流变改性材料在超高桥塔高强混凝土中的应用  

Application of rheology-modified materials in high strength concrete for bridge tower

作　　者：张庆芸 周新文 林玮 徐文[4] 魏乐永[5] 颜智法 梁振有 关健 ZHANG Qingyun;ZHOU Xinwen;LIN Wei;XU Wen;WEI Leyong;YAN Zhifa;LIANG Zhenyou;GUAN Jian(Jiangsu Province Transportation Engineering Construction Bureau,Nanjing 210004,China;Jiangsu Sobute New Materials Co.Ltd.,Nanjing 211103,China;State Key Laboratory of High Performance Civil Engineering Materials,Nanjing 210008,China;School of Materials Science and Engineering,Southeast University,Nanjing 211189,China;CCCC Highway Consultants Co.Ltd.,Beijing 100088,China)

机构地区：[1]江苏省交通工程建设局,江苏南京210004 [2]江苏苏博特新材料股份有限公司,江苏南京211103 [3]高性能土木工程材料国家重点实验室,江苏南京210008 [4]东南大学材料科学与工程学院,江苏南京211189 [5]中交公路规划设计院有限公司,北京100088

出　　处：《新型建筑材料》2021年第12期41-46,共6页New Building Materials

基　　金：江苏省交通工程建设局研究计划项目(ZG-KT-3-7-2-DG)。

摘　　要：应用流变改性材料制备超高桥塔用高强混凝土,研究了流变改性材料掺量对新拌砂浆流动度与流变性能的影响规律,试验探究了流变改性材料对混凝土工作性能和力学性能的影响。结果表明:掺加流变改性材料能提高新拌砂浆的流动度,尤其可显著降低其塑性黏度;能增大混凝土坍落度,缩短倒筒时间,有效提高混凝土2 h经时工作性保持能力,同时可降低混凝土塑性黏度,提高混凝土泵送性;适量掺加流变改性材料对混凝土的力学性能基本无影响。In this paper,rheology-modified materials are used to prepare high strength concrete for bridge tower.The influence of rheology-modified materials on the fluidity and rheological properties of fresh mortar is studied.And the influence of rheology-modified materials on the workability and mechanical properties of concrete is explored.The results show that the fluidity of fresh mortar can be improved,especially the plastic viscosity can be significantly reduced by adding rheology-modified materials.And,the rheology-modified materials can effectively improve the workability of concrete after 2 h resting,improve the slump of concrete and reduce the pouring time.The addition of rheology-modified materials decrease the plastic viscosity of concrete,and improve its pumpability.The mechanical properties of concrete are not affected by the addition of rheology-modified materials.

关 键 词：流变改性材料 泵送性 高强混凝土 流动性能 

分 类 号：TU528.042[建筑科学—建筑技术科学]