CD Skripsi
Beton Pofa (Palm Oil Fuel Ash) Dengan Bahan Tambah Silica Fume
ABSTRACT
Waste from processed palm oil is increasing over time. Palm Oil Fuel Ash (POFA)
from boilers can be used as a substitute for cement in concrete because it contains
silica and alumina. This study examines the optimum mix of cement replacement by
Palm Oil Fuel Ash (POFA) and silica fume addition to the concrete mixture. The
variables used include the variation of POFA replacement (0-40%), and the use of
silica fume addition (0-15%) with the control concrete is PCC concrete. The
concrete will be tested for its compressive strength and porosity at the age of 3, 7,
and 28 days after curing in plain water. Based on the test result, the control
concrete's compressive strength and porosity were 21,74 MPa and 12,818 MPa.
The highest compressive strength was the concrete mixture without POFA
replacement with 10% silica fume addition, the compressive strength is 25,84 MPa,
and the porosity is 11,57%. The optimum compressive strength of POFA concrete
was the POFA replacement 20% concrete mixture with 10% silica fume addition of
17,32 MPa. Likewise, the optimum porosity of POFA concrete in the 20%
replacement of POFA concrete mix with 10% silica fume is 9,19%. POFA concrete
did not reach the compressive design strength of 20 MPa. However, the use of
POFA is very effective in reducing pores in concrete. It is known that the average
porosity of POFA concrete is smaller than control concrete.
Keyword: Palm Oil Fuel Ash, silica fume, compressive strength, porosity.
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