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Pavements 2025

Innovative Sustainable Methods, Materials, and Recycling

POSTER RECEPTION (View list of posters here)

Resilient modulus characteristics of cement-treated recycled concrete aggregates

Tuesday, June 10, 2025

4:45 PM – 6:00 PM MT

Primary Author(s)

Zainul Abedin Khan

Joint Doctoral Student
Department of Civil Engineering, Indian Institute of Technology, Hyderabad, Sangareddy, Telangana 502284, India; and School of Engineering, Deakin University, 3216, VIC, Australia
Sangareddy, Telangana, India

Presenter(s)

Zainul Abedin Khan

Joint Doctoral Student
Department of Civil Engineering, Indian Institute of Technology, Hyderabad, Sangareddy, Telangana 502284, India; and School of Engineering, Deakin University, 3216, VIC, Australia
Sangareddy, Telangana, India

Co-Author(s)

UB

Umashankar Balunaini, n/a

Professor
Department of Civil Engineering, Indian Institute of Technology, Hyderabad, Sangareddy, Telangana 502284, India
Sangareddy, Telangana, India
SC

Susanga Costa, n/a

Senior Lecturer
School of Engineering, Deakin University, 3216, VIC, Australia
Melbourne, Victoria, Australia
NN

Nhu H.T. Nguyen, n/a

Lecturer
School of Engineering, Deakin University, 3216, VIC, Australia
Melbourne, Victoria, Australia

Submitter(s)

Zainul Abedin Khan

Joint Doctoral Student
Department of Civil Engineering, Indian Institute of Technology, Hyderabad, Sangareddy, Telangana 502284, India; and School of Engineering, Deakin University, 3216, VIC, Australia
Sangareddy, Telangana, India

Abstract: The construction and demolition activities have been increasing drastically due to rapid expansion of infrastructures and generated enormous volume of concrete wastes. The generated concrete wastes are typically dumped into the landfills resulting in numerous negative environmental impacts. Whereas, it can be recycled into different size of recycled concrete aggregates (RCA). RCA can be employed in construction of pavement base and subbase layers and lower the demand of virgin aggregates. In this study, unbound RCA has met the particle-size distribution, Los Angeles abrasion, aggregate impact value criteria in accordance with various road standards such as Indian road congress and the American Association of State Highway and Transportation Officials (AASTHO) for pavement base/subbase layer materials. This study investigates the resilient modulus characteristics of cement-treated (3, 5 and 7% cement content by weight of dry aggregates) RCA for base/subbase layer applications. Resilient modulus tests were performed under varying stress levels and cement contents to evaluate the materials behavior under cyclic loading conditions. The results showed an increase in the resilient modulus values with increasing cement content. For the treated samples considered in the study, 7% cement-treated RCA showed maximum resilient modulus value (686 MPa) at 7 days of curing. Additionally, impact of longer curing time on resilient modulus characteristics were investigated and found that resilient modulus values typically enhanced with increasing curing period. Overall, the findings suggest that RCA has shown sufficient gradation, abrasion, impact value and resilient modulus characteristics to be use in pavement base and subbase layers as a viable substitute for virgin aggregates. RCA can be a sustainable alternative of virgin aggregates, offers potential benefits in terms of sustainability and conservation of natural resources.

Learning Objectives:

Attendees can expect to learn the following from this session:

Assess the improvement in the resilient modulus characteristics of cement-treated recycled concrete aggregate (RCA) with increasing cemnet content for the application in pavement base/subbase layers.
Investigate how the cement-treated RCA behaves under cyclic loading at different stress conditions and and evalaute the feasibility for pavement base/subbase layers.
RCA can be a viable alternative of virgin aggregates for the construction of sustainable pavement base/subbase layers.