水下不分散混凝土拌和物浆体流变性能试验研究  

Experimental Study on Rheological Properties of Slurry in Underwater Non-Dispersible Concrete

作　　者：李晓克 王琳[1,3] 耿海彬 丁新新 杜浩 李长永 LI Xiaoke;WANG Lin;GENG Haibin;DING Xinxin;DU Hao;LI Changyong(International Joint Research Lab for Eco-Building Materials and Engineering of Henan,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Collaborative Innovation Center for Efficient Utilization of Water Resources,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;School of Civil Engineering and Communications,North China University of Water Resources and Electric Power,Zhengzhou 450045,China)

机构地区：[1]华北水利水电大学河南省生态建材工程国际联合实验室,河南郑州450045 [2]华北水利水电大学黄河流域水资源高效利用省部共建协同创新中心,河南郑州450046 [3]华北水利水电大学土木与交通学院,河南郑州450045

出　　处：《人民黄河》2025年第4期157-160,共4页Yellow River

基　　金：国家自然科学基金青年项目(52108212)。

摘　　要：通过试验研究了UWB-Ⅱ型絮凝剂和聚羧酸高性能减水剂掺量对水下不分散混凝土拌和物浆体的流动度和流变性能的影响,分析了浆体流动度与屈服应力的关系。结果表明:小掺量絮凝剂可以增大浆体的流动度,减小其屈服应力、黏稠度;大掺量絮凝剂则显著增大浆体的屈服应力和黏稠度。减水剂的加入可以小幅增大浆体流动度,减小浆体屈服应力和黏稠度,但其掺量较大时对浆体屈服应力、黏稠度的影响减弱。絮凝剂掺量较小时浆体表现为剪切变稠、较大时浆体表现为剪切变稀,减水剂的加入对浆体剪切变稀现象影响不显著。流动度与屈服应力为线性负相关关系。The effects of UWB-Ⅱflocculant and polycarboxylic acid superplasticizer on the fluidity and rheological properties of the slurry in underwater non-dispersible concrete were studied.The relationship between the fluidity and yield stress of the slurry was analyzed.The results show that a small amount of flocculant can increase the fluidity of slurry and reduce the yield stress and viscosity of slurry.The yield stress and viscosity of slurry are significantly increased with large dosage of flocculant.The addition of water reducing agent can slightly increase the fluidity of the slurry and reduce the yield stress and viscosity of the slurry,but the influence to the yield stress and viscosity of the slurry is weakened when the addition of water reducing agent is larger.When the dosage of flocculant is small,the slurry shows shear thickening,and when the dosage of flocculant is large,the slurry shows shear thinning.The addition of water reducing agent has no significant effect on the slurry shear thinning.There is a linear negative correlation between fluidity and yield stress.

关 键 词：水下不分散混凝土 浆体 絮凝剂 减水剂 流动度 流变性能 

分 类 号：TV431[水利工程—水工结构工程] TU528[建筑科学—建筑技术科学]