CD Skripsi
Karakteristik Mortar Self Healing Menggunakan Serat Daun Nanas Dan Silica Fume Dengan Metode Rendaman Wet-Dry
ABSTRACT
Cracks during the service period can cause a decrease in the durability of the
mortar. One innovative solution for handling cracks in mortar is self healing, which
is the ability of mortar to heal its cracks by utilizing certain materials such as
mineral additives and pozzolan. This study aims to examine the effect of adding
pineapple leaf fibers and silica fume as cement substitutes on the self healing ability
of mortar using the wet-dry immersion method. The mortar mixture consists of
PCC, PALF0SF10, PALF0.3SF10, and PALF0.6SF10. The tests conducted include
flow value, setting time, compressive strength, Strength Activity Index (SAI),
Ultrasonic Pulse Velocity (UPV), porosity, weight change, and visual observation
of the mortar. After being cured for 28 days in water, testing was conducted at 0
days for the uncracked test specimens. The test specimens were then pre-cracked
with a controlled crack width of 0.1-0.3 mm. The treatment was continued for 7, 28,
and 56 days using the wet-dry immersion method, followed by testing at each
immersion age. The test results showed that the addition of pineapple leaf fibers
and silica fume caused a decrease in flow value and setting time. Meanwhile, there
was an increase in compressive strength, SAI, UPV, and changes in weight, as well
as a decrease in porosity, with the highest values observed in the PALF0.3SF10
mixture. Visual observation testing of the mortar showed an increase in crack width
closure with values of 85.27%, 100%, 100%, and 100% for the PCC, PALF0SF10,
PALF0.3SF10, and PALF0.6SF10 mixtures at 56 days. This indicates the
occurrence of pozzolanic reactions that strengthen the mortar structure. The
addition of pineapple leaf fiber and silica fume was able to improve the self healing
ability of mortar compared to control mortar.
Keywords: self healing mortar, pineapple leaf fibers, silica fume, wet-dry
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