Effect of different alkali salt additions on concrete durability property

Abstract Friedel’s salt (FS) is a versatile material and has several advantages in constructional and metallurgical sectors. In this paper, FS is formed in situ in concrete. The addition of Al2O3 (5% by weight of cement) was maintained constant and the formation of FS was proceed through the various ranges of NaCl, KCl and CaCl2. Among them, CaCl2 addition was found effective in the large formation of FS in concrete. The influence of FS on the mechanical, permeability and corrosion resistance properties of concrete was studied by electrochemical techniques. X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron micrographs were used to characterize the formation of FS in concrete.

[1]  David S. Kosson,et al.  Effects of progressive carbonation on heavy metal leaching from cement‐bound waste , 2006 .

[2]  Nick R. Buenfeld,et al.  Factors influencing chloride-binding in concrete , 1990 .

[3]  V. Saraswathy,et al.  Evaluation of a composite corrosion inhibiting admixtures and its performance in Portland pozzolana cement , 2004 .

[4]  O. A. Kayyali,et al.  Chloride Binding Capacity in Cement‐Fly‐Ash Pastes , 1992 .

[5]  Jinxia Xu,et al.  Influence of CaCl2 and NaCl from different sources on chloride threshold value for the corrosion of steel reinforcement in concrete , 2011 .

[6]  Jos Brouwers,et al.  Chloride binding related to hydration products : Part I : Ordinary Portland Cement , 2012 .

[7]  G. Renaudin,et al.  Structural transition of Friedel's salt 3CaO·Al2O3·CaCl2·10H2O studied by synchrotron powder diffraction , 2002 .

[8]  Hui Yu,et al.  Threshold chloride level and characteristics of reinforcement corrosion initiation in simulated concrete pore solutions , 2012 .

[9]  P. J. Walden,et al.  THE EFFECT OF CHLORIDE ION SOURCE ON THE FREE CHLORIDE ION PERCENTAGES IN OPC MORTARS , 1990 .

[10]  P. Brown,et al.  PhreeqC modeling of Friedel's salt equilibria at 23±1 °C , 2004 .

[11]  S. Delvasto,et al.  Comparative and semi-quantitative XRD analysis of Friedel’s salt originating from pozzolan and Portland cement , 2011 .

[12]  M. Ben-Yair.  The effect of chlorides on concrete in hot and arid regions , 1974 .

[13]  Marta Castellote,et al.  Chloride threshold dependence of pitting potential of reinforcements , 2002 .

[14]  Jinxia Xu,et al.  Influence of detection methods on chloride threshold value for the corrosion of steel reinforcement , 2009 .

[15]  F. P. Glasser,et al.  Friedel’s salt, Ca2Al(OH)6(Cl,OH)·2H2O: its solid solutions and their role in chloride binding , 1998 .

[16]  O. Kayali,et al.  The role of hydrotalcite in chloride binding and corrosion protection in concretes with ground granulated blast furnace slag , 2012 .

[17]  Kazuo Yamada,et al.  Chloride Binding of Cement Estimated by Binding Isotherms of Hydrates , 2005 .

[18]  G. Glass,et al.  The influence of chloride binding on the chloride induced corrosion risk in reinforced concrete , 2000 .

[19]  Adam Neville,et al.  Chloride attack of reinforced concrete: an overview , 1995 .

[20]  N. S. Rengaswamy,et al.  Fixing of chloride in concrete using admixtures , 2000 .

[21]  Katrien Audenaert,et al.  Chloride binding of cement-based materials subjected to external chloride environment – A review , 2009 .

[22]  E. Vázquez,et al.  Accelerated carbonatation of sewage sludge–cement–sand mortars and its environmental impact , 2001 .

[23]  C. L. Page,et al.  Pore solution composition and chloride binding capacity of silica-fume cement pastes , 1983 .

[24]  Rasheeduzzafar,et al.  Effect of temperature on pore solution composition in plain cements , 1993 .