Civil and Environmental Research www.iiste.org ISSN 2224-5790 (Paper) ISSN 2225-0514 (Online) Vol.3, No.6, 2013 - Selected from International Conference on Recent Trends in Applied Sciences with Engineering Applications 24 Comparison between Portland Pozzolana Cement & Processed Fly Ash blended Ordinary Portland Cement Rajendra Rajdev* 1 ,Shalini Yadav 1a and Rakesh Sakale 2b 1 Department of Civil Engineering, Patel Institute of Technology, Bhopal, India 2 Department of Civil Engineering, Patel Institute of Engineering & Science, Bhopal, India *Corresponding author, P.G.Student,E-mail: [email protected] a Ph.D., E-mail: [email protected] b Professor, E-mail: [email protected] Abstract This paper presents a comparison between two different procedures for the use of Fly ash (FA) in cement industry. The first which is very often used is by adding FA to clinker as in the manufacture of Portland Pozzolana Cement (PPC).The second which is recent trend is to process FA & by blending it with Ordinary Portland cement (OPC).Strength parameters are compared of both the types of cement. For the same target strength of the cubes OPC blended with Processed FA (PFA) proved to be more economical than PPC. Keywords: Fly Ash ,Blending, Ordinary Portland Cement, Portland pozzolana Cement, Processed Fly Ash. 1.INTRODUCTION To make economical use of the resources of our planet we should maintain a sustainable environment and preserve our future. There is strong need to explore the possibilities to reduce the use of material, to reuse the waste and to reduce the carbon dioxide (CO 2 ). Our cement industry produces about 251.2 million tonnes cement per year. The type of fuel used in cement manufacture directly impact on CO 2 emission. Decarbonisation of raw material at high temperature being the major source of CO 2 emission. Therefore approximately 5% of manmade emission originate in the cement industry. 10 To meet the power requirement of the nation, coal based thermal power plants have been a major source of power generation in India where 75% of the total power obtained is from coal based thermal plants. This result in generation of huge amount of bye product such as fly ash (FA) which is not being used in any significant manner. Most of the FA is dumped in lagoons, land fill sites and abandoned quarries. 3 Test results indicated that the blended cement paste with classified FA produced paste with higher compressive strength than that with original FA. 4 Though the original FA is largely used by the cement industry in the manufacture of Portland pozzolana cement(PPC) but still there lies a large scope of use of FA by partially replacing cement in concrete and mortars. This is only possible when FA of higher fineness confirming to IS 3812 :2003 is made available in open market. 2.OBJECTIVE The specific purpose of this paper is to compare the strength parameters of PPC & PFA blended OPC & to arrive at conclusion which type of cement is more beneficial for sustainability of environment & construction industry. 3.LITERATURE REVIEW Numerous studies e.g., Bharat kumar et al (2000), Saraswati et al (2002), Chindaprasirt et al (2004, 2005), Manikandan et al (2007), Singh (2009), Chauhan (2011), Tiwari et al (2011), has quantify the effect of economical use of resources on environment. These studies clearly indicate that there is strong need to explore the possibilities to reduce the use of material ,to reuse the waste and to reduce the carbon dioxide (CO 2 ). This can be achieved by the use of processed FA Bharat kumar et al (2000), studied mix proportioning of high performance concrete. The paper concluded that mix proportioning method uses FA as cement replacing material in obtaining economical HPC mix. Saraswati et al (2002), studied Influence of activated fly ash on corrosion resistance and strength of concrete. In this study Concrete specimens prepared with 10%, 20%, 30% and 40% of activated fly ash replacement levels were evaluated for their compressive strength at at 7, 14, 28 and 90days and the results were compared with ordinary Portland cement concrete (without fly ash). All the studies confirmed that up to a critical level of 20–30%replacement; activated fly ash cement improved both the corrosion-resistance and strength of concrete. Chemical activation of fly ash yielded better results than the other methods of activation investigated in this study. Alves et al (2003), compares mix proportioning methods for high-strength concrete by studying four proportioning methods. one being for conventional concrete and three specifically for high strength. The results
Comparison between Portland Pozzolana Cement & Processed Fly Ash blended Ordinary Portland Cement
May 20, 2023
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