Advances in the Study of the Behavior of Full-Depth Reclamation (FDR) with Cement

Hernán Gonzalo-Orden,Heriberto Pérez-Acebo,Jesús Díaz-Minguela,Alaitz Linares-Unamunzaga

doi:10.3390/app9153055

Hernán Gonzalo-Orden, Heriberto Pérez-Acebo + Show 2 more

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https://doi.org/10.3390/app9153055

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Abstract

Road maintenance and rehabilitation are expected to meet modern society’s demands for sustainable development. Full-depth reclamation with cement as a binder is closely linked to the concept of sustainability. In addition to the environmental benefits of reusing the existing pavement as aggregate, this practice entails significant technical and economic advantages. In Spain, in the absence of tests specifically designed to determine the behavior of recycled pavements stabilized with cement, these materials are treated as soil-cement or cement-bound granular material. This assumption is not entirely accurate, because this recycled pavement contains some bituminous elements that reduce its stiffness. This study aimed to obtain the relationships between flexural strength (FS) and the parameters that describe the pavement behavior (long-term unconfined compressive strength (UCS) and indirect tensile strength (ITS)) and compare the findings with the relationships between these parameters in soil-cement and cement-bound granular materials. The results showed that the similar behavior hypothesis is not entirely accurate for recycled pavements stabilized with cement, because they have lower strength values—although, this is not necessarily an indication of poorer performance.

Highlights

Pavement recycling is a road-rehabilitation technique in which a deteriorated pavement is transformed into a new course
The results showed that the similar behavior hypothesis is not entirely accurate for recycled pavements stabilized with cement, because they have lower strength values—this is not necessarily an indication of poorer performance
This research aimed to fill the void in the understanding of the relationships among flexural strength, unconfined compressive strength, and indirect tensile strength based on the results of the strength, unconfined compressive strength, and indirect tensile strength based on the results of the tests tests conducted

Summary

Introduction

Pavement recycling is a road-rehabilitation technique in which a deteriorated pavement is transformed into a new course. Depending on the recycling processes and mixing temperature, pavement recycling technique can be classified as hot recycling (HR) and cold recycling (CR). There are three techniques for CR according to the processing place, the construction technology, and the reclamation depth: Cold in-place recycling, cold central-plant recycling, and full-depth reclamation [1,2]. Full depth reclamation (FDR) is a recycling technique in which all the asphalt pavement section and a previously quantified amount of underlying base material are treated. This mixture is pulverized, either mixed with a stabilizing agent or not, and compacted to produce a stabilized base course [3]. If the obtained material does not provide enough structural strength, possible stabilizers are classified as

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