PENGARUH KADAR ABU TERBANG SEBAGAI PENGGANTI SEJUMLAH SEMEN PADA BETON ALIR MUTU TINGGI
ABSTRACT: Flowing concrete
flow under it own weight and maintain homogeneity while filling and
passingaround congested reinforcement. Flowing concrete is used to reduce or
eliminate the need forvibration to reduce construction cost and reducing
construction time. High strength flowingconcrete in this research used fly ash
obtained from PLTU Suralaya Banten as substitutionmaterial the amount of
cement. The properties investigated are workability, concrete setting time,unit
weight, and compression strength. Proportion of material for concrete
determined accordingto ACI 211-4R-1993 and combine with Hashimoto method. The
substitution of fly ash to theconcrete are 0 %, 3%, 6%, 9%, 12% and 15% of the
cement content. The test result indicated thateffect of fly ash in fresh
concrete was increased the workability of the concrete. Addition of fly ashwas
made fresh concrete enough cohesiveness without causing segregation. Addition
of fly ashwas increased the initial and final setting time. The cylinder
compression strength of fly ashflowing concrete at 7days, 14 days and 28 days
was lower than compression strength of flowingconcrete without fly as at the
same days. The optimum strength of fly ash flowing concrete was 48,607 MPa at
56 days age in 9 % presence of fly ash.
Penulis: Surya Sebayang
Kode Jurnal: jptsipildd100168
