Leon Lee P, Smith Jovanca, Martin Hector
Department of Civil and Environmental Engineering, The Faculty of Engineering, The University of West Indies, St. Augustine 32080, Trinidad and Tobago.
Department of Civil Engineering, Queen's University Belfast, University Belfast, United Kingdom.
Data Brief. 2024 Jul 14;55:110744. doi: 10.1016/j.dib.2024.110744. eCollection 2024 Aug.
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.
本文献数据详细介绍了对使用天然和再生混凝土集料生产的实验室沥青混合料的断裂参数评估。间断级配的石屑沥青玛蹄脂碎石混合料（SMA）是通过将特立尼达湖沥青（TLA）结合料与精心校准的再生混凝土集料（0%、10%、35%和50%）和天然集料（石灰石和矿粉）的混合物混合而成。数据集变量是根据单边缺口梁（SENB）和半圆弯曲（SCB）试验的规范选择的，目前这些试验用于沥青混凝土混合料的质量控制和保证（QC&QA）评估。提供的数据参数包括空隙率、矿料间隙率、沥青填隙率、密度、马歇尔稳定度、流值、试验温度、峰值荷载、再生混凝土集料（RCA）含量和缺口深度。通过分析所收集数据集的断裂能、抗拉强度和断裂韧性，研究了混合料的抗断裂性能。数据表明，在SMA混合料中掺入高达10%的RCA，与传统SMA混合料相比，可以实现相似的断裂性能。这提供了一个可持续且对环境有利的选择，然而，随着RCA含量的增加，谨慎操作很重要。
