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Compression Strength of Saline Water-exposed Epoxy System Containing Fly Ash Particles

Polymer Composites Laboratory, Department of Metallurgy, Centre for Advanced Studies, Indian Institute of Science, Bangalore, 560 012, India balkis{at}metalrg.iisc.ernet.in

P. Barpanda

Department of Ceramic Engineering, National Institute of Technology, Rourkela, 769 008, India

S. M. Kulkarni

Department of Mechanical Engineering National Institute of Technology Surathkal, 575 025, India

Epoxy systems with and without different volume fractions of fly ash particulate fillers are made and their absorption due to immersion in saline water maintained at room temperature are established through weight measurements recorded up to 100 h. The 100-h exposed samples are additionally subjected to compression tests to evaluate the strength. The results show that both neat epoxy and fly ash-bearing composites exhibit differing levels of aqueous medium absorption – it being less in ash-free samples. When the ash content in the system is large, the absorption levels are high. The data further revealed that the unexposed samples generally record an increasing strength value with ash content. However, for the exposed cases, a reversal in trend with the ash content is noticed. Attempts to explain these differing trends are made in this work by analyzing the features observed on the surface of compression-failed samples using fractography employing scanning electron microscopy (SEM).

Key Words: epoxy • filler • fly ash • saline water exposure • compression strength • fractography

This version was published on October 1, 2005

Journal of Reinforced Plastics and Composites, Vol. 24, No. 15, 1567-1576 (2005)
DOI: 10.1177/0731684405050390


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