Research on the Performance and Modification Mechanism of Gutta-Percha-Modified Asphalt

Author:

Yan Simeng12ORCID,Cui Shichao1,Guo Naisheng1,Chu Zhaoyang1,Zhang Jun1,Yan Sitong2,Jin Xin3

Affiliation:

1. College of Transportation Engineering, Dalian Maritime University, Dalian 116026, China

2. College of Communication, Tonghua Normal University, Tonghua 134002, China

3. School of Transportation Engineering, Shenyang Jianzhu University, Shenyang 110168, China

Abstract

Presently, there is a significant focus on the investigation and advancement of polymer-modified asphalt that is both high-performing and environmentally sustainable. This study thoroughly examined the performance and modification mechanism of gutta-percha (GP) as a novel asphalt modifier. The investigation was conducted using a combination of macro- and microscopic testing, as well as molecular dynamics simulations. This work primarily examined the compatibility of GP with asphalt molecular modeling. This paper used molecular dynamics to identify the most suitable mixing temperature. Next, the gray correlation theory was used to discuss the most effective method for preparing gutta-percha-modified asphalt (GPMA). The macro-rheological tests and microscopic performance analysis provided a full understanding of the impact of GP on asphalt properties and the process of alteration. The findings indicate that eucommia ulmoides gum (EUG) exhibits good compatibility with asphalt, while sulfur-vulcanized eucommia ulmoides gum (SEUG) does not demonstrate compatibility with asphalt. Both EUG and SEUG enhance the thermal stability and resistance to deformation of asphalt at high temperatures, with SEUG having a particularly notable effect. However, both additives do not improve the resistance of asphalt to cracking at low temperatures. The manufacturing method for EUG-modified asphalt (EUGMA) involves physical mixing, whereas sulfur-vulcanized eucommia ulmoides gum-modified asphalt (SEUGMA) involves physical mixing together with certain chemical processes. This research establishes a theoretical foundation for the advancement of GP as a novel environmentally friendly and highly effective asphalt modification.

Funder

Natural Science Foundation of China

China Postdoctoral Science Foundation

Fundamental Research Funds for the Central Universities

“Double Tops” Construction Special Project of Dalian Maritime University

Science Foundation of Dalian, China

Foundation of Liaoning Educational Committee

Publisher

MDPI AG

Reference58 articles.

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