3D printed concrete has attracted much attention in recent years,and 3D printed concrete has also developed rapidly.However,currently,most 3D printed mixtures only have fine aggregates,with a maximum size of only 4mm.Due to the lack of coarse aggregate and high cement content in the mixture,the cost of concrete increases,reducing the utilization of solid waste,and resulting in high resource consumption,resulting in a huge environmental burden.3D printing of coarse aggregate concrete not only reduces cement consumption and carbon emissions,reduces construction costs,but also recycles solid waste from construction.In addition,increasing the amount of coarse aggregate can also significantly reduce the hydration heat shrinkage of concrete and improve its volume stability.It analyzes the effects of adding coarse aggregate on its printability,rheological properties,extrudability,constructability,mechanical anisotropy,durability introduces the construction application of 3D printed coarse aggregate.
关键词
3D打印粗骨料混凝土/流变性/力学各向异性/耐久性/建造应用
Key words
3D pringted coarse aggregate concrete/rheological properties/mechanical anisotropy/durability/construction applications
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