Hydration characteristics and immobilization of Cr (VI) in slag cement-CKD pastes under hydrothermal treatment

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• 作者：M. R. Shatat ; Gomaa A. M. Ali ; M. A. Tantawy
• 关键词：hydrothermal ; immobilization ; slag cement ; CKD pastes
• 刊名：Journal of Wuhan University of Technology--Materials Science Edition
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：30
• 期：5
• 页码：1013-1019
• 全文大小：865 KB
• 参考文献：[1]Li Y, Kwan A K H. Ternary Blending of Cement with Fly Ash Microsphere and Condensed Silica Fume to Improve the Performance of Mortar[J]. Cem. Concr. Compos., 2014, 49: 26-5CrossRef
  [2]Cordeiro G C, Filho R D T, Tavares L M, et al. Pozzolanic Activity and Filler Effect of Sugar Cane Bagasse Ash in Portland Cement and Lime Mortars[J]. Cem. Concr. Compos., 2008, 30: 410-18CrossRef
  [3]Shatat M R. Hydration Behavior and Mechanical Properties of Blended Cement Containing Various Amounts of Rice Husk Ash in Presence of Metakaolin[J]. Arabian J. Chem., 2013, 12: 006
  [4]Pacewska B, Wilinska I. Hydration of Cement Composites Containing Large Amount of Waste Materials[J]. Procedia Eng., 2013, 57: 53-2CrossRef
  [5]Jing Z, Jin F, Hashida T,et al. Hydrothermal Solidification of Blast Furnace Slag by Formation of Tobermorite[J]. J. Mater. Sci., 2007, 42: 8236-241CrossRef
  [6]Ahmari S, Zhang L. Utilization of Cement Kiln Dust (CKD) to Enhance Mine Tailings-based Geopolymer Bricks[J]. Constr. Build. Mater., 2013, 40: 1002-011CrossRef
  [7]Safiuddin M, Jumaat M Z, Salam M A, et al. Utilization of Industrial Solid Wastes in the Feld of Building Materials Technology[J]. Int. J. Phys. Sci., 2010, 5: 1952-963
  [8]Al-Harthy A S, Taha R, Al-Maamary F. Effect of Cement Kiln Dust (CKD) on Mortar and Concrete Mixtures[J]. Constr. Build. Mater., 2003, 17: 353-60CrossRef
  [9]Astrup T, Mosbaek H, Christensen T H. Assessment of Long-term Leaching from Waste Incineration Air-pollution-control Residues[J]. Waste Manage, 2006, 26: 803-14CrossRef
  [10]Watanabe K, Yokozeki K, Ashizawa R, et al. High Durability Cementitious Material with Mineral Admixtures and Carbonation Curing[J]. Waste Manage, 2006, 26: 752-57CrossRef
  [11]Giergiczny Z, Krol A. Immobilization of Heavy Metals (Pb, Cu, Cr, Zn, Cd, Mn) in the Mineral Additions Containing Concrete Composites[J]. J. Hazard Mater., 2008, 160: 247-5CrossRef
  [12]Tantawy M A, El-Roudi A M, Salem A A. Immobilization of Cr(VI) in Bagasse Ash Blended Cement Pastes[J]. Constr. Build Mater., 2012, 30: 218-23CrossRef
  [13]Crannell B S, Eighmy T T, Krzanowski J E, et al. Heavy Metal Stabilisation in Municipal Solid Waste Combustion Bottom Ash Using Soluble Phosphate[J]. Waste Manage, 2000, 20: 135-48CrossRef
  [14]Omotoso O E, Ivey D G, Mikula R. Hexavalent Chromium in Tricalcium Silicate[J]. J. Mater. Sci., 1998, 30: 507-13CrossRef
  [15]Wang S, Vipulanandan C. Solidification-stabilization of Cr (VI) with Cement Leachability and XRD Analyses[J]. Cem. Concr. Res., 2000, 30: 385-89CrossRef
  [16]Nazari A, Riahi S. The Effects of Cr2O3 Nanoparticles on Strength Assessments and Water Permeability of Concrete in Different Curing Media[J]. Mater. Sci. Eng. A, 2011, 528: 1173-182CrossRef
  [17]Zhou Q, Milestone N B, Hayes M. An Alternative to Portland Cement for Waste Encapsulation-the Calcium Sulfoaluminate Cement System[J]. J. Hazard Mater., 2006, 136: 120-29CrossRef
  [18]Weeks C, Hand R J, Sharp J H. Retardation of Cement Hydration Caused by Heavy Metals Present in ISF Slag Used as Aggregate[J]. Cem. Concr. Compos., 2008, 30: 970-78CrossRef
  [19]Hills C D, Pollard S J T. The Influence of Interferences Effect on the Mechanical, Microstructural and Fixation Characteristics of Cement Solidified Hazardous Waste Forms[J]. J. Hazard Mater., 1997, 52: 171-91CrossRef
  [20]Jupe A C, Wilkinson A P, Luke K, et al. Class H Cement Hydration at 180 °C and High Pressure in the Presence of Added Silica[J]. Cem. Concr. Res., 2008, 38: 660-66CrossRef
  [21]Palou M T, Bágel-Lu, ? ivica V, et al. Influence of Hydrothermal Curing Regimes on the Hydration of Fiber-reinforced Cement Composites[J]. J. Therm. Anal. Calorim., 2013, 113: 219-29CrossRef
  [22]Yazici H. The Effect of Curing Conditions on Compressive Strength of Ultra High Strength Concrete with High Volume Mineral Admixtures[J]. Build. Environ., 2007, 42: 2083-089CrossRef
  [23]Shatat M R. Effect of Hydrothermal Curing on the Hydration Characteristics of Artificial Pozzolanic Cement Pastes Placed in Closed System[J]. Appl. Clay Sci., 2014(04): 032
  [24]Shatat M R, Ali G A M, Gouda G A, et al. Rice Husk Ash for Enhancing Salts Attack Resistance of Blended Cement Containing Metakoalin[J]. Can. Chem. Trans., 2014, 2(3): 274-84CrossRef
  [25]Wongkeo W, Thongsanitgarn P, Chindaprasirt P, et al. Thermogravimetry of Ternary Cement Blends[J]. J. Therm. Anal. Calorim., 2013, 113: 1079-090CrossRef
  [26]Hartmann A, Buhl J C. The Influence of Sucrose on the Crystallization Behaviour in the System CaO–SiO2–C12H22O11–H2O under Hydrothermal Conditions[J]. Mater. Res. Bull., 2010, 45: 396-02CrossRef
  [27]Zhang M-H, Gj?rv O E. Effect of Silica Fume on Cement Hydration in Low Porosity Cement Pastes[J]. Cem. Concr. Res., 1991, 21: 800-08CrossRef
  [28]Ortega E A, Cheeseman C, Knight J. et al. Properties of Alkali-activated Clinoptilolite[J]. Cem. Concr. Res., 2000, 30: 1641-646CrossRef
• 作者单位：M. R. Shatat (1)
  Gomaa A. M. Ali (1) (2)
  M. A. Tantawy (3)
  
  1. Chemistry Department, Faculty of Science, Al-Azhar University, Assiut, 71525, Egypt
  2. Faculty of Industrial Science and Technology, University Malaysia Pahang (UMP), 26300, Kuantan, Pahang, Malaysia
  3. Chemistry Department, Faculty of Science, Minia University, Minia, Egypt
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Chinese Library of Science
  
• 出版者：Wuhan University, co-published with Springer
• ISSN：1993-0437

文摘

The effect of hydrothermal curing regimes on the hydration characteristics of slag cement containing different ratios of cement kiln dust has been studied. The samples for this study were combination of slag cement and cement kiln dust (5%-25%) without and with immobilization of 5% Cr (VI) by mass. Pastes were hydrothermally treated at 180 °C for different periods (2-24 h) in well closed stainless steel capsule. The hydration characteristics of these pastes were studied by measuring the compressive strength, bulk density, total porosity and combined water content. The findings were further supported by XRD and SEM analysis. The results indicated that the hydration characteristics of slag cement paste containing cement kiln dust 10% by mass were enhanced, especially at later ages (24 h) of hydration. That is due to the hydrothermal curing regimes of immobilized pastes accelerating hydration reactions and precipitation of CaCrO₄, indicating that Cr (VI) can be solidified in the cement paste. This precipitation leads to pore formation in hydrated slag cement pastes. Keywords hydrothermal immobilization slag cement CKD pastes