建筑材料处于高湿环境中,即在有液态水环境下,如地下建筑,被雨水冲刷的外围护结构等,材料的吸水性能及干燥能力的研究对控制和解决建筑热湿引起耐久性,保温性和与湿相关问题有至关重要的作用,而材料的吸水性能及干燥能力均与材料表面孔隙大小,面积百分数和分形维数相关.本文将采用盒计数维数法及德菜塞理论分析采用进行图像处理后的灰泥SEM图.结果表明灰泥样品不同位置的表面孔隙大小分布,面积百分数及分形维数均不同.其中表面微孔较多且分形维数较大一侧接触水的灰泥样品的吸水系数为0.10107 kg,/(m2·s0.5),表面微孔较少且分形维数较小一侧接触水的灰泥样品的吸水系数为0.04652 kg/(m2·s0.5),即对于多子孔材料-灰泥其吸水表面微孔越多,分形维数越大,其吸水系数相对越大,吸水能力越强.%The research on the water absorption and drying ability has an important function on the controlling and solving the hygrothermal problems, such as durability, thermal insulation .mold and indoor air quality, when the building materials is in the high humidity environment, especially there is liquid water, e. G. Substructure, exterior wall flushed by rain water. Pore size distribution , pore area fraction and fractal dimensition on the surface of porous building materials has a big influence on water absort-pion coefficent. The SEM photoes of eco - stucco was analyzed according to Delesse and fractal theory by box counting method. The results shows that pore size distribution, pore area fraction and fractal (timensition differ from different surface. Aw is 0.10107 kg/( m2 ? S°5) when there are lots of porous and larger fractal dimension on the surface of eco - stucco contacting with water, while Aw is 0.04652 kg/(m2 ? S°'5) when there are less of porous with smaller fractal dimension. In one word, the surface character has a huge influence on the water absorption coefficient.
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