Characteristics of Recycled Asphalt Pavement Self-consolidating Concrete

Abstract

Self-consolidating concrete (SCC) is used nowadays in many of concrete construction projects. It has superior characteristics such as a low yield, considerable viscosity, and does not segregate, which makes it very attractive to contractors. Also, SCC is used when there is no access to vibrators or when it is difficult to vibrate to consolidate the concrete in the event of having heaving and complex reinforcements. The SCC can consolidate itself under the effect of its self-weight without the need for mechanical compaction. The aggregates are used as fillers in the concrete mixture to provide the needed volume and it is also a cheap material, but it is not renewable material. Therefore, the use of waste materials such as Recycled Asphalt Pavement (RAP) to replace a percent of the conventional aggregates can result in a more costeffective and sustainable concrete. The objective of this study is to investigate the fresh and hardened properties of SCC that contains Recycled Asphalt Pavement (RAP). A conventional control PCC SCC mixture with targeted properties is developed and its properties is altered later to produce the remaining RAP concrete mixtures. The concrete mixtures will have similar properties to the control concrete mixtures, but the percent of coarse aggregates that will be replaced by RAP will vary between 10% – 40%. After the fresh and hardened properties of SCC are measured, a set of recommendations will be presented to assist engineers to determine the suitable percentage by which coarse aggregates can be replaced with RAP, and determine the applicability of the use of SCCRAP in different engineering applications