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Accession Number DE2012-1053586
Title Relationship between Flowability and Tank Closure Grout Quality.
Publication Date Oct 2012
Media Count 18p
Personal Author C. Langton D. Stefanko M. Hay
Abstract After completion of waste removal and chemical cleaning operations, Tanks 5-F and 6-F await final closure. The project will proceed with completing operational closure by stabilizing the tanks with grout. Savannah River Remediations (SRR) experience with grouting Tanks 18-F and 19-F showed that slump-flow values were correlated with flow/spread inside these tanks. Less mounding was observed when using grouts with higher slump-flow. Therefore, SRNL was requested to evaluate the relationship between flowability and cured properties to determine whether the slump-flow maximum spread of Mix LP No. 8-16 could be increased from 28 inches to 30 inches without impacting the grout quality. A request was also made to evaluate increasing the drop height from 5 feet to 10 feet with the objective of enhancing the flow inside the tank by imparting more kinetic energy to the placement. Based on a review of the grout property data for Mix LP no. 8-16 collected from Tank 18-F and 19-F quality control samples, the upper limit for slump-flow measured per ASTM C 1611 can be increased from 28 to 30 inches without affecting grout quality. However, testing should be performed prior to increasing the drop height from 5 to 10 feet or observations should be made during initial filling operations to determine whether segregation occurs as a function of drop heights between 5 and 10 feet. Segregation will negatively impact grout quality. Additionally, increasing the delivery rate of grout into Tanks 5-F and 6-F by using a higher capacity concrete/grout pump will result in better grout spread/flow inside the tanks.
Keywords Cleaning
Compressive strength
Kinetic energy
Quality control
Radioactive waste disposal
Savannah River National Laboratory

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 77G - Radioactive Wastes & Radioactivity
Corporate Author Department of Energy, Aiken, SC. Savannah River Site.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1308
Contract Number DE-AC09-08SR22470

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