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本文将建筑用密封材料,按其接缝变形率分成小、中、大三类,即它们在整个使用期间能承受的最大拉伸和(或)压缩量分别为±5%、±12%和±25%。文中介绍了Murphy定律,用该定律和所测得的初始接缝宽度,能确定最大温度梯度。我们把各种属性的密封材料分成这样三类,所强调的是使建筑人员可利用现有的规范来选材。文末给出了几张表格,比较了各类密封材料的几个参数,同时还列出了美国试验与材料学会(ASTM)和联邦关于各种属性密封材料的规范。
This article will be used for construction of sealing materials, according to their joint deformation rate into small, medium and large categories, that is, they can withstand the maximum tensile and (or) compression during the entire use of ± 5%, ± 12% and ±25%. The Murphy’s law is introduced in this article. Using this law and the measured initial seam width, the maximum temperature gradient can be determined. We have divided the sealing materials of various properties into three categories. The emphasis is on making it possible for building personnel to use existing specifications to select materials. At the end of this paper, several tables are given to compare several parameters of various types of sealing materials. At the same time, they list the specifications of the American Institute of Testing and Materials (ASTM) and the Federation regarding various properties of sealing materials.