Experimentation on The Effect Of Different Curing Methods with Fly Ash Grade C and Grade F on Ultra-High Performance Concrete

Djalins, Adzan Rizki (2025) Experimentation on The Effect Of Different Curing Methods with Fly Ash Grade C and Grade F on Ultra-High Performance Concrete. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

The usage of Ultra-High-Performance Concrete (UHPC) in modern construction has gained significant attention due to its superior mechanical properties, one of which is its high compressive strength. Despite this advantage, various challenges and limitations still persists in utilizing and designing concrete structures. This study investigates the effects of different types of fly ash (fly ash class f and fly ash class c) and different curing methods on the compressive strength properties of UHPC. The primary objectives are to examine how varying content of fly ash class f and class c and different curing methods affect its compressive strengths. The experimental methodology involved preparing five different UHPC mixes with fly ash class f and class c contents of 10% and 20% for each class, with one control mix without fly ash., followed by curing using air curing method at room temperatures (25°C), water immersion curing at room temperature (25°C), chemical curing of 5% solution Hydrochloric Acid (HCL) and 5% solution Sodium Sulfare (Na2SO4), and steam curing at 90°C and 70% humidity. The results indicate that whilst fly ash decreases the early compressive strength, the gain in compressive strength is more significant than concrete mixes without fly ash. It is also found that fly ash class f is far superior for adding compressive strength to concrete than fly ash class c. Of the curing methods tested, steam curing is proven to strengthen the concrete samples the most at short curing durations, with water curing providing more compressive strength overall in a longer period of time. Despite the initial predicted strength of UHPC was expected to exceed 120 MPa, the results did not meet these expectations due to several factor, such as concrete wastes in the mixer mixing with the fresh concrete, as well as insufficient time to conduct longer curing for the sample. Despite these limitations, the study reveals that fly ash, and specifically fly ash class f, can improve the compressive strengths of UHPC, making it viable material for UHPC application in the future, with longer durations of curing periods.
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Penggunaan Beton Berkinerja Ultra Tinggi (UHPC) dalam konstruksi modern telah menarik perhatian karena sifat mekaniknya yang unggul, salah satunya adalah kuat tekannya yang tinggi. Meskipun memiliki keunggulan ini, berbagai tantangan dan keterbatasan masih ada dalam pemanfaatan dan perancangan struktur beton. Penelitian ini menyelidiki pengaruh berbagai jenis abu terbang (abu terbang kelas f dan abu terbang kelas c) dan metode pengawetan yang berbeda terhadap sifat kuat tekan UHPC. Tujuan utamanya adalah untuk menguji bagaimana berbagai kandungan abu terbang kelas f dan kelas c serta berbagai metode pengawetan memengaruhi kuat tekannya. Metodologi eksperimental melibatkan persiapan lima campuran UHPC yang berbeda dengan kadar abu terbang kelas f dan kelas c masing-masing 10% dan 20%, dengan satu campuran kontrol tanpa abu terbang, diikuti dengan pengawetan menggunakan metode pengawetan udara pada suhu ruangan (25°C), pengawetan rendam air pada suhu ruangan (25°C), pengawetan kimia larutan Asam Klorida (HCL) 5% dan larutan Natrium Sulfat (Na2SO4) 5%, dan pengawetan uap pada suhu 90°C dan kelembaban 70%. Hasilnya menunjukkan bahwa meskipun abu terbang mengurangi kuat tekan awal, perolehan kuat tekan lebih signifikan daripada campuran beton tanpa abu terbang. Ditemukan juga bahwa abu terbang kelas f jauh lebih unggul dalam menambah kuat tekan beton daripada abu terbang kelas c. Dari metode curing yang diuji, curing uap terbukti paling memperkuat sampel beton pada durasi curing pendek, sedangkan curing air memberikan kekuatan tekan lebih besar secara keseluruhan dalam jangka waktu lebih lama. Meskipun kekuatan awal UHPC diperkirakan melebihi 120 MPa, hasilnya tidak memenuhi harapan ini karena beberapa faktor, seperti limbah beton dalam mixer yang bercampur dengan beton segar, serta waktu yang tidak cukup untuk melakukan curing lebih lama pada sampel. Meskipun ada keterbatasan ini, penelitian ini mengungkapkan bahwa abu terbang, dan khususnya abu terbang kelas f, dapat meningkatkan kekuatan tekan UHPC, menjadikannya material yang layak untuk aplikasi UHPC di masa mendatang, dengan durasi periode curing yang lebih lama.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Ultra High-Performance Concrete, Fly Ash, Curing Method Beton Berkinerja Ultra Tinggi, Metode Curing
Subjects:	T Technology > TH Building construction T Technology > TH Building construction > TH1461 Concrete construction.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Adzan Rizki Djalins
Date Deposited:	04 Feb 2025 02:47
Last Modified:	04 Feb 2025 02:47
URI:	http://repository.its.ac.id/id/eprint/118022

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