Utilization of Flue Gas Conditioned Fly Ashes in Cement and Construction Industries

Autori

  • Shanthakumar S
  • Devendra Narain Singh
  • Ravindra C Phadke

Parole chiave:

Suspended particulate matter, Flue gas conditioning, Fly ash characterization, Utilization

Abstract

Fly ash is a waste generated from coal based boilers and has been used in various civil engineering applications. The pozzolanic activity of the fly ash plays a major role in its utilization. The ageing of the electrostatic precipitators (ESPs), variation in coal and ash properties results in higher suspended particulate matter (SPM) emissions. Globally the SPM limits are being reduced, flue gas conditioning (FGC), i.e. dosing of ammonia and sulphur trioxide to the flue gas alters the fly ash properties and increases the collection efficiency of ESPs. There is a concern that due to chemicals dosed in the flue gases, there could be an adverse effect on fly ash and its utilization. This paper presents the investigations on pozzolanic activity (as per ASTM specification) of the conditioned fly ash samples collected from the coal based thermal power stations in India, to conform its suitability for utilization. The pozzolanic activity and strength activity index of ammonia dosed fly ash samples were compared with undosed fly ash samples and found no change in the pozzolanic characteristics.  Hence, the conditioned fly ash is suitable for its utilization in cement and other civil engineering applications.Keywords: Suspended particulate matter, Flue gas conditioning, Fly ash characterization, Utilization

Dowloads

Pubblicato

2011-08-17

Fascicolo

V. 1 N. 1 (2011)

Sezione

Review Articles

Licenza

Declaration and Copyright Transfer Form

(to be completed by authors)

 

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

·         I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.

·         I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).

·         I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.

·          I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. _______________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.