纸浆渣烧结灰基本特性及其在污泥固化中的试验研究  

An experimental study on basic properties of paper sludge ash and solidified sludge using paper sludge ash

作　　者：朱春鹏[1] 吴海清[2,3] 刘汉龙[2,3] 张波[4] 

机构地区：[1]常州大学岩土工程研究所,江苏常州213164 [2]河海大学岩土力学与工程教育部重点实验室,南京210098 [3]河海大学岩土工程科学研究所,南京210098 [4]南洋理工大学土木与环境工程系,新加坡639798

出　　处：《岩土力学》2012年第10期2979-2984,共6页Rock and Soil Mechanics

摘　　要：国内每年产生大量的污泥,其无害化处理、废物重新利用的技术是解决疏浚污泥污染问题的必由之路,而污泥固化技术是其重要的途径。纸浆渣烧结灰自身所具有的吸水性和自硬性是一种研制廉价污泥固化剂配方的重要成分,是把造纸产业废弃物和生产废弃物同时再利用的环保工法,具有现实的研究价值。对纸浆渣烧结灰基本特性进行了试验研究,并在此基础上进行了污泥固化的试验研究,主要包括纸浆渣烧结灰酸碱度试验、吸水率试验、微观结构试验、抗剪强度试验和污泥固化土的无侧限抗压强度试验,结果表明,纸浆渣烧结灰呈弱碱性;吸水性随着压力的增大而减小,存在一个最小吸水率;抗剪强度随含水率的增加而减小,且具有自硬性。纸浆渣烧结灰可提高水泥固化污泥的无侧限抗压强度,并且水泥的掺入含量越高,其强度的提高越显著。Large amounts of sludge are produced in China every year.Non-hazardous treatment and recycling technology is vital for industrial production to deal with sludge pollution problems,in which sludge solidification technology is of great importance.The hygroscopic and self-hardening properties of paper sludge ash are the beneficial to produce cost-effective sludge curing agent formulation.It is a worthwhile and environmental friendly to make use of wastes induced by paper production industries.The basic engineering properties of paper sludge ash have been studied in this study first.Furthermore sludge solidification tests have been carried out,including pH value,heavy metals in the extracting solution,hygroscopic property,microstructure and shear strength,and on the basis,the unconfined compression strength of solidified sludge using paper sludge ash.The results indicate： the paper sludge ash is weakly alkaline,the extracting heavy metals is of little pollution,hygroscopic property decreases with increasing pressure and there is a minimum water absorption;shear strength decreases with the water content increases;paper sludge ash can improve the unconfined compression strength of solidified sludge;and the shear strength increase obviously with higher cement content.

关 键 词：纸浆渣烧结灰 吸水率 抗剪强度 无侧限抗压强度 

分 类 号：TU441[建筑科学—岩土工程]