Université de Sfax, Laboratoire de Génie de l'Environnement et Ecotechnologie, GEET-ENIS, Tunisia.
LGCgE-Laboratoire de Génie Civil et géoEnvironnement, Département Génie Civil and Environnemental, IMT Lille Douai, Univ. Lille, France.
Waste Manag Res. 2020 Aug;38(8):876-885. doi: 10.1177/0734242X20910234. Epub 2020 Mar 13.
The management of dredged sediments poses serious environmental and economic problems because of their geochemical properties and in particular their pollutant content. In this research, marine sediments from Tunisian harbors were collected to study their beneficial reuse as construction materials using an eco-friendly polymer binder. Experimental investigations include the determination of physicochemical, mineralogical, and environmental parameters of sediments from the Sidi Mansour and Sidi Youssef areas in Tunisia. Prismatic mortar samples (4 × 4 × 16 cm) were prepared at laboratory scale using normalized sand and epoxy resin. Then their composition was modified by including a sediment fraction in the substitution of sand at rates ranging from 10 to 50% in dry mass. After a 7-day curing period, mortar samples were submitted to mechanical, physicochemical, and environmental analyses. Mortar samples including sediment fractions displayed lower strength than sand mortar used as control. This result is explained by the increase of porosity values in the mortar samples when sediment samples were incorporated. A positive relationship between porosity and compressive strength values was evidenced, suggesting that the compactness of granular skeleton could play an important role in the preparation of materials. From an environmental point of view, the mortar samples containing sediment fractions showed relatively low leaching levels, which confirms their suitability for the manufacturing of construction materials.
疏浚沉积物的管理由于其地球化学性质，特别是污染物含量，带来了严重的环境和经济问题。在这项研究中，从突尼斯的港口采集了海洋沉积物，以研究其作为建筑材料的有益再利用，使用环保型聚合物粘结剂。实验研究包括测定突尼斯 Sidi Mansour 和 Sidi Youssef 地区沉积物的物理化学、矿物学和环境参数。在实验室规模上使用标准砂和环氧树脂制备棱柱形砂浆样品（4×4×16 cm）。然后，通过在干质量中以 10%至 50%的比例替代砂来修改其组成，包括一部分沉积物。养护 7 天后，对砂浆样品进行机械、物理化学和环境分析。含有沉积物的砂浆样品的强度低于用作对照的砂砂浆。这一结果可以通过在砂浆样品中加入沉积物样品时增加孔隙率值来解释。证明了孔隙率和抗压强度值之间存在正相关关系，这表明颗粒骨架的密实度可能在材料制备中起重要作用。从环境角度来看，含有沉积物的砂浆样品显示出相对较低的浸出水平，这证实了它们适合制造建筑材料。
