Early age hydration and application of blended magnesium potassium phosphate cements for reduced corrosion of reactive metals

被引：52

作者：

Gardner, Laura J. ^{[1
]}

Corkhill, Claire L. ^{[1
]}

Walling, Sam A. ^{[1
]}

Vigor, James E. ^{[1
]}

Murray, Claire A. ^{[2
]}

Tang, Chiu C. ^{[2
]}

Provis, John L. ^{[1
]}

Hyatt, Neil C. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Sci & Engn, Immobilisat Sci Lab, Sheffield S1 3JD, S Yorkshire, England

[2] Diamond Light Source, Diamond House,Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England

来源：

CEMENT AND CONCRETE RESEARCH | 2021年 / 143卷 / 143期

基金：

英国工程与自然科学研究理事会;

关键词：

Chemically bonded ceramics; Calorimetry; Hydration; X-ray diffraction; Radioactive waste; BLAST-FURNACE SLAG; MECHANICAL-PROPERTIES; POWDER DIFFRACTION; WATER-RESISTANCE; RAPID REPAIR; LIQUID WATER; FLY-ASH; PART; DURABILITY; URANIUM;

D O I：

10.1016/j.cemconres.2021.106375

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Magnesium potassium phosphate cements (MKPC) were investigated to determine their efficacy towards retardation of reactive uranium metal corrosion. Optimised low-water content, fly ash (FA) and blast furnace slag (BFS) blended MKPC formulations were developed and their fluidity, hydration behaviour, strength and phase assemblage investigated. In-situ time resolved synchrotron powder X-ray diffraction was used to detail the early age (similar to 60 h) phase assemblage development and hydration kinetics, where the inclusion of BFS was observed to delay the formation of struvite-K by similar to 14 h compared to FA addition (similar to 2 h). All samples set within this period, suggesting the possible formation of a poorly crystalline binding phase prior to struvite-K crystallisation. Longterm corrosion trials using metallic uranium indicated that MKPC systems are capable of limiting uranium corrosion rates (reduced by half), when compared to a UK nuclear industry grout, which highlights their potential application radioactive waste immobilisation.

引用

页数：13

共 69 条

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