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Development and Validation of a Balanced Mix Design Approach for CIR Mixtures Using Full-Scale Testing.
| 题名： | Development and Validation of a Balanced Mix Design Approach for CIR Mixtures Using Full-Scale Testing. |
| 作者： | Ali, A; Saidi, A; Mehta, Y; DeCarlo, C. J; Elshaer, M. H; Cox, B. C; Lein, W. A. |
| 摘要： | The main goal of this study was to improve the performance of cold in-place recycling (CIR) mixtures by using a balanced mix design (BMD) ap-proach. This study involved preparing and testing CIR mixtures in the labat varying contents of bituminous additives and constant content of 1% ce-ment and 3% water. Eight combinations of CIR mixtures were producedfor this study using two binders (emulsion and foamed asphalt), compac-tion efforts (30 and 70 gyrations), and curing processes (72 hours at 140°Fand 50°F). Results showed that asphalt pavement analyzer, semicircularbend, and indirect tensile strength tests presented the highest correlationwith the change of binder contents. The study successfully used the devel-oped BMD for designing CIR mixtures and selecting their optimum bindercontents. It then used three balanced CIR mixtures to construct full-scalepavement sections to validate the BMD approach in the field. A heavy ve-hicle simulator was used to apply different accelerated loadings on eachsection. Results showed that the CIR section with 2% binder presented thebest rutting performance under truck loading and the highest rutting sus-ceptibility under aircraft loading. Conversely, the CIR section with 3%binder presented the highest cracking resistance under both truck and air-craft loading. |
| 总页数： | 144 pages |
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