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Half Warm Mix Recycling Asphalt in urban roads (ESR6)

José Manuel Lizárraga López

SACYR CONSTRUCCIÓN

March 2nd-2015

Objectives

Producing HWMRA 100% and 70% RAP

1. Development of an specific procedure to design HWMRA with different percentage of RAP

2. Mechanical characterization of these mixes to validate the mechanical performance on wearing courses in urban streets.

3. Validation of the technology asphalt under real conditions through the construction of urban test sections.

Technology of manufacturing of half-warm recycled asphalt mixture at total rate (100% RAP)

The correct handling of the stockpiles is critical to avoid segregation and contamination

This material was classified and sieved to remove any oversized particles and fractionated to the required nominal maximum aggregate size.

Manufacturing Process

The parallel flow dryer drum consists of two side inlet rings which together make up the heating process of RAP.

The discharge hopper has a theoretical storage capacity of 4 m3.

Overview of Asphalt Continuous Mixing Plant

Use of Infrared Termography to detect segregations during the Construction of HWMRA

Studying the long-term performance assessment of the HWMRA in CEDEX test track

Fatigue Laws of HWMRA & HMA

1.80 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.602.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

3%Emulsión

NapLog: (Deformación)

Log

N ⁰C

iclo

s

Conclusions

• We have achieved to produce, spread and compacting the half warm mix recycled asphalt with total recovery rate (100%RAP) for wearing courses in urban asphalt roads according to General Technical Specifications for road and bridges in Spain (PG-3).

Acknowledgements

The research presented in this presentation was carried out as part of the Marie Curie Initial Training Network (ITN) action, FP7-PEOPLE-2013-ITN. This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement number 607524.