Federal University of Technology, Paraná (UTFPR), 4900 Deputado Heitor Alencar Furtado St, Curitiba, Paraná, CEP 81280-340, Brazil.
Federal University of Technology, Paraná (UTFPR), 4900 Deputado Heitor Alencar Furtado St, Curitiba, Paraná, CEP 81280-340, Brazil.
J Environ Manage. 2019 Apr 15;236:206-213. doi: 10.1016/j.jenvman.2019.01.065. Epub 2019 Feb 5.
The main objectives of this study were to develop new composites only from industrial wastes: overburden soil (40-60 wt%), dredging sludge from marine port sediments (20-40%) and lime production waste as a binder (15-30%). The axial resistance strength of the developed materials, on the 365th day, was 18.9 MPa and the values of apparent density and dilatation coefficient ranged from 2.69 to 3.14 g/cm³ and from 0.14 to 1.56%, respectively. Water absorption values after 90 days of cure varied between 8.9 and 15.1% and water resistance coefficient reached 1.17. They can be used for the production of construction materials such as tiles, bricks, and blocks, as road base and airfield runways, dam cores, industrial and municipal waste dumps bases, building foundations. The studies of the developed material, by the methods of XRD, AAS, SEM, EDS, DTA - DTG, tomographic mapping of the chemical elements and isotopic composition (LAMMA), demonstrated the synthesis of new formations, mainly amorphous, with small inclusions of crystalline structures. Results of leaching and solubility tests by the AAS method showed the full ecological compatibility of the developed materials with the environmental standards of Brazil.
覆土（40-60wt%）、海洋港口沉积物的疏浚淤泥（20-40%）和石灰生产废料作为粘结剂（15-30%）。所开发材料的轴向抗压强度在第 365 天时为 18.9MPa，表观密度和膨胀系数值分别在 2.69 至 3.14g/cm³和 0.14 至 1.56%之间。养护 90 天后的吸水率在 8.9%至 15.1%之间，水阻力系数达到 1.17。它们可用于生产建筑材料，如瓷砖、砖块和砌块，以及道路基层和机场跑道、水坝核心、工业和城市废物倾倒场基地、建筑物基础。通过 XRD、AAS、SEM、EDS、DTA-DTG、化学元素和同位素组成（LAMMA）的断层扫描映射等方法对所开发材料进行的研究表明，主要形成了非晶态新结构，其中含有少量的晶态结构。通过 AAS 方法进行的浸出和溶解度测试的结果表明，所开发材料具有完全的生态相容性，符合巴西的环境标准。
