Pengaruh Variasi Curing Terhadap Kuat Tekan Dan Durabilitas Pada Beton Modifikasi-Ultra High Performance Concrete (UHPC)

Putra, Mukhammad Luthfi Satriagung Manggala (2025) Pengaruh Variasi Curing Terhadap Kuat Tekan Dan Durabilitas Pada Beton Modifikasi-Ultra High Performance Concrete (UHPC). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ultra High Performance Concrete (UHPC) merupakan material inovatif dengan kekuatan tekan sangat tinggi dan durabilitas unggul. Namun, implementasinya di Indonesia masih terkendala oleh biaya tinggi, keterbatasan material impor seperti silica fume dan serat baja, serta metode curing yang kompleks. Dari permasalahan tersebut, penelitian ini memodifikasi UHPC menggunakan bahan lokal yang lebih ekonomis dan memanfaatkan bahan limbah, yakni substitusi 40% semen dengan fly ash tipe F dari PLTU Paiton, dan penggantian silica fume dengan limestone powder mesh 3000 dan 5000, serta penggunaan serat poliamida sebagai pengganti serat baja.
Penelitian ini menggunakan metode eksperimen dengan empat variasi metode curing yaitu perendaman lime water (LW), perendaman air biasa (WI), burlap covered atau karung goni basah (BC), dan curing suhu ruang (RT). Sampel beton diuji tekan pada umur 7, 28, dan 56 hari untuk berdasarkan standar ASTM C39-18, resistivitas (AASHTO T 358 – 15), Ultrasonic Pulse Velocity (UPV) berdasarkan ASTM C597-83, porositas (ASTM C 642), dan densitas (ASTM C39-21). Seluruh pengujian menggunakan benda uji yang dibuat dari satu jenis mix design modifikasi-UHPC.
Berdasarkan hasil pengujian kuat tekan dan durabilitas, dari seluruh variasi curing pada 56 hari pengujian, metode lime water (LW) menunjukkan performa terbaik dengan fc’ 79,95 MPa, UPV 4878,3 m/s, resistivitas 192,98 kΩ·cm, dan porositas terendah 6,90%. Sedangkan, metode curing perendaman air biasa (WI) menghasilkan fc’ 74,03 MPa dan porositas 7,58%. Metode curing karung goni menghasilkan fc’ 67,88 MPa dan porositas 8,76%. Performa dengan metode suhu ruang menghasilkan kuat tekan terendah 64,26 MPa, UPV 4739,6 m/s, dan porositas tertinggi 10,23%. Sehingga, curing lime water merupakan metode paling efektif karena menjaga kelembapan dan ketersediaan Ca(OH)₂, sehingga mempercepat hidrasi, menurunkan porositas, dan meningkatkan kekuatan serta durabilitas beton modifikasi-UHPC untuk skala pengujian laboratorium.
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Ultra High Performance Concrete (UHPC) is an innovative material with very high compressive strength and superior durability. However, its implementation in Indonesia is still hampered by high costs, limited imported materials such as silica fume and steel fiber, and complex curing methods. From these problems, this study modifies UHPC using more economical local materials and utilizes waste materials, namely substituting 40% of cement with fly ash type F from Paiton PLTU, and replacing silica fume with limestone powder mesh 3000 and 5000, as well as the use of polyamide fiber as a substitute for steel fiber
This study uses an experimental method with four variations of curing methods, namely lime water immersion (LW), ordinary water immersion (WI), burlap covered or wet burlap sack (BC), and room temperature curing (RT). Concrete samples were tested for compression at the age of 7, 28, and 56 days based on ASTM C39-18 standards, resistivity (AASHTO T 358-15), Ultrasonic Pulse Velocity (UPV) based on ASTM C597-83, porosity (ASTM C 642), and density (ASTM C39-21). All tests used test specimens made from one type of modified mix design-UHPC.
Based on the results of compressive strength and durability tests, of all curing variations in 56 days of testing, the lime water (LW) method showed the best performance with fc’ 79.95 MPa, UPV 4878.3 m/s, resistivity 192.98 kΩ·cm, and the lowest porosity of 6.90%. Meanwhile, the ordinary water immersion (WI) curing method produced fc’ 74.03 MPa and porosity of 7.58%. The burlap sack curing method produced fc’ 67.88 MPa and porosity of 8.76%. Performance with the room temperature method produced the lowest compressive strength of 64.26 MPa, UPV 4739.6 m/s, and the highest porosity of 10.23%. Thus, lime water curing is the most effective method because it maintains moisture and the availability of Ca(OH)₂, thereby accelerating hydration, reducing porosity, and increasing the strength and durability of UHPC-modified concrete for laboratory testing scale.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	UHPC, Fly Ash, Curing, Kuat Tekan, Durabilitas, Lime Water, UHPC, Fly Ash, Curing, Compressive Strength, Durability, Lime Water
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials. T Technology > TA Engineering (General). Civil engineering (General) > TA439 Lightweight concrete. High strength concrete. T Technology > TD Environmental technology. Sanitary engineering > TD427.F58 Fly ash
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Mukhammad Luthfi Satriagung Manggala Putra
Date Deposited:	04 Aug 2025 02:51
Last Modified:	04 Aug 2025 02:51
URI:	http://repository.its.ac.id/id/eprint/125983

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