The effect of hydroxides on the workability of the castables bonded with hydrated magnesium carboxylate

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2025-02-27 DOI:10.1111/ijac.15073

Jianjun Chen, Lihua Lv, Qingfeng Wang, Chaofan Yin, Junrui Yang, Xue Li, Wei Luo, Ming Liu, Yinggang Zhao, Dongmei Shi

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引用次数: 0

Abstract

This study investigates the effect of Al(OH)₃, Mg(OH)₂, or Ca(OH)₂ on the performance of HMC-bonded castables (HMCC), aiming to synergistically improve the workability and medium-temperature mechanical properties of HMCC. The results indicate that Al(OH)₃ synergistically improves the medium-temperature mechanical properties, workability, and thermal shock resistance of HMCC. Specifically, Al(OH)₃ prolonged the setting time from 21 to 27 min, whereas Mg(OH)₂ and Ca(OH)₂ reduced it to 19 and 7 min, respectively, due to the low solubility of aluminum citrate formed by Al(OH)₃, which inhibits HMCC ionization. Additionally, Al(OH)₃ increases the aspect ratio of hydration products, resulting in a 29.8% decrease in flowability compared with the control sample N. The addition of these compounds significantly improves medium-temperature mechanical properties, with Al(OH)₃ increasing the cold modulus of rupture from .17 to 1.74 MPa at 500°C and from 1.24 to 2.51 MPa at 800°C. Moreover, Al(OH)₃ improves the the residual strength ratio after thermal shock from 26.16% to 28.70%, unlike Ca(OH)₂, which lowers it to 19.02%, by enhancing resistance to microcrack propagation.

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氢氧化物对水合羧酸镁浇注料和易性的影响

本文研究了Al(OH)3、Mg(OH)2、Ca(OH)2对HMCC粘结浇注料（HMCC）性能的影响，旨在协同改善HMCC的和易性和中温力学性能。结果表明，Al(OH)3能协同提高HMCC的中温力学性能、和易性和抗热震性。其中，Al(OH)3将凝结时间从21分钟延长至27分钟，而Mg(OH)2和Ca(OH)2分别将凝结时间缩短至19分钟和7分钟，这是由于Al(OH)3形成的柠檬酸铝的溶解度低，抑制了HMCC的电离。此外，Al(OH)3增加了水化产物的长径比，导致流动性比对照样品n降低了29.8%。这些化合物的加入显著改善了中温力学性能，Al(OH)3使断裂冷模量在500℃时从0.17增加到1.74 MPa，在800℃时从1.24增加到2.51 MPa。此外，Al(OH)3通过增强对微裂纹扩展的抵抗能力，将热冲击后残余强度比从26.16%提高到28.70%，而Ca(OH)2则降低到19.02%。

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

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;