01373751

Component

Highway applications are perceived by the public as useful means of disposal for a wide range of waste streams because of the large volume of materials used for highway projects. However, agencies need to consider any addition to a highway application as a construction material which should enhance the performance and/or lower cost of the final application. A total of 93 telephone interviews were conducted to document agency experiences with using byproducts in highway applications. Combinations of highway applications and byproducts represented with the interviews covered Portland cement concrete (PCC) applications using coal combustion, and iron, steel, and non-ferrous slags. Hot mix asphalt applications used mineral and quarry, scrap tire, and roofing shingles byproducts. Unbound applications (aggregates, embankments, fills) used coal combustion, scrap tire, cement kiln dust, recycled concrete aggregates, and iron, steel, and non-ferrous slag byproducts. An on-line survey of state materials engineers (46 agencies) was conducted for NCHRP 40-01 Use of Byproducts in Highway Applications. Along with the surveys, respondents were requested to provide contact information for staff with experience using byproducts in highway applications. This requested 85 contacts with experience with 92 combinations of byproducts and applications. This contact was used to conduct telephone interviews which showed that while there were a number of barriers that needed to be overcome by agencies, the benefits eventually overcame the barriers. The most common reasons for using byproducts in highway applications are the application are a good use of the byproduct, and it improves properties, improves performance, extends the life of the treatment, and is cost effective.

This paper was sponsored by TRB committee ADC60 Waste Management and Resource Efficiency in Transportation

01362476

12-0649

English

18p

2012

Transportation Research Board 91st Annual Meeting

Digital/other

Maps; References; Tables

Benefits; Interviewing; Pavement performance; Portland cement concrete; Service life; Transportation departments; Waste products (Materials)

Highways; Maintenance and Preservation; Materials; Pavements; I30: Materials; I52: Construction of Pavements and Surfacings; I60: Maintenance

Transportation Research Board Annual Meeting 2012 Paper #12-0649

TRIS, TRB

Feb 8 2012 4:56PM