Analisis Pengaruh Penambahan Seeding CSH Terhadap Kuat Tekan dan Durabilitas MOdifikasi-UHPC

Dzakwan, Hafidh Izzuddin (2025) Analisis Pengaruh Penambahan Seeding CSH Terhadap Kuat Tekan dan Durabilitas MOdifikasi-UHPC. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Beton Kinerja Ultra Tinggi atau Ultra-High Performance Concrete (UHPC) merupakan material semen inovatif yang dikenal karena kekuatan mekanik dan durabilitas superiornya yang berasal dari mikrostruktur betonnya yang padat. Upaya untuk lebih menyempurnakan performanya, terutama dalam percepatan pencapaian kekuatan dan durabilitasnya terus dilakukan. Salah satu metode yang bisa digunakan ¬adalah memodifikasi komposisi materialnya, seperti penambahan seeding CSH untuk mempercepat proses hidrasi, selanjutnya material ini dinamakan Modifikasi-UHPC. Penelitian ini tidak hanya bertujuan untuk melihat pengaruh penambahan seeding CSH terhadap kuat tekan dan durabilitas Modifikasi-UHPC, tapi juga untuk menganalisis distribusi partikel dan pola XRD dari seeding CSH sehingga dapat diperoleh reaksi hidrasi yang terbaik. Metodologi penelitian ini diawali dengan pembuatan seeding CSH secara mandiri, dilanjut pembuatan campuran Modifikasi-UHPC dengan variasi kadar seeding CSH sebesar 0%, 1%, dan 2%. Evaluasi performa dilakukan secara komprehensif. Kuat tekan diuji melalui uji kuat tekan pada umur 3, 7, dan 28 hari (ASTM C39-18). Sementara itu, karakterisasi mikrostruktur dan parameter durabilitas dianalisis melalui serangkaian uji non-destruktif yang mencakup uji porositas (ASTM C642-21), Ultrasonic Pulse Velocity (UPV) (BS 1881 Part 203-86), dan resistivity (AASHTO TP95-11). Hasil penelitian menunjukkan bahwa penambahan seeding CSH memberikan pengaruh yang baik terhadap properti Modifikasi-UHPC. Penambahan seeding CSH pada kadar tertentu mampu mempercepat pencapaian kuat tekan terutama pada 28 hari, berturut turut dari variasi 0%, 1%, dan 2% adalah 53,74 MPa; 69,90 MPa; dan 73,91 MPa. Hasil tersebut sejalan dengan nilai porositas, berturut turut: 3,47%; 3,3%; dan 3,15%. Fenomena ini berkorelasi dengan hasil uji UPV berturut turut: 4862,44 m/s; 4734 m/s; 4927,89 m/s dan resistivitas listrik berturut turut 98,6 kΩcm, 99,2 kΩcm, dan 112,9 kΩcm. Namun, ada sedikit penurunan hasil UPV dari 0% ke 1%. Tren hasil kuat tekan semua variasi cenderung naik pada umur 3, 7, dan 28 hari. Sehingga seeding CSH memiliki potensi sebagai aditif untuk meningkatkan performa UHPC.
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Ultra-High Performance Concrete (UHPC) is an innovative cementitious material known for its superior mechanical strength and durability derived from its dense concrete microstructure. Efforts to further improve its performance, especially in accelerating the achievement of strength and durability, are ongoing. One method that can be used is to modify the material composition, such as the addition of CSH seeding to accelerate the hydration process. This research aims not only to examine the effect of adding CSH seeding on the compressive strength and durability of modified UHPC, but also to analyze the particle distribution and XRD pattern of CSH seeding in order to obtain the best hydration reaction..
The methodology of this research begins with the manufacture of CSH seeding independently, followed by the manufacture of Modified-UHPC mixtures with variations in CSH seeding levels of 0%, 1%, and 2%. Performance evaluation was conducted comprehensively. The compressive strength was tested through the compressive strength test at the age of 3, 7, and 28 days (ASTM C39-18). Meanwhile, microstructure characterization and durability parameters were analyzed through a series of non-destructive tests including porosity (ASTM C642-21), Ultrasonic Pulse Velocity (UPV) (BS 1881 Part 203-86), and resistivity tests (AASHTO TP95-11). The results of the study indicate that the addition of CSH seeding has a positive effect on the properties of modified UHPC. The addition of CSH seeding at certain levels can accelerate the achievement of compressive strength, particularly at 28 days, with the following values for the 0%, 1%, and 2% variations: 53.74 MPa; 69.90 MPa; and 73.91 MPa. These results align with the porosity values, respectively: 3.47%; 3.3%; and 3.15%. This phenomenon correlates with the UPV test results, which are 4862.44 m/s; 4734 m/s; 4927.89 m/s, and electrical resistivity of 98.6 kΩcm, 99.2 kΩcm, and 112.9 kΩcm, respectively. However, there was a slight decrease in UPV results from 0% to 1%. The trend of compressive strength results for all variations tended to increase at 3, 7, and 28 days. Thus, CSH seeding has the potential as an additive to enhance the performance of UHPC.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	UHPC, Seeding CSH, Kuat Tekan, Durabilitas, Dosis Optimal UHPC, CSH Seeding, Compressive Strength, Durability, Optimum Dosis
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) > TA440 Concrete--Cracking. T Technology > TA Engineering (General). Civil engineering (General) > TA441 Aggregates T Technology > TH Building construction > TH1461 Concrete construction.
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Hafidh Izzuddin Dzakwan
Date Deposited:	04 Aug 2025 07:48
Last Modified:	04 Aug 2025 07:48
URI:	http://repository.its.ac.id/id/eprint/125350

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