Mechanical property and structural evolution of alkali-activated slag-phosphate mine tailings mortars - Details

author：

Wu, Jie (Wu, Jie.) ^[1] | Li, Jing (Li, Jing.) ^[2] | Rao, Feng (Rao, Feng.) ^[3] (Scholars：饶峰) | Yin, Wanzhong (Yin, Wanzhong.) ^[4]

Indexed by：

EI Scopus SCIE

Abstract：

The　present　work　studies　consolidation　of　phosphate　mine　tailings　through　alkaline　activation　process　with　the　addition　of　slag　for　adjusting　the　gel　structure.　As　increasing　slag　contents　in　the　raw　materials,　more　(Na,K)(2)O-CaO-Al2O3-SiO2-H2O　(C-A-S-H)　and　(Na,K)(2)-O-Al2O3-SiO2-H2O　(N-A-S-H)　gels　were　formed　in　the　mine　tailings-based　mortars.　Compressive　strength　of　the　mortars　increased　as　increasing　the　slag　contents　from　0　to　40%,　and　then　it　kept　a　plateau.　Evolution　in　microstructure　of　these　mortars　were　characterized　through　scanning　electron　microscopy　(SEM),　X-ray　diffraction　(XRD)　and　nuclear　magnetic　resonance　(NMR)　measurements.　The　study　provides　fundamentals　for　the　co-disposal　of　phosphate　mine　tailings　with　blast　furnace　slag　through　alkaline　activation　process.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.

Keyword：

Alkali-activated mortar Compressive strength NMR spectra Phosphate tailings

Community：

[ 1 ] [Wu, Jie]Fuzhou Univ, Sch Zijin Min, Fuzhou 350108, Fujian, Peoples R China
[ 2 ] [Li, Jing]Fuzhou Univ, Sch Zijin Min, Fuzhou 350108, Fujian, Peoples R China
[ 3 ] [Rao, Feng]Fuzhou Univ, Sch Zijin Min, Fuzhou 350108, Fujian, Peoples R China
[ 4 ] [Yin, Wanzhong]Fuzhou Univ, Sch Zijin Min, Fuzhou 350108, Fujian, Peoples R China
[ 5 ] [Wu, Jie]Fuzhou Univ, Zijin Min Grp, Joint Res Ctr Comprehens Utilizat Mineral Resourc, Fuzhou 350108, Fujian, Peoples R China
[ 6 ] [Li, Jing]Fuzhou Univ, Zijin Min Grp, Joint Res Ctr Comprehens Utilizat Mineral Resourc, Fuzhou 350108, Fujian, Peoples R China
[ 7 ] [Rao, Feng]Fuzhou Univ, Zijin Min Grp, Joint Res Ctr Comprehens Utilizat Mineral Resourc, Fuzhou 350108, Fujian, Peoples R China
[ 8 ] [Yin, Wanzhong]Fuzhou Univ, Zijin Min Grp, Joint Res Ctr Comprehens Utilizat Mineral Resourc, Fuzhou 350108, Fujian, Peoples R China
[ 9 ] [Rao, Feng]Univ Michoacana, Conacyt Inst Invest Met & Mat, Morelia 58030, Michoacan, Mexico

Reprint 's Address：

饶峰印万忠
[Rao, Feng]Fuzhou Univ, Sch Zijin Min, Fuzhou 350108, Fujian, Peoples R China;;[Yin, Wanzhong]Fuzhou Univ, Zijin Min Grp, Joint Res Ctr Comprehens Utilizat Mineral Resourc, Fuzhou 350108, Fujian, Peoples R China

Email：

fengrao@fzu.edu.cn |
yinwanzhong@mail.neu.edu.cn

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