Indian Journal of Engineering & Materials Sciences

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Experimental Study on Carbonation Depths of OPC and PPC Concrete by Conventional and Advanced Methods


Affiliations
1 Department of Civil Engineering, Bharat Heavy Electricals Limited, Barh 803 215, India
2 Department of Civil Engineering, Sitamarhi Institute of Technology, Sitamarhi 843 302, India
3 Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi 221005, India

Analysis of carbonation depths in concrete through conventional phenolphthalein indicator method as well as advanced methodologies such as X-ray diffraction analysis (XRDA) and fourier transform infrared (FTIR) method has been used to evaluate the accurate effect of carbonation on concrete samples. Concrete is carbonated in an acceleration chamber for the experimental process to achieve results in a limited period. Concrete samples have been prepared by using OPC cement and PPC cement at three different water/cement ratios (0.40, 0.45, and 0.50), and retained in a carbonation chamber at fixed parameters. The results of carbonation depths of concrete samples have been obtained from advanced methods as well as conventional phenolphthalein indicator method and analyzed the results. Carbonation depths obtained from advanced methods have been nearly double that of results obtained from the conventional method for OPC and PPC concrete. The carbonation depth of concrete samples is increased with an increase in the W/C ratio. The carbonation depth of PPC concrete samples is higher in comparison to OPC concrete obtained by all mentioned three methods. Hence OPC concrete is proposed to use in place of PPC concrete to reduce the risk of carbonation in reinforced concrete structures in the polluted area.

Keywords

Concrete, Durability, Reinforcement corrosion, Carbonation, Phenolphthalein, X-Ray Diffraction Analysis, Fourier Transform Infrared
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  • Experimental Study on Carbonation Depths of OPC and PPC Concrete by Conventional and Advanced Methods

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Authors

Alok Ranjan
Department of Civil Engineering, Bharat Heavy Electricals Limited, Barh 803 215, India
Shashi Kumar
Department of Civil Engineering, Sitamarhi Institute of Technology, Sitamarhi 843 302, India
Rajesh Kumar
Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi 221005, India
Devendra Mohan
Department of Civil Engineering, Indian Institute of Technology (BHU), Varanasi 221005, India

Abstract


Analysis of carbonation depths in concrete through conventional phenolphthalein indicator method as well as advanced methodologies such as X-ray diffraction analysis (XRDA) and fourier transform infrared (FTIR) method has been used to evaluate the accurate effect of carbonation on concrete samples. Concrete is carbonated in an acceleration chamber for the experimental process to achieve results in a limited period. Concrete samples have been prepared by using OPC cement and PPC cement at three different water/cement ratios (0.40, 0.45, and 0.50), and retained in a carbonation chamber at fixed parameters. The results of carbonation depths of concrete samples have been obtained from advanced methods as well as conventional phenolphthalein indicator method and analyzed the results. Carbonation depths obtained from advanced methods have been nearly double that of results obtained from the conventional method for OPC and PPC concrete. The carbonation depth of concrete samples is increased with an increase in the W/C ratio. The carbonation depth of PPC concrete samples is higher in comparison to OPC concrete obtained by all mentioned three methods. Hence OPC concrete is proposed to use in place of PPC concrete to reduce the risk of carbonation in reinforced concrete structures in the polluted area.

Keywords


Concrete, Durability, Reinforcement corrosion, Carbonation, Phenolphthalein, X-Ray Diffraction Analysis, Fourier Transform Infrared