Author(s): Dr. R. G. D\'Souza
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 6 - Issue. 08 , August - 2017
Coal bottom ash is a coarse granular and incombustible byproduct from coal burning furnaces. The appearance and particle size distribution of coal bottom ash is similar to that of river sand and makes it attractive to be used as fine aggregate in the production of concrete. The other advantage of using bottom-ash is that it can be dust free, the sizes of bottom-ash can be controlled easily so that it meets the required grading for the given construction. Bottom ash also exhibits a relatively high permeability and grain size distribution that allows the design engineer to use it in direct contact with impervious material. Bottom ash is used as concrete aggregate or for several other civil engineering applications where sand, gravel and crushed stone are used. In the present work M20, M25 and M30 grade of concrete is considered for the experimental investigation. Fine aggregate is fully replaced with 100% percentage of bottom ash. Comparative result of workability and compressive strength of conventional concrete cube and bottom ash added concrete cube are reported. From the results it is concluded that bottom-ash can be used as a replacement for fine aggregate. The results proved that the replacement of 100% of fine aggregate by bottom-ash achieved higher compressive strength. Thus the environmental effects due to illegal extraction of sand and cost of conventional fine aggregate can be significantly reduced.
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