Open AccessImproved Mechanical Properties of Asphalt Mixture Using Vacuum Compaction Method
Author(s) -
Shibin Chen,
Xingtai Shi,
Yao Ya,
Yongchang Gao,
Su Pei
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/455/1/012092
Subject(s) - compaction , asphalt , materials science , composite material , void (composites) , aggregate (composite) , geotechnical engineering , geology
A novel vacuum compaction method, aiming to improve mechanical properties of asphalt pavement, was developed and compared to common compaction method. A compaction cylinder with a hole of adjusting air pressure was designed and fabricated and was utilized for finishing vacuum compaction and common compaction. Compared common compaction, at vacuum degree of-0.04 MPa air void of the sample after compaction decreases by 6.25% and at vacuum degree of-0.08 MPa it decreases by 10.9%, which indicated that vacuum compaction is more efficient than common compaction. Similarly, the changing of voids in mineral aggregate also exhibited the same trend, which indicated that vacuum degree at -0.08 MPa is the most efficient value. Through splitting test, splitting strength under vacuum compaction was higher than that under common compaction, by 10.2%. Furthermore, the ability of strain-stress increased by 11.55% by applying vacuum compaction. These results prove that the mechanical properties of asphalt pavement were optimized by the use of vacuum compaction instead of common compaction.