Compaction characteristic and operability factor of warm bituminous mixture

YAN Xi-li; CHEN Si-lai; AN Shu-wen; LI Ang; ZHANG Qing

Volume 17 Issue 1

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YAN Xi-li, CHEN Si-lai, AN Shu-wen, LI Ang, ZHANG Qing. Compaction characteristic and operability factor of warm bituminous mixture[J]. Journal of Traffic and Transportation Engineering, 2017, 17(1): 11-19.

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YAN Xi-li, CHEN Si-lai, AN Shu-wen, LI Ang, ZHANG Qing. Compaction characteristic and operability factor of warm bituminous mixture[J]. Journal of Traffic and Transportation Engineering, 2017, 17(1): 11-19.

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Compaction characteristic and operability factor of warm bituminous mixture

1.
School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
2.
Laboratoire des Géomatériaux, Ecole Nationale des Travaux Publics de l'Etat, Lyon 69120, Rhône, France
3.
Sichuan E-gang RoadEngineering Construction Co., Ltd., Chengdu 610041, Sichuan, China

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Author Bio:
YANXi-li(1963-), male, professor, PhD, +86-29-82334434, xili.yan@chd.edu.cn
Received Date: 2016-11-15
Publish Date: 2017-02-25

Abstract

Abstract

To study the compaction characteristics and compaction operability of warm bituminous mixture, AC-13 C mixtures were made based on 3types of warm mix bitumens with the same brand (ACMP1, ACMP2 and ACMP3) and 2kinds of hot mix bitumens (70 ^# base bitumen and SBS modified bitumen).The compactness and stability of each Marshall specimen were measured by Marshall compaction test, their change rules were analyzed in different initial compaction temperatures and times, and the exponential regression relationship between compactness and compaction times was proposed.The curvature factor on compaction growing was applied and the operability factor was defined to evaluate the compaction workability.Test result shows that the compactness of bituminous mixture increases exponentially with the increase of compaction times, increases faster in the early stage, slows in the late stage, and stabilizes finally.The compactness increases linearly with the increase of initial compaction temperature within 90 ℃-150 ℃.Marshall stability increases linearly with the increase of compactness in accordance with traditional research results.The operability factor of warm bituminous mixture decreases by13.5%-18.5% compared with hot bituminous mixture, so it is easier to be compacted.
- pavement material,
- bituminous mixture,
- compactness,
- compaction temperature,
- compaction times,
- operability factor

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