Analisis Sifat Mekanis Dan Fisik Self Compacting Concrete-High Volume Fly Ash Dengn Variasi Poliamida Fiber

Vancius, Bony Albert (2023) Analisis Sifat Mekanis Dan Fisik Self Compacting Concrete-High Volume Fly Ash Dengn Variasi Poliamida Fiber. Other thesis, Instittut Teknologi Sepuluh Nopember.

Text 10111910010079_Undergraduate Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2025. Download (5MB) | Request a copy

Abstract

Self-Compacting Concrete (SCC) merupakan beton yang dapat memadatkan sendiri dan mengalir. SCCmemiliki komposisi fine material yang lebih tinggi dari beton normal. Penggunaan mineral admixture sebagai substitusi semen dengan kadar tinggi merupakan usaha dalam meningkatkan sifat rheologi SCC dengan signifikan dan harga yang relatif lebih murah. Penggunaan fly ash dalam dengan kadar tinggi dalam SCC disebut Self Compacting Concrete High Volume Fly ash (SCC-HVFA). Penggunaan Fly ash juga meningkatkan ketahanan dalam shringkage serta penurunan tingkat permeabilitas permukaan beton karena pori yang lebih sedikit. SCC-HFVA cenderung memilki kelemahan dalam elemen tarik karena pengaruh jumlah partikel halus yang meningkat sehingga munculah inovasi penggunaan serat sebagai solusi. Penambahan serat dalam dalam SCC-HVFA akan meningkatkan kemampuan lentur dan ketangguhan beton. Studi eksperimental ini menyelidiki sifat mekanis dan fisik SCC HVFA dengan polyamide fiber dengan pengujian resistivitas, ultrasonic pulse velocity, porositas, permeabilitas, kuat tekan, dan kuat tarik belah. Mix design berdasarkan metode ACI 237R-7 dengan penyesuaian konfigurasi 45% fly ash. Pengujian meliputi slump flow, L-box, dan V-funnel untuk mengetahui tingkat workabilitiy. Selain itu, dilakukan pengujian ultrasonic pulse velocity (UPV), permeability, resistivity, porosity, kuat tekan dan kuat tark belah untuk mengetahui sifat mekanis dan fisik. Hasil penelitian menunjukan polyamide fiber pada SCC-HVFA tidak memberikan peningkatan signifikan pada performa kuat tekan dan kuat tarik belah beton. Performa maksimal kuat tekan dan tarik belah tercapai pada mix design SCC-HVFA tanpa fiber, dengan nilai masing-masing 60.13 MPa dan 5.97 MPa. Penggunaan fiber pada mix SCC-HVFA menunjukkan visual keruntuhan yang unik, namun semakin tinggi presentase fiber menyebabkan kehilangan kapasitas momen maksimal pada benda uji. Performa resistivitas SCC-HVFA meningkat pada penggunaan fiber maksimal 0.9%. Sementara itu, performa porositas dan permeabilitas SCC-HVFA menurun seiring dengan penambahan fiber, namun beton masih dalam kategori baik. Polyamide fiber juga menurunkan performa UPV karena sifat plastik dari polyamide fiber. Hasil pengujian workability menunjukkan bahwa penggunaan fly ash dalam jumlah tinggi pada penelitian menghasilkan viskositas yang tinggi pada beton segar, sehingga belum memenuhi kategori SCC. Penambahan fiber juga semakin menurunkan memperburuk workability dari beton.
=================================================================================================================================
Self-Compacting Concrete (SCC) is a self-compacting and flowing concrete. SCC has a higher fine material composition than normal concrete. The use of mineral admixtures as a substitute for high levels of cement is an attempt to improve the rheological properties of SCC significantly and at a relatively lower price. The use of high levels of fly ash in SCC is called Self Compacting Concrete High Volume Fly ash (SCC-HVFA). The use of fly ash also increases shrinkage resistance and decreases the permeability of the concrete surface due to fewer pores. SCC-HFVA tends to have weaknesses in the tensile element due to the influence of the increasing number of fine particles, so the innovation of using fiber as a solution emerged. The addition of fiber in SCC-HVFA will improve the flexural ability and toughness of concrete. This experimental study investigated the mechanical and physical properties of HVFA SCC with polyamide fiber by testing resistivity, ultrasonic pulse velocity, porosity, permeability, compressive strength, and split tensile strength. The mix design was based on ACI 237R-7 method with 45% fly ash configuration adjustment. Tests included slump flow, L-box, and V-funnel to determine workability. In addition, ultrasonic pulse velocity (UPV), permeability, resistivity, porosity, compressive strength, and split tensile strength were tested to determine the mechanical and physical properties. The results showed that polyamide fiber in SCC-HVFA did not significantly improve the compressive and split tensile strength performance of concrete. The maximum compressive and split tensile strength performance was achieved in the SCC-HVFA mix design without fiber, with values of 60.13 MPa and 5.97 MPa, respectively. The use of fiber in the SCC-HVFA mix showed a unique visual collapse, but the higher percentage of fiber caused a loss of maximum moment capacity in the specimens. The resistivity performance of SCC-HVFA increased at the maximum fiber content of 0.9%. Meanwhile, the porosity and permeability performance of SCC-HVFA decreased with the addition of fiber, but the concrete was still in the good category. Polyamide fiber also decreased the UPV performance due to the plastic nature of polyamide fiber. The workability test results showed that the use of high amounts of fly ash in the study resulted in high viscosity of fresh concrete, thus not meeting the SCC category. The addition of fiber also further deteriorated the workability of the concrete.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Self Compacting Concrete, High volume fly ash, beton tulangan serat, sifat mekanik, permeabilitas, porositas, kecepatan pulsa ultrasonik, resistivitas, kekuatan lentur, kekuatan kompresi,tarik belah, serat polyamide, fly ash tipe-f Self CompPacting Concrete, High volume fly ash, fiber reinforcement concrete, mechanical properties, permeability, porosity, ultrasonic pulse velocity, resistivity, Flextrural strenght, compression strength, splitting tensile, polyamide fiber, fly ash type-f
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. 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:	Bony Albert Vancius
Date Deposited:	08 Aug 2023 06:21
Last Modified:	08 Aug 2023 06:21
URI:	http://repository.its.ac.id/id/eprint/103312

Actions (login required)

View Item