Prihandini, Rahmalia Eka (2015) Pemanfaatan bottom ASH dan sugar cane bagasse ASH (SCBA) untuk pembuatan paving geopolimer. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
PT. Kasmaji Inti Utama (PT. KIU) adalah sebuah pabrik
kimia yang memproduksi sodium silikat, menggunakan batu bara
untuk bahan bakar sehingga menghasilkan bottom ash sebagai
limbahnya. Bottom ash (abu dasar) merupakan sisa hasil proses
pembakaran batu bara yang mempunyai ukuran partikel lebih
besar dan berat daripada fly ash. Dalam penelitian ini, bottom
ash dimanfaatkan sebagai bahan dasar pembuatan paving
geopolimer dengan beberapa penambahan variasi dari SCBA
(abu ampas tebu).
Perbandingan komposisi yang digunakan antara lain pasta
(bottom ash dan larutan alkali) dengan agregat adalah 30:70,
bottom ash dengan larutan alkali adalah 70:30, larutan alkali
dari Na2SiO3 dan NaOH 14M adalah 2,5:1, serta penambahan
air sebesar 5/30 bagian dari larutan alkali yang dipakai. Serta
dilakukan perbandingan antara pembuatan secara manual dan
masinal.
Didapatkan hasil bahwa paving manual lebih baik dari
paving masinal. Diketahui bottom ash pada paving masinal
(0,117 MPa) memiliki kualitas lebih jelek dari paving manual
(0,125 MPa) setelah diuji reaktivitas. Dari paving manual
diperoleh kesimpulan semakin tinggi penambahan variasi SCBA
maka kualitas paving semakin baik. Kuat tekan cenderung meningkat, ketahanan terhadap aus meningkat, dan daya serap
air lebih kecil. Pengaruh curing dengan suhu 60°C juga dapat
meningkatkan hasil kuat tekan sebesar 11,666 MPa, sedangkan
non curing sebesar 9,501 MPa pada umur 28 hari dengan variasi
SCBA 25%.
Namun berdasarkan SNI 03-0691-1996 tentang paving
block, dari enam variasi paving geopolimer tidak ada satupun
yang memenuhi persyaratan. Jika disesuaikan berdasarkan SNI
03-0349-1989 tentang bata beton untuk pasangan dinding,
paving geopolimer dengan variasi SCBA 0%, 15%, 20%, 25%,
dan 30% masuk dalam klasifikasi mutu II. Sedangkan variasi
SCBA 35% masuk dalam klasifikasi mutu I.
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PT. Kasmaji Inti Utama (PT. KIU) is a chemical factory
which produces bottom ash as waste. Bottom ash is a by-product
of coal combustion. It has larger and denser particle size than fly
ash. Sugar cane bagasse ash (SCBA) is a by-product material of
sugar process in the factory. With bottom ash, SCBA is used as
base material of paving geopolymer.
Mix design of paving geopolymer are prepared with a ratio
of paste to aggregate is 30:70, ratio of bottom ash to alkali is
70:30, and the alkali solution from NaOH 14M to sodium silicate
was 1:2,5. The addition of water is 5/30 part from alkali weight.
This research compares mechanical properties of paving using
automatical machine and manual machine.
Paving geopolymer produced with manual process is better
than using automatical process. It was because of bottom ash
which was used in paving geopolymer had different quality
between manual and automatical process. Reactivity of bottom
ash for automatical process was less than manual ones. Paving
with manual process has higher quality when more SCBA was
added. Compressive strength and abrassive ability increased, and
water absorbtion decreased. Effect of curing at temperature 60°C
improved compressive strength about 11,7 MPa. Meanwhile
compressive strength for non-curing about 9,5 MPa at 28 days
with 25% of SCBA as bottom ash substitution. According to SNI 03-0691-1996 on paving blocks, among
six variations of paving geopolymer there none met the
requirement. Based on SNI 03-0349-1989 about concrete brick
wall, paving geopolymer with variations of SCBA 0%, 15%, 20%,
25%, and 30% was classified as quality II. While variations
SCBA 35% was classified as quality I.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSS 624.183 4 Pri p |
| Uncontrolled Keywords: | paving, geopolimer, bottom ash, SCBA, curing, non curing |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA683 Precast concrete construction. Prestressed concrete construction. |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 09 Dec 2019 03:21 |
| Last Modified: | 18 Apr 2024 10:35 |
| URI: | http://repository.its.ac.id/id/eprint/72296 |
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