水泥穩定碎石一立方的質量取決于配合比和集料的具體類型。根據提供的信息，5%水泥穩定碎石的質量大致如下：

　　The quality of one cubic meter of cement stabilized crushed stone depends on the mix proportion and the specific type of aggregate. According to the provided information, the quality of 5% cement stabilized crushed stone is roughly as follows:

　　水泥：集料 = 5:100，即水泥為集料質量的5%。

　　Cement: Aggregate=5:100, which means cement accounts for 5% of the aggregate mass.

　　水泥穩定碎石的質量范圍大致在2.1到2.5噸每立方米之間。

　　The quality range of cement stabilized crushed stone is roughly between 2.1 and 2.5 tons per cubic meter.

　　因此，對于5%水泥穩定碎石，一立方的質量大約在2.4噸左右。這個數值是一個近似值，實際的質量可能會根據具體的配合比、集料種類和顆粒級配有所變化。

　　Therefore, for 5% cement stabilized crushed stone, the mass of one cubic meter is approximately 2.4 tons. This value is an approximate value, and the actual quality may vary depending on the specific mix proportion, aggregate type, and particle size distribution.

　　如果您需要更精確的計算，請提供具體的配合比和集料信息，以便進行更準確的計算

　　If you need more accurate calculations, please provide specific mix proportions and aggregate information for more accurate calculations

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