Mechanical properties and deformation behaviour of early age concrete in the context of digital construction
Mechanical properties and deformation behaviour of early age concrete in the context of digital construction
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DOI：
10.1016/j.compositesb.2019.02.040
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发表时间：
2019-05-15
影响因子：
13.1
通讯作者：
Tan, Ming Jen
中科院分区：
文献类型：
--
作者：
Panda, Biranchi;Lim, Jian Hui;Tan, Ming Jen
数字化建筑正逐渐为建筑和混凝土行业开启无限可能。除了开发新的测量和控制技术外，坚固打印过程的关键秘密还在于我们对加工技术和材料新鲜特性的理解。本文旨在更好地了解3D可打印材料的早期力学性能，并根据大规模混凝土打印的要求对其进行改进。应用三维光学测量技术对新鲜粉煤灰水泥砂浆的生坯强度和刚度进行了试验研究。抗压生坯强度与材料屈服强度演变有关，随后用纳米粘土进行改性以获得更高的可建性。由于杨氏模量的显著增加，纳米粘土的加入降低了层的变形，为了估计这种不受控制的变形，我们制定了一个数学函数，随后通过与印刷实验的比较验证了这个函数。
Digital construction is gradually opening unlimited possibilities for building and concrete industry. The key secret for a robust print process lies in our understanding of the processing technology and material fresh properties, in addition to developing novel measurement and control techniques. This paper aims to gain a better understanding of early age mechanical properties of 3D printable materials and improve it for the requirement of large scale concrete printing. Experimental investigations were carried out to measure green strength and stiffness of fresh fly ash-cement mortar with applied 3D optical metrology. The compressive green strength was linked with material yield strength evolution and later, modified with nanoclay for higher buildability properties. Nanoclay addition deceased the layer deformation due to significant increase in Young's modulus and to estimate this uncontrolled deformation, a mathematical function was formulated, which subsequently validated by comparison to printing experiments.