Laboratory Evaluation of Hot Asphalt Concrete Properties with Cuban Recycled Concrete Aggregates

Debora Acosta Alvarez,Antonio Tenza-Abril,Anadelys Alonso Aenlle

doi:10.3390/su10082590

Debora Acosta Alvarez, Antonio Tenza-Abril + Show 1 more

Open Access

https://doi.org/10.3390/su10082590

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Abstract

Recycled Aggregates (RA) from construction and demolition waste (CDW) are a technically viable alternative to manufacture of asphalt concrete (AC). The main objective of this work is to evaluate the properties of hot asphalt mixtures that have been manufactured with different sources of CDW (material from concrete test specimens, material from the demolition of sidewalks and waste from prefabrication plants) from Cuba. Dense asphalt mixtures were manufactured with a maximum aggregate size of 19 mm, partially replacing (40%) the natural aggregate fraction measured between 5 mm and 10 mm with three types of RA from Cuba. Marshall specimens were manufactured to determine the main properties of the AC in terms of density, voids, stability and deformation. Additionally, the stiffness modulus of the AC was evaluated at 7 °C, 25 °C and 50 °C. The results corroborate the potential for using these sources of CDW from Cuba as a RA in asphalt concrete, thereby contributing an important environmental and economic benefit.

Highlights

Natural aggregates are a fundamental part of construction processes and they are essential to ensure the proper function of structural elements
Given the demand for natural resources and the scarcity caused by overexploitation, alternative materials have been analyzed as a potential replacement
Hot asphalt concrete mixtures manufactured with recycled aggregate from three different sources were evaluated

Summary

Introduction

Natural aggregates are a fundamental part of construction processes and they are essential to ensure the proper function of structural elements. Given the demand for natural resources and the scarcity caused by overexploitation, alternative materials have been analyzed as a potential replacement. The key challenge is to use alternatives that do not alter the quality and functionality of the different structures [1,2,3]. Recycling and/or reusing construction and demolition waste (CDW) is an important issue to foster sustainable development and has become a focus of research efforts in recent years [4]. The use of waste generated in construction and demolition activities has become a technically viable alternative for the construction of road pavements [5,6,7]

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