Quantitative evaluations on influences of aggregate surface texture on interfacial adhesion using 3D printing aggregate. (18th April 2022)

• Record Type: Journal Article
• Authors: Liu, Jianan; Wang, Zhenjun; Zhao, Xin; Yu, Cong; Zhou, Xiaowei
• Is Part Of: Construction & building materials. Volume 328(2022)
• Publication Date: 2022-04-18
• Subjects: Surface texture characteristics -- Adhesion property -- 3D printing aggregate (3DPA) -- Digital imaging -- Boiling test -- Asphalt pavement; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2022.127022
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: A regular icosahedron 3D printing aggregate (3DPA) was designed. 3DPA can quantitatively evaluate its adhesion to asphalt in the boiling test. The adhesion performance of 3DPA to asphalt is similar to that of basalt. The digital image of different aggregates is consistent with the boiling test. Abstract: In this work, icosahedral 3D printing aggregate (3DPA) was designed, prepared with three polyamide materials and compared with four natural aggregates for surface texture and difference in adhesion to asphalt. Firstly, the morphological and structural characteristics of 3DPAs were analyzed. Then, four kinds of natural aggregates were compared with 3DPAs for the boiling test to quantitatively evaluate the adhesion of 3DPAs and asphalt. Subsequently, the microscopic images of different aggregates were identified by digital image technology. Finally, the adhesion performance of different aggregates to asphalt was predicted by quantifying the number of edge points. The results show that the adhesion of 3DPAs to asphalt under boiling test is similar to basalt, better than diabase and granite, but worse than limestone. In particular, since 3DPAs are regular icosahedrons, the score can be quantified in the boiling test, which is significantly better than irregular natural aggregates. Digital image processing can accurately identify the microscopic morphology of aggregates and calculate their surface structural characteristics, and the results are basically consistent with the boiling test. 3DPA with regular shape is a method to avoid cutting natural aggregate and quantitatively evaluate asphalt adhesion properties accurately. The research results are helpful to promote the application of 3D printing technology in asphalt pavement.