Self Compacted Concrete Dan Grouting Dari Beton Geopolymer

Trimurtiningrum, Retno (2008) Self Compacted Concrete Dan Grouting Dari Beton Geopolymer. Other thesis, Institut Teknologi Sepuluh Nopember Surabaya.

Text 3104100084-Undergraduate_Thesis.pdf - Accepted Version Download (24MB)

Abstract

Beton geopolymer adalah beton yang tidak menggunakan semen sebagai binder. Oleh karena itu, beton geopolymer dipandang sebagai salah satu solusi dalam pemecahan masalah peningkatnya pemanasan global akibat produksi semen Portland dan diharapkan menjadi alternatif baru selain beton konvensional. Beton geopolymer segar mempunyai sifat kekentalan yang kaku sehingga kondisinya tidak workable, padahal dalam proses pengecoran, workabilitas beton sangat dibutuhkan untuk mempermudah pelaksanaan di lapangan. Untuk mengatasi masalah workabilitas, telah ditemukan salah satu inovasi beton yaitu Self Compacted Concrete (SCC). SCC adalah campuran beton yang dapat memadat sendiri tanpa menggunakan alat pemadat (vibrator) (Sugiharto, Kusuma, Himawan, Dharma, 2001). Beberapa metoda yang telah diterapkan Okamura dan Ouchi (2003) untuk memperoleh sifat beton yang self-compactibility adalah : membatasi kandungan agregat, rasio water-powder yang rendah dan penggunaan bahan additive seperti superplasticizer. Diharapkan dengan penambahan superplasticizer, sifat geopolymer bisa menjadi lebih workable dan mempunyai waktu setting yang lebih panjang. Akan tetapi setelah dilakukan penelitian, ternyata hasil yang diperoleh adalah penambahan superplasticizer baik yang berbasis naphtelene sulphonated dan polycarboxylic ether hyper plasticizer tidak mempengaruhi waktu setting binder secara signifikan. Binder geopolymer tetap mempunyai waktu setting yang relatif cepat. Dengan waktu setting yang sangat cepat sangat sulit untuk membuat geopolymer dalam skala besar, sehingga disimpulkan aplikasi geopolymer untuk self compacted concrete sangat sulit diwujudkan dan dilaksanakan. Sehingga disimpulkan bahwa geopolymer lebih cocok digunakan untuk grout, karena skala pekerjaan yang dibutuhkan untuk grout jauh lebih kecil jika dibandingkan dengan skala untuk pekerjaan beton. Selain itu, sifat pasta geopolymer flow sehingga lebih cocok untuk pekerjaan grouting. Injection atau pressure grouting adalah proses memasukkan atau menginjeksikan material cementitious ke dalam tempat yang tidak dapat dicapai seperti di bawah pondasi struktur untuk tujuan menutup lapisan, retak dan celah atau mengisi rongga (Shroff, Shah, 1993). Variasi yang digunakan dalam penelitian ini adalah variasi molaritas (6Mt 8M dan 10 M) dan penambahan superplasticizer sampai 3 %. Dari hasil penelitian, temyata kuat tekan tertinggi adalah pada campuran tanpa penambahan superplasticizer. Kuat tekan tertinggi pasta geopolimer terdapat pada campuran MI0CAI.5SP0 yaitu 104,46 pada umur 28 hari dan kuat tekan tertinggi mortar geopolimer terdapat pada campuran M10CA1.5SP0 yaitu 71 pada umur 28 hari
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Geopolymer concrete is concrete that does not use cement as a binder. Therefore, geopolymer concrete is seen as one solution in solving the problem of increasing global warming due to Portland cement production and is expected to become a new alternative to conventional concrete. Fresh geopolymer concrete has a stiff viscosity so that it is not workable, even though in the casting process, concrete workability is needed to facilitate implementation in the field. To overcome workability problems, one concrete innovation has been discovered, namely Self Compacted Concrete (SCC). SCC is a concrete mixture that can compact itself without using a compactor (vibrator) (Sugiharto, Kusuma, Himawan, Dharma, 2001). Several methods that have been applied by Okamura and Ouchi (2003) to obtain self-compactible concrete properties are: limiting aggregate content, low water-powder ratio and the use of additive materials such as superplasticizers. It is hoped that with the addition of superplasticizer, the geopolymer properties can become more workable and have a longer setting time. However, after conducting research, it turned out that the results obtained were that the addition of superplasticizers, both based on sulphonated naphthelene and polycarboxylic ether hyper plasticizer, did not significantly affect the setting time of the binder. Geopolymer binder still has a relatively fast setting time. With a very fast setting time, it is very difficult to make geopolymer on a large scale, so it can be concluded that the application of geopolymer for self-compacted concrete is very difficult to realize and implement. So it is concluded that geopolymer is more suitable for grouting, because the scale of work required for grouting is much smaller compared to the scale for concrete work. In addition, the flow properties of geopolymer paste make it more suitable for grouting work. Injection or pressure grouting is the process of inserting or injecting cementitious material into places that cannot be reached such as under the foundation of a structure for the purpose of covering layers, cracks and gaps or filling cavities (Shroff, Shah, 1993). The variations used in this research were variations in molarity (6Mt 8M and 10 M) and the addition of superplasticizer up to 3%. From the research results, it turns out that the highest compressive strength is in the mixture without the addition of superplasticizer. The highest compressive strength of geopolymer paste is found in the MI0CAI.5SP0 mixture, namely 104.46 at the age of 28 days and the highest compressive strength of the geopolymer mortar is found in the M10CA1.5SP0 mixture, namely 71 at the age of 28 days

Item Type:	Thesis (Other)
Additional Information:	RSS 620.136 Tri s-1 2008
Uncontrolled Keywords:	beton geopolymer, fly ash, sodium hydroxide, sodium silicate , self compacted concrete, superplasticizer, grouting; geopolymer concrete, fly ash, sodium hydroxide, sodium silicate, self compacted concrete, superplasticizer, grouting
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction T Technology > TA Engineering (General). Civil engineering (General) > TA683 Precast concrete construction. Prestressed concrete construction. T Technology > TP Chemical technology > TP1140 Polymers
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	EKO BUDI RAHARJO
Date Deposited:	25 Jan 2024 03:41
Last Modified:	25 Jan 2024 03:41
URI:	http://repository.its.ac.id/id/eprint/105632

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