Inazumi Shinya, Hashimoto Ryo, Shinsaka Takashi, Nontananandh Supakij, Chaiprakaikeow Susit
Department of Civil Engineering, Shibaura Institute of Technology, Toyosu Campus, Tokyo 135-8548, Japan.
Doboku Chishitsu Co. Ltd., Sendai 981-3107, Japan.
Materials (Basel). 2021 Sep 9;14(18):5169. doi: 10.3390/ma14185169.
As a solidifying material for ground improvement using inorganic waste as a raw material, the authors have been developing an additive mixture of the fine powder of waste glass containing a large amount of silica generated during the production of glass cullet and an alkaline aid (heat-treating type of "Earth-Silica; ES" additive). Furthermore, a solidifying material that solidifies by mixing this additive with the fine powder of blast furnace slag, which is a by-product of steel production, is also being developed. In this study, the authors reviewed the mixing process of the solidified materials, especially the one made with the heat-treating type of ES additive, omitting the heat treatment of the fine powder of waste glass and the alkaline aid and applying only the mixing treatment. As a result, a mixing type of ES additive was manufactured to simplify the manufacturing process, and the difference in the performance of the solidifying material, depending on the presence or absence of the heat-treating process during the additive manufacturing, was verified in terms of the effect on the solidifying action. Specifically, the solidifying materials to which the heat-treating type of ES additive and the mixing type of ES additive were added, respectively, were applied to the high-pressure injection stirring method, one of the ground-improvement methods. Various tests clarified the changes in viscosity of these solidifying materials over time and the acceleration of their solidifying rates when adding ordinary Portland cement separately.
作为一种以无机废弃物为原料进行地基改良的固化材料，作者一直在研发一种添加剂混合物，该混合物由碎玻璃生产过程中产生的含有大量二氧化硅的废玻璃细粉和一种碱性助剂（热处理型“土硅；ES”添加剂）组成。此外，还在研发一种通过将这种添加剂与钢铁生产副产品高炉矿渣细粉混合而固化的固化材料。在本研究中，作者回顾了固化材料的混合过程，特别是采用热处理型ES添加剂的混合过程，省略了废玻璃细粉和碱性助剂的热处理，仅进行混合处理。结果，制造出了一种混合型ES添加剂以简化制造工艺，并从对固化作用的影响方面验证了添加剂制造过程中热处理与否对固化材料性能的差异。具体而言，分别添加了热处理型ES添加剂和混合型ES添加剂的固化材料被应用于地基改良方法之一的高压喷射搅拌法。各种测试阐明了这些固化材料随时间的粘度变化以及单独添加普通硅酸盐水泥时其固化速率的加快情况。
