填充体质量控制的目标是：填充体具有一定强度、充填材料成本低、流动性好、不脱水或少量脱水。
The quality control aims to make backfill body meet its strength requirements and allow backfill material to have a low lost and a good fluidity and dehydrate a little or not.
尽管MF R值是在低剪切速率下测定，与事实不符，但是可以从中准确地区分出不同材料相对流动性的好坏。
Even though MFR values are measured at an unrealistically low shear rate, it might seem that the test would accurately rank different materials for comparative ease of flow.
MF R采用的数值是在一定的条件下通过口模的聚合物熔体的重量，所以MF R越大，熔体粘度越低，而材料的流动性就越好。
The quoted MFR value is the weight of polymer melt flowing through an orifice in specified conditions, so the higher the MFR value, the lower the melt viscosity and the easier the material will flow.
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