KOMPOSISI BETON MUTU TINGGI 50 MPa DENGAN PENAMBAHAN SUPERPLASTISIZER

Utomo, Fadhol Maula Gagah (2021) KOMPOSISI BETON MUTU TINGGI 50 MPa DENGAN PENAMBAHAN SUPERPLASTISIZER. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan infrastruktur di indonesia menjadi salah
satu aspek yang diprioritaskan, penggunaan beton tidak luput
sebagai komponen material struktur penyusunnya. Seiring
perkembangan zaman, struktur bangunan mengalami
perkembangan yang pesat maka dibutuhkan beton dengan mutu
tinggi. Berdasarkan SNI 03-6468-2000, beton kekuatan tinggi
didefinisikan sebagai beton yang memiliki kuat tekan yang
diisyaratkan Fc’≥41,4 MPa. Untuk bisa membuat beton mutu
tinggi diperlukan nilai FAS (faktor air semen) yang rendah yaitu
berkisar antara 0,20 – 0,30. dimana fungsi air pada proses
pembuatan beton hanya sebagai pembantu reaksi kimia yang
terjadi pada beton.
Untuk mengatasi hal tersebut, pada penelitian ini penulis
menggunakan superplasticizer (SP) type F berbasis Naphthalene
Formaldehyde Sulphonate (NFS) dan polycarboxylic ether
(PCE). Interval dosis SP yang digunakan adalah 0.7-1.5 dan
metode pencampuran juga mempengaruhi efektivitas kerja
superplasticizer tersebut. Kemudian, pengujian untuk beton segar
yaitu uji slump untuk mengetahui workability dan untuk beton
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padat yaitu uji kuat tekan pada umur 7, 14 dan 28 hari. Metode
perawatan/curing dilakukan dengan cara perendaman air.
Hasilnya, nilai slump tertinggi menggunakan
superplasticizer berbasis polycarboxylic ether (PCE) dan
mampu mereduksi air penggunaan air rencana sampai 17%.
Namun kuat tekan tertinggi menggunakan superplasticizer
berbasis Naphthalene Formaldehyde Sulphonate (NFS) dengan
kuat tekan 7 hari mencapai 67% dari kuat tekan rencana. Namun
penurunan kuat tekan yang terjadi perlu diteliti lebih lanjut,
terutama untuk pengaruh penggunan semen portland compocite
cement.
Kata kunci: Beton, FAS, workability, superplasticizer.
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Infrastructure development in Indonesia is one of the
prioritized aspects, the use of concrete is not spared as a
component of its constituent structural material. Along with the
times, building structures are experiencing rapid development, so
high quality concrete is needed. Based on SNI 03-6468-2000, high�strength concrete is defined as concrete having a specified
compressive strength of Fc' 41.4 MPa. To be able to make high�strength concrete, a low FAS (water-cement factor) value is
needed, which is in the range of 0.20 – 0.30. where the function of
water in the process of making concrete is only as a helper for
chemical reactions that occur in concrete.
To overcome this, in this study the authors used a
superplasticizer (SP) type F based on Naphthalene Formaldehyde
Sulphonate (NFS) and polycarboxylic ether (PCE). The SP dose
interval used is 0.7-1.5 and the mixing method also affects the
effectiveness of the superplasticizer. Then, the test for fresh
concrete is thetest slump to determine workability and for solid
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concrete is the compressive strength test at the age of 7, 14 and 28
days. The method of treatment /curing is done by immersion in
water.
As a result, the value slump highest used superplasticizer
a-based polycarboxylic ether (PCE) and was able to reduce the
design water use up to 17%. However, the highest compressive
strength using superplasticizer a-based Naphthalene
Formaldehyde Sulphonate (NFS)with a compressive strength of 7
days reached 67% of the design compressive strength. However,
the decrease in compressive strength that occurs needs to be
investigated further, especially for the effect of using portland
composite cement.
Keywords: Concrete, FAS, workability, superplasticizer.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Beton, FAS, workability, superplasticizer
Subjects:	H Social Sciences > HD Industries. Land use. Labor > HD9622 Cement. Concrete. Cement and concrete additives
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Fadhol Maula Gagah Utomo
Date Deposited:	27 Aug 2021 00:59
Last Modified:	27 Aug 2021 00:59
URI:	http://repository.its.ac.id/id/eprint/90420

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