Evaluation of Recycled Cement Concrete (RCC) as Filler for Asphalt Mixture

Inaayah Kareem, Abbaas

	Evaluation of Recycled Cement Concrete (RCC) as Filler for Asphalt Mixture
Journal of Engineering and Sustainable Development
Article 1, Volume 18, Issue 5, 2014, Pages 197-214
Author
Abbaas Inaayah Kareem
Abstract
The main objective of the present study is to evaluate the potential use of recycled cement concrete (RCC) as filler for asphalt mixture. The large amount of construction and demolition (C&D) waste of cement concrete especially after 2003 may produce many serious landfill problems and cause environmental pollution. It is necessary to reuse this waste material to avoid such problems. In this study the recycled cement concrete (RCC) is used as filler for asphalt mixture. Laboratory tests undertaken include Marshall tests to determine the optimum asphalt content (OAC) for control and alternative mix, x-ray diffraction test, chemical composition test, scanning electron microscopy (SEM) test and static creep test. The results show that the recycled cement concrete (RCC) as filler has lower calcite (CaCO3) percent and higher quartz (SiO2) percent than ordinary portland cement. The results also indicate that the application of recycled cement concrete as filler for hot mix asphalt can improve the rutting resistance and stiffness modulus and reduce permanent strain especially in hot region. It was also concluded that the use of RCC as filler for asphalt mixture needs projects with good quality control to avoid bad compaction in the field, so it is not recommended to use this material in projects where bad quality control is exists.
Keywords
Recycled cement concrete; Filler; Asphalt Mixture; D waste; chemical composition test; ray diffraction test; scanning electron microscopy

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