Influence of waste glass powder on printability and mechanical properties of 3D printing geopolymer concrete

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Developments in the Built Environment Pub Date : 2024-09-11 DOI:10.1016/j.dibe.2024.100541

Zhaoliang Sheng , Binrong Zhu , Jingming Cai , Jinsheng Han , Yamei Zhang , Jinlong Pan

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Abstract

Geopolymers represent a promising solution for reducing carbon emissions in 3D printing concrete (3DPC). This study explores the utilization of waste glass powder (WGP) as a novel precursor material to evaluate its influence on the printability and hardened mechanical properties of 3D printing geopolymer concrete based on slag and fly ash. Experimental results indicate that WGP content below 10% accelerates hydration and enhances buildability, whereas content exceeding 10% slows hydration but improves extrudability. Mechanical tests on cured specimens demonstrate a notable increase in compressive and flexural strength with increasing WGP content from 0% to 20%. Microstructural and chemical analyses of the 20% WGP variant reveal a denser morphology and an optimized Si/Al ratio.

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废玻璃粉对 3D 打印土工聚合物混凝土可打印性和机械性能的影响

土工聚合物是在三维打印混凝土（3DPC）中减少碳排放的一种前景广阔的解决方案。本研究探讨了如何利用废玻璃粉（WGP）作为新型前驱体材料，以评估其对基于矿渣和粉煤灰的 3D 打印土工聚合物混凝土的可打印性和硬化力学性能的影响。实验结果表明，WGP 含量低于 10%，会加速水化并提高施工性，而含量超过 10%，则会减缓水化速度，但会改善挤出性。对固化试样进行的力学测试表明，随着 WGP 含量从 0% 增加到 20%，抗压和抗折强度显著提高。对 WGP 含量为 20% 的变体进行的微观结构和化学分析显示，其形态更加致密，硅/铝比率也得到了优化。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.