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In the construction industry, the quality of concrete is crucial for the success of a project. The mechanical properties of concrete can be influenced by the choice of mixture and the type of water used. This research aims to examine the impact of using seawater, river water, and tap water on the compressive strength of concrete, considering the development of construction in areas with limited clean water. This study uses an experimental method by creating concrete mixtures with these three types of water and measuring their compressive strength at 14 and 28 days of age. The results show that the type of water used in the concrete mix significantly affects the compressive strength of the concrete. At 14 days, concrete with tap water had an average compressive strength of 26.47 MPa, concrete with river water 25.38 MPa, and concrete with seawater 25 MPa. At 28 days, concrete with tap water reached an average compressive strength of 27.56 MPa, concrete with river water 26.33 MPa, and concrete with seawater 20.89 MPa. The main differences are caused by the chemical content of each type of water, with seawater having a high chloride content that negatively impacts the compressive strength of the concrete. The use of tap water produces concrete with the best compressive strength, followed by river water, while seawater should be avoided to maintain the structural strength of the concrete.
Keywords: Compressive strength, Sea Water, River Water, PAM Water, Concrete, Mechanical.
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