硅酸盐通报2026，Vol.45Issue(8)：2699-2710,12.DOI:10.16552/j.cnki.issn1001-1625.2026.0014
混搅挤一体化快速3D打印实现速凝混凝土可连续建造的验证
Verification of Integrated Mixing-Stirring-Extrusion Rapid 3D Printing Achieve Continuous Construction of Rapid-Setting Concrete
摘要
Abstract
To address the conflict between the open time and setting time of rapid-setting cementitious materials caused by the"mix-then-convey process"in concrete 3D printing,as well as the consequent failure to meet the continuous construction requirements of building structures,this study adopted an independently developed integrated mixing-stirring-extrusion 3D printing device for rapid-setting concrete.With the innovative design of dual-pipeline separate delivery of dry materials and liquid,plus in-nozzle instant mixing,stirring and extrusion,this technical bottleneck was overcome.Taking rapid-setting magnesium phosphate cement(MPC)mortar as the printing material,this study systematically investigates the evolution law of the number of setting layers of printed components over time,as well as the dynamic matching relationship between the compressive strength of materials at the setting-unset interface(setting line)and the total self-weight stress of unset layers,so as to verify the feasibility of continuous construction of rapid-setting materials using this integrated process.The results show that there are always 4 to 7 unset layers above the set layers of MPC mortar printed components,and the number of unset layers gradually decreases with the progress of printing.The compressive strength of the printed layers at the setting line is always 25.6 times or more of the total self-weight stress of the unset layers,and the strength development rate was 26.7 times or more of the self-weight stress development rate of the unset layers.This indicates that the bottom set layers can continuously support the self-weight of the upper unset layers,confirming that the integrated mixing-stirring-extrusion 3D printing process enables rapid and continuous construction of MPC mortar.The research findings provide a reference for improving the 3D printing efficiency of rapid-setting cementitious materials and optimizing the printing process.关键词
混搅挤一体化快速3D打印/磷酸镁水泥砂浆/连续建造/抗压强度/自重应力Key words
integrated mixing-stirring-extrusion rapid 3D printing/magnesium phosphate cement mortar/continuous construction/compressive strength/self-weight stress分类
建筑与水利引用本文复制引用
李维红,邓永杰,王朝英,钟建军,吕立博,麻海燕,余红发,李栋伟..混搅挤一体化快速3D打印实现速凝混凝土可连续建造的验证[J].硅酸盐通报,2026,45(8):2699-2710,12.基金项目
辽宁省兴辽英才计划领军人才项目(XLYC2402027) （XLYC2402027）
大连大学学科建设专项(DLUXK-2025-FX-005) （DLUXK-2025-FX-005）
大连市重点科技研发项目(2023YF23WZ045) （2023YF23WZ045）
