Int. J. Advanced Structures & Geotechnical Engineering

 

ISSN 2319-5347, ISI Impact Factor: 0.763

VOLUME 03 NO. 02 APRIL 2014:

Title:       An Experimental Study on the Strength of Mortar due to Filler Effect of Pozzolanic Materials
Authors:    M. N. N. Khan, M. Jamil, A. B. M. A. Kaish, M. F. M. Zain, M. R. Karim
Abstract:  The filler effect of pozzzolanic materials is defined as proper arrangement of small particles into the microstructure that fill the voids and contribute towards improvement of compressive strength without any chemical reaction. This effect of pozzolan plays a vital role for the production of high strength mortar. The filler
effect is dominating when pozzolan particles are in chemically inactive form. The individual contribution of physical and chemical effect in concrete and mortar still not determined. Several studies have been found in the published literature on finding the filler effect of pozzolans by replacing cement with chemically inactive materials which size is same as pozzolans. The chemically inactive materials used in previous studies are carbon black, limestone filler and ground river sand, which used bigger range size of replacement percentages (like 5%, 10%, 15% or 10%, 20%, 30%etc). However in this study, lower range size of replacement percentages (like 2.5%, 5%, 7.5% etc) were examined. This is due to probabilities of peak value of compressive strength due to filler effect may lie in between two replacement percentages used in previous studies. In order to determine the filler effect, chemically inactive material (ground river sand) with various particle sizes used as supplementary material of cement to produce mortar specimens. Result shows that compressive strength of ground river sand mortar at smaller replacement percentages is very near to the compressive strength of control mortar. The loss of compressive strength indicates the only filler effect of small size ground sand whereas pozzolanic effect was inactive in the concrete microstructure.

Keywords:  Pozzolanic Materials, Filler Effect, Replacement Percentages, Voids, Compressive Strength
Page No:    106-109

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