Enhancing intermediate temperature fracture resistance of stone matrix asphalt with untreated recycled concrete aggregate-Experimental dataset

Abstract

This data article presents details on the assessment of fracture parameters of laboratory asphalt mixtures produced using both natural and recycled concrete aggregates. The gap-graded stone matrix asphalt (SMA) is created by incorporating Trinidad Lake Asphalt (TLA) binder with carefully calibrated mixtures of recycled concrete aggregates (0 %, 10 %, 35 %, and 50 %) and natural aggregates (limestone and dust filler). The dataset variables were chosen based on the specifications of the single-edge notched beam (SENB) and semi-circular bending (SCB) tests, which are currently used for quality control and assurance (QC & QA) assessment of asphalt concrete mixtures. The data parameters provided include air void content, voids in mineral aggregates, voids filled with asphalt, density, Marshall Stability, Flow, test temperature, peak loads, RCA content, and notch depths. The fracture resistance of the mixes was studied by analysing the fracture energy, tensile strength, and fracture toughness for the collected dataset. The data shows that incorporating up to 10 % of RCA into SMA mixes, similar fracture properties can be achieved compared to traditional SMA mixtures. This presents a sustainable and environmentally advantageous option, however, it is important to exercise caution as the RCA content increases.

Keywords: Asphalt concrete; Fracture resistance; Pavement materials; Recycled concrete aggregate; Stone matrix asphalt; Sustainability.

Graph 1

Gradation of SMA asphalt concrete mixtures.

Fig. 1

Sample preparation setup (a) roller compactor (b) gyratory compactor (c) SENB (d) SCB.

Fig. 2

Setup of the (a) SCB and (b) SENB tests.