Kouno Tetsuya, Qiu Yu, Ichihashi Toshiya
Academic Assembly Faculty of Sustainable Design, University of Toyama, 3190 Gofuku, Toyama, Toyama Prefecture, 930-8555, Japan.
University of Toyama Graduate School of Science and Engineering, 3190 Gofuku, Toyama, Toyama Prefecture, 930-8555, Japan.
Sci Rep. 2025 Sep 1;15(1):32148. doi: 10.1038/s41598-025-16991-6.
Components exposed to soil and water are difficult to maintain during their service life, and have traditionally been designed to ensure greater durability than components exposed to air. However, in recent years, severe damage caused by aging has also been observed in components exposed to soil and water, prompting the development of methods to achieve higher durability. To address this issue, the authors developed a method (mixing method) that enhances the durability of concrete components by mixing sodium silicate-based impregnation materials with fresh concrete. In this study, the flowability, deterioration inhibition effects, and mechanical properties of concrete prepared using the mixing method were experimentally confirmed. The results demonstrated that by controlling the addition of the impregnation material, it is possible to achieve deterioration suppression effects equivalent to or superior to those of conventional methods without significantly reducing the workability or mechanical properties. In addition, an equation for estimating the mechanical properties expressed from the amount of admixture was proposed. Based on the results of this study, it is considered that the mixing method can be applied as a method for maintaining and improving the durability of concrete structures. In order to put this into practical use, it is necessary to conduct experiments under a wider range of conditions to improve the accuracy of estimating the deterioration suppression effect and the characteristics that appear, and to expand the range of applications.
暴露于土壤和水中的部件在其使用寿命期间难以维护，传统上其设计旨在确保比暴露于空气中的部件具有更高的耐久性。然而，近年来，在暴露于土壤和水中的部件中也观察到了因老化而导致的严重损坏，这促使人们开发提高耐久性的方法。为了解决这个问题，作者开发了一种方法（混合法），通过将硅酸钠基浸渍材料与新鲜混凝土混合来提高混凝土部件的耐久性。在本研究中，通过实验证实了使用混合法制备的混凝土的流动性、劣化抑制效果和力学性能。结果表明，通过控制浸渍材料的添加量，可以在不显著降低工作性或力学性能的情况下，实现与传统方法相当或更优的劣化抑制效果。此外，还提出了一个根据外加剂用量估算力学性能的公式。基于本研究结果，认为混合法可作为一种维持和提高混凝土结构耐久性的方法应用。为了将其实际应用，有必要在更广泛的条件下进行实验，以提高劣化抑制效果和出现的特性的估算精度，并扩大应用范围。
