ENHANCING MECHANICAL PROPERTIES OF NO-FINES CONCRETE: EPOXY MODIFICATION AND CURING CONDITIONS
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Keywords:
No-Fines Concrete, Epoxy Resins, Curing Conditions, Strength PropertiesAbstract
The present study considers the influence of curing techniques on normal weight concrete
(NC), no-fines concrete (NFC) and epoxy modified no-fines concrete (ENFC) with the emphasis on
compressive, splitting tensile and flexural strength properties. For each type in triplicate, specimens were
cured under water, in open atmosphere and under laboratory conditions. Copious tests show that NC was
the most effective type for which water cured samples displayed 4415 psi of compressive strength, 441.32
psi of splitting tensile strength and 160.48 psi of flexural strength. Absence of fine such as sand in the
mixtures of NFC broadly disadvantaged the concrete until the water cured samples reached a compressive
strength of 1413.12 psi, coupled with good tensile and flexural strengths making it a good candidate for
light weight structural applications. Higher levels of NFC were achieved with the addition of resin
especially epoxy whereby treated specimens ENFC samples of water cure showed a compressive strength
of ENFC26365 psi, splitting tensile strength of239.6psi and flexural strength of193 psi which exhibited
both strength and flexibility. The analysis finally recommends optimum curing and material optimization
modifications for the improvement of NFC mechanical properties as though water curing and epoxy
modification dirt cheap concrete replacements for the conventional type.
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References
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