CaO添加顺序对废弃泥浆絮凝效果的影响

Influence of Addition Order of CaO on Flocculation Effect of Waste Slurry

针对温州某钻孔灌注桩废弃泥浆进行了沉降柱试验和颗粒分析实验,研究有机絮凝剂APAM以及无机絮凝剂CaO对泥浆沉降性能和颗粒粒径的影响,着重探究了无机絮凝剂CaO的不同添加顺序对有机絮凝剂APAM絮凝效果的影响。结果表明:在较少APAM添加量(10mL)下后添加CaO能增大泥浆的初始沉降量;先添加CaO再添加APAM,不利于APAM絮凝作用的发挥;后添加CaO的情况下,CaO对于最终的絮体粒径的影响主要取决于絮体本身的强度及搅拌强度。

The sedimentation column tests and particle analysis experiments are performed on the waste slurry of a bored pile in Wenzhou to study the influence of organic flocculant APAM and inorganic flocculant CaO on the mud settling property and particle size.The influence of different addition order of inorganic flocculant CaO on the flocculation effect of organic flocculant APAM are focused on.The results show that：on the basis of less APAM addition（10 mL）,CaO adding can increase the mud initial sedimentation amount;adding CaO then adding APAM is not conductive to APAM flocculation;in case of adding CaO later,the effect of CaO on the final flocs particle size mainly depends on the strength of the floc itself and the stirring intensity.