Neat epoxy (NE) and epoxy system with different volume fractions of fly ash fillers with their surfaces treated by silane bearing material were made and the responses to exposure by immersion in varying aqueous media, such as plain water (PW), seawater (SW) and seawater containing small amount of dilute hydrochloric acid (SWA) maintained at 80°C, established through weight measurements recorded up to 100 h on the test coupons. Further on, the 100 h exposed samples were subjected to compression tests to evaluate the strength. The results showed that both NE and the silane treated ash bearing composites generally exhibited the highest water absorption in SWA case and the lowest in SW media, with the water absorption level for PW case falling in between. When the ash content in the composite is very large, the water absorption levels tend to be lower for both SW and SWA. The data further showed that unexposed samples recorded less strength compared to the exposed ones. In the case of exposed samples, in all the media employed, as the ash content increases the strength also increases. Further, it was noticed that the samples exposed to SW showed higher strength than the corresponding values noticed with SWA case. Lower strength was found in samples immersed in PW case. Attempts to explain these differing trends are made in this effort by analyzing the features observed on the surface of compression failed samples using fractography technique employing scanning electron microscope (SEM).

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dc.contributor.authorKishore
dc.contributor.authorRavikumar, N.L.
dc.contributor.authorKulkarni, S.M.
dc.date.accessioned2026-02-05T11:00:19Z
dc.date.issuedCompression strength of aqueous media exposed epoxy system containing silane surface bearing fly ash particles
dc.description.abstract2004
dc.identifier.citationJournal of Reinforced Plastics and Composites, 2004, 23, 9, pp. 959-968
dc.identifier.issn7316844
dc.identifier.urihttps://doi.org/10.1177/0731684404033959
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/27943
dc.subjectCompressive strength
dc.subjectFailure (mechanical)
dc.subjectFiber reinforced materials
dc.subjectFillers
dc.subjectFly ash
dc.subjectFractography
dc.subjectScanning electron microscopy
dc.subjectSilanes
dc.subjectWater absorption
dc.subjectWeighing
dc.subjectAqueous media exposure
dc.subjectPlain water (PW)
dc.subjectPollutant materials
dc.subjectSilane treatment
dc.subjectEpoxy resins
dc.titleNeat epoxy (NE) and epoxy system with different volume fractions of fly ash fillers with their surfaces treated by silane bearing material were made and the responses to exposure by immersion in varying aqueous media, such as plain water (PW), seawater (SW) and seawater containing small amount of dilute hydrochloric acid (SWA) maintained at 80°C, established through weight measurements recorded up to 100 h on the test coupons. Further on, the 100 h exposed samples were subjected to compression tests to evaluate the strength. The results showed that both NE and the silane treated ash bearing composites generally exhibited the highest water absorption in SWA case and the lowest in SW media, with the water absorption level for PW case falling in between. When the ash content in the composite is very large, the water absorption levels tend to be lower for both SW and SWA. The data further showed that unexposed samples recorded less strength compared to the exposed ones. In the case of exposed samples, in all the media employed, as the ash content increases the strength also increases. Further, it was noticed that the samples exposed to SW showed higher strength than the corresponding values noticed with SWA case. Lower strength was found in samples immersed in PW case. Attempts to explain these differing trends are made in this effort by analyzing the features observed on the surface of compression failed samples using fractography technique employing scanning electron microscope (SEM).

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