Thermal properties of fly ash substituted slag cement waste forms for disposal of Savannah River Plant salt waste

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6453172

Roy, D M; Kaushal, S; Licastro, P H; Langton, C A

Waste processing at the Savannah River Plant will involve reconstitution of the salts (NaNO/sub 3/, NaNO/sub 2/, NaOH, etc.) into a concentrated solution (32 weight percent salts) followed by solidification in a cement-based waste form for burial. The stability and mechanical durability of such a 'saltstone monolith' will depend largely on the temperature reached due to heat of hydration and the thermal properties of the waste form. Fly ash has been used as an inexpensive constituent and to moderate the hydration and setting processes so as to avoid reaching prohibitively high temperatures which could cause thermal stresses. Both high-calcium and low-calcium fly ashes have been studied for this purpose. Other constituents of these mixes include granulated blast furnace slag and finely crushed limestone. Adiabatic temperature increase and thermal conductivity of these mixes have been studied and related x-ray diffraction and scanning electron microscopy studies carried out to understand the hydration process.

• Research Organization: Pennsylvania State Univ., University Park (USA). Materials Research Lab.; Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6453172
• Report Number(s): DP-MS-85-117; CONF-851217-17; ON: DE86004893
• Country of Publication: United States
• Language: English

Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ADDITIVES
AEROSOL WASTES
ASHES
BUILDING MATERIALS
CEMENTS
DATA
EXPERIMENTAL DATA
FLY ASH
INFORMATION
MANAGEMENT
MATERIALS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PORTLAND CEMENT
PROCESSING
RESIDUES
SALTS
SAVANNAH RIVER PLANT
SLAGS
SOLIDIFICATION
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WASTE FORMS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES