Chatarina, Niken and Masdar, Helmi and Isneini, mohd and Endro P Wahono, Endro and Dyah Indriana, Kusumawati (2025) Permeability and Compressive Strength of Normal Concrte Submerged in Sea and Brackish Water. Jurnal Teknologi, 87 (2). pp. 389-398. ISSN 2180-3722

Text PERMEABILITY AND COMPRESSIVE STRENGTH OF NORMAL CONCRETE SUBMERGED IN SEA AND BRACKISH WATER.pdf Download (5MB)

Abstract

Indonesia, an archipelagic nation with numerous rivers and the longest coastline in the world, is home to many small and simple piers, most of which utilize normal concrete. This study examines the permeability of concrete with a compressive strength of 22.5 MPa (fc’) and its degradation when immersed in seawater and brackish water at a small pier in Lampung, Indonesia. The immersion durations were 28 and 56 days. The permeability test samples and the immersed concrete samples for the compression test were cylinders with a diameter of 15 cm and a height of 30 cm, subjected to a split tensile test. Permeation depth was measured from the split samples. The standard permeability test resulted in a depth of 2.66 cm, meeting the material requirements for a strong, aggressive environment. The permeability of the samples immersed in seawater increased by 4.14% and 31.74%, while those immersed in brackish water increased by 6.65% and 24.21% at 28 and 56 days, respectively, compared to the standard permeability. A deeper permeation correlated with a reduction in compressive strength. The compressive strength of concrete submerged in seawater decreased by 1.3% and 29%, and by 7% and 18.5% when submerged in brackish water at 28 and 56 days, respectively, against the original fc’. The 10% reduction in compressive strength (Cc) at 28 and 56 days is reflective of permeability and can be expressed by the equation: 10% Cc = (-tan aa) t + Cf, where the permeability slope and Csf are constants.

Item Type:	Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Fakultas Teknik (FT) > Prodi Teknik Sipil
Depositing User:	Dr Niken Chatarina
Date Deposited:	18 Jun 2025 03:49
Last Modified:	18 Jun 2025 03:49
URI:	http://repository.lppm.unila.ac.id/id/eprint/54645

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