01660219

Component

Cold recycling is a cost effective and sustainable rehabilitation technique. Proper mixture design and optimization in terms of emulsion and cement contents can be helpful to ensure satisfactory performance. A balanced mixture design approach for cold recycling is proposed. The indirect tensile asphalt cracking test (IDEAL-CT) performed at 25ºC with 100 mm diameter gyratory mold compacted at 50 gyrations and 62 mm high cylindrical specimens and a loading rate of 50 mm/min was used to assess the cracking resistance of cold recycling. The resulting Cracking Test Index (CTI) could differentiate mixtures with varying emulsion and cement contents. Wheel tracking test performed at 60ºC on cold recycling slabs was used to evaluate the rutting resistance. The cracking and rutting tests can be highly valuable to select optimum emulsion and cement contents. Setting proper CTI and dynamic stability (DS) limits can aid in achieving an optimum design.

This paper was sponsored by TRB committee AFK50 Standing Committee on Structural Requirements of Asphalt Mixtures.

18-03404

English

20p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; Photos; References; Tables

Asphalt emulsions; Cement content; Cold in-place recycling; Mix design; Pavement cracking; Rehabilitation; Rutting

Emulsion content; Indirect tensile test

Highways; Maintenance and Preservation; Materials; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-03404

TRIS, TRB, ATRI

Jan 8 2018 10:50AM