The results of the study of the process of obtaining a bitumen composition for cold-applied roofing materials are described. For this purpose, the modification of construction bitumen BNB 70/30 with rapeseed oil (RO) and rubber crumb (GK) from recycled tires was used. The effect of the concentration of RO and GK on the softening temperature, penetration, ductility, elasticity, flexibility at -25°C, and adhesion was studied.
The process of modifying road bitumen obtained from the residues of Ukrainian oils processing with rubber crumb has been studied. The dependence of the softening temperature, ductility, penetration, and elasticity of the three-component bituminous composition “bitumen : linseed oil : rubber crumb” on its formulation has been examined. Based on the mentioned composition a new type of cold-applied bitumen roofing has been developed. A process flow diagram for the production of modified bitumen and special-purpose bituminous composition has been developed.
The main regularities of the modification with a rubber crumb for bitumen produced from the residuals of crude oils of Ukrainian deposits have been studied. The thermal stability of the rubber crumb has been examined using the derivatograpgy. The mechanism of bitumen modification with the rubber crumb at low and high temperatures has been established. The influence of technological factors on the main quality indices of modified bitumen has been studied. The changes in the group composition of the original and modified bitumen were found.