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原文传递 Case Study of High-Traffic In-Place Recycling on U.S. Highway 49: Multiyear Performance Assessment

题名：	Case Study of High-Traffic In-Place Recycling on U.S. Highway 49: Multiyear Performance Assessment
正文语种：	英文
作者：	Mississippi State Univ;Mississippi Dept, of Transportation
作者单位：	Ben C.Cox;Isaac L.Howard;Alex Middleton
关键词：	Cold in-place recycling; Full-depth reclamation; High-traffic; Multiple-component binder systems; Asphalt emulsion; Portland cement; Sustainability; Triple bottom line
摘要：	This paper documents the in-place recycling of a high-traffic project (12,000 vehicles per day) on U.S. highway 49 (US-49). Sections built included asphalt emulsion-stabilized cold in-place recycling (CIR), portland cement-stabilized CIR, cement-stabilized fulldepth reclamation (FDR), and traditional construction. This paper's objective is to present a case study of US-49 construction and performance through approximately 4.5 years of service. Performance was characterized by a distress survey, cored properties, and falling weight deflectometer testing. In particular, findings demonstrated performance and economic trade-offs between cement CIR and emulsion C1R, which could be directly applied to planning decisions. Emulsion CIR exhibited sufficient rutting capacity but reserve cracking capacity, at higher costs relative to cement CIR. Cement CIR, however, was more economical and exhibited excess rutting capacity but not excess cracking capacity. Because there is little need for reserve capacity of one distress when other distresses are past capacity, this paper proposes balanced binder blends (examples might include 2.5% emulsion with 2% cement, or 3% emulsion with 1.5% cement) for future consideration because they can provide sufficient capacity for multiple distresses while balancing economics.
出版年：	2016
期刊名称：	Journal of Transportation Engineering
卷：	Vol.142
期：	No.12
页码：	05016008