Optimization of hydraulic cement admixture waste forms for sodium-bearing, high aluminum, and high zirconium wastes

Conference · Fri Aug 01 04:00:00 EDT 1997

OSTI ID:543667

Herbst, A K

A three-way blend of portland cement, blast furnace slag, and fly ash was successfully tested on simulated acidic high sodium, aluminum, and zirconium low-level wastes (LLW). Grout cubes were prepared at various waste loadings to maximize loading while meeting compressive strength and leach resistance requirements. For sodium LLW, a 21% waste loading achieves a volume reduction of 3.3 and a compressive strength of 2750 pounds per square inch while meeting leach, mix, and flow requirements. It was found that the sulfur in the slag reduces the chromium leach rate below regulatory limits. For aluminum LLW, a 10% waste loading achieves a volume reduction of 8.5 and a compressive strength of 4.50 pounds per square inch while meeting leach requirements. Likewise for zirconium LLW, a 21% waste loading achieves a volume reduction of 8.3 and a compressive strength of 3570 pounds per square inch.

• Research Organization: Idaho National Engineering Lab., Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
• DOE Contract Number: AC07-94ID13223
• OSTI ID: 543667
• Report Number(s): INEL/CON--97-00334; CONF-970537--; ON: DE97053243
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
CEMENTS
COMPRESSION STRENGTH
LOW-LEVEL RADIOACTIVE WASTES
MATERIALS TESTING
RADIOACTIVE WASTE PROCESSING
WASTE FORMS