| 摘要: |
| 为了研究影响聚合物颗粒在水泥表面吸附行为的因素，测试了掺乳液前后新拌浆体zeta电位随时间的变化，并研究了乳液类型及聚灰比(mL/mC)对水泥粒子吸附乳液中聚合物颗粒(简称乳液颗粒)的影响.结果表明：水泥粒子会吸附乳液颗粒，阴离子型乳液颗粒较非离子型乳液颗粒更易被水泥粒子吸附；随聚灰比的增加，水泥粒子对乳液颗粒的吸附量有一个最大值，且乳液颗粒在水泥表面的吸附是单层的. |
| 关键词: 聚合物改性水泥浆 zeta电位 吸附 乳液类型 聚灰比 |
| DOI：10.3969/j.issn.1007 9629.2013.05.001 |
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| Factors Influencing the Adsorption Behavior of Latex Polymer onCement: Latex Type and Polymer/Cement Ratio |
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ZHONG Shi yun, LI Jin mei, HAN Dong dong, NI Kun
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Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University,Shanghai 201804, China
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| Abstract: |
| In order to investigate the factors influencing the adsorption behavior of polymer particles on cement grains, the zeta potentials of fresh plain cement paste(PCP) and latex modified cement pastes(LMCP) were measured and the influences of latex type and the latex to cement ratio (mL/mC) on the adsorption behavior of polymer particles in the latex (for short as latex particles) on the cement grain were investigated. The results show that cement grains can adsorb latex particles, moreover, anionic latex particles are more easily adsorbed by cement grains than nonionic ones. With the increase of mL/mC the adsorbed latex particles on the cement grains increase to a constant level, therefore it can be concluded that the adsorption is single layered. |
| Key words: polymer modified cement paste zeta potential adsorption latex type latex to cement ratio |
