The subgrade soil stiffness, which depends on the in-situ moisture content and index characteristics, is a key factor in pavement rutting. Due to variations compaction process used during construction seasonal changes, may deviate from desired condition. resilient modulus (MR), an important parameter of Mechanistic-Empirical (M-E) design process, specify stiffness. Repeated load triaxial tests,...

Resilient modulus is one of the important parameters used in analysis and modelling subgrade behaviour it directly related to safety, economic lifetime roads structures. The determination Modulus (MR) using repeated load triaxial (RLT) test expensive, cumbersome time consuming. Therefore, a new research approach has been adopted this study based on performing cyclic light weight deflectometer (...

Fatigue cracking is an essential problem of asphalt concrete that contributes to pavement damage. Although stone matrix asphalt (SMA) has significantly provided resistance to rutting failure, its resistance to fatigue failure is yet to be fully addressed. The aim of this study is to evaluate the effect of crumb rubber modifier (CRM) on stiffness and fatigue properties of SMA mixtures at optimum...

The feasibility of propagating road materials in the use of contracture wastes especially contented great amount waste bricks were researched in three aspects: Performance of recycled aggregate, mechanical properties of renewable road materials, compression splitting indexes. Conclusions are as following: recycled aggregates contenting great amount waste bricks in place of natural aggregates ar...

Abstract The type of subgrade a railroad foundation is vital to the overall performance track structure. With train speed and tonnage increase, as well environmental changes, evaluation influence are even more paramount in structure performance. A geomechanics classification for proposed coupling stiffness (resilient modulus) permanent deformation behaviour evaluated by means repeated triaxial ...