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用于3D打印的羟丙基甲基纤维素改性硫铝酸盐水泥的可行性研究

A Feasibility Study on HPMC-Improved Sulphoaluminate Cement for 3D Printing.

作者信息

Ding Zhu, Wang Xiaodong, Sanjayan Jay, Zou Patrick X W, Ding Zhi-Kun

机构信息

Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen 518060, China.

Center for Sustainable Infrastructure, School of Engineering, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne 3122, Victoria, Australia.

出版信息

Materials (Basel). 2018 Nov 29;11(12):2415. doi: 10.3390/ma11122415.

DOI:10.3390/ma11122415
PMID:30501070
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6316929/
Abstract

A novel 3D printing material based on hydroxypropyl methylcellulose (HPMC)-improved sulphoaluminate cement (SAC) for rapid 3D construction printing application is reported. The hydration heat, setting time, fluidity of paste and mortar, shape retainability, and compressive strength of extruded SAC mortar were investigated. HPMC dosage, water-to-cement (W/C) ratio, and sand-to-cement (S/C) ratio were studied as the experimental parameters. Hydration heat results reveal HPMC could delay the hydration of SAC. The initial and final setting time measured using Vicat needle would be shortened in the case of W/C ratio of 0.3 and 0.35 with HPMC dosage from 0.5% to 1.5%, W/C ratio of 0.40 with HPMC dosage of 0.5%, 0.75%, and 1.5%, and W/C ratio of 0.45 with HPMC dosage of 0.45, or be extended in the case of W/C ratio of 0.4 with HPMC dosage of 1.0% and W/C ratio of 0.45 with HPMC dosage from 0.75% to 1.5%. Fluidity measurement shows HPMC significantly improves the shape retainability. Furthermore, the addition of HPMC remarkably increased the compressive strength of extruded mortar. The results showed that HPMC could be used to prepare 3D printing SAC having satisfactory shape retainability, setting time and compressive strength.

摘要

报道了一种基于羟丙基甲基纤维素（HPMC）改性硫铝酸盐水泥（SAC）的新型3D打印材料，用于快速3D建筑打印应用。研究了挤压成型的SAC砂浆的水化热、凝结时间、浆体和砂浆的流动性、形状保持性以及抗压强度。将HPMC用量、水灰比（W/C）和砂灰比（S/C）作为实验参数进行研究。水化热结果表明，HPMC可延缓SAC的水化。当水灰比为0.3和0.35且HPMC用量为0.5%至1.5%、水灰比为0.40且HPMC用量为0.5%、0.75%和1.5%、水灰比为0.45且HPMC用量为0.45%时，用维卡针测得的初凝和终凝时间会缩短；而当水灰比为0.4且HPMC用量为1.0%、水灰比为0.45且HPMC用量为0.75%至1.5%时，初凝和终凝时间会延长。流动性测量表明，HPMC显著提高了形状保持性。此外，添加HPMC显著提高了挤压成型砂浆的抗压强度。结果表明，HPMC可用于制备具有令人满意的形状保持性、凝结时间和抗压强度的3D打印SAC。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ac2/6316929/7bb049a501dc/materials-11-02415-g013.jpg
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