The valorization solutions for dredged sediment have been the subject of a great number of investigations over the previous decades. In the current present study, treatment of polluted dredged sediment fom the commercial port of Sfax, Tunisia, is proposed. An industrial byproduct (blast furnace slag) was used to bind raw sediment for a reuse in road engineering.

Following standards of this field, the raw sediment first was identified and classified according to the French technical guidance. Then an environmental assessment was applied due to the presence of heavy metals. The concentrations were measured on the raw sediment particles so as to control the binding effect on heavy metals. Sediment mixtures consisted of a mix of sand and a blast furnace slag activated with quicklime. Different mixtures were tested and some were proposed for sub-layer applications. The Sfax commercial port raw sediment is considered as a sandy loam with a very low fraction of clay. The measured concentrations of heavy metals exceed the recommended thresholds for cadmium, copper, lead, and zinc. These can induce hazardous effects in the case of their dumping into the sea. On the other hand, the concentrations of the detected elements after leaching tests run on raw sediment samples are very low compared to the thresholds; such results highlight a possible recycling of the raw sediment in subgrade layers without any negative impact. Suitable formulations were deduced for road engineering tests relying on the ratio the California Bearing Ratio index and the immediate bearing index. If the obtained ratio exceeds one, the treated sediment can be recycled and used in road layers.

在过去的几十年中，疏dr沉积物的增值解决方案一直是许多研究的主题。在当前的当前研究中，提出了处理突尼斯斯法克斯商业港口污染的疏sediment沉积物的建议。工业副产品（高炉矿渣）用于粘结原始沉淀物，可在道路工程中重复使用。

遵循该领域的标准，首先根据法国技术指南对原始沉积物进行了识别和分类。然后由于存在重金属而进行了环境评估。测量原始沉淀物颗粒上的浓度，以控制对重金属的结合作用。沉积物混合物由沙子和用生石灰活化的高炉矿渣的混合物组成。测试了不同的混合物，并提出了一些用于亚层应用的混合物。斯法克斯商业港口的原始沉积物被认为是砂壤土，粘土含量极低。测得的重金属浓度超过了建议的镉，铜，铅和锌阈值。在将其倾倒入海的情况下，它们可能引起危险影响。另一方面，与原始阈值相比，对原始沉积物样品进行浸出测试后，所检测元素的浓度非常低；这样的结果强调了路基层中原始沉积物的可能再循环，而没有任何负面影响。根据加利福尼亚轴承比率指数和直接轴承指数之比推导得出适合道路工程测试的配方。如果获得的比例超过1，则可以将处理过的沉积物回收并用于路面层。