Stabilisation/Solidification of soils contaminated by mining activities: Influence of barite powder and grout content on γ-radiation shielding, unconfined compressive strength and ²³²Th immobilisation

详细信息    查看全文

• 作者：Pietro P. Falciglia^a ; ^b ; ^{ppfalci@dica.unict.it} ; Stefano Romano^b ; ^c ; Federico G.A. Vagliasindi^a
• 关键词：232-Thorium ; γRS index ; Contaminant immobilisation ; High-density barite powder ; Stabilisation/solidification
• 刊名：Journal of Geochemical Exploration
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：174
• 期：Complete
• 页码：140-147
• 全文大小：576 K
• 卷排序：174

文摘

We investigate the influence of barite and grout content in S/S of 232Th-contaminated soils. We assess γ-ray shielding effectiveness as γRS index, UCS and contaminant immobilisation. Replacement of PC by barite (Ba) up to a maximum of 50% increases γRS index. The use of Ba in PC grout allows the achievement of the almost total 232Th-immobilisation. Results reveal the mixture PC:Ba = 1:1 with S:G = 2:1 as the optimal choice.