In a single agency is SRT Thai domestic rail structure, the rock strewn path to service domestic Rails transport Thai. It is operating in a wide range of materials for applications based on the suitability of the material source in the region. For the selected material is used as a rock strewn path configured to use stones as well as akni. Which to choose the material that is presented as a rock strewn path, it must be as Granular materials type materials, angles. Pellet size, solid information, regular fragmentation And don't do the reaction of cement (Selig and Waters, 1994)
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