TINJAUAN SIFAT-SIFAT MEKANIK BETON ALIR MUTU TINGGI DENGAN SILIKA FUME SEBAGAI BAHAN TAMBAHAN
ABSTRACT: Flowing concrete
flow under it own weight and maintain homogeneity while filling and passing
around congested reinforcement. Flowing concrete is used to reduce or eliminate
the need formvibration to reduce construction cost and reducing construction
time. High strength flowing concrete in this research used silica fume as
additive material in flowing concrete. The properties investigated are
workability, concrete setting time, and compression strength. Proportion of material
for concrete determined according to ACI 211-4R-1993 and combine with Hashimoto
method. The addition of silica fume to the concrete are 0 %, 3%, 6%, 9%, 12%
and 15% of the cement content. The test result indicated that effect of silica
fume in fresh concrete was reduced the workability of the concrete. Addition of
silica fume was made fresh concrete enough cohesiveness without causing
segregation. Addition of silica fume was increased the initial and final
setting time. The cylinder compression strength of silica fume flowing concrete
at 7day,14 days, and 28 day was higher than compression strength of flowing
concrete without silica fume at the same days. The optimum strength of silica
fume flowing concrete was 51,35 MPa at 56 days age, in 9 % presence of silica
fume.
KEYWORDS: High strength
flowing concrete, compression strength, silica fume, setting time, workability
Penulis: Surya Sebayang
Koda Jurnal: jptsipildd110257
