振动搅拌对再生砂粉混凝土性能的影响  

Effect of vibration mixing on properties of recycled sand powder concrete

作　　者：王建刚 虞晓婧 王海波 王鸣岐 李昱秀 曾波 WANG Jiangang;YU Xiaojing;WANG Haibo;WANG Mingqi;LI Yuxiu;ZENG Bo(Solid Waste R&D Center,Beijing Urban Green Source Environmental Protection Technology Co.,Ltd.,Beijing 102601,China)

机构地区：[1]北京都市绿源环保科技有限公司固废研发中心,北京102601

出　　处：《混凝土》2025年第1期134-137,147,共5页Concrete

基　　金：国家重点研发计划项目(2020YFC1909904)。

摘　　要：为了评价再生砂粉混凝土在振动搅拌作用下性能的变化规律及机理,选择4种水胶比分别采用普通强制搅拌和振动搅拌方式制备再生砂粉混凝土,对比研究混凝土工作性能、力学性能、耐久性能及微观性能变化规律。结果表明:与普通搅拌相比,振动搅拌可提升再生砂粉出机坍落度与扩展度,达到相同出机状态下可节省搅拌时间,同时提高抗压强度、动弹性模量及抗折强度,而对于C55及以上强度等级再生砂粉混凝土强度提升较小,此外可降低再生砂粉混凝土电通量6.2%~18.6%,显著提升其抗氯离子渗透性能。振动搅拌可细化孔隙结构,使再生砂粉混凝土变得更加密实,证实了振动搅拌对再生砂粉混凝土宏观性能提升的机理。To evaluate the changes in performance and mechanism of recycled sand powder concrete under vibration mixing,four water cement ratios were selected to prepare recycled sand powder concrete using ordinary forced mixing and vibration mixing methods,respectively.The working performance,mechanical performance,durability and microscopic performance of the concrete were compared and studied.The results show that compared with ordinary mixing,vibration mixing can improve the slump and expansion of recycled sand powder,saving mixing time at the same discharge state,and improving compressive strength,dynamic elastic modulus,and flexural strength.However,for C55 and above strength grade recycled sand powder concrete,the strength improvement is relatively small.In addition,it can reduce the electrical flux of recycled sand powder concrete from 6.2%to 18.6%,significantly improving its resistance to chloride ion penetration.Vibration mixing can refine the pore structure and make recycled sand powder concrete more dense,confirming the mechanism of improving the macroscopic performance of recycled sand powder concrete through vibration mixing.

关 键 词：振动搅拌 混凝土 再生砂粉 力学性能 耐久性能 微观性能 

分 类 号：TU063.2.01[建筑科学]