介绍了新版落锤撕裂试验(DWTT)标准GB/T8363—2007《铁素体钢落锤撕裂试验方法》,并与以前的版本GB/T8363—1987以及API RP5L3—1996《管线管落锤撕裂试验推荐作法》进行了比较。对比表明,新版国家标准GB/T8363—2007在GB/T8363—1987...介绍了新版落锤撕裂试验(DWTT)标准GB/T8363—2007《铁素体钢落锤撕裂试验方法》,并与以前的版本GB/T8363—1987以及API RP5L3—1996《管线管落锤撕裂试验推荐作法》进行了比较。对比表明,新版国家标准GB/T8363—2007在GB/T8363—1987的基础上进行了修改,并兼顾了API RP 5L3—1996,另外还增加了异常断口评定等新内容。展开更多
Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory en...Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory engineering classification methods were discussed and analyzed from the aspects of the definition in particle fraction, classification of soil type and evaluation standard for soil gradation. There is a same limit of fine grains fraction in the two standards, and there are three main types of soil in GB/T 50145-2007 and two in ASTM D-2487. Different evaluation standards of gradation are put forward for gravels and sands in ASTM D-2487. Same criteria of A line, B line and controlling value of plastic index are in the plasticity chart of both standards.展开更多
文摘介绍了新版落锤撕裂试验(DWTT)标准GB/T8363—2007《铁素体钢落锤撕裂试验方法》,并与以前的版本GB/T8363—1987以及API RP5L3—1996《管线管落锤撕裂试验推荐作法》进行了比较。对比表明,新版国家标准GB/T8363—2007在GB/T8363—1987的基础上进行了修改,并兼顾了API RP 5L3—1996,另外还增加了异常断口评定等新内容。
基金Supported by Projects of National Natural Science Foundation of China ( Nos. 40902077,41111120084,41172236)
文摘Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory engineering classification methods were discussed and analyzed from the aspects of the definition in particle fraction, classification of soil type and evaluation standard for soil gradation. There is a same limit of fine grains fraction in the two standards, and there are three main types of soil in GB/T 50145-2007 and two in ASTM D-2487. Different evaluation standards of gradation are put forward for gravels and sands in ASTM D-2487. Same criteria of A line, B line and controlling value of plastic index are in the plasticity chart of both standards.
