Mix design and fresh properties for high-performance printing concrete
Mix design and fresh properties for high-performance printing concrete
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DOI：
10.1617/s11527-012-9828-z
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发表时间：
2012-08-01
影响因子：
3.8
通讯作者：
Thorpe, T.
中科院分区：
文献类型：
--
作者：
Le, T. T.;Austin, S. A.;Thorpe, T.
本文介绍了用于打印混凝土的高性能纤维增强细骨料混凝土的配合比设计和新鲜性能的实验结果。这种混凝土被设计为通过喷嘴挤出来构建逐层结构组件。打印工艺是一种新颖的数控增材制造方法，与传统的混凝土施工方法不同，它可以在没有模板的情况下建造建筑和结构部件。最关键的新鲜性能是可挤出性和可成型性，它们与可加工性和开放时间相互关联。这些性能受到混合比例以及超增塑剂、缓凝剂、促进剂和聚丙烯纤维的存在的显着影响。通过全面制造工作台组件来确定和验证最佳组合。
This paper presents the experimental results concerning the mix design and fresh properties of a high-performance fibre-reinforced fine-aggregate concrete for printing concrete. This concrete has been designed to be extruded through a nozzle to build layer-by-layer structural components. The printing process is a novel digitally controlled additive manufacturing method which can build architectural and structural components without formwork, unlike conventional concrete construction methods. The most critical fresh properties are shown to be extrudability and buildability, which have mutual relationships with workability and open time. These properties are significantly influenced by the mix proportions and the presence of superplasticiser, retarder, accelerator and polypropylene fibres. An optimum mix is identified and validated by the full-scale manufacture of a bench component.