SCOPE This Standard sets out the method for determining the compactibility index, for concrete, where the expected slump is less than 10 mm and the nominal size of aggregate does not exceed 40 mm.

范围本标准对混凝土压塑性指数的测定方法(在预计的坍落度小于10 mm，并且骨料的标称粒径不超过40 mm的情况下)作出了规定。

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The reference standard, of convenient length, shall be prepared from a length of bar or tube of the same nominal outside diameter, material and heat-treatment as the material examined.

对比试块应从与待检材料有相同的公称外径、材质和热处理状态的棒或管上制取。

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What I do know is that for the limited data set I have, the CRB index produced a nominal compound return of 0.77%, a real return of minus 2.16%, a standard deviation that is twice that of Treasuries, had a twelve month period with a loss of 48.74% and had a 27 year period with a negative compound return.

FORBES: Gold's Twelve Month March To $3,800