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A Study on Natural Rain Surface Erosion of Different Walling Materials in Tropics

机译：热带地区不同墙体材料的天然雨水表面侵蚀研究

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This study presents most common phenomena observed on wall facades due to excessive rain in tropical climatic condition in Sri Lanka. The objective of this study is to understand the effect surface decay of walling materials. The most common walling materials such as brick, cement block, earth cement blocks and novel walling materials mud concrete block, geopolymer blocks were subjected to this study. Faade covering materials such as rough cement plaster and cement slurry plaster were studied. Intrinsic material properties were studied prior to natural rain erosion quantification. Basic engineering properties of water absorption, capillary action, surface roughness, compressive strength was studied. Material properties such as water absorption, surface roughness were studied. Ten years of rain was simulated to measure natural surface decay. The results show that, stronger materials and less surface rough materials are resistant to surface decay. Plastering is recommended to protect walling materials reduce the surface decay. Comparatively stronger walling materials are less prone to natural rain decay. Cement plasters and cement slurry plaster covering is the most suitable materials for heavy rain. Cement slurry plaster is the most suitable walling covering for rain drop bouncing areas in outdoor walls in Sri Lanka.
机译：这项研究提出了在斯里兰卡热带气候条件下由于过度降雨在墙外墙上观察到的最常见现象。这项研究的目的是了解墙面材料表面衰变的影响。本研究对最常见的墙体材料，如砖块，水泥块，泥土水泥块和新型墙体材料，泥浆混凝土块，地质聚合物块进行了研究。研究了外墙覆盖材料，例如粗糙的水泥灰泥和水泥浆灰泥。在自然雨水侵蚀量化之前，先对内在材料特性进行了研究。研究了吸水，毛细作用，表面粗糙度，抗压强度的基本工程特性。研究了材料性能，如吸水率，表面粗糙度。模拟了十年的降雨来测量自然表面衰变。结果表明，较强的材料和较少的表面粗糙材料可抵抗表面腐蚀。建议使用抹灰来保护墙面材料，以减少表面衰减。相对较坚固的墙壁材料不容易受到自然雨水的侵蚀。水泥灰泥和水泥浆灰泥覆盖是最适合大雨的材料。水泥浆灰泥是斯里兰卡室外墙壁上雨滴反弹区域最合适的墙面覆盖物。

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