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Accession Number
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DE2012-1053586
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Title
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Relationship between Flowability and Tank Closure Grout Quality.
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Publication Date
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Oct 2012
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Media Count
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18p
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Personal Author
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C. Langton D. Stefanko M. Hay
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Abstract
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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.
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Keywords
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Cleaning
Closures
Compressive strength
Flowability
Grouting
Kinetic energy
Quality control
Radioactive waste disposal
Savannah River National Laboratory
Tanks
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Source Agency
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Technical Information Center Oak Ridge Tennessee
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NTIS Subject Category
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77G - Radioactive Wastes & Radioactivity
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Corporate Author
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Department of Energy, Aiken, SC. Savannah River Site.
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Document Type
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Technical report
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Title Note
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N/A
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NTIS Issue Number
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1308
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Contract Number
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DE-AC09-08SR22470
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