Thermal and hydration properties of 3D printing gypsum materials incorporated with accelerators

IF 3 3区 工程技术 Q2 CHEMISTRY, ANALYTICAL
Zhenzhen Zhi, Yanfei Guo, Zihao Jin, Xiaohong Ru, Xinya Yang, Baoguo Ma
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Abstract

3D printing technology, as a landmark technology for significant changes in modern manufacturing industry, has become an important means to lead the future of construction to achieve convenient, personalised, functional integration. In this study, alpha hemihydrate gypsum (α-HH) was used as the 3D printing matrix material, and the accelerators were introduced to match the slurry-based 3D printing process. The hydration heat and thermogravimetric changes were characterised to analyse the effect of accelerators on the thermal properties via thermogravimetry–differential scanning calorimetry (TG-DSC) analysis. Further, X-ray diffraction analysis (XRD) and morphological observations of the hardened gypsum were conducted to assess the impact of accelerators on the hydration process of α-HH. The results showed that all accelerators considerably reduced the hydration reaction time of α-HH, with the maximum exothermic peak observed in the order lithium sulphate (LS, 6.78 min) > sodium sulphate (NS, 11.33 min) > potassium sulphate (KS, 15.64 min) > control sample (26.43 min). Under the influence of KS, the proportion of dihydrate gypsum crystals reached 50.5% within 5 min of α-HH hydration. The addition of accelerators was shown to be effective for slurry-based 3D printing gypsum process.

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来源期刊
CiteScore
8.50
自引率
9.10%
发文量
577
审稿时长
3.8 months
期刊介绍: Journal of Thermal Analysis and Calorimetry is a fully peer reviewed journal publishing high quality papers covering all aspects of thermal analysis, calorimetry, and experimental thermodynamics. The journal publishes regular and special issues in twelve issues every year. The following types of papers are published: Original Research Papers, Short Communications, Reviews, Modern Instruments, Events and Book reviews. The subjects covered are: thermogravimetry, derivative thermogravimetry, differential thermal analysis, thermodilatometry, differential scanning calorimetry of all types, non-scanning calorimetry of all types, thermometry, evolved gas analysis, thermomechanical analysis, emanation thermal analysis, thermal conductivity, multiple techniques, and miscellaneous thermal methods (including the combination of the thermal method with various instrumental techniques), theory and instrumentation for thermal analysis and calorimetry.
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