Pengaruh Kadar Serat Polipropilen Terhadap Sifat Lentur Ferosemen Dengan Matriks Modifikasi Ultra High-Performance Concrete (UHPC)

Adi, Uziel Danistya (2025) Pengaruh Kadar Serat Polipropilen Terhadap Sifat Lentur Ferosemen Dengan Matriks Modifikasi Ultra High-Performance Concrete (UHPC). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ferosemen adalah beton komposit yang terdiri dari semen, pasir, dan tulangan wiremesh, yang digunakan untuk meningkatkan kekuatan dan daktilitas, serta banyak diterapkan dalam konstruksi seperti atap dan dinding. Meskipun memiliki keunggulan seperti ketahanan tinggi dan biaya rendah, ferosemen rentan terhadap retak dan kegagalan getas. Penambahan serat polipropilen (PP) dalam studi ini diharapkan dapat meningkatkan sifat mekanik ferosemen. Selain itu, penggunaan fly ash sebagai bahan pengganti sebagian semen juga dapat mengurangi emisi karbon dengan pemanfaatan limbah dari sisa pembakaran PLTU. Penelitian ini mengeksplorasi pengaruh variasi kadar serat polipropilen terhadap sifat lentur ferosemen dengan fly ash, bertujuan untuk meningkatkan nilai kuat tekan dan kuat lentur material konstruksi sekaligus sebagai material yang ramah lingkungan sebagai ferosemen dengan matriks modifikasi Ultra High-Performance Concrete (UHPC). Metode penelitian dilakukan secara eksperimental membuat 4 variasi mortar ferosemen dengan kandungan fly ash sebesar 40% sebagai pengganti semen OPC dengan penambahan variasi serat polipropilen dengan 0%; 0,167%; 0,33%; dan 0,5%. Pengujian dilakukan pada umur 28 dan 56 hari yang meliputi uji kuat tekan dan densitas menggunakan silinder 7,5 x 15 cm (ASTM C39-21), uji porositas menggunakan silinder 10 x 5 cm (ASTM C642-21) dan uji lentur menggunakan pelat 2 x 5 x 47 cm (ASTM C947-03). Selain itu, dilakukan juga peninjauan pola retak dan lendutan pada uji lentur.
Hasil menunjukan nilai fc’ dengan variasi 0%; 0,167%; 0,33%; 0,5% dengan nilai fc’ 56,74; 80,05; 48,59; 44,59 MPa pada umur 28 hari dan 66,32; 86,37; 63,40; 55,97 MPa pada umur 56 hari dengan presentase kenaikan rata-rata 44,83%. Variasi 0,167% menunjukan nilai yang tertinggi pada uji tekan. Namun, pada uji lentur seiring penambahan serat menunjukan kenaikan kuat lentur. Variasi 0%; 0,167%; 0,33%; 0,5% dengan kuat lentur 11,36; 14,10; 14,24; 15,34 MPa pada umur 28 hari dengan kenaikan rata-rata 28,18%. Porositas menunjukan pola yang naik turun seiring penambahan serat. Variasi 0%; 0,167%; 0,33%; 0,5% dengan kadar porositas 2,56%; 1,56% 3,57%; 2,55% pada umur 28 hari. Nilai porositas masih memenuhi syarat diantara 1% - 6% berdasarkan ASTM C642-21.
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Ferrocement is a composite concrete composed of cement, sand, and wiremesh reinforcement, which is used to increase strength and ductility, and is widely applied in construction such as roofs and walls. Despite its advantages such as high durability and low cost, ferrocement is prone to cracking and brittle failure. This research is expected that the addition of polypropylene (PP) fiber can improve the mechanical properties of ferrocement. In addition, the use of fly ash as a partial replacement material for cement can also reduce carbon emissions by utilizing waste from the remaining combustion of power plants. This research will explore the effect of varying polypropylene fiber content on the flexural properties of ferrocement with fly ash, aiming to improve the performance of construction materials as well as environmentally friendly materials as ferrocement with Ultra High-Performance Concrete (UHPC) modified matrix.
The research method was conducted experimentally by making four variations of ferrocement mortar with 40% fly ash content as a substitute for OPC cement with the addition of polypropylene fiber variations of 0%; 0.167%; 0.33%; and 0.5%. Tests were conducted at 28 and 56 days, including compressive strength and density tests using 7.5 x 15 cm cylinders (ASTM C39-21), porosity tests using 10 x 5 cm cylinders (ASTM C642-21), and flexural tests using 2 x 5 x 47 cm plates (ASTM C947-03). Additionally, crack patterns and deflections were examined during the flexural tests.
The results showed fc’ values with variations of 0%; 0.167%; 0.33%; 0.5% with fc’ values of 56.74; 80.05; 48.59; 44.59 MPa at 28 days and 66.32; 86.37; 63.40; 55.97 MPa at 56 days, with an average increase of 44.83%. The 0.167% variation showed the highest value in the compression test. However, in the flexural test, an increase in flexural strength was observed with the addition of fibers. Variations of 0%; 0.167%; 0.33%; 0.5% with flexural strength of 11.36; 14.10; 14.24; 15.34 MPa at 28 days, with an average increase of 28.18%. Porosity showed a fluctuating pattern with increasing fiber content. Variations of 0%; 0.167%; 0.33%; 0.5% with porosity levels of 2.56%; 1.56%; 3.57%; 2.55% at 28 days. The porosity values still meet the requirements between 1% and 6% according to ASTM C642-21.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Ferosemen, Polipropilen, Fly Ash, Uji Lentur ferosemen, Serat, UHPC, Modifikasi UHPC.
Subjects:	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.
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Uziel Danistya Adi
Date Deposited:	04 Aug 2025 03:56
Last Modified:	04 Aug 2025 03:56
URI:	http://repository.its.ac.id/id/eprint/126784

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