Electro-chemical Chloride Extraction (ECE) is considered one of the most effective techniques used to extract chloride ions from reinforced concrete structures. The effectiveness of using ECE depends on some important factors such as anode type, current intensity, extraction duration, type of rebar, and chemical properties of concrete. On the other hand, ECE may cause some detrimental effects on some mechanical properties of concrete and steel such as a reduction in bond and compressive strengths of concrete, and embrittlement (i.e. reduction in ductility) ductility of reinforcing steel.

The major aim of this research work was to investigate the effectiveness of ECE using locally available un-galvanized steel mesh with conductive cement paste anode as a new type of anode on a reinforced concrete slab as a structural element. The slab behavior before and after ECE was studied by determining compressive strength, water absorption rate, concrete chloride content, and steel corrosion potential. The slab behavior was studied taking into consideration the established steel arrangement with spacing 20 cm between re-bars. The effect of initial chloride content on chloride extraction efficiency was investigated. Effectiveness of ECE with small initial chloride content 0.4% and 0.8% was compared with that of high initial chloride content 2.5% to know whether the initial chloride content is an important factor in ECE effectiveness or not.

电化学氯化物萃取 (ECE) 被认为是用于从钢筋混凝土结构中萃取氯离子的最有效技术之一。使用 ECE 的有效性取决于一些重要因素，例如阳极类型、电流强度、提取持续时间、钢筋类型和混凝土的化学性质。另一方面，ECE 可能会对混凝土和钢材的某些力学性能产生不利影响，例如降低混凝土的粘结强度和抗压强度，以及钢筋的脆化（即延展性降低）延展性。

这项研究工作的主要目的是研究 ECE 的有效性，使用当地可用的未镀锌钢网和导电水泥浆阳极作为钢筋混凝土板上的新型阳极作为结构元件。通过确定抗压强度、吸水率、混凝土氯化物含量和钢腐蚀电位来研究 ECE 前后的板坯行为。考虑到钢筋间距为 20 厘米的已建立的钢筋布置，研究了板坯行为。研究了初始氯化物含量对氯化物萃取效率的影响。将初始氯化物含量为 0.4% 和 0.8% 的 ECE 的有效性与初始氯化物含量为 2.5% 的高初始氯化物含量进行比较，以了解初始氯化物含量是否是 ECE 有效性的重要因素。