Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200 and 1000°C

L. J. Gardner; V. Lejeune; C. L. Corkhill; S. A. Bernal; J. L. Provis; M. C. Stennett; N. C. Hyatt

doi:10.1179/1743676115Y.0000000064

Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200 and 1000°C

L. J. Gardner, V. Lejeune, C. L. Corkhill, S. A. Bernal, J. L. Provis, M. C. Stennett, N. C. Hyatt^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

33 Citations (Scopus)

Abstract

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 KMgPO₄, 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.

Original language	English
Pages (from-to)	386-392
Number of pages	7
Journal	Advances in Applied Ceramics
Volume	114
Issue number	7
DOIs	https://doi.org/10.1179/1743676115Y.0000000064
Publication status	Published - Oct 2015

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Publisher Copyright:
© 2015 Institute of Materials, Minerals and Mining.

Keywords

Fire performance
Fly ash
Ground granulated blast furnace slag
MKPC
Nuclear waste

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title = "Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200 and 1000°C",

abstract = "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 KMgPO4, 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.",

keywords = "Fire performance, Fly ash, Ground granulated blast furnace slag, MKPC, Nuclear waste",

author = "Gardner, {L. J.} and V. Lejeune and Corkhill, {C. L.} and Bernal, {S. A.} and Provis, {J. L.} and Stennett, {M. C.} and Hyatt, {N. C.}",

note = "Publisher Copyright: {\textcopyright} 2015 Institute of Materials, Minerals and Mining.",

year = "2015",

month = oct,

doi = "10.1179/1743676115Y.0000000064",

language = "English",

volume = "114",

pages = "386--392",

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AU - Gardner, L. J.

AU - Lejeune, V.

AU - Corkhill, C. L.

AU - Bernal, S. A.

AU - Provis, J. L.

AU - Stennett, M. C.

AU - Hyatt, N. C.

PY - 2015/10

Y1 - 2015/10

N2 - 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 KMgPO4, 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.

AB - 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 KMgPO4, 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.

KW - Fire performance

KW - Fly ash

KW - Ground granulated blast furnace slag

KW - MKPC

KW - Nuclear waste

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DO - 10.1179/1743676115Y.0000000064

M3 - Article (Academic Journal)

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SN - 1743-6753

VL - 114

SP - 386

EP - 392

JO - Advances in Applied Ceramics

JF - Advances in Applied Ceramics

IS - 7

ER -

Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200 and 1000°C

Abstract

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Keywords

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