What is the required scale accuracy for material passing the 2.00mm (No.10) sieve according to ASTM D422?

The correct answer relates specifically to the precision required when weighing materials that pass through the 2.00 mm (No. 10) sieve as specified in ASTM D422. ASTM D422 outlines the procedures for particle size analysis of soils, including the requirement for scale accuracy.

For materials passing the No. 10 sieve, it is essential that the measurement of these smaller particles is precise to ensure that the analysis of the gradation of the material is accurate. A scale accuracy of 0.01 g means that the scale can measure to the hundredths place, allowing for more precise determination of the mass of fine materials which can significantly affect the results of the test.

Using a scale with this level of accuracy helps in maintaining the standards needed for tests related to soil materials, which can influence construction specifications and material quality. If the scale were less accurate, the data collected might yield less reliable results, leading to potential discrepancies in the classification or suitability of materials for construction purposes.