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破乳行为对CA浆体流变性能的影响及机理
Effect of Demulsification Behavior of Emulsified Asphalt on Rheological Properties in CA Paste and Its Mechanism
投稿时间:2016-04-23  修订日期:2016-05-13
DOI:103969/j.issn.1007 9629201704010
中文关键词:  CA砂浆  聚沉  破乳  流变性能  机理
英文关键词:CA mortar  coagulation  demulsification  rheological property  mechanism
基金项目:国家自然科学基金资助项目(51278231);江苏省自然科学基金资助项目(BK2012867)
        
作者单位
朱晓斌
ZHU Xiaobin
江苏苏博特新材料股份有限公司,江苏南京211103
Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
洪锦祥
HONG Jinxiang
江苏苏博特新材料股份有限公司,江苏南京211103
Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
李炜
LI Wei
东南大学材料科学与工程学院,江苏南京211189
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
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中文摘要:
      采用模拟溶液研究了阴离子乳化沥青在盐溶液中的粒径分布波动及聚沉情况.通过CaCl2溶液和螯合剂调控CA浆体中乳化沥青的破乳程度,研究了破乳行为对CA浆体流变性能的影响.结果表明:CA浆体中的阳离子对阴离子乳化沥青的聚沉破乳具有明显促进作用,阳离子价态越高、浓度越大、混合时间越长,阴离子乳化沥青聚沉破乳就越剧烈;水泥水化释放的阳离子促使阴离子乳化沥青聚沉破乳,增加了CA浆体流变时浆体的内摩擦,从而使CA浆体流变性能下降.
英文摘要:
      To reveal the demulsification behavior and mechanism of emulsified asphalt in CA mortar, the particle size distribution fluctuation and coagulation of anionic emulsified asphalt in the salt solution were investigated. The demulsification degree was controlled by adding CaCl2 and chelating agent, and the demulsification behavior of anion emulsified asphalt on rheological properties of CA paste were investigated. The results indicate that for the anionic emulsified asphalt clustering into demulsification in the salt solution the greater the cation valence state, the higher the cation concentration; the longer the mixing time, the more intense the anionic emulsified asphalt coagulation was. The cation released with cement hydration prompted the coagulation demulsification of anionic emulsified asphalt, which increased the internal friction of CA paste in viscous deformation, resulting in the loss the rheological property of CA paste.
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