1、Effect of urea
Based on the polymer self-healing theory, a prediction model of the self-healing efficiency of UF microcapsule/SBS modified asphalt is established with healing temperature, healing time, and...
2、Rheological and self
Urea formaldehyde resin (UF) self-healing microcapsule was prepared by in-situ polymerization method and the monomer properties of microcapsule were characterized.
3、Study on the Self
The urea–formaldehyde (UF) resin microcapsules prepared by Zhang et al. [20] successfully achieved the self-healing effect of filling cracks in asphalt pavements and confirmed that they do not affect the mechanical or road performance of asphalt pavements.
4、Design, preparation and properties of microcapsules containing
In order to repair the cracks that were caused by the vehicle load and natural environment in the asphalt pavement, a microcapsule containing urea-formaldehyde resin as a core material...
Fabrication of urea formaldehyde–epoxy resin microcapsules
In this study, urea formaldehyde–epoxy resin (UFE) microcapsules were prepared using polyurea formaldehyde as the wall and epoxy resin as the core material, which were in turn applied to...
Preparation, characterization and repeated repair ability evaluation of
Abstract In order to improve the repeated repair ability of asphalt-based crack sealants, two types of microcapsules were prepared and added into asphalt-based crack sealant.
Fabrication and application of polyurea formaldehyde
In this study, microcapsules were prepared from polyurea formaldehyde (as microcapsules wall) and bio-asphalt (as microcapsules core) and were in turn applied to prepare microcapsule-styrene-butadiene styrene (microcapsule/SBS) modified asphalt.
Road Performance and Self
Urea–formaldehyde (UF) is a common shell material for self-healing microcapsules; however, the influence of urea–formaldehyde microcapsules (UFMs) on the road performance of bituminous mixtures and the sensitivity of their healing abilities remains unclear.
Fabrication of urea formaldehyde–epoxy resin microcapsules
In this study, urea formaldehyde-epoxy resin (UFE) microcapsules were prepared using polyurea formaldehyde as the wall and epoxy resin as the core material, which were in turn applied to fabricate UFE-styrene butadiene styrene modified asphalt (abbreviated as UBS asphalt).
Design of melamine
Three microencapsulated phase change materials (MPCMs) were prepared using paraffin wax (PW), stearic acid (SA), and palmitic acid (PA) as core materials, and melamine-urea–formaldehyde (MUF) resin as the wall material.
In modern transportation infrastructure construction, the maintenance and repair of asphalt pavements are critical to ensuring the long-term stability and functionality of roads. Among various repair techniques, crack filling technology has been widely applied in the upkeep of highways, bridges, and other infrastructure due to its effectiveness in addressing pavement cracks. traditional asphalt-based crack fillers often suffer from poor weather resistance, susceptibility to aging, and weak adhesive properties, which significantly limit their performance under harsh environmental conditions.
Urea-Formaldehyde Resin Modified Asphalt Crack Filler
Against this backdrop, urea-formaldehyde resin (UF) modified asphalt crack filler has emerged as a superior solution, leveraging its unique performance advantages. This innovative material combines the benefits of conventional asphalt with chemical modifiers, enhancing durability, adhesive strength, and adaptability to environmental changes.
Composition and Mechanism The UF-modified asphalt crack filler primarily consists of asphalt, modifiers, curing agents, and fillers. The modifier plays a pivotal role by chemically reacting with asphalt to improve its structural integrity, making it more robust and durable. Meanwhile, the curing agent facilitates cross-linking reactions between the modifier and asphalt, forming a stable network structure that reinforces mechanical properties.
Performance Advantages In practical applications, UF-modified asphalt crack filler demonstrates exceptional performance. It remains stable under extreme temperature fluctuations and harsh weather conditions. Its excellent water resistance and oil resistance make it particularly suitable for environments with frequent exposure to moisture and debris, such as highways and urban roads, effectively shielding pavements from water and contaminant penetration.
Beyond its physical properties, the material exhibits outstanding chemical stability. It resists corrosion from chemicals like acid rain and salt spray, thereby extending pavement lifespan. Additionally, its superior anti-aging capabilities allow it to maintain functionality even after prolonged exposure to ultraviolet radiation and temperature variations.
Limitations and Future Prospects Despite its advantages, UF-modified asphalt crack filler has certain drawbacks. Its relatively high cost may increase maintenance expenses. Furthermore, its performance could be compromised in extreme temperatures (e.g., very high or low environments), necessitating further technical optimization.
Looking ahead, advancements in technology and material science will likely drive broader applications and improvements for UF-modified asphalt crack filler. Continued innovation could enhance its eco-friendliness, efficiency, and cost-effectiveness, revolutionizing road maintenance practices and contributing to global infrastructure development.
As a next-generation pavement repair material, UF-modified asphalt crack filler has become indispensable for modern road maintenance due to its superior performance and versatility. With ongoing technological progress, future road maintenance is poised to become smarter, more efficient, and environmentally sustainable.
