Gamma Radiation as a Novel Technology for Development of New Generation Concrete

Waste Materials Cured and Modified by Irradiating and their Use in Concrete

“…3 The gammaradiation exposure can provoke either lateral chain fracture and produce radicals combining with each other in order to bond adjacent molecules (crosslinking) or can break the main chain (scission), reducing the mean molecular weight (degradation). 4 Whether both of these processes occur in similar proportions or whether one or the other dominates is dependent on the chemical composition of the polymer. The application of gamma radiation for recycling polymers has increased its acceptation as a current technology due to the ecologic and economical features and mainly to the capacity of ionizing radiation to alter and improve the structure and properties of practically any polymeric material.…”

Smart Protection of Polymer-Inhibitor Doped Systems

“…The effect of chemical treatment in a sodium hydroxide solution at 80 °C and gamma irradiation are clearly visible over the surface of nylon 6,6 pellets, rendering them active forming mesopores over the surface. [34][35][36] Adsorption of the passivation inhibitor onto the nylon 6,6 pellets active surface is obtained filling up the nylon pellets, in acetone with up to 8% (80 mg/ml) of ferric nitrate [Fe(NO 3 ) 3 ]. [34][35][36] Adsorption of the passivation inhibitor onto the nylon 6,6 pellets active surface is obtained filling up the nylon pellets, in acetone with up to 8% (80 mg/ml) of ferric nitrate [Fe(NO 3 ) 3 ].…”

Polypropylene Fibers as Reinforcements of Polyester-Based Composites

“…The release of residual styrene of the UP resins creates problems to the environment and is the source of odor in many applications. One alternative route of curing UP resins is by radiation processing [14,15]. Some differences are found when polyester resin with or without initiators is irradiated.…”