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一、前言 非烧结粘土砖的耐久性试验,目前仍以未经使用的砖做为样品,在试验室内分别测定其干湿循环系数、碳化系数和冻融循环系数为依据进行评价。这有一定的科学性,但也存在一定的问题。这就是众所周知的,试验室的条件与实际建筑中材料所处综合自然条件究竟有一定差别。试验室的试验结果能否真实反映实际使用情况,人们尚有疑虑。为便于非烧结粘土砖的推广应用,在国家建材局科技发展司的鼓励、安排下,我们从实际建筑中取下已使用的非烧结粘土砖为样品,在测定其碳化深度和强度变化的同时,用X—射线衍射仪和电子显微镜对样品进行亚微观、微观分析,试图从非烧结粘土砖在实际使用过程中,宏观与亚微观、微观结构是否变化相结合的方法,来研究其耐久性。
I. INTRODUCTION The durability test of non-sintered clay bricks is still based on the unused bricks as samples, and the dry and wet cycle coefficients, carbonation coefficients, and freeze-thaw cycle coefficients were determined on the basis of the evaluation in the test room. This is a certain degree of science, but there are also certain problems. This is known to all, and the conditions of the laboratory are somewhat different from the actual natural conditions of the material in the actual building. Whether the test results of the laboratory can truly reflect the actual situation of use, people still have doubts. In order to facilitate the popularization and application of non-sintered clay bricks, under the encouragement and arrangement of the Science and Technology Development Department of the National Building Materials Bureau, we removed the non-sintered clay bricks used as samples from the actual building, and measured the carbonization depth and strength changes. The submicroscopic and microscopic analysis of samples using X-ray diffractometry and electron microscopy was carried out to study the durability of non-sintered clay bricks in practical use, combining macroscopic and submicroscopic and microscopic structural changes. .