The influence of heavy metals on the polymorphs of dicalcium silicate in the belite-rich clinkers produced from electroplating sludge

Chen, Ying-Liang; Shih, Pai Haung; Chiang, Li Choung; Yi, Chen; Lu, Hsing Cheng; Chang, Juu En

doi:10.1016/j.jhazmat.2009.04.076

Cited by 58 publications

(31 citation statements)

References 27 publications

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“…First, C 2 S-C 3 P solid solutions such as Ca 2 SiO 4 ·0.05Ca 3 (PO 4 ) 2 and Ca 15 (PO 4 ) 2 (SiO 4 ) 6 were detected in the XRD pattern of RMCr. This phenomenon was similar to what was observed by Marie-Noe¨lle de Noirfontaine [38], who reported that adding phosphorus could cause partial decomposition of C 3 S into C 2 S and CaO phases, and that phosphorus was present in solid solution phases of C 2 S-C 3 P. Second, in the clinker samples of RMNi and RMCu, phosphorus was also present in such heavy metal-containing compounds as K 2 NiP 2 O 7 , K 2 Cu(PO 3 ) 4 , and Cu 4 O(PO 4 ) 2 . This indicates that parts of Cu and Ni were not incorporated in the calcium silicate phases but that they reacted with P and alkali metals.…”

Section: Impact Analysis Of Municipal Sewage Sludge On Incorporating supporting

confidence: 56%

“…These changes were mainly caused by the trace elements, phosphorus in particular. Phosphorus from MSS caused the changes of C 3 S polymorphism, and also promoted the generation of the new phases: K 2 NiP 2 O 7 , K 2 Cu(PO 3 ) 4 , and Cu 4 O(PO 4 ) 2 in cement clinker. These changes indicate a reduction in the solubility of heavy metals in cement clinker, and reductions in the fixation ratios of heavy metals.…”

Section: Resultsmentioning

confidence: 99%

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Role of Municipal Sewage Sludge in Incorporating Cr, Ni, Cu, and Zn into Cement Clinker

Liu

Cao

et al. 2018

Pol. J. Environ. Stud.

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Section: Impact Analysis Of Municipal Sewage Sludge On Incorporating supporting

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Role of Municipal Sewage Sludge in Incorporating Cr, Ni, Cu, and Zn into Cement Clinker

Liu

Cao

et al. 2018

Pol. J. Environ. Stud.

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“…In short, the cement industry is responsible for 5-7% of all anthropogenic emissions (10,11) world wide. In order to attain sustainable development for manufacture of PC, there has been a revival of intensive interests in exploring high belite cement with low lime saturation factor (LSF), which leads to an increase in belite amount and a decrease in alite phase content in the clinker (12)(13)(14)(15)(16).…”

Section: Introductionmentioning

confidence: 99%

Formation and early hydration characteristics of C2.75B1.25A3$ in binary system of C2.75B1.25A3$-C2S

et al. 2016

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C 2.75 B 1.25 A 3 $ (2.75CaO•1.25BaO• 3Al 2 O 3 • SO 3 ) is one of the important minerals and it governdirectly the early-strength of belite-barium calcium sulphoaluminate cement. In this paper a binary system C 2.75 B 1.25 A 3 $-C 2 S is selected to investigate the formation of C 2.75 B 1.25 A 3 $. In the range of 1100 °C-1200 °C, the earlier formed C 2 S hinders the formation of C 2.75 B 1.25 A 3 $. On the contrary, when the temperature is in the range of 1200 °C-1350 °C, the initially formed C 2 S could provide a surface for the nucleation of C 2.75 B 1.25 A 3 $ and cut down the potential barrier (ΔG k* ) for the heterogeneous nucleation of C 2.75 B 1.25 A 3 $, which contributes to its formation. Moreover, at 1350 °C, the large amount of previously formed C 2 S benefits the extent of formation of C 2.75 B 1.25 A 3 $. The possible reason was that it could prevent sulfur evaporation. In early hydration age, AFm and AFt originating from C 2.75 B 1.25 A 3 $ hydration are found within 2 h and 12 h under 95% RH at 1 °C, respectively, whereas C 2 S is unhydrated at this moment. ) es una de las principales fases, y regula directamente la resistencia inicial del cemento. En este trabajo, se ha seleccionado el sistema binario C 2.75 B 1.25 A 3 $-C 2 S para investigar la formación de C 2.75 B 1.25 A 3 $. En el rango de 1100 °C-1200 °C, el C 2 S formado anteriormente impide la formación de C 2.75 B 1.25 A 3 $, mientras que cuando la temperatura está entre 1200 °C-1350 °C, el C 2 S proporcionaría una superficie de nucleación de C 2.75 B 1.25 A 3 $ reduciendo la barrera de potencial (ΔG k* ) para la nucleación heterogénea de C 2.75 B 1.25 A 3 $, lo que contribuye a su formación. Además, a 1350 °C, la gran cantidad de C 2 S for mado beneficia la formación de C 2.75 B 1.25 A 3 $, ya que podía prevenir la evaporación del azufre. En las primeras etapas de la hidratación (entre 2 y 12h y 95% HR a 1 ºC) se pueden encontrar AFM y AFt procedentes de la hidratación de C 2.75 B 1.25 A 3 $, mientras que el C 2 S permanece sin hidratar. KEYWORDS:

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“…The most common formulation of belite-sulphoaluminate cements are C 2 S, C 4 A 3 Š and C 4 AF [10][11][12][13]. It contains more than 50 wt.…”

Section: Introductionmentioning

confidence: 99%

HYDRATING CHARACTERISTICS OF MODIFIED PORTLAND WITH Ba-BEARING SULPHOALUMINATE MINERALS

Wang¹,

Gong²,

Jibao³

et al. 2016

Ceramics - Silikaty

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The influence of heavy metals on the polymorphs of dicalcium silicate in the belite-rich clinkers produced from electroplating sludge

Cited by 58 publications

References 27 publications

Role of Municipal Sewage Sludge in Incorporating Cr, Ni, Cu, and Zn into Cement Clinker

Role of Municipal Sewage Sludge in Incorporating Cr, Ni, Cu, and Zn into Cement Clinker

Formation and early hydration characteristics of C<sub>2.75</sub>B<sub>1.25</sub>A<sub>3</sub>$ in binary system of C<sub>2.75</sub>B<sub>1.25</sub>A<sub>3</sub>$-C<sub>2</sub>S

HYDRATING CHARACTERISTICS OF MODIFIED PORTLAND WITH Ba-BEARING SULPHOALUMINATE MINERALS

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