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Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200 and 1000°C
The fire performance of magnesium potassium phosphate cement (MKPC) binders blended with fly ash (FA) and ground granulated blast furnace slag (GBFS) was investigated up to 1000°C using X-ray diffraction, thermogravimetric analysis and SEM techniques. The FA/MKPC and GBFS/MKPC binders dehydrate above 200°C to form amorphous KMgPO 4 , concurrent with volumetric and mass changes. Above 1000°C, additional crystalline phases were formed and microstructural changes occurred, although no cracking or spalling of the samples was observed. These results indicate that FA/MKPC and GBFS/MKPC binders are expected to have satisfactory fire performance under the fire scenario conditions relevant to the operation of a UK or other geological disposal facility.
Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200 and 1000°C
The fire performance of magnesium potassium phosphate cement (MKPC) binders blended with fly ash (FA) and ground granulated blast furnace slag (GBFS) was investigated up to 1000°C using X-ray diffraction, thermogravimetric analysis and SEM techniques. The FA/MKPC and GBFS/MKPC binders dehydrate above 200°C to form amorphous KMgPO 4 , concurrent with volumetric and mass changes. Above 1000°C, additional crystalline phases were formed and microstructural changes occurred, although no cracking or spalling of the samples was observed. These results indicate that FA/MKPC and GBFS/MKPC binders are expected to have satisfactory fire performance under the fire scenario conditions relevant to the operation of a UK or other geological disposal facility.
Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200 and 1000°C
Gardner, L. J. (author) / Lejeune, V. (author) / Corkhill, C. L. (author) / Bernal, S. A. (author) / Provis, J. L. (author) / Stennett, M. C. (author) / Hyatt, N. C. (author)
2015-10-01
Gardner , L J , Lejeune , V , Corkhill , C L , Bernal , S A , Provis , J L , Stennett , M C & Hyatt , N C 2015 , ' Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200 and 1000°C ' , Advances in Applied Ceramics , vol. 114 , no. 7 , pp. 386-392 . https://doi.org/10.1179/1743676115Y.0000000064
Article (Journal)
Electronic Resource
English