Phosphorus speciation in dicalcium silicate phases: Application to the basic oxygen furnace (BOF) slag

被引：20

作者：

Duee, Cedric ^{[1
]}

Bourgel, Christine ^{[1
]}

Veron, Emmanuel ^{[1
]}

Allix, Mathieu ^{[1
]}

Fayon, Franck ^{[1
]}

Bodenan, F. ^{[2
]}

Poirier, Jacques ^{[1
]}

机构：

[1] Univ Orleans, CNRS, CEMHTI UPR3079, F-45071 Orleans, France

[2] Bur Rech Geol & Minieres, F-45060 Orleans 2, France

来源：

CEMENT AND CONCRETE RESEARCH | 2015年 / 73卷

关键词：

Structural characterization; Cement; Ca2SiO4; Phosphorus; Waste management; CHEMICAL-SHIFT ANISOTROPIES; CALCIUM SILICATES; CRYSTAL-STRUCTURE; NMR; CEMENT; POLYMORPHS; HYDRATION;

D O I：

10.1016/j.cemconres.2015.03.012

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The recycling of basic oxygen furnace slag in the steelmaking process is currently limited by its phosphorus content. Phosphorus is known to induce remarkable phase segregation in the slag microstructure and is only present in phases belonging to the C2S-C3P solid solution, the iron-containing phases being left free of phosphorus. The mechanism of phosphorus insertion into calcium silicate structures was studied by a combination of TEM, XRD and Si-29 and P-31 solid-state NMR. Upon P2O5 addition, [PO4](3-) units are incorporated into the dicalcium silicate structure by substituting [SiO4](4-) groups, charge balance being maintained by creation of calcium vacancies. This substitution leads to a stabilization of the beta- and alpha-Ca2SiO4 phases at room temperature and results in the formation of more polymerized calcium silicate secondary phases. The obtained P-substituted alpha-Ca2SiO4 compounds belong to the Ca2-x/2Si1-xPxO4 solid solution and exhibit lattice parameters similar to those of the calcium phosphosilicate Ca-15(PO4)(2)(SiO4)(6) Phase. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：207 / 214

页数：8

共 37 条

[1] The effect of cement composition and pH of environment on sulfate resistance of portland cements and blended cements [J].

Cao, HT ;

Bucea, L ;

Ray, A ;

Yozghatlian, S .

CEMENT & CONCRETE COMPOSITES, 1997, 19 (02) :161-171

[2] Environmental impacts of steel slag reused in road construction: A crystallographic and molecular (XANES) approach [J].

Chaurand, Perrine ;

Rose, Jerome ;

Briois, Valerie ;

Olivi, Luca ;

Hazemann, Jean-Louis ;

Proux, Olivier ;

Domas, Jeremie ;

Bottero, Jean-Yves .

JOURNAL OF HAZARDOUS MATERIALS, 2007, 139 (03) :537-542

[3] Effect of Phosphorus Impurity on Tricalcium Silicate T1: From Synthesis to Structural Characterization [J].

de Noirfontaine, Marie-Noelle ;

Tusseau-Nenez, Sandrine ;

Signes-Frehel, Marcel ;

Gasecki, Gilles ;

Girod-Labianca, Caroline .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2009, 92 (10) :2337-2344

[4] Stable Ca3SiO5 solid solution containing manganese and phosphorus [J].

Diouri, A ;

Boukhari, A ;

Aride, J ;

Puertas, F ;

Vazquez, T .

CEMENT AND CONCRETE RESEARCH, 1997, 27 (08) :1203-1212

[5] SUBSOLIDUS RELATIONS IN SYSTEM 2CAO.SIO2-3CAO.P2O5 [J].

FIX, W ;

HEYMANN, H ;

HEINKE, R .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1969, 52 (06) :346-&

[6] Formation reaction of phosphate compound in multi phase flux at 1573 K [J].

Fukagai, Shinya ;

Hamano, Tasuku ;

Tsukihashi, Furnitaka .

ISIJ INTERNATIONAL, 2007, 47 (01) :187-189

[7]

Fukuda K, 1998, J AM CERAM SOC, V81, P2729, DOI 10.1111/j.1151-2916.1998.tb02686.x

[8] Structural change in phosphorus-bearing dicalcium silicates [J].

Fukuda, K ;

Maki, I ;

Ito, S ;

Miyake, T .

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 1997, 105 (02) :117-121

[9] Hydration of αL′- and β-dicalcium silicates with identical concentration of phosphorus oxide [J].

Fukuda, K ;

Taguchi, H .

CEMENT AND CONCRETE RESEARCH, 1999, 29 (04) :503-506

[10] Basic oxygen furnace (BOF) slag cooling: Laboratory characteristics and prediction calculations [J].

Gautier, Mathieu ;

Poirier, Jacques ;

Bodenan, Francoise ;

Franceschini, Gilles ;

Veron, Emmanuel .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2013, 123 :94-101

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