This research aimed to investigate the effects of two types of crystalline waterproofing materials (CWPM): surface coating and admixture mixing type, on the corrosion behavior of reinforced concrete. For the first type, the effects of curing and different degrees of the defective coating (0.1 and 2% of the area) were investigated. For the second type, different dosages of crystalline waterproofing material admixtures (0.5, 0.8, 1, and 2% of cement content by weight) were studied. Impressed voltage was used to accelerate the steel corrosion. Compressive strength, time to initiate the observed first crack, and rust stain and corrosion extent of steel were studied. The results showed that while both crystalline types yielded improved compressive strength, both short- and long-term strength of mixing type specimens were significantly higher than those of the coated specimens. The benefit increased with the increase in dosage and age. In terms of steel corrosion, the mixing type seemed to indicate improved corrosion resistance. The 2% addition provided the most advantageous effects by delaying the onset of corrosion in reinforced concrete. However, the coated concrete slightly improved the corrosion resistance. The corrosions of steel in all specimens were similar regardless of the defects on coated areas and the curing condition. The mixing type revealed better performance for steel corrosion prevention than those of the coating type. Before and after immersion into NaCl solution, needle-like crystal structures of both the mixing and coating type specimens were observed. Some needle-like crystal in concrete with CWPM showed a high sulfur peak was similar to ettringite crystals in control concrete.

这项研究旨在研究两种类型的结晶防水材料（CWPM）：表面涂层和掺合料混合类型对钢筋混凝土的腐蚀行为的影响。对于第一种类型，研究了固化效果和缺陷涂层不同程度（面积的0.1％和2％）的影响。对于第二种类型，研究了不同剂量的结晶防水材料混合物（水泥重量的0.5％，0.8％，1％和2％）。外加电压被用来加速钢的腐蚀。研究了抗压强度，开始观察到的第一次裂纹的时间以及铁锈和锈蚀程度。结果表明，虽然两种晶体类型均具有改善的抗压强度，混合型试样的短期和长期强度均显着高于涂层试样。益处随着剂量和年龄的增加而增加。就钢的腐蚀而言，混合类型似乎表明耐蚀性得到改善。2％的添加量通过延迟钢筋混凝土中腐蚀的发生而提供了最有利的效果。但是，涂覆的混凝土稍微改善了耐腐蚀性。不论涂层区域和固化条件是否有缺陷，所有试样中的钢腐蚀情况均相似。混合型比涂层型具有更好的防钢腐蚀性能。浸入NaCl溶液之前和之后，观察到混合型和涂层型样品的针状晶体结构。