Mechanical performance of extrusion-based two-part 3D-printed geopolymer concrete: A review of advances in laboratory and real-scale construction projects

IF 7.9 3区 材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Mustapha B. Jaji, Adewumi J. Babafemi, Gideon P.A.G. van Zijl
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引用次数: 0

Abstract

3D printing of geopolymer is considered an alternative to cement-based concrete due to its sustainability and novel manufacturing techniques. Comparisons have been drawn between one-part and two-part 3D-printed geopolymer concrete (OP3DPGPC and TP3DPGPC, respectively). Some articles have projected OP3DPGPC to be user-friendly since it is excited with powdered activators. However, the embodied energy and the carbon emissions of liquid silicate reactants in TP3DPGPC are 70 % and 50 %, respectively, less than the solid silicate used in OP3DPGPC. Also, studies show that TP3DPGPC exhibits superior mechanical performance compared to OP3DPGPC. This study comprehensively reviews the advances in the laboratory-scale and real-scale development of extrusion-based TP3DPGPC, their material composition, constituents’ proportion, and mechanical performance. Data were collected from articles published on TP3DPGPC across renowned journals from 2017 to 2024 and internet sources to identify real-scale TP3DPGPC structures. The mechanical properties of TP3DPGPC available in the literature include compression, flexure, interlayer bond, tensile bond, direct tensile, and splitting tensile strength. These studies show that the mechanical performance of TP3DPGPC depends on the type and proportion of precursor(s), type and composition of the reactants, aggregate type, aggregate-to-binder ratio, activator-to-binder ratio, the molarity of NaOH, SiO2/Na2O ratio, water-to-binder ratio, water-to-solid ratio, liquid-to-solid ratio, additive types, fibre (type, content, and aspect ratio), and curing (type and conditions). Similarly, the mechanical performance of TP3DPGPC is dependent on the printer parameters, the configuration, and the loading direction. The data generated will serve as the basis for future studies and the prediction of mechanical performance. Finally, a review of the microstructure properties is conducted to justify the mechanical performance.
基于挤压的两部分3d打印地聚合物混凝土的力学性能:实验室和实际规模建筑工程的进展综述
由于其可持续性和新颖的制造技术,3D打印地聚合物被认为是水泥基混凝土的替代品。对单组分和双组分3d打印地聚合物混凝土(分别为OP3DPGPC和TP3DPGPC)进行了比较。一些文章预测OP3DPGPC是用户友好的,因为它是用粉末状活化剂激发的。然而,TP3DPGPC中液态硅酸盐反应物的蕴含能量和碳排放量分别比OP3DPGPC中使用的固体硅酸盐反应物少70%和50%。研究还表明,TP3DPGPC的力学性能优于OP3DPGPC。本文综述了挤压基TP3DPGPC的实验室规模和实际规模的研究进展,及其材料组成、组分比例和力学性能。数据收集了2017 - 2024年在知名期刊和互联网上发表的TP3DPGPC论文,以识别真实规模的TP3DPGPC结构。文献中已知的TP3DPGPC的力学性能包括压缩、挠曲、层间键合、拉伸键合、直接拉伸和劈裂拉伸强度。研究表明,TP3DPGPC的力学性能取决于前驱体的种类和比例、反应物的种类和组成、集料的种类、集料-粘结剂比、活化剂-粘结剂比、NaOH的摩尔浓度、SiO2/Na2O比、水-粘结剂比、水-固比、液-固比、添加剂种类、纤维(种类、含量和长径比)和固化(种类和条件)。同样,TP3DPGPC的机械性能取决于打印机参数、配置和加载方向。所产生的数据将作为未来研究和机械性能预测的基础。最后,对复合材料的微观结构性能进行了分析,验证了复合材料的力学性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
5.80
自引率
6.40%
发文量
174
审稿时长
32 days
期刊介绍: Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science. With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.
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