Park Byoungsun, Choi Youngcheol
Department of Environmental Systems Engineering, Sejong Campus, Korea University, Sejong-si 30019, Korea.
Department of Civil and Environmental Engineering, Gachon University, Seongnam 13120, Korea.
Nanomaterials (Basel). 2021 Jun 21;11(6):1622. doi: 10.3390/nano11061622.
In this study, we investigated the effects of mineral admixtures on the autogenous healing of flexural mortar members through a chloride ion penetration test. The mineral admixtures used were ground granulated blast-furnace slag (GGBS), fly ash, silica fume (SF), clinker binder, and clinker sand. Through a four-point bending test, a crack of approximately 100 μm was induced at the bottom of the flexural mortar member, and the chloride ion penetration depth through the crack was measured to evaluate the self-healing performance. Additionally, we analyzed the correlation between the self-healing performances, which was measured through water flow and water absorption tests. The experimental results showed that the chloride ion penetration depth decreased due to crack healing, and the self-healing performance of the GGBS and SF was the highest. It was found that the subtle change in the self-healing performance was more accurately evaluated by the chloride ion penetration test.
在本研究中，我们通过氯离子渗透试验研究了矿物掺合料对弯曲砂浆构件自愈合的影响。所使用的矿物掺合料有磨细粒化高炉矿渣（GGBS）、粉煤灰、硅灰（SF）、熟料粘结剂和熟料砂。通过四点弯曲试验，在弯曲砂浆构件底部诱导出一条约100μm的裂缝，并测量通过该裂缝的氯离子渗透深度以评估自愈合性能。此外，我们分析了通过水流和吸水率试验测得的自愈合性能之间的相关性。实验结果表明，由于裂缝愈合，氯离子渗透深度降低，且GGBS和SF的自愈合性能最高。结果发现，通过氯离子渗透试验能更准确地评估自愈合性能的细微变化。
