Performance Evaluation of Styrene-Butadiene-Styrene-Modified Stone Mastic Asphalt with Basalt Fiber Using Different Compaction Methods.

Wensheng Wang,Haitao Wang,Guojin Tan,Peilei Zhou,Yongchun Cheng,Hanbing Liu

doi:10.3390/polym11061006

Abstract

Superpave gyratory compaction (SGC) and Marshall compaction methods are essentially designed according to volumetric properties. In spite of the similarity, the optimum asphalt contents (OAC) of the two methods are greatly affected by the laboratory compaction process, which would further influence their performance. This study aims to evaluate the performance of styrene-butadiene-styrene (SBS)-modified stone mastic asphalt (SMA) with basalt fiber by using SGC and Marshall compaction methods. Basalt fiber was proved to improve and strength the basic properties of SBS-asphalt according to test results of asphalt binder. The effects of SGC and Marshall compaction methods on OAC and volumetric properties, i.e., density, air voids (VA), voids in mineral aggregates (VMA), and voids filled with asphalt (VFA), were evaluated in detail. Finally, the pavement performance of asphalt mixture prepared by SGC and Marshall compaction methods were compared in order to analyze the high-temperature creep, low-temperature splitting, and moisture stability performance. Results showed that the OAC of SGC (~5.70%) was slightly lower than that of Marshall method (5.80%). Furthermore, the pavement performance of SGC specimens were improved to a certain extent compared with Marshall specimens, indicating that SGC has a better compaction effect and mechanical performance.

Highlights

By the end of 2018, the total mileage of highways in China has been 4.846 million kilometers, in which the mileage of expressway was 0.63 million kilometers
The results showed that the addition of basalt fiber into asphalt mixture can improve the pavement performance of asphalt mixtures well
The main objective of this study is to evaluate the performance of SBS-modified stone mastic asphalt (SMA) with basalt fiber by using Superpave gyratory and Marshall compaction methods

Summary

Introduction

By the end of 2018, the total mileage of highways in China has been 4.846 million kilometers, in which the mileage of expressway was 0.63 million kilometers. As a widely used road facility material all over the world, has been employed with a rapid growing trend for the vigorous developing highway infrastructure construction. SMA has been almost exclusively used for expressway as surface courses in China because of its superior pavement performance compared to conventional HMA [2,3]. SMA could provide better durability properties ( high rutting resistance) [4,5]. From the point of view of pavement performance, many researches on modifications to SMA have been developed in order to design durable pavement infrastructures in our daily lives

Objectives

Methods

Findings

Discussion

Conclusion