CREEP RECOVERY BEHAVIOUR OF BITUMINOUS BINDERS-RELEVANCE TO PERMANENT DEFORMATION OF ASPHALT PAVEMENTS

被引：0

作者：

Mturi, Georges A. J. ^{[1
]}

Nkgapele, Matsopole ^{[1
]}

O'Connell, Johan ^{[1
]}

机构：

[1] CSIR Built Environm, Transport Infrastruct Engn, ZA-0001 Pretoria, South Africa

来源：

ROAD AND RAIL INFRASTRUCTURE II | 2012年

关键词：

multiple stress creep and recovery; permanent deformation;

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The increase in traffic loads and loading time in road pavements worldwide has resulted in the widespread usage of polymer modified binders (PMBs) since they offer increased resistance to pavement distresses. The extensive use of inherently different modifiers has expanded the range of PMBs to select from when designing pavements in order to avoid pavement deformation. The new binder selection criterion using the Multiple Stress Creep and Recovery (MscR) protocol as per ASTM D74o5 is meant to differentiate the resistance to permanent deformation of different road binders. The MSCR test is essentially a repeated creep recovery test at a fixed loading/unloading interval. This paper aims to show how creep tests can differentiate the resistance to permanent deformation for different bituminous binders, whether modified or unmodified. The paper will also illustrate creep as a time-dependent deformation phenomenon that is specific to the rate and magnitude of traffic load.

引用

页码：335 / 341

页数：7

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