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Agricultural lignocellulosic fiber (wood flour)-waste was used to prepare composite materials through partial replacement of wood flour with low density polyethylene powder (LDPE) ranged from 10 to 20% by weight; these composites were made with and without electron beam irradiation (EB). The results obtained showed that, flexural strength, modulus of elasticity, modulus of rupture, and impact strength increase with increasing content of LDPE up to 20%. While, the percentages of thickness swelling and water absorption are decreased directly with increasing content of LDPE. Furthermore, the EB irradiation improves the physico-mechanical properties of composite materials from 10 to 50 kGy. The results obtained are also confirmed by scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). POLYM. COMPOS.,

The influence of methyl metharcylate and gamma exposure dose on the physico-chemical and mechanical properties of polymer-alite composite have been investigated. The hardened alite samples were impregnated with a methyl methacrylate monomer and then subjected to Y irradiation doses from 10-50 KGy. The effect of polymer loading (%), compressive strength, bulk density and the microstructure (scanning electron microscopy SEM), in addition IR spectra were studied. The results indicate that, polymer loading, compressive strength and bulk density increase with increasing absorbed dose. This is attributed to the deposition of the polymer in the pores of the samples. SEM showed the voids between the particles in the samples before the impregnation, whereas, the formation of new products in the pores appeared after impregnation.

This study focuses on the partial substitution effect of ordinary Portland cement (OPC) by different ratios of waste glass powder (5%, 10%, and 20% by weight of cement) on the performance of blended cement mortars. The hardened blended cement mortars were first cured under tap water for different time intervals 3, 7, 28, and 90 days. However, the effect of addition of 10% styrene‐acrylic ester as well as the influence of different doses of gamma rays on the physico‐chemical and mechanical properties of polymer modified blended cement mortar specimens were discussed. Compressive strength, total porosity, and water absorption percentages were measured. The experimental results showed that the physico‐chemical and mechanical properties of blended cement mortars specimens improved as the waste glass content increases up to 20%. In addition, irradiated SAE blended cement mortar composites containing 20% waste glass showed an enhancement in its properties as compared to neat cement (0%WG content) composites. The results were confirmed by X‐ray diffraction, thermogravimetric analysis, and scanning electron microscopy. POLYM. COMPOS., 39:985–996, 2018. © 2016 Society of Plastics Engineers