Civil Engineering ETDs

Publication Date

Fall 11-15-2024

Abstract

Cold mix asphalt (CMA) technologies are being used in the United States and have environmental benefits. However, these technologies are not fully developed. We do not yet know their resilient and dynamic modulus, which are important for designing pavement thickness. They have not being used widely because we do not know also their performance. This study looks at three Cold Central Plant Recycling (CCPR) materials to help fill this gap. We conducted several lab tests, including the Hamburg Wheel Tracking Test (HWTT), Semi-Circular Bending Test (SCB), and Texas Overlay Test (TOT). We also tested the mechanical properties of the CCPR materials using the Resilient Modulus Test (MR), Dynamic Modulus Test (|E*|), and Creep Compliance Test (D(t)). All three CCPR materials showed that their resilient modulus increases as the deviator stress increases. Results showed that more than 75% of the CCPR specimens did not meet the required 20,000 loading cycles in the HWTT, exceeding the 25 mm rut depth limit. The tests also showed the effect of higher wheel loads. Overall, the CCPR materials had similar results across tests, suggesting that further research is needed to compare their long-term performance in the field.

Keywords

CCPR, cold central plant recycling, asphalt rehabilitation, cold mix asphalt

Document Type

Thesis

Language

English

Degree Name

Civil Engineering

Level of Degree

Masters

Department Name

Civil Engineering

First Committee Member (Chair)

Dr. Rafiqul A. tarefder

Second Committee Member

Dr. Maryam Hojati

Third Committee Member

Dr. Madura Pathirage

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