to stabilize the soil samples. Uniaxial compression tests were used to evaluate the effects of the Resins and fibers on the soil strength both individually and in combination. All of the experiments were carried out under real-time conditions of 24 hours, except for the addition of Sodium Hypochlorite to Polyvinyl-Acrylic, as well as the study of curing time effects on the degree of strength improvement. The tests results indicate that unconfined compression strength (UCS) of the stabilized samples continuously increased by adding Polyvinyl-cellulose Resin up to 0.5% while at greater amounts of the additive resin, the strength tended to decrease. The maximum UCS was achieved at 0.5% Resin which was about 5.5 times that of the untreated soil. Among the various combinations of Polyvinyl-Acrylic Resin and fibers, the maximum UCS of 846.1kPa was obtained at combined additives of 0.5% of resin and .025% fibers which was about 8.8 times of the untreated soil strength. The unconfined compression strength (UCS) of the stabilized samples with combined additive of 0.5% base resin, .025% fiber, along with modifier resin of Styrene-Acrylic Copolymer (SAC) continuously increased with increasing the SAC to 2.25% and then decreased at higher percentages of the SAC. At the 2.25% additive of modifier resin of ASC, the UCS of the stabilized samples reached to 20.8 times of the untreated soil strength. Considering the curing time, the maximum compressive strength of 28 days treated samples with 0.5% base Resin and .025% fiber increased to 10.3 times that of 3-days samples. In the next step, the strength of stabilized samples with 0.5% Polyvinyl-cellulose Resin and 2.25% the Styrene-acrylic Copolymer plus .025% fiber were determined by direct shear tests, The additives increased the internal friction angle from 31.1 to 47.4 degrees and the soil cohesion from 6 to 351.8kPa indicating the enhancement of the modified soil performance in terms of strength parameters. CBR tests in dry state were also carried on the untreated sand as well as soil samples stabilized with 0.5% Polyvinyl-Acetate Resin and 2.25% of Styrene-Acrylic Copolymer with 0.25% fiber under 24hours of curing time. It was found that the CBR value of the treated sample was 55.8% greater than of the untreated soil sample. Keywords: correct inferior quality of sand, Polyvinyl-cellulose Resin (Polyvinyl acetate-acrylic copolymer), Copolymer Resin Acrylic styrene, Acrylic waste fibers, UCS.