Wicaksono, Imanuel Adi (2026) Pengaruh Variasi Nanosilica terhadap Sifat Mekanis dan Durabilitas High Early Strength Concrete (HESC) sebagai Material Perbaikan Airport Pavement. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kebutuhan material perbaikan airport pavement menuntut beton dengan kuat awal tinggi, durabilitas baik, dan waktu pengerjaan efisien agar gangguan operasional bandara dapat diminimalkan. Penelitian ini bertujuan menganalisis pengaruh variasi nanosilica terhadap sifat mekanis dan durabilitas High Early Strength Concrete (HESC) sebagai material perbaikan perkerasan beton bandara. Variasi nanosilica yang digunakan adalah 0%, 0,5%, 1,0%, dan 1,5% terhadap berat binder, dengan campuran berbasis semen OPC, faktor air semen 0,30, superplasticizer PCE 0,8%, kalsium nitrat 2%, agregat maksimum 19 mm, serta perawatan water curing pada suhu ruang. Pengujian yang dilakukan meliputi slump, waktu ikat, kuat tekan pada umur 3 jam, 1 hari, 7 hari, dan 28 hari, kuat lentur 28 hari, slant shear 14 hari, serta pengujian durabilitas berupa resistivitas, permeabilitas udara, dan UPV pada umur 28 hari. Hasil pengujian menunjukkan bahwa penambahan nanosilica menurunkan slump dari 140 mm pada beton kontrol menjadi 100 mm, 70 mm, dan 50 mm pada variasi NS0.5, NS1.0, dan NS1.5, sedangkan waktu ikat awal menjadi semakin cepat dari 125 menit menjadi 70 menit. Kinerja mekanis terbaik diperoleh pada NS1.0 dengan kuat tekan 13,49 MPa pada 3 jam, 38,45 MPa pada 1 hari, 46,94 MPa pada 7 hari, dan 61,40 MPa pada 28 hari, serta kuat lentur 6,80 MPa dan slant shear 22,49 MPa. Pada aspek durabilitas, NS1.0 menghasilkan resistivitas 31,3 kΩcm, permeabilitas udara 0,083 × 10⁻¹⁶ m², dan UPV 4840 m/s dengan klasifikasi Excellent. Peningkatan ini terjadi karena partikel nanosilica berperan sebagai filler dan pozzolan aktif yang mempercepat pembentukan C-S-H, memadatkan mikrostruktur pasta semen, serta memperbaiki interfacial transition zone (ITZ). Namun, kadar NS1.5 menurunkan workability dan berpotensi menimbulkan aglomerasi partikel, sehingga efektivitas pemadatan berkurang. Analisis RAB menunjukkan biaya NS1.0 Rp2.878.741,47/m³, lebih tinggi dari beton normal K-600, tetapi masih lebih ekonomis dibanding material repair komersial; sehingga NS1.0 dinyatakan optimum berdasarkan workability, sifat mekanis, durabilitas, dan kelayakan biaya.
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The need for airport pavement repair materials requires concrete with high early strength, good durability, and efficient construction time to minimize operational disruption. This study analyzes the effect of nanosilica variation on the mechanical properties and durability of High Early Strength Concrete (HESC) as a repair material for airport pavement. The variations were 0%, 0.5%, 1.0%, and 1.5% by binder weight, using OPC cement, a water-cement ratio of 0.30, 0.8% PCE superplasticizer, 2% calcium nitrate, 19-mm maximum aggregate size, and water curing at room temperature. The tests included slump, setting time, compressive strength at 3 hours, 1 day, 7 days, and 28 days, 28-day flexural strength, 14-day slant shear, and durability tests consisting of electrical resistivity, air permeability, and UPV at 28 days. The results showed that nanosilica reduced slump from 140 mm in the control concrete to 100 mm, 70 mm, and 50 mm for NS0.5, NS1.0, and NS1.5, while initial setting time accelerated from 125 minutes to 70 minutes. NS1.0 produced the best mechanical performance, with compressive strengths of 13.49 MPa at 3 hours, 38.45 MPa at 1 day, 46.94 MPa at 7 days, and 61.40 MPa at 28 days, with 6.80 MPa flexural strength and 22.49 MPa slant shear strength. In terms of durability, NS1.0 produced resistivity of 31.3 kΩcm, air permeability of 0.083 × 10⁻¹⁶ m², and UPV of 4840 m/s with an Excellent classification. This improvement occurred because nanosilica acted as an active filler and pozzolanic material that accelerated C-S-H formation, densified the cement paste, and improved the interfacial transition zone. However, NS1.5 reduced workability and potentially caused particle agglomeration, decreasing densification effectiveness. Cost analysis showed that NS1.0 cost Rp2,878,741.47/m³, higher than K-600 concrete but more economical than commercial repair materials. Therefore, NS1.0 was optimum considering workability, mechanical properties, durability, and cost feasibility.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | nanosilika, beton high early strength, perkerasan bandara, sifat mekanis, durabilitas; nanosilica, high early strength concrete, airport pavement, mechanical properties, durability |
| Subjects: | 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 > TA Engineering (General). Civil engineering (General) > TA440 Concrete--Cracking. T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction T Technology > TE Highway engineering. Roads and pavements > TE278.D523 Pavements, Concrete--Testing. |
| Divisions: | Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4) |
| Depositing User: | Imanuel Adi Wicaksono |
| Date Deposited: | 01 Aug 2026 03:08 |
| Last Modified: | 01 Aug 2026 03:08 |
| URI: | http://repository.its.ac.id/id/eprint/142059 |
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