Mechanical properties of magnesium ammonium phosphate cements and their zeolite composites
Phosphate-bonded cements have been proposed as candidates for solidification and stabilization of mixed wastes. Magnesium ammonium phosphate (MAP) has been investigated as a candidate material. Detailed physical and mechanical properties of MAP cement are reported. It is synthesized by the route of reaction of calcined MgO and ammonium phosphate solution. Samples are made by setting the cement at room temperature and slight pressure. The porosity is reduced to {approximately}11% by impregnation of ammonium phosphate solution. Detailed mechanical properties such as flexural strength, fracture toughness and compression strength are reported and fracture mechanical analyses supported with scanning electron microscopy are provided. Properties of composites of these cements with zeolites, which may be used for containment of radioactive as well as chemical waste are studied. We demonstrate that the strengths of these composites compare well with portland cement even after 50% loading of zeolites. Fracture mechanical implications of such loadings are given.
- Research Organization:
- Argonne National Lab., IL (United States). Materials and Components Technology Div.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10162545
- Report Number(s):
- ANL/MCT/CP-78063; CONF-930438-21; ON: DE93015155
- Resource Relation:
- Conference: 95. annual meeting of the American Ceramic Society,Cincinnati, OH (United States),18-22 Apr 1993; Other Information: PBD: Apr 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
MAGNESIUM PHOSPHATES
PHYSICAL PROPERTIES
AMMONIUM PHOSPHATES
CEMENTS
RADIOACTIVE WASTE PROCESSING
SOLIDIFICATION
STABILIZATION
MECHANICAL PROPERTIES
COMPOSITE MATERIALS
ZEOLITES
360603
052001
WASTE PROCESSING