Developing Sustainable Pavement Concrete Mix Using Portland Limestone Cement and Blended Aggregates Techniques

Author:

Chung Hung-Wen1ORCID,DeFord Harvey2ORCID,Tia Mang3,Ni Frank Mi-Way2ORCID

Affiliation:

1. ECS Florida, LLC, Gainesville, FL

2. Florida Department of Transportation, State Materials Office, Gainesville, FL

3. Department of Civil Engineering, University of Florida, Gainesville, FL

Abstract

With the increasing price and carbon dioxide emission of cement comes the challenge of rigid pavement. One of the solutions to address this issue is minimizing the cementitious paste volume (CPV) of the concrete mix with the blended aggregates (BA) technique. This paper presents the effects of minimizing the CPV in Portland limestone cement (PLC) concrete with CPV reduction and BA application for Florida rigid pavement concrete. The findings indicated that reducing the CPV in the pavement concrete mix to some extent would not adversely affect the properties of the pavement concrete; the minimum CPV of PLC pavement concrete mixes can be reduced to 22.5% with no loss in the properties of fresh and hardened concrete. The other benefits of CPV reduction include low permeability and shrinkage strain. In summary, minimizing the CPV and utilizing the BA technique can be considered to design sustainable pavement concrete mixes with better pavement performance, lower materials costs, and lower global warming potential.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Civil and Structural Engineering

Reference45 articles.

1. Optimum rigid pavement design by genetic algorithms

2. Toward a better practice for estimating the CO 2 emission factors of cement production: An experience from China

3. Lobo C. L. Specifying Requirements for Concrete Mixtures. Website of Structure Magazine. https://www.structuremag.org/?p=14379. Accessed February 19, 2020.

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