Supplementary data for the paper: "Investigation of Polyurethane-shelled Microcapsules for Self-Sealing Concrete Applications Exposed to Aggressive Environments"

Supplementary data for the paper: "Investigation of Polyurethane-shelled Microcapsules for Self-Sealing Concrete Applications Exposed to Aggressive Environments"Open data concerning experimental work. This study evaluates polyurethane-shelled microcapsules containing a commercial water-repellent agent (WRA) as an autonomous self-sealing system for concrete in aggressive environments. Microcapsules (MIC) were synthesised via membrane emulsification and interfacial polymerisation, yielding a D50 of 77 µm and sufficient integrity for concrete incorporation. An optimisation study identified 2 by weight of cement (bwoc) % as the optimal dosage, balancing hydrophobic performance and mechanical properties. Cracked (100 and 300 µm) and uncracked specimens were exposed to freeze–thaw cycles with de-icing salts (FT), artificial seawater (MAR), and a chloride-rich solution (Cl). They were compared to the reference (REF) concrete.本数据集为论文《侵蚀环境下用于混凝土自密封的聚氨酯壳微胶囊研究》的配套补充数据，包含实验相关公开数据。本研究针对侵蚀环境下混凝土的自主自密封体系，对负载商用防水剂（Water-repellent agent, WRA）的聚氨酯壳微胶囊展开性能评估。微胶囊（Microcapsules, MIC）通过膜乳化与界面聚合法合成，粒径中值D50为77 μm，且具备足够的结构完整性以适配混凝土掺合。优化试验确定最佳掺量为水泥质量的2%（by weight of cement, bwoc），可在疏水性能与力学性能之间取得最优平衡。本试验对裂缝宽度分别为100 μm和300 μm的开裂试件及未开裂试件，分别开展三类侵蚀环境暴露试验：含除冰盐的冻融循环（Freeze-thaw cycles with de-icing salts, FT）、人工海水（Artificial seawater, MAR）以及富氯溶液（Chloride-rich solution, Cl），并以基准混凝土（Reference concrete, REF）作为对照试件。