NDLI: Laboratory and field evaluation of recycled unbound layers with cement for use in asphalt pavement rehabilitation

Content Provider	Springer Nature Link
Author	Bessa, Iuri S. Aranha, Ana L. Vasconcelos, Kamilla L. Silva, Amanda H. M. Bernucci, Liedi L. B.
Copyright Year	2015
Abstract	The use of recycling techniques in the rehabilitation of old pavements has become an important tool for pavement engineering practices. The reduced costs and the scarce natural resources are the main reason for which the development and improvement of recycling processes have been studied by many researchers around the world. The main objective of this paper is to investigate the structural responses of an asphalt pavement after using deep recycling techniques of granular layers with an addition of cement for the rehabilitation of asphalt pavements. Laboratory analysis using resilient modulus, indirect tensile strength (ITS), and unconfined compressive strength (UCS) tests were performed for mixes with 5 and 6 % of cement content, two compaction energies and three curing periods. In the field, two sections using 250 and 300 mm thicknesses of a recycled base layer were constructed with 5.0 % of cement addition. An evaluation of these experimental test tracks was conducted by performing deflections and by mechanical characterization of samples extracted from the test site at different ages. The results indicated differences in UCS and ITS values for the laboratory mixes. Field specimens from the 300 mm-section presented higher stiffness than the 250 mm. Studies have shown that the resilient moduli determined from nondestructive test based on backcalculation procedures are similar from those determined in the laboratory through modulus of elasticity tests.
Starting Page	2669
Ending Page	2680
Page Count	12
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	49
Issue Number	7
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-07-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Design of recycled granular base layer Portland cement Mechanical behavior Field evaluation Deflection measurements Structural Mechanics Materials Science Theoretical and Applied Mechanics Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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