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热胀冷缩是建筑材料的一个重要物理性能,通常用线膨胀系数α这一指标来衡量其热胀冷缩值的大小。一、什么是线膨胀系数国家标准GB/T50083—97《建筑结构设计术语和符号标准》中规定,线膨胀系数是表示材料在规定的温度范围内以规定常温下的长度为基准,随温度增高后的伸长率和温度增量的比值,以1/℃或1/K表示。常用建筑材料的线膨胀系数α值见表1。
Thermal expansion and contraction is an important physical properties of building materials, usually the coefficient of linear expansion coefficient α to measure the size of its thermal expansion and contraction value. First, what is the national standard linear expansion coefficient GB / T50083-97 “building structure design terms and symbol standards” provides that the linear expansion coefficient is the material in the specified temperature range to the provisions of the length of the room temperature as a benchmark, with the temperature increase After the ratio of elongation and temperature increment, 1 / ℃ or 1 / K said. Common building materials, linear expansion coefficient α value in Table 1.