东南大学学报（自然科学版）2016，Vol.46Issue(z1)：20-24,5.DOI:10.3969/j.issn.1001-0505.2016.S1.004
固化污泥固结渗透特性及孔隙变化试验研究
Experimental study on consolidation-permeability properties and pore size variation during consolidation
摘要
Abstract
To investigate the variation of permeability during finite strain consolidation,the sewage sludge was solidified by Portland cement ( OPC) and sulphate aluminium cement ( SAC) with a cu-ring time of 14 d. The consolidation-permeability tests were performed to evaluate the behaviors of compression and hydraulic conductivity during consolidation. The pore size variation under different consolidation pressures was tested by centrifuge tests. The result shows that the solidified sludge is high compressive soil due to the fact that the coefficient of compression (av) is up to 1 MPa-1. av decreases by two orders of magnitude in the consolidation pressure range of 0—800 kPa. av and the permeability shows nonlinear relationship with the consolidation pressure. And the hydraulic conduc-tivity is not suitable to be considered as a constant in calculation. During consolidation process,the proportion of macropores and mesopores decreases and micropores increases to 50% of the total pore space.关键词
污泥/固化/压缩/渗透/孔隙结构Key words
sewage sludge/solidification/compression/permeability/pore size分类
建筑与水利引用本文复制引用
范惜辉,朱伟,王升位,徐浩青,舒实..固化污泥固结渗透特性及孔隙变化试验研究[J].东南大学学报（自然科学版）,2016,46(z1):20-24,5.基金项目
国家重点基础研究发展计划(973计划)资助项目(2012CB719804)、国家科技重大专项资助项目(2012ZX07103005,2013ZX07113001)、科技基础设施建设计划资助项目(BM2013013)、中央高校基本科研业务费专项资助项目(2015B35614)、江苏省普通高校研究生科研创新计划资助项目(KYZZ_0142) （973计划）
