Analisis Printability Beton 3D Printing Berbasis Hvfa Melalui Ekperimental Dan Simulasi Numerik

Arrafid, Rifqi Nadhif (2025) Analisis Printability Beton 3D Printing Berbasis Hvfa Melalui Ekperimental Dan Simulasi Numerik. Masters thesis, Institut Teknologi Sepulu Nopember.

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Abstract

Studi ini membahas tentang pengaruh variasi penambahan admixture berupa PCE dan SNF terhadap beton printability beton high volume fly ash (HVFA) yang dianalisis secara experimental dan numerik. Beton HVFA digunakan sebagai material utama, meskipun memiliki kelemahan seperti kuat awal rendah dan waktu pengerasan panjang. Untuk mengatasi ini, admixture seperti calcium chloride (CaCl2) sebagai akselerator dan polycarboxylate ether (PCE) sebagai high-range water reducing agent (HRWRA) ditambahkan. Campuran HRWRA jenis sulphonated naphtalene formaldehyde (SNF) ditambahkan sebagai perbandingan. Penelitian ini mengevaluasi pengaruh variasi penambahan PCE (0.15%, 0.20%, 0.25%, 0.50%) dengan variabiel MC1S0P0.15, MC1S0P0.20, MC1S0P0.25, dan MC1S0P0.50 dan sulphonated naphtalene formaldehyde (SNF) 0.50% dengan variabel MC1S0.50P0 terhadap sifat rheologi dan mekanis beton 3D printing HVFA. Metode pengujian meliputi uji slump flow, unconfined compression test, direct shear test, dan uji kuat tekan 28 hari. Hasil menunjukkan bahwa penambahan PCE meningkatkan flowability berdasarkan nilai slump flow, dengan campuran optimum pada 0.25%. Uji simulasi menunjukkan campuran MC1S0P0.25 menunjukkan stabilitas penampang lebih baik dibandingkan MC1S0P0.50, dengan shape retention factor (SRF) masing-masing 0.69 dan 0.44. Simulasi numerik menunjukkan deformasi lebih kecil pada MC1S0P0.25 dibandingkan MC1S0P0.50. Analisis kuat tekan pada umur 28 hari menunjukkan peningkatan kuat tekan dengan penambahan PCE, mencapai 59.36 MPa pada MC1S0P0.50. Variasi campuran menunjukkan perbedaan signifikan terhadap standar mutu beton struktural, dipengaruhi oleh rasio water-to-binder (w/b) yang rendah. Berdasarkan hasil penelitian didapatkan bahwa pengaruh penambahan PCE pada campuran beton 3D printing dapat meningkatkan workability dan Kuat tekan usia awal, akan tetapi, kekuatan usia awal beton 3D printing turun.
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This study discusses the influence of variations in the addition of admixtures, specifically Polycarboxylate Ether (PCE) and Sulphonated Naphthalene Formaldehyde (SNF), on the printability of High Volume Fly Ash (HVFA) concrete, analyzed through experimental and numerical methods. HVFA concrete is used as the primary material, despite its drawbacks such as low early strength and prolonged setting time. To address these issues, admixtures like calcium chloride (CaCl2) are added as accelerators, and PCE is used as a high-range waterreducing agent (HRWRA). The SNF type HRWRA is added for comparison.The research evaluates the effects of varying PCE additions (0.15%, 0.20%, 0.25%, 0.50%) with variables MC1S0P0.15, MC1S0P0.20, MC1S0P0.25, and MC1S0P0.50, and SNF at 0.50% with the variable MC1S0.50P0, on the rheological and mechanical properties of HVFA 3D printing concrete. Testing methods include slump flow tests, unconfined compression tests, direct shear tests, and 28-day compressive strength tests.The results indicate that the addition of PCE enhances flowability based on slump flow values, with the optimum mixture at 0.25%. Simulation tests show that the MC1S0P0.25 mixture exhibits better cross-sectional stability compared to MC1S0P0.50, with shape retention factors (SRF) of 0.69 and 0.44, respectively. Numerical simulations indicate smaller deformation in MC1S0P0.25 compared to MC1S0P0.50. The compressive strength analysis at 28 days shows an increase in strength with the addition of PCE, reaching 59.36 MPa in MC1S0P0.50. Variations in the mixture demonstrate significant differences in structural concrete quality standards, influenced by a low water-to-binder (w/b) ratio.Based on the research findings, it is concluded that the addition of PCE in 3D printing concrete mixtures can improve workability and early-age compressive strength; however, the early strength of 3D printing concrete decreases.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	3D printing concrete, flowability, printability, ATENA software,
Subjects:	T Technology > T Technology (General) > T57.62 Simulation T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA440 Concrete--Cracking.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis
Depositing User:	RIFQI NADHIF ARRAFID
Date Deposited:	04 Feb 2025 07:42
Last Modified:	04 Feb 2025 07:42
URI:	http://repository.its.ac.id/id/eprint/117892

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