Investigation of performance and modification mechanism of ceramic-polishing-powder-modified asphalt mastic

Abstract

In this study, ceramic polishing powder (PP) as an industrial waste product, was treated by a silane coupling agent (KH550) and an NaOH solution, and then it was used to prepare the PP-modified asphalts. The performance of the modified asphalts and their modification mechanisms were examined. The results showed that the optimal preparation process was pre-shearing 15 min, and then shearing 60 min at 145°C, 4000 r/min after adding PP. KH550-PP-modified asphalt exhibited the best high- and low-temperature performances, thermal-oxidative aging resistances and anti-water damage performance and the lowest temperature sensitivity. PP was evenly dispersed in the original asphalt, which increased the bee structure and the surface roughness of the asphalt. The surface modifier changed the surface physical properties of the PP particles, which is helpful to achieve co-melting and blending with the original asphalt. However, an effect on the chemical structures of the composite-modified asphalts was not evident.

KEYWORDS:

• Ceramic polishing powder
• modified asphalt
• surface modifier
• modification mechanism

Acknowledgement

This work was supported by supported by State Scholarship Fund under Grant No. 201709480008, Hunan Province Education Scientific Project (No.19A164) and National Undergraduate Research and Creative Experiment Project (No. S202010534006). And we also thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by State Scholarship Fund: [Grant No. 201709480008]; the Key Scientific Research Project of Hunan Provincial Education Department: [Grant No.19A164]; National Undergraduate Research and Creative Experiment Project: [Grant No. S202010534006].