Tuesday, 10 January 2017

EXPERIMENTAL STUDY ON FIBER REINFORCED SELF-COMPACTING GEOPOLYMER CONCRETE

Geopolymer technology is one of the radical technologies. The main problem of global warming is
CO 2 emission, during the cement production. This problem can be minimized by replacing the cement with fly
ash. When the cement is used as a binder for the construction, it requires more an amount of water for mixing,
curing and the period of curing is also very long. Ferrocement construction is a type of thin reinforced concrete
laminate commonly constructed with hydraulic cement mortar. In thin densely reinforced elements, it is difficult
to apply proper compaction. In ferrocement and densely reinforced thin elements,the failures usually occurs on
compression by crushing mortar at ultimate stage and leads to reduce the tensile and flexural strength of the
element. To overcome the above problems, fiber is used in self-compacting geopolymer mortar to increase the
tensile and flexural strength of the mortar. This study was carried out to evaluate the mix proportions,self-
compacting and strength properties of geopolymer mortar for various mix proportions with different fiber.
Mortar cubes of size 70.6x70.6x70.6 mm were casted and cured at 70 ° C for 24 hours in the oven. The
workability of fresh mortar was determined using slump flow, V-funnel, U-Box, J-Ring, and V-funnel
at T5 minutes as per EFNARC guidelines. The results show better performance in tensile strength and also
flexural strength when fiber is introduced.
Keywords: Fiber, Flyash, Self-Compacting Geopolymer Mortar, Sodium Hydroxide, Sodium
Silicate.

1 comment:

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