The Controlling of Settlement-Area Ratio for Tank Base Failure;
控制油罐地基失效的沉降面积比
： The strength and the permeability of the cigarette paper depends largely on the quality of the Precipitated calcium carbonatePCC especially on the crystal type the size and the size distribution of the PCC particles．The settling volume represents to a great extent though not strictly the characteristics of the particle size and the size distribution of the PCC
卷烟纸用沉淀碳酸钙（PCC）的品种特别是晶型、粒度与粒度分布对卷烟纸的强度、透气度有较大的影响；沉降体积指标反映了PCC粒度的大小趋势，但该指标数据显示与实际情况有差距。
Differences in the particle morphology of calcium carbonate produced by different enterprises were compared through SEM,and the differenccs were characterized by settling volume and oil absorption.
通过SEM比较了不同厂家的碳酸钙颗粒形态的差异,并通过沉降体积和吸油量来表征其差异,进一步分析了轻质碳酸钙沉降体积对PVC试样力学性能的影响。
Then the modifier amount can be regarded as the best dosage that is confirmed by settling volume in liquid paraffin and the modified mechanism is given in the end of the paper.
然后通过在液体石蜡中的沉降体积验证了此改性剂用量可以作为最佳剂量,最后给出了偶联剂的改性机理。