The initiation and evolution of deformation-induced (micro)structures in one-component, cementitious, flexible waterproofing membranes is investigated combining normed crack-bridging (EN14891) with image analysis of in-situ photos acquired by optical and scanning electron microscopy. The permanent deformation of the polymer matrix concentrates in a trapezoidal deformation volume and subdivides into an active and a passive part. During the active part, the polymer matrix stretches and fibril-void microstructures (FVM) form. The ubiquitously present heterogeneities (quartz grains, cement particles and air pores) act as stress concentrators. After FVMs reach their maximum density inside the deformation volume, straining by passive stretching until final rupturing takes over. Starting at the substrate-membrane interface, the cracking propagates through the membrane along aforementioned heterogeneities and the spatially distributed FVMs. Linking mechanical behaviour and deformation structures is therefore crucial to (i) understand the complex elasto-plastic deformation and to (ii) develop new products increasing the durability of the protective system.

结合规范的裂纹桥接（EN14891）和通过光学和扫描电子显微镜获得的原位图像的图像分析，研究了单组分胶结柔性防水膜中变形诱导的（微观）结构的萌生和演化。聚合物基体的永久变形集中在梯形变形体积中，并细分为主动部分和被动部分。在活性部分期间，聚合物基质拉伸并形成原纤维微结构（FVM）。普遍存在的异质性（石英颗粒，水泥颗粒和气孔）充当应力集中器。在FVM达到变形体积内的最大密度之后，通过被动拉伸进行拉伸，直到最终破裂接管为止。从底物-膜界面开始，裂纹沿着上述异质性和空间分布的FVM通过膜传播。因此，将机械行为和变形结构联系起来对于（i）了解复杂的弹塑性变形和（ii）开发新产品以提高防护系统的耐久性至关重要。