Third RILEM International Conference on Concrete and Digital Fabrication - Digital Concrete 2022
Third RILEM International Conference on Concrete and Digital Fabrication - Digital Concrete 2022
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第三届 RILEM 国际混凝土和数字化制造会议 - Digital Concrete 2022
DOI：
10.1007/978-3-031-06116-5_68
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Kolawole J
中科院分区：
文献类型：
--
作者：
Kolawole J
3D混凝土打印对材料的要求主要集中在可打印性和可构造性。混凝土必须是可泵送、可挤压的，但在挤压后仍保持其形状(新鲜状态)，并相互堆叠而不发生屈服和屈曲破坏(塑性状态)。3D打印混凝土材料的性质推动了采用各种测试方法来评估这些要求的研究。本研究报告了3DCP在新鲜和塑性状态下评估的试验方法--流变法、无侧限压缩试验、重力驱动(段塞)试验和缓慢渗透试验。这项研究进一步强调了两种主要的可打印材料--增强型触变混凝土和加速水化混凝土--的相关性、应用和实用性。
Materials’ requirements for 3D concrete printing centre around printability and buildability. The concrete must be pumpable, extrudable, yet retain its shape after extrusion (fresh state) and stack over each other without yielding and buckling failure (plastic state). The nature of 3D printed concrete materials has driven research into adapting various test methods to assess these requirements. This study reports selected test methods evaluated for 3DCP in its fresh and plastic state – rheometry, unconfined compression tests, gravity-driven (slug) tests and slow penetration tests. The study further highlights their correlations, applications, and practicality for the two main types of printable materials – enhanced-thixotropic and accelerated-hydration concrete.