Experimental Investigation on Water Loss and Stiffness of CBTM Using Different RA Sources

Cold recycling of reclaimed asphalt (RA) is a promising technique to build or maintain roads, combining performance and environmental advantages. Although this has been extensively used worldwide, there no unique internationally-shared method characterize cold recycled mixtures. The previous work the RILEM TC 237-SIB TG6 successfully attempted different RA sources with both traditional parameters (gradation, bitumen content geometrical properties) non-conventional properties (fragmentation strength testing). current 264-RAP TG1 mainly focuses on influence physical mechanical characteristics cement-bitumen treated materials (CBTM) using foam emulsified bitumen, taking into consideration compaction curing methods. This paper presents results from first step inter-laboratory project in which foamed cement were as binders. two sources, one Alabama (USA) San Marino, investigated through collaboration several laboratories. Specimens manufactured same diameter by means Marshall gyratory compactors then cured following procedures: free surface drying (FSD) partially-surface (PSD). A preliminary study allowed obtaining specimens similar volumetric properties. Along compactability water loss, indirect tensile stiffness modulus was measured analyzed. have shown that source procedure CBTM