Cold recycled material (CRM) is considered one of the most innovative and green road materials. CRM offers many advantages over the traditional Hot Asphalt Mix (HMA). However, due to the presence of water in its composition, cement is usually incorporated as a co-binder, but it could have a detrimental impact as it can contribute to increasing the drying shrinkage, which in turn can lead to brittle behavior when it is subjected to high strain load cycles. This research paper presents a study on the mechanical properties and shrinkage behavior of CRM stabilized with different active fillers. To address this issue, cylindrical and prism specimens of CRM mixtures and their mortar were prepared respectively. Indirect tensile strength (dry and wet) and water loss over time were conducted on mixture specimens while drying shrinkage measurements tests were performed on a mortar scale. Results show that CRM mix/mortar with ET filler exhibited superior drying shrinkage characteristics along with comparable mechanical properties compared with the cement stabilized mixture.

Cold Recycled Materials; drying shrinkage behavior; water damage resistance; shaking abrasion; Active Fillers