【作者】 陈炜；

【导师】 杨杨；

【作者基本信息】 浙江工业大学 ， 建筑与土木工程， 2011， 硕士

【摘要】 本文以玻化微珠保温砂浆外墙外保温系统为研究对象,针对该保温体系的抗裂层与保温层的粘结质量,通过实验研究论证应用红外热像仪进行质量检测的可行性。考虑到工程实际,以建筑物墙体的朝向,含水状态,缺陷大小与形状,所处升温与降温状态等为实验参数,从而模拟较为实际的工程环境,制作模型试样进行抗裂层与保温层粘结缺陷的红外热像法检测,并将红外热像法的图像与预设缺陷加以对比分析。本研究的主要结论如下：1、辐射率的精确把握对试样板面温度的确定是必不可少的,但因为缺陷的检测是受板面的温度变化所支配的,所以辐射率对缺陷特征的实验结果影响不大。本研究中抗裂层表面的辐射率约为0.86。2、在东南西三个朝向检测出的缺陷很明显,可以直观进行评判；北面缺陷显示欠佳,仅能直观判断缺陷的位置,缺陷大小反映不佳。3、当试样含水率变大时,保温材料导热系数加大,从而使缺陷表面与周围温差变大,热像图上缺陷的显示更为明显,有利检测结果的判断。4、红外热像仪对各种形状的缺陷均能实现较好检测；缺陷平面尺寸越大、深度越深检测效果越好。本研究的范围内,红外热像仪可实现缺陷平面尺寸≥20mm、深度≥3mm的缺陷的检测,能满足工程质量检测的要求。5、降温阶段的试样检测时缺陷形状比升温状态下更清晰稳定,可检测的时间段也更长。6、红外热像仪适用与玻化微珠保温砂浆类外墙外保温系统抗裂层的质量检测,但对聚苯板外墙外保温系统,红外热像仪可能只适用于大尺寸缺陷的检测。更多还原

【Abstract】 In this thesis, the feasibility of utilizing infrared thermal images apparatus for inspecting the quality of bond between anti-crack layers and insulation layer in external thermal insulation system on wall made of mortar with small expended and vitrified ball is investigated and discussed, based on the experimental study. Taking into account various exposure surroundings of buildings, the wall facing direction, moisture content, size and shape of defects layers are set as the testing parameters in this study. In order to inspect the quality of bond between anti-crack layers and insulation layer, samples with various defects are made in advance, and the thermal images obtained by the apparatus are analyzed and compared with the actual defects. The conclusion as follows can be drawn based on the testing results in this thesis:1. It is essential that accurate grasp of radiation rate of materials to determination of surface temperatures of the samples. As of temperature changes predominate inspection of defects, there is no significant influence of the radiation rate on experimental results of characteristics of defects. The radiation rate of anti-crack layer is0.86in this study.2. When defects are set in the exterior wall faced to east, south and west, their characteristics can be completely judged based on the obtained thermal images, but approximate locations of defects can be only estimated for the exterior wall faced to north.3. With moisture contents increase, thermal conductivity of insulated materials increases, and differences in temperatures increase between the surfaces of defects and its surroundings, more obvious display of the defects can be shown, which benefits effectiveness of inspection.4. Infrared thermal image apparatus can be used to inspect defects in anti-crack layer with various sizes and shapes. The larger size and depth of the defects are the better effectiveness of inspection is. In the range of this study, infrared thermal image apparatus can be used for inspecting defects with the sizes not smaller than20mm and the depths not smaller than3mm, which meets the need of inspection quality in construction engineering. 5. The shapes of defects can be shown much clearer and more stable in the thermal images for cooling phase (i.e., temperature drop) than that for heating phase (i.e., temperature rise).6. Infrared thermal image apparatus is suitable for quality inspection of anti-crack layer in external thermal insulation system on wall made of mortar with small expended and vitrified ball. However, for insulation system made of expanded polystyrene board, the method is only applicable to larger defects.更多还原