Abstract
The aim of this study was to develop environment-friendly composites from dredged sediments (DS) from the seaport of Paranaguá, Brazil (30–70 wt %), wood ashes (WA) (5–40%), and lime production wastes (LPW) (15–30%). The materials' characterization was carried out by axial compressive and water resistance, water absorption, bulk density, XRD, MEV, EDS mapping, LAMMA, and AAS. The samples' axial resistance reached 2.39 MPa on the 3rd day, and 8.77 MPa on the 180th day. The water absorption values ranged from 9.5% to 17.2% on the 28th day and from 8.1% to 14.6% on the 90th day. All these changes took place due to the synthesis of amorphous materials, mainly carbonates. The developed composites can be used as road base materials, cementless concrete, non-fired brick and similar sustainable construction materials. The widespread DS use by this ecologically clean method can significantly improve oceans and industrial regions’ environmental situation and decrease natural resource consumption for civil construction.
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