Effect of water‐soluble magnesium lactate on the volume stability of refractory castables containing calcium aluminate cement. Issue 1 (13th September 2021)

• Record Type: Journal Article
• Authors: Guo, Liu; Fu, Yunhe; Zhao, Zongqiang; Cui, Junyan; Mu, Yuandong; Jia, Quanli; Chen, Liugang
• Is Part Of: International journal of applied ceramic technology. Volume 19:Issue 1(2022)
• Page Start: 623
• Page End: 630
• Publication Date: 2021-09-13
• Subjects: calcium aluminate cement -- castables -- magnesium lactate -- refractories -- volume‐stability; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.13881
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: A kind of organic magnesium salt, water‐soluble magnesium lactate, was used as the MgO‐precursor in new forms to identify the particular impact of additive dispersity on properties of calcium aluminate cement (CAC)‐bonded castables, especially the volume stability. Magnesium lactate could dissolve in water in the mixing process, distribute uniformly, and decompose during heating, providing space for counterbalancing the expansion from in‐situ calcium aluminates and MgAl2 O4 spinel generation. Hence, in this study, CAC‐bonded castables containing 0–1.2 wt% magnesium lactate were prepared. The volume stability and thermo‐mechanical strength of castables were tested. Results show that the dissolution of magnesium lactate in water distinctly enhances the volume stability of castables. To understand the underlying mechanism of water‐soluble magnesium lactate on the samples, phase compositions and microstructure development of castable matrices were examined.