Komposisi 3D Printing Menggunakan Superplasticizer Dengan Variasi Fiber Polypropylene

Praluly, Dea Choirina Wahyu (2025) Komposisi 3D Printing Menggunakan Superplasticizer Dengan Variasi Fiber Polypropylene. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kementerian Pekerjaan Umum dan Perumahan Rakyat (PUPR) terus mempersiapkan diri menghadapi era industri 4.0 dengan mengadopsi teknologi informasi, salah satunya melalui penerapan 3D Printing di bidang konstruksi. Teknologi ini membuka peluang baru dalam efisiensi proses pembangunan, termasuk dalam pengembangan material beton yang dapat dicetak secara langsung. Penelitian ini dilakukan untuk mendukung inovasi tersebut dengan mengevaluasi karakteristik campuran beton 3D printing, khususnya yang menggunakan variasi serat polypropylene (PP) dan dua jenis superplasticizer, yaitu Sodium Naphthalene Formaldehyde (SNF) dan Polycarboxylate Ether (PCE), Tujuan utama dari penelitian ini adalah menentukan komposisi optimal yang dapat dicetak secara stabil dan memenuhi syarat kekuatan struktural.
Proses pencampuran dilakukan secara kering (dry-mix), dan pencetakan menggunakan mesin 3D printing di Workshop 3D Printing. Serat PP sepanjang 12 mm digunakan dalam kadar 0,1%, 0,15%, 0,2%, dan 0,25%. Pengujian meliputi workability, reologi (yield stress dan plastic viscosity) menggunakan ICAR Rheometer, kuat tekan umur 1 dan 28 hari, serta unconfined compressive test (UCT) pada hasil cetakan. Hasil menunjukkan bahwa peningkatan kadar serat PP cenderung menaikkan yield stress dan viskositas plastis, namun menurunkan flowability serta meningkatkan risiko segregasi dan penyumbatan. Pada kadar serat rendah sekalipun (0,04%), gejala segregasi mulai tampak. Superplasticizer tipe PCE menghasilkan viskositas lebih rendah dibanding SNF, mendukung proses ekstrusi, namun menurunkan workability lebih cepat.
Dari sisi jenis superplasticizer, tipe PCE menghasilkan viskositas plastis yang lebih rendah dibandingkan SNF, sehingga lebih mendukung proses ekstrusi. Namun, penggunaan PCE juga menunjukkan penurunan workability yang lebih cepat. Di sisi lain, performa pencetakan dengan serat PP 12 mm masih terbatas jika dibandingkan dengan studi (Tran et al., 2021) yang menggunakan serat 6 mm dengan kadar 0,113% dan mampu mencetak hingga 30 lapis.

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The Ministry of Public Works and Housing (PUPR) continues to prepare for the era of Industry 4.0 by adopting information technology, one of which is through the application of 3D printing in the construction sector. This technology opens new opportunities for improving construction efficiency, including in the development of printable concrete materials. This study was conducted to support such innovation by evaluating the characteristics of 3D printable concrete mixtures, particularly those incorporating variations of polypropylene (PP) fibers and two types of superplasticizers: Sodium Naphthalene Formaldehyde (SNF) and Polycarboxylate Ether (PCE). The main objective of this research is to determine the optimal mix composition that can be printed stably while meeting structural strength requirements.
The mixing process was carried out using the dry-mix method, and the printing was conducted using a 3D printing machine at the 3D Printing Workshop. PP fibers with a length of 12 mm were used at dosages of 0.1%, 0.15%, 0.2%, and 0.25%. Tests conducted include workability, rheological properties (yield stress and plastic viscosity) using the ICAR Rheometer, compressive strength at 1 and 28 days, as well as unconfined compressive tests (UCT) on the printed specimens. The results showed that increasing the PP fiber content tends to raise the yield stress and plastic viscosity, while reducing flowability and increasing the risk of segregation and clogging. Signs of segregation were observed even at the lowest fiber content (0.04%).
In terms of superplasticizer type, PCE produced lower plastic viscosity compared to SNF, thus supporting better extrudability. However, the use of PCE also led to a faster reduction in workability. On the other hand, the printability performance of the 12 mm PP fiber was still limited when compared to a previous study studi (Tran et al., 2021), which successfully printed up to 30 layers using 6 mm fibers at a dosage of 0.113%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	3D Printing, Admixture, Fiber Polypropelene, Superplasticizer, Rheologi, Kuat Tekan, Flowability,
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TA Engineering (General). Civil engineering (General) > TA439 Lightweight concrete. High strength concrete. T Technology > TA Engineering (General). Civil engineering (General) > TA440 Concrete--Cracking. T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction T Technology > TJ Mechanical engineering and machinery > TJ211 Robotics.
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Dea Choirina Wahyu Praluly
Date Deposited:	04 Aug 2025 02:16
Last Modified:	04 Aug 2025 02:16
URI:	http://repository.its.ac.id/id/eprint/126337

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