Mechanical properties of coarse aggregates stabilized with traditional and nontraditional additives: stiffness, deformation, resistance to freezing and stripping
The dataset derives from a thorough laboratory research encompassing all the existing types of binder technologies that can stabilize coarse-graded aggregates. Both traditional and nontraditional technologies are investigated. The stabilizers are cement (CEM), bitumen (BIT), brine salt (two types, SAL-A, SAL-B), bentonite (BEN), lignosulphonate (LIG), reduced sugar (SUG), petroleum resin (RES), polyurethane (POL), acrylate (ACR), styrene butadiene (STB) and acetate (two types, ACE-A and ACE-B). Untreated aggregates, namely unbound granular material (UGM), are also tested to provide a baseline. Four laboratory test operations are performed: Repeated Load Triaxial Test (RLTT) both before and after the action of 10 Freeze-Thaw (FT) cycles, weight measurement of Marshall specimens during 10 FT cycles and a modified version of Rolling Bottle Test (RBT). The total number of samples created and tested is: 28 RLTT samples (2 replicates), 39 Marshall samples (3 replicates) and 588 RBT samples (3 replicates). This dataset reports raw data and pictures for every specimen. RLTTs are performed following the code “EN 13286-7 Cyclic load triaxial test for unbound mixtures” according to Multi-Stage Low Stress Level (MS LSL) testing procedure. The particle size distribution of the aggregates is coarse-graded and is comprised between 0 mm and 32 mm. The RLTT samples are tested both before and after the exposure to 10 FT cycles. The spreadsheets showing the RLTTs results report the dynamic stress and the triaxial stress exerted in the testing device and the axial strains and the radial strains measured by a total of six Linear Variable Differential Transformers (LVDTs). Marshall specimens containing the different binder technologies are created using the procedure traditionally adopted for asphalt mixtures as indicated in the code “EN 12697-30 Specimen preparation by impact compactor”. The aggregates have uniform coarse gradation comprised between 4 mm and 8 mm. The Marshall samples are exposed to 10 FT cycles and the weight loss is measured after every cycle. The modified version of RBT described by the code “EN 12697-11 Determination of the affinity between aggregate and bitumen” refers to weighing the mass of aggregates completely covered by the selected additive before and after rotations according to fourteen different time intervals: 1 h, 2 h, 3 h, 4 h, 5 h, 6 h, 7h, 8 h, 10 h, 12 h, 14h, 16 h, 20 h and 24 h.