Characterization of two types of modified sulphur pellets for sulphur-extended asphalt mixtures

被引：1

作者：

Sakanov, Darkhan Kuandykovich ^{[1
]}

Aspanbetov, Daulet Abaikhanovich ^{[1
]}

Sakanov, Kuandyk Timirovich ^{[2
]}

Nurmetov, Serik ^{[1
]}

Borshchev, N. V. ^{[3
]}

Lou, Baowen ^{[4
]}

Barbieri, Diego Maria ^{[5
]}

机构：

[1] Kazakhstan Highway Res Inst, E Serikbaeva st 25, Astana, Kazakhstan

[2] Toraighyrov Univ, Dept Ind Civil & Transport Construct, Lomov st 64, Pavlodar, Kazakhstan

[3] Kazaq Bitum, Luhanskogo st 96, Alma Ata, Kazakhstan

[4] Norwegian Univ Sci & Technol, Dept Civil & Environm Engn, Hogskoleringen 7A, N-7491 Trondelag, Norway

[5] Oslo Metropolitan Univ, Dept Built Environm, Pilestredet 35, N-0166 Oslo, Norway

来源：

RESULTS IN ENGINEERING | 2024年 / 22卷

关键词：

Road pavement; Sulphur-extended asphalt mixture; Modified sulphur pellet; Rutting; Durability; MODIFIED BITUMEN; PERFORMANCE;

D O I：

10.1016/j.rineng.2024.102335

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The application of sulphur to partially replace traditional bituminous binder in asphalt mixture can offer attractive technical, economic and environmental advantages. Globally, Kazakhstan is the seventh largest producer of sulphur as this element is abundantly generated by many petroleum refining industries. This study concisely evaluates the performance of asphalt mixtures added with two types of modified sulphur pellets pivoting on laboratory and field investigations. Wheel track tests indicate a substantial reduction in rutting development for sulphur-extended asphalts (average final value approximate to 2 mm) compared to unmodified ones (average final value approximate to 7 mm). Further, uniaxial tension stress tests evaluating the durability at -20 degrees C, -30 degrees C, -40 degrees C document very similar results between modified and regular mixtures in terms of tensile strength and corresponding failure strain. Eventually, the construction of a pilot road surface stretch laid employing the sulphurbased pellets points at an approximate 5 % economic saving. Such promising experimental outcomes buttress the application suitability of sulphur-extended asphalt mixtures in Kazakhstan and encourage further thorough research in this direction.

引用

页数：5