Preparation of capsules containing rejuvenators for their use in asphalt concrete

Fabrication and characterization of self-healing microcapsules containing bituminous rejuvenator by a nano-inorganic/organic hybrid method

“…García et al [10,11] found a method to prepare rejuvenator capsules by using an epoxy resin as a coating and porous sand as a skeleton. Pei et al [12] fabricated microcapsules containing rejuvenator using urea-formaldehyde resin as a shell material based on an in-situ polymerization.…”

Investigation the possibility of a new approach of using microcapsules containing waste cooking oil: In situ rejuvenation for aged bitumen

“…Numerous methods have being employed with regard to preserving asphalt pavement, including rejuvenator emulsions, fog seals and several different thin overlay technologies [5]. Of these methods only the first, the application of rejuvenators, can restore the original properties of the pavement, primarily by restoring the original asphaltene/maltene ratio [6,7]. In general, aromatic rejuvenating agents work best since they tend to improve both the hardening and temperature susceptibility of the pavement.…”

“…Microencapsulation represents a potential means of overcoming these problems and thus encapsulating rejuvenators inside the bitumen may be an alternative approach worthy of consideration. García et al [18] reported a method of preparing rejuvenator capsules by using an epoxy resin as the coating and porous sand as the base or skeleton. The advantages of these capsules include sufficient strength to resist the mixing process as well as resistance to high temperatures and the ability to undergo prolonged storage in the road material until required.…”

Investigation of the possibility of using waste cooking oil as a rejuvenating agent for aged bitumen

“…Despite the limited resources, it has been applied in abundance (110 million tonnes annually in the world) in the highway industry [1]. The ageing of the bitumen during storage, mixing, transport and laying on the road, as well as in service life [2], are the most important problems presented by the use of bitumen in pavements.…”