论文部分内容阅读
1新旧规范的区别旧规范规定：混凝土标号应由按标准方法制作养护的边长为200mm的立方体试件，在28天龄期用标准试验方法测得的抗压极限强度。新规范规定：混凝土强度等级应由标准方法制作养护的边长为150mm的立方体试件，在28天龄期用标准试验方法测得的具有95％保证率的抗压强
The difference between the old and new specifications The old code states: Concrete label shall be made by the standard method of curing the cube 200mm side of the specimen, 28 days of age by standard test method to determine the ultimate compressive strength. The new code stipulates that the concrete strength grade shall be made by the standard method of curing a cubic specimen with a side length of 150 mm and a compressive strength of 95% guaranteed by a standard test method at 28 days of age