4.1 The true specific gravity of a material is the ratio of its true density, determined at a specific temperature, to the true density of water, determined at a specific temperature. Thus, the true specific gravity of a material is a primary property which is related to chemical and mineralogical composition.
4.2 This test method is particularly useful for hydratable materials which are not suitable for test with Test Method C135.
4.3 For refractory raw materials and products the true specific gravity is a useful value for: classification, detecting differences in chemical composition between supposedly like samples, indicating mineralogical phases or phase changes, calculating total porosity when the bulk density is known, and for any other test method that requires this value for the calculation of results.
4.4 This test method is a primary standard method which is suitable for use in specifications, quality control, and research and development. It can also serve as a referee test method in purchasing contracts or agreements.
4.5 Fundamental assumptions inherent in this test method are the following:
4.6 In interpreting the results of this test method it must be recognized that the specified sample particle size is significantly finer than specified for Test Method C135. Even this finer particle size for the sample does not preclude the presence of some closed pores, and the amount of residual closed pores may vary between materials or even between samples of the same or like materials. The values generated by this test method may, therefore, be very close approximations rather than accurate representations of true specific gravities. Thus, comparisons of results should only be judiciously made between like materials tested by this test method or with full recognition of potentially inherent differences between the material..........
方法原理:试样的颜色与标准铂-钴比色液的颜色目测比色。并以Hazen(铂-钴)颜色单位表示结果。2、密度的测定按GB/T 4472比重瓶法的规定进行。也可采用其他能满足分析要求的试验方法。在15℃~35℃的范围内,试样密度的温度校正系数为0.00093g /( cm3·℃)。比重瓶法为仲裁法。取两次平行测定结果的算术平均值为测定结果。两次平行测定结果之差值不大于0.0005 g/cm3。...
目前我国现有*标准和行业标准中如:GB/T533-A 、GB/T1033.1、GB/T6155、GB/T23561、YB/T5300、JB/T7984.3、GB/T 1713、GB/T8929、GB/T1713、GB/T208、GB/T5071、QB/T1010、GB/T9966、GB/T18856 、GB/T24203、GB/T8330、SL-237等标准均采用密度瓶(比重瓶)法。...
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