Tailoring neutron-shielding boron-metakaolin geopolymers with BC filler; Surfactant-driven interfacial and microstructural control

Niu, X.*; Elakneswaran, Y.*; Kikuchi, Ryosuke*; Li, A.*; Seralathan, S.*; Hiraki, Yoshihisa; Sato, Junya; Osugi, Takeshi; Kamiyama, Takashi*; Walkley, B.*

Cement and Concrete Research, 200, p.108096_1 - 108096_17, 2026/02

https://doi.org/10.1016/j.cemconres.2025.108096

Design and characterisation of different characteristics of metakaolin-based geopolymer for fuel debris removal, 3; Application potential of domestic metakaolin products

Kikuchi, Ryosuke*; Takeuchi, Nozomi*; Elakneswaran, Y.*; Niu, X.*; Osugi, Takeshi; Sato, Junya; Hiraki, Yoshihisa; Chaerun, R. I.

no journal, , 

Technologies are required to stabilise and solidify fuel debris and contaminated water present inside the Primary Containment Vessel (PCV) of the Fukushima Daiichi Nuclear Power Plant. In this study, metakaolin, a representative reactive filler, was investigated by comparing the specifications and properties of commercially available products before and after hardening. In addition, with consideration of a stable supply of raw materials, domestically produced metakaolin was manufactured and its properties were systematically evaluated.

Design and characterisation of different characteristics of metakaolin-based geopolymer for fuel debris removal, 4; Characteristics and Hydrogen Generation of Potassium-based Geopolymers Containing Simulated Wastes

Hiraki, Yoshihisa; Sato, Junya; Chaerun, R. I.; Niu, X.*; Kikuchi, Ryosuke*; Elakneswaran, Y.*; Yoshida, Yukihiko; Osugi, Takeshi

no journal, , 

no abstracts in English

Design and characterisation of different characteristics of metakaolin-based geopolymer for fuel debris removal, 2; Interaction between metakaolin-based geopolymers and colloids

Niu, X.*; Elakneswaran, Y.*; Kikuchi, Ryosuke*; Osugi, Takeshi; Sato, Junya; Hiraki, Yoshihisa; Chaerun, R. I.

no journal, , 

In the Primary Containment Vessel (PCV) of the Fukushima Daiichi Nuclear Power Plant, fuel debris and contaminated water form a complex slurry that contains fine particles and colloids mainly composed of iron, barium, and carbonates. In this study, the physicochemical interactions, structural formation behaviour, and the effects on solidification performance were systematically evaluated when these colloids were incorporated into metakaolin-based geopolymers.