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Title: Development and validation of a balanced mix design approach for CIR mixtures using full-scale testing
Authors: DeCarlo, Christopher J.
Elshaer, Mohamed H.
Cox, Benjamin C.
Lein, Wade A.
Ali, Ayman
Mehta, Yusuf
Saidi, Ahmed
Keywords: Aggregates (Building materials)
Asphalt emulsion mixtures--Evaluation
Binders (Materials)
Bituminous materials
Pavements, Asphalt--Maintenance and repair
Pavements, Asphalt--Recycling
Publisher: Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC TR-22-21
Abstract: 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) approach. This study involved preparing and testing CIR mixtures in the lab at varying contents of bituminous additives and constant content of 1% ce-ment and 3% water. Eight combinations of CIR mixtures were produced for this study using two binders (emulsion and foamed asphalt), compaction efforts (30 and 70 gyrations), and curing processes (72 hours at 140°F and 50°F). Results showed that asphalt pavement analyzer, semicircular bend, and indirect tensile strength tests presented the highest correlation with the change of binder contents. The study successfully used the developed BMD for designing CIR mixtures and selecting their optimum binder contents. It then used three balanced CIR mixtures to construct full-scale pavement sections to validate the BMD approach in the field. A heavy vehicle simulator was used to apply different accelerated loadings on each section. Results showed that the CIR section with 2% binder presented the best rutting performance under truck loading and the highest rutting susceptibility under aircraft loading. Conversely, the CIR section with 3% binder presented the highest cracking resistance under both truck and aircraft loading.
Description: Technical Report
Gov't Doc #: ERDC TR-22-21
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Technical Report

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