Pengaruh Lingkungan Sulfat Terhadap Beton Konvensional Dengan Berbahan Dasar Portland Composite Cement

Darmawan’, Muhammad Faishal (2022) Pengaruh Lingkungan Sulfat Terhadap Beton Konvensional Dengan Berbahan Dasar Portland Composite Cement. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Beberapa kasus beton memiliki kelemahan yaitu tidak tahan terhadap bahan kimia perusak yang biasa ditemukan di lingkungan agresif. Seperti lingkungan yang memiliki kandungan sulfat atau klorida yang tinggi. Permasalahan tersebut bisa diatasi dengan menggunakan semen berbahan dasar Portland Composite Cement, Penggunaan Semen PCC (Portland Composite Cement) menghasilkan ketahanan beton maupun mortar yang lebih baik daripada semen OPC dalam lingkungan air laut, asam atau sulfat, dengan metode perendaman beton pada larutan sulfat selama 3 bulan. Penelitian ini bertujuan untuk mengetahui pengaruh MgSO4 dan Na2SO4terhadap beton konvesional yang berbahan dasar Portland Composite Cement, dengan target kuat tekan 28 MPa.Nilai factor air semen 0,28 setelah direduksi sebayak 20% dari kondisi awal, Superplastizer Sika Viscocrete 3115 N tipe F berbasis polycarboxylic ether yang digunakan sebesar 0,6%, Perbandingan antara Na2SO4 dan MgSO4 Sebesar 1 : 1, Kadar Na2SO4 dan MgSO4 yang digunakan adalah 50 gram/liter dengan parameter uji kuat tekan, perubahan massa, pengujian nilai pH larutan yang dimana beton akan direndam pada Magnesium sulfat dan Natrium Sulfat selama 3 bulan. Sebelum dilakukan perendaman ,beton akan dilakukan perawatan curing terlebih dahulu selama 28 hari. Kemudian mengujia pH larutan untuk mengetahui perubahan nilai dari larutan. Penelitian ini menggunakan benda uji silinder ukuran 10 cm x 20 cm dengan target kuat tekan sebesar 28 MPa sesuai SNI 2847 – 2019. Hasil pada uji beton PCC terhadap perubahan massa natrium sulfat selama 7 hari, 28 hari, 56 hari dan 83 hari adalah berturut-turut 0,13%,0,21%,0,45% dan 0,44%. Sedangkan pada magnesium sulfat selama 7 hari, 28 hari, 56 hari dan 84 hari adalah berturut-turut 0,10%,0,16%,0,35% dan 0,52%. Hasil pada uji kuat tekan selama 28,56 dan 84 hari dengan hasil maksimal sebesar 42,08 Mpa dan mengalami penurunan pada pengujian hari ke-28 dengan paparan magnesium dan natrium sebesar 28,86% dan 28,76%. Hasil pada pengujian pH larutan magnesium selama 1,3,7,21,28 dan 56 hari didapatkan hasil secara berturut-turut 9,9%,2,8%,4,6%,1,3%,1,1%,1,9% dan 0,9%. Hasil pada pengujian pH larutan Natrium selama 1,3,7,21,28 dan 56 hari didapatkan hasil berturut-turut sebesar 5,6%,11,6%,0,6%,1,5%,6,2%,0,9% dan 0,8%. Dapat disimpulkan bahwa hasil ini sesuai standar ASTM C 39/C 39M-03 dan (SNI 1974:2011, 2011). untuk uji kuat tekan. (ASTM C267- 01, n.d.) untuk perubahan massa, dan ASTM D1293 (2012) untuk uji pH.
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Some cases of concrete have a weakness, namely that it is not resistant to chemical destroyers commonly found in aggressive environments. Such as environments that have high sulfate or chloride content. These problems can be overcome by using cement based on Portland Composite Cement. The use of PCC Cement (Portland Composite Cement) produces better concrete and mortar resistance than OPC cement in seawater, acid or sulfate environments, by immersing concrete in a sulfate solution for 3 minutes. month. This study aims to determine the effect of MgSO4 and Na2SO4 on conventional concrete made from Portland Composite Cement, with a target compressive strength of 28 MPa. Sika Viscocrete superplastizer type F based on polycarboxylic ether used 0.6%, the ratio between Na2SO4 and MgSO4 is 1: 1, Na2SO4 and MgSO4 levels used are 50 grams/liter with parameters for compressive strength test, mass change, testing the pH value of the solution which is where the concrete will be soaked in magnesium sulfate and sodium sulfate for 3 months. Prior to immersion, the concrete will be treated with curing for 28 days. Then test the pH of the solution to determine the change in the value of the solution. This study uses a cylindrical specimen measuring 10 cm x 20 cm with a target compressive strength of 28 MPa according to SNI 2847 – 2019. The results of the PCC concrete test on changes in sodium sulfate mass for 7 days, 28 days, 56 days and 83 days were 0.13%, 0.21%, 0.45% and 0.44%, respectively. Meanwhile, magnesium sulfate for 7 days, 28 days, 56 days and 84 days was 0.10%, 0.16%, 0.35% and 0.52%, respectively. The results on the compressive strength test for 28.56 and 84 days with a maximum yield of 42.08 Mpa and decreased on the 28th day of testing with exposure to magnesium and sodium by 28.86% and 28.76%, respectively. The results of testing the pH of magnesium solution for 1,3,7,21,28 and 56 days obtained results respectively 9,9%,2,8%,4,6%,1,3%,1,1%, 1.9% and 0.9%. The results of testing the pH of the sodium solution for 1,3,7,21,28 and 56 days obtained results of 5,6%,11,6%,0,6%,1,5%,6,2%, respectively. 0.9% and 0.8%. It can be concluded that these results are in accordance with the standards of ASTM C 39/C 39M-03 and (SNI 1974:2011, 2011). for compressive strength test. (ASTM C267-01, n.d.) for mass change, and ASTM D1293 (2012) for pH test.

Item Type:	Thesis (Diploma)
Additional Information:	RSIS 620.136 Dar p-1 2022
Uncontrolled Keywords:	Beton PCC (Portlnd composite cemen), Mekanikal properties, Durabilitas. PCC (Portlnd composite cement) concrete, Mechanical properties, Durability.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Mr. Marsudiyana -
Date Deposited:	13 Jul 2026 03:02
Last Modified:	13 Jul 2026 03:02
URI:	http://repository.its.ac.id/id/eprint/134763

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