摘要
采用Mini-Mason法制备了一种高粗骨料体积分数的骨料嵌锁良好的正混凝土.结果表明:通过提高填充砂浆的流动性,能有效提升混凝土中粗骨料的体积分数至52%,并明显改善混凝土的力学性能、体积稳定性、传质性能和界面过渡区的结构,优化浆体与粗骨料的黏结状态,大幅度降低胶凝材料的用量.试验证明了Mini-Mason工艺的可行性,并为3D打印正混凝土提供了一种新的技术优势.
A orthoconcrete with high coarse aggregate volume fraction and good aggregate interlock was prepared by Mini-Mason method.The results show that by improving the fluidity of the filling mortar,the volume fraction of coarse aggregate in concrete can be effectively increased to 52%,and the mechanical properties,volume stability,mass transfer performance and interfacial transition zone structure of concrete can be significantly improved,and the bonding state between slurry and coarse aggregate can be optimized,and the use amount of cementing material can be greatly reduced.The experiment proves the feasibility of the Mini-Mason process and provides a new technical advantage for 3D printing orthoconcrete.
作者
张文贵
沈卫国
刘超
王亚楠
吴鹏
ZHANG Wengui;SHEN Weiguo;LIU Chao;WANG Yanan;WU Peng(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology,Wuhan 430070,China;WUT‑UC Berkeley Joint Laboratory on Concrete Science and Technology,Wuhan 430070,China;Xiangyang Key Laboratory of Comprehensive Utilization of Bulk Solid Waste and Green Building Materials,Xiangyang 441100,China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2023年第9期980-987,共8页
Journal of Building Materials
基金
国家自然科学基金资助项目(51972247)。
关键词
抛填骨料
粗骨料体积分数
骨料嵌锁
正混凝土
界面过渡区
scattering‑filling aggregate
volume fraction of coarse aggregate
aggregate interlock
orthoconcrete
interfacial transition zone
