ArticleMaterials (Basel, Switzerland)2026
Mechanical Properties and Microstructural Characterization of Concrete with Recycled Aggregates from 20-Year Marine-Exposed Structures.
Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study evaluated the mechanical properties and microstructural characteristics of concrete made with recycled concrete aggregates (RCAs) derived from a pier exposed to a tropical marine environment for more than 20 years. The RCA was characterized physically, chemically, and mechanically to assess porosity, inherited chemical contamination, and potential degradation mechanisms associated with prolonged marine exposure. New concretes were produced with 50% replacement of natural coarse aggregates by RCA and water-cement (W/C) ratios of 0.67, 0.61, and 0.47. Compressive strength was measured at 3, 7, and 28 days. The mixture with 50% RCA and W/C = 0.47 achieved a 28-day compressive strength of ≈22.8 MPa, exceeding the design strength of 21 MPa. The source concrete and derived RCA exhibited a thin-section air-void content of 3.3%, acid-soluble chloride content of 0.074% by mass of concrete, and SO
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