Pengaruh Perendaman Air Laut Terhadap Kuat Tekan Beton SCC dengan Penambahan Fly Ash dan Sika Viscocrete

Influence of Seawater Immersion on the Compressive Strength of Self-Compacting Concrete (SCC) with Fly Ash and Sika Viscocrete Additives

Perendaman air laut seringkali mempengaruhi kekuatan tekan beton SCC dengan fly ash dan Sika ViscoCrete. Penelitian ini bertujuan untuk mengetahui pengaruh perendaman air laut terhadap kuat tekan beton Self Compacting Concrete (SCC) dengan penambahan fly ash dan Sika Viscocrete. Variasi campuran beton meliputi fly ash sebanyak 0% dan 30% dari berat semen, serta Sika Viscocrete sebesar 1%. Pengujian kuat tekan dilakukan pada umur beton 7, 14, dan 28 hari. Hasil penelitian menunjukkan bahwa perendaman air laut memberikan pengaruh signifikan terhadap kuat tekan beton SCC, dengan nilai kuat tekan beton lebih tinggi dibandingkan perendaman air tawar. Kesimpulan dari pengujian kuat tekan dengan perendaman air tawar adalah terjadi peningkatan kuat tekan di usia 14 hari dan 28 hari. Kuat tekan optimum di perendaman air tawar tercapai di usia 28 hari menggunakan campuran fly ash 30%yaitu 54,1 MPa. Pada perendaman air laut terjadi penurunan kuat tekan di usia 14 hari dan 28 hari. Kuat tekan optimum berada di usia 7 hari dengan campuran fly ash 30% yaitu 56,1 MPa. Dari kesimpulan kedua metode curing tersebut diperoleh kuat tekan optimum berada di perendaman air laut dengan penambahan fly ash sebesar 30% yaitu 56,1 MPa.

Kata Kunci: beton SCC, fly ash, Sika Viscocrete, perendaman air laut, kuat tekan.

Seawater immersion often affects the compressive strength of SCC concrete with fly ash and Sika ViscoCrete. This study aims to determine the effect of seawater immersion on the compressive strength of Self-Compacting Concrete (SCC) with the addition of fly ash and Sika Viscocrete. The concrete mix variations include 0% and 30% fly ash by cement weight, as well as 1% Sika Viscocrete. Compressive strength testing was conducted at concrete ages of 7, 14, and 28 days. The results showed that seawater immersion significantly influenced the compressive strength of SCC, with higher compressive strength values compared to freshwater immersion. The conclusion from the compressive strength test with freshwater immersion indicated an increase in compressive strength at 14 and 28 days. The optimum compressive strength in freshwater immersion was achieved at 28 days using a 30% fly ash mix, reaching 54.1 MPa. In seawater immersion, a decrease in compressive strength was observed at 14 and 28 days, with the optimum compressive strength occurring at 7 days using a 30% fly ash mix, reaching 56.1 MPa. Based on the conclusions from both curing methods, the optimum compressive strength was obtained in seawater immersion with the addition of 30% fly ash, reaching 56.1 MPa.

Keywords: SCC concrete, fly ash, Sika Viscocrete, seawater immersion, compressive strength.