Muna, Hanidz Arinal (2025) Analisis Pengaruh Penambahan Kalsium Nitrat (Ca(NO3)2) Terhadap Kekuatan Beton High-Early Strength (HES) Sebagai Material Perbaikan Airport Pavement. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Permasalahan perkerasan kaku (rigid pavement) di bandara yang mengalami kerusakan memerlukan solusi perbaikan cepat guna meminimalisir gangguan operasional penerbangan. Beton High-Early Strength (HES) menjadi alternatif utama untuk mempercepat waktu buka perkerasan, namun penggunaan semen portland tipe III sebagai komponen utama HES sudah tidak tersedia di pasaran. Untuk mengatasi hal tersebut, penelitian ini mengembangkan beton HES berbasis semen portland tipe I (OPC) dengan tambahan admixture berupa kalsium nitrat (Ca(NO3)2) sebagai non-chloride accelerator dan superplasticizer berbahan polycarboxylate ethers untuk meningkatkan workability beton. Penelitian ini bertujuan mengevaluasi efektivitas (Ca(NO3)2) dalam meningkatkan kekuatan awal beton HES sebagai material perbaikan airport pavement. Penelitian ini dilakukan melalui pembuatan sampel beton HES dengan tiga variasi kadar kalsium nitrat, yakni 0%, 1%, dan 2% terhadap berat binder. Faktor air semen (FAS) yang digunakan sebesar 0,3 dan kadar Sika ViscoCrete® 3115N sebesar 0,6%. Pengujian yang dilakukan mencakup uji waktu ikat awal semen (vicat apparatus), uji slump, uji kuat tekan beton pada umur 1, 3, 7, dan 28 hari, serta kuat lentur pada umur 3 dan 28 hari, sesuai dengan standar SNI dan ASTM terkait. Perencanaan mix design merujuk pada ACI 211.1 dan kriteria nilai slump sebesar 25-75 mm, kuat tekan minimum pada umur beton 1 hari ialah fc‘=35 MPa, serta kuat lentur rencana, fy=4,5 MPa. Hasil penelitian menunjukkan bahwa penambahan kalsium nitrat dapat mempercepat waktu ikat awal semen, menurunkan nilai slump, serta meningkatkan kuat tekan awal dan kuat lentur beton. Variasi HES-A2 dengan penambahan 2% Ca(NO3)2 menghasilkan performa paling optimal dengan nilai slump sebesar 45 mm kemudian kuat tekan umur 1, 3, 7, dan 28 hari nya berurutan sebesar 41.3, 45.5, 50.2, dan 61.5 MPa dan kuat lentur umur 3 dan 28 harinya sebesar 7,87 dan 8,4 MPa. Kemudian disusul dengan HES-A1 dengan penambahan 1% Ca(NO3)2 menghasilkan performa paling optimal dengan nilai slump sebesar 65 mm kemudian kuat tekan umur 1, 3, 7, dan 28 hari nya berurutan sebesar 34.3, 41.4, 46.3, dan 53.6 MPa dan kuat lentur umur 3 dan 28 harinya sebesar 7,73 dan 8 MPa. Adapun juga variasi HES-A0 tanpa penambahan Ca(NO3)2 menghasilkan nilai slump sebesar 40 mm kemudian kuat tekan umur 1, 3, 7, dan 28 hari nya berurutan sebesar 21.7, 35.6, 42.9, dan 47.5 MPa dan kuat lentur umur 3 dan 28 harinya sebesar 7,47 dan 7,87 MPa. Penelitian ini membuktikan bahwa penggunaan kalsium nitrat sebagai accelerator pada beton berbasis semen OPC tipe I efektif dalam menghasilkan beton HES untuk aplikasi perbaikan cepat rigid pavement pada infrastruktur bandara.
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The issue of rigid pavement at airports that is damaged requires a quick repair solution to minimize disruptions to flight operations. High-Early Strength (HES) concrete has become the primary alternative to accelerate the opening time of pavements, but the use of Type III Portland cement as the main component of HES is no longer available in the market. To address this issue, this research develops high-early-strength (HES) concrete based on type I Portland cement (OPC) with the addition of an admixture in the form of calcium nitrate (Ca(NO3)2) as a non-chloride accelerator and a polycarboxylate ether-based superplasticizer to improve the workability of the concrete. This research aims to evaluate the effectiveness of Ca(NO3)2 in enhancing the early strength of HES concrete as a material for airport pavement repair. This research was conducted by creating HES concrete samples with three variations of calcium nitrate content, namely 0%, 1%, and 2% relative to the binder weight. The water-cement ratio (WCR) used was 0.3, and Sika ViscoCrete® 3115N content was 0.6%. The tests conducted include the initial setting time of cement (Vicat apparatus), slump test, compressive strength test of concrete at 1, 3, 7, and 28 days, as well as flexural strength at 3 and 28 days, in accordance with the relevant SNI and ASTM standards. The mix design planning refers to ACI 211.1 and the slump value criteria of 25-75 mm, with a minimum compressive strength of concrete at 1 day of age being fc‘=35 MPa and a planned flexural strength of fy=4.5 MPa. The research results show that the addition of calcium nitrate significantly accelerates the initial setting time of cement, reduces the slump value, and increases the early compressive strength and flexural strength of concrete. The HES-A2 variation with the addition of 2% Ca(NO3)2 produced the most optimal performance with a slump value of 40 mm, followed by compressive strengths at 1, 3, 7, and 28 days of 41.3, 45.5, 50.2, and 61.5 MPa, respectively, and flexural strengths at 3 and 28 days of 7.87 and 8.4 MPa. This was followed by the HES-A1 variation with the addition of 1% Ca(NO3)2, which also produced the most optimal performance with a slump value of 60 mm, followed by compressive strengths at 1, 3, 7, and 28 days of 34.3, 41.4, 46.3, and 53.6 MPa, respectively, and flexural strengths at 3 and 28 days of 7.73 and 8 MPa. Additionally, the HES-A0 variation without the addition of Ca(NO3)2 produced a slump value of 40 mm, followed by compressive strengths at 1, 3, 7, and 28 days of 21.7, 35.6, 42.9, and 47.5 MPa, respectively, and flexural strengths at 3 and 28 days of 7.47 and 7.87 MPa. This study proves that the use of calcium nitrate as an accelerator in type I cement-based concrete is effective in producing HES concrete for rapid repair applications of rigid pavement in airport infrastructure.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Beton High-Early Strength, Kalsium Nitrat, Perkerasan Kaku, Airport Pavement, High-Early Strength Concrete, Calcium Nitrate, Rigid Pavement, Airport Pavement. |
| Subjects: | H Social Sciences > HD Industries. Land use. Labor > HD9622 Cement. Concrete. Cement and concrete additives T Technology > TA Engineering (General). Civil engineering (General) T Technology > TA Engineering (General). Civil engineering (General) > TA439 Lightweight concrete. High strength concrete. T Technology > TE Highway engineering. Roads and pavements > TE278.D523 Pavements, Concrete--Testing. |
| Divisions: | Faculty of Vocational > Civil Infrastructure Engineering (D4) |
| Depositing User: | Hanidz Arinal Muna |
| Date Deposited: | 05 Aug 2025 10:12 |
| Last Modified: | 05 Aug 2025 10:12 |
| URI: | http://repository.its.ac.id/id/eprint/126439 |
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