Civil Engineering and Architecture Vol. 12(3), pp. 1738 - 1748
DOI: 10.13189/cea.2024.120335
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Effectiveness of Zeolite to Desalinate Seawater as Concrete Mixture

Aisyah ^*, Erizal , Heriansyah Putra
Department of Civil and Environmental Engineering, IPB University, Indonesia

ABSTRACT

The primary constituents of concrete comprise cement, fine aggregates, coarse aggregates, water, and additives. Water is pivotal for determining the quality of concrete, thereby influencing the water–cement ratio. In certain coastal regions of Indonesia, the scarcity of freshwater necessitates the use of seawater in concrete mixtures. However, seawater contains corrosive ions that can potentially damage concrete structures. Zeolites are effective in desalinating seawater through salt absorption and vary in size and concentration. This study examines the impact of variations in zeolite size and weight, as well as the effect of seawater salinity on the compressive strength of concrete. The samples were 10 × 20 cm cylindrical concrete, mixed with fresh water and seawater at salinities of 10, 20, 30, and 40 ppt. The tests for compressive strength were conducted at 7 and 28 days. The 7-day samples of seawater concrete exhibited higher compressive strength than 65% of the 28-day standard, attributed to the reaction of Tricalcium Aluminate (C₃A) with NaCl, which enhances the early-age compressive strength. Zeolites were tested at three average sizes—0.45 mm, 0.89 mm, and 1.77 mm—and at concentrations of 51.91 g/L, 103.82 g/L, and 155.73 g/L. The zeolite of 0.89 mm size and 155.73 g/L concentration was notably utilised. An increase in zeolite content for desalinating seawater correlates with reduced salinity, thereby enhancing the compressive strength of the concrete.

KEYWORDS
Compressive Strength, Concrete, Salinity, Seawater, Zeolite

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Aisyah , Erizal , Heriansyah Putra , "Effectiveness of Zeolite to Desalinate Seawater as Concrete Mixture," Civil Engineering and Architecture, Vol. 12, No. 3, pp. 1738 - 1748, 2024. DOI: 10.13189/cea.2024.120335.

(b). APA Format:
Aisyah , Erizal , Heriansyah Putra (2024). Effectiveness of Zeolite to Desalinate Seawater as Concrete Mixture. Civil Engineering and Architecture, 12(3), 1738 - 1748. DOI: 10.13189/cea.2024.120335.