Study on Properties of Bone Glue/Polyurethane Composite Modified Asphalt and Its Mixture

Abstract

Composite modification technology is widely used in the materials field. To enhance the property of polyurethane modified asphalt and realize its application in road engineering, the bone glue/polyurethane composite modified asphalt (CMA) was prepared using bone glue, polyurethane, and neat asphalt in this research. The bone glue content ranges 5–10%, that of the polyurethane is 1–5%. The relationship between the modifier’s content and the conventional properties and rheological properties of CMA was revealed by response surface methodology (RSM). The CMA performance was further verified under the optimal content of the bone glue and polyurethane. The differences of properties of styrene–butadienestyrene (SBS) modified asphalt mixture, neat asphalt mixture, and bone glue/polyurethane CMA mixture were compared and analyzed by using the pavement performance test. The results showed that the CMA’s conventional properties and rheological properties are improved. The optimal bone glue content and polyurethane content determined by RSM are 6.848% and 2.759%, respectively. The low-temperature crack resistance and water stability of the CMA mixture are enhanced, better than neat asphalt mixture and SBS modified asphalt mixture. The CMA mixture’s dynamic stability is 85% of SBS modified asphalt mixture, but it is 2.4 times of neat asphalt mixture. The result indicated that the bone glue/polyurethane CMA mixture still has certain advantages of high-temperature stability. In this research, the composite modification of bone glue and polyurethane can significantly enhance the characteristic of asphalt and asphalt mixture and provide a new method for applying and promoting polyurethane modified asphalt in road engineering.

Research on high and low temperature rheological properties of TPU/SBR composite modified asphalt

“…In order to investigate the changes in the rheological properties of asphalt under actual ambient temperature conditions, this study examined the changes in the rheological properties of asphalt materials using DSR according to the ASTM D7175 (AASHTO T31509) specification [25][26][27]. The oscillatory stress applied by this method better corresponds to the load conditions that asphalt experiences during actual service, thus providing a more accurate characterization of the asphalt's real-world performance.…”

“…A special network structure, more stable than those formed by other modifiers and asphalt, is formed by the chemical reaction between polyurethane and asphalt. This enhanced stability effectively improves the storage stability of asphalt and ensures that the performance of modified asphalt remains favorable over the long term [15]. Furthermore, studies conducted by respected scholars have demonstrated that incorporating polyurethane into asphalt leads to significant improvements in resistance against high-temperature rutting, aging, and water damage, as well as various other benefits.…”

“…For this reason, the search for an alternative modifier with abundant sources and low costs to enhance the low-temperature crack resistance of polyurethane-modified asphalt becomes imperative. Butadiene rubber, a high-quality synthetic rubber, is characterized by its wide availability and affordable price [15,17]. Research has shown that the addition of a small amount of butadiene rubber can significantly enhance the low-temperature performance of asphalt and improve the low-temperature crack resistance of asphalt mixtures [17][18][19].…”

Property of Modified Bovine Bone Glue as an Environmental Additive in Water-Based Drilling Fluids

“…At present, animal bone glue is widely used in the industry, medical treatment, and other fields, and the application has been effective. , For example, Yan et al studied the bone glue/polyurethane composite modified asphalt (CMA) prepared using bone glue, polyurethane, and neat asphalt, and realized its application in road engineering . Norton et al studied the properties of bone adhesive and found that the chemical composition of bone adhesive can react in humid environments, forming a strong and durable bond with live bone and metal implants.…”

Study on Storage Stability of Activated Reclaimed Rubber Powder Modified Asphalt

“…However, it has exposed some defects such as easily cracking at low temperature and easily softening and flow at high temperature, which greatly limit the scope of its application [ 3 , 4 ]. In order to further promote the serviceability performance of asphalt, researchers have put forward a variety of improvement measures through unremitting efforts [ 5 , 6 , 7 , 8 , 9 ]. Among the many measures, the modification of asphalt using waste rubber powder was the most promising.…”