CORRELATION BETWEEN RICE HUSK ASH AS SUBSTITUTION MATERIALS THE AMOUNT OF CEMENT AND PROPERTIES OF HIGH STRENGTH FLOWING CONCRETE
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 for vibration to reduce construction cost and reducing construction
time. High strength flowing concrete in this research used rice husk ash as
substitution material the amount of cement. 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 substitution of rice husk ash to the concrete are 0 %,
3%, 6%, 9%, 12% and 15% of the cement content. The test result indicated that
effect of rice husk ash in fresh concrete was increased the workability of the
concrete. Addition of rice husk ash was made fresh concrete enough cohesiveness
without causing segregation. Addition of rice husk ash wasincreased the initial
and final setting time. The cylinder compression strength of rice husk ash
flowing concrete at 7day and 14 days was lower than compression strength of
flowing concrete without rice husk ash at the same days. The optimum strength
of rice husk ash flowing concrete was 44,44 MPa at 56 days age in 12 % presence
of rice husk ash.
KEYWORDS: High strength
flowing concrete, compression strength, rice husk ash, setting time, workability
Penulis: Surya Sebayang
Kode Jurnal: jptsipildd110260
