?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Immobilisation+of+caesium+in+magnesium+phosphate-based+blends&rft.creator=Yue%2C+Y&rft.creator=Zhou%2C+Q&rft.creator=Bai%2C+Y&rft.creator=Li%2C+L&rft.creator=Song%2C+J&rft.creator=You%2C+C&rft.creator=Qian%2C+J&rft.creator=McCague%2C+C&rft.creator=Jin%2C+F&rft.creator=Al-Tabbaa%2C+A&rft.creator=Mo%2C+L&rft.creator=Deng%2C+M&rft.description=Disposal+of+Caesium+(Cs)+by+incorporating+it+into+host+matrices+has+been+proved+as+a+promising+concept.%0D%0AEven+though+Portland+cement+(PC)+based+systems+can+be+used+to+encapsulate+low+(LLW)+or+intermediate%0D%0Alevel+waste+(ILW)%2C+they+are+not+efficient+for+immobilising+Cs+due+to+the+very+high+water-solubility+of+Cs.%0D%0AMagnesium+phosphate+cement+(MPC)%2C+a+chemically+bonded+ceramic+consists+of+struvite+families+produced+by%0D%0Athe+acid+based+reactions+between+dead-burnt+magnesium+oxide+(MgO)+and+phosphates+(e.g.%2C+KH2PO4)%2C+can%0D%0Abe+a+potential+candidate+for+hosting+Cs%2C+since+it+has+been+reported+that+Cs+can+be+incorporated+in+the+Kstruvite%0D%0Astructures+by+substituting+potassium+(K)+to+form+(K%2CCs)-struvite.+However%2C+the+acid-based+reaction+to%0D%0Aform+MPC+under+ambient+temperature+between+magnesium+oxide+(MgO)+and+phosphates+(e.g.%2C+KH2PO4)+is%0D%0Aviolent+and+exothermic%2C+which+raises+concerns+about+industrial+application+of+MPC+in+real+world.+In+this+work%2C%0D%0Aground-granulated+blast-furnace+slag+(GGBS)+and+pulverised+fuel+ash+were+used+to+replace+MPC+in+order+to%0D%0Areduce+the+heat+released.+The+feasibility+of+MPC%2C+as+well+as+MPC-based+blends%2C+i.e.+GGBS-MPC+or+PFAMPC%0D%0Amatrices%2C+for+immobilising+Cs+was+assessed+by+their+leaching+behaviour+at+the+ages+of+3d%2C+7d+and+28d.%0D%0AIn+addition%2C+two+typical+PC+based+systems+currently+used+in+nuclear+waste+immobilisation%2C+i.e.%2C+pure+PC+and%0D%0APC-GGBS+(1%3A9)+mixes%2C+were+also+produced+and+tested+as+controls.+The+results+indicated+that+all+the+MPC%0D%0Amixes%2C+including+pure+MPC%2C+GGBS-MPC+and+PFA-MPC%2C+demonstrated+superb+capability+for+immobilising+Cs%2C%0D%0Awith+the+immobilisation+rates+achieved+more+than+99.5%25+at+all+curing+age+investigated.+Compared+to+the%0D%0Atraditional+PC+and+PC%2FGGBS+mixes%2C+the+MPC+mixes+nearly+doubled+the+Cs+immobilisation+rate%2C+which+is%0D%0Arather+encouraging.&rft.publisher=The+Institute+of+Materials%2C+Minerals+and+Mining&rft.date=2016-09-05&rft.type=Proceedings+paper&rft.publisher=36th+Cement+and+Concrete+Science+Conference&rft.source=+++++In%3A++Proceedings+of+the+36th+Cement+and+Concrete+Science+Conference.++++The+Institute+of+Materials%2C+Minerals+and+Mining%3A+London%2C+UK.+(2016)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1523325%2F1%2FBai_36CCS_UCL%2520Yun%2520Bai_REF.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1523325%2F&rft.rights=open