Masonry is one of the most common building envelope systems in the world, providing an excellent water protection solution against rain. Water transport in masonry walls composed of bricks and mortar joints can be strongly affected by the nature of the interface between brick and mortar. In this study, two-dimensional water uptake experiments and numerical simulations are performed to study the effect of interface resistance on moisture transport in masonry samples with horizontal and vertical interfaces. Neutron radiography is used to document the time- and space-resolved moisture content distribution in different masonry samples. In the simulation of moisture transport, an interface resistance models the imperfect contact between brick and mortar. A good agreement between measured and simulated moisture content distribution is observed for different masonry samples. Moisture transport in masonry could be strongly affected by the interface resistance, when interface is in proximity to moisture source. The orientation, horizontal or vertical, of the interface between brick and mortar does not have an influence on the value of the interface resistance. However, the interface resistance depends on the capillary pressure at the interface. In the range of capillary moisture transport, a lower capillary pressure at the interface will lead to a larger interface resistance.

中文翻译：

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用中子射线照相术和数值模拟确定砌体砖-水泥砂浆界面对水输送的抵抗力

砌体是世界上最常见的建筑围护结构系统之一，可提供出色的防水防雨解决方案。由砖和砂浆接缝组成的砌体墙中的水输送受砖和砂浆界面性质的强烈影响。本研究通过二维吸水实验和数值模拟研究界面阻力对具有水平和垂直界面的砌体样品水分输送的影响。中子射线照相术用于记录不同砖石样品中时间和空间分辨的水分含量分布。在水分输送模拟中，界面电阻模拟砖和砂浆之间的不完美接触。对于不同的砖石样品，观察到测量的和模拟的水分含量分布之间有很好的一致性。当界面靠近水分源时，砌体中的水分传输会受到界面电阻的强烈影响。砖与砂浆界面的水平或垂直方向对界面电阻值没有影响。然而，界面电阻取决于界面处的毛细管压力。在毛细管水分输送范围内，界面处较低的毛细管压力会导致较大的界面阻力。砖和砂浆之间的界面对界面电阻值没有影响。然而，界面电阻取决于界面处的毛细管压力。在毛细管水分输送范围内，界面处较低的毛细管压力会导致较大的界面阻力。砖和砂浆之间的界面对界面电阻值没有影响。然而，界面电阻取决于界面处的毛细管压力。在毛细管水分输送范围内，界面处较低的毛细管压力会导致较大的界面阻力。