Permeability of concrete is one of its most important characteristics determining the durability. In this study, water permeability of a new class of fiber reinforced concrete materials called Eco-Friendly Ductile Cementitious Composites (EDCC) was studied, with and without an applied compressive stress. Hollow-core specimens were used and permeability tests were performed under full flow-equilibrium conditions. Four applied stress levels of 0.3f_u, 0.4f_u, 0.5f_u and 0.6f_u were investigated, where f_u is the compressive strength of the EDCC in question. Permeability tests under identical conditions were carried out on plain control specimens without fiber reinforcement (termed Plain Cementitious Composites, PCC). The results indicated that the permeability of unstressed specimens declined over time due to the continuous hydration. A ‘critical’ compressive stress level (f_cc) was identified and defined, which when exceeded, a dramatic increase in the coefficient of permeability occurred. The ‘critical’ compressive stress level (f_cc) was noted to be between 0.5f_u ∼ 0.6f_u for EDCC and 0.4f_u ∼ 0.5f_u for PCC. In other words, EDCC was more damage tolerant than PCC, and even when f_cc was exceeded, the impact of stress on the permeability of EDCC was far less pronounced compared to PCC.

混凝土的渗透性是决定耐久性的最重要特征之一。在这项研究中，研究了一种新的纤维增强混凝土材料的水渗透性，该材料在有或没有施加压应力的情况下均称为环保型延性胶凝复合材料（EDCC）。使用空心样品，并在全流量平衡条件下进行渗透性测试。研究了四个施加的应力水平，分别为0.3 f _u，0.4 f _u，0.5 f _u和0.6 f _u，其中f _u是所讨论的EDCC的抗压强度。在没有纤维增强的普通对照样品（称为普通水泥基复合材料，PCC）上，在相同条件下进行了渗透性测试。结果表明，由于持续的水合作用，无应力试样的渗透性随时间下降。确定并定义了“临界”压应力水平（f _cc），当超过该水平时，渗透系数会急剧增加。的“关键”的压缩应力水平（˚F_立方厘米）被指出是0.5之间˚F _ü〜0.6 ˚F _ù为EDCC和0.4 ˚F _ü〜0.5 ˚F _ù用于PCC。换句话说，EDCC比PCC更耐损伤，即使超过f _cc，应力对EDCC渗透性的影响也远不如PCC明显。