Autoradiographic imaging of the spatial distribution of Cl-36 in concrete

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-23 DOI:10.1016/j.conbuildmat.2024.139279

Juuso Sammaljärvi , Xiaodong Li , Stéphane Gaboreau , Stéphanie Betelu , Jérôme Donnard , Paul Sardini , Marja Siitari-Kauppi , Pierre Henocq

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引用次数: 0

Abstract

In this study, the transport properties of tritiated water (HTO) and Cl-36 in two different concretes were investigated. The spatial distribution of porosity and radionuclide retention within the studied materials were studied via C-14-Polymethylmethacrylate (C-14-PMMA) autoradiography and Cl-36 autoradiography, respectively. Diffusion experiments and modelling methods were used to calculate the effective diffusion coefficients and distribution coefficients of the tracers. The diffusivities of HTO and Cl-36 were considerably lower in mixed cement (CEMV)-based concrete than in Portland cement (CEMI)-based concrete. Autoradiography-based Cl-36 post-mortem examination revealed important distinctions explaining the diffusion behaviour between the two concrete materials. While there was considerable retention in both, in CEMV-based concrete, the diffusion was considerably slower than in CEMI-based concrete. Overall, the post-mortem autoradiographic imaging was successful, and a similar approach is probably applicable to other radionuclides.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.