Quantitative characterization of the early hydration of magnesium potassium phosphate cement: In-situ experiment with low field NMR

被引：7
|
作者：
Ma, Shanliang [1 ]
Zhang, Zengqi [1 ]
Liu, Xiaoming [1 ]
Han, Fanghui [2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Res Inst Urbanizat & Urban Safety, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 377卷
基金：
中国国家自然科学基金;
关键词：
Magnesium potassium phosphate cement; Low field NMR; Reaction degree; Setting time; Compressive strength; FLY-ASH; STEEL SLAG; SILICA FUME; RATIO; PASTE; COMBINATION; STRENGTH; POROSITY; KINETICS; MORTARS;
D O I：
10.1016/j.conbuildmat.2023.131066
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The in-situ characterization of the rapid early reaction of magnesium potassium phosphate cement (MKPC) via common methods is quite difficult. In this study, the low field nuclear magnetic resonance (LF-NMR) method was used for in-situ monitoring the reaction degree of MgO in MKPC. The comparisons of the results with the reaction degree determined by XRD-Rietveld, BSE image analysis and TG analysis methods showed that LF-NMR is a correct and effective method for the rapid and accurate characterization of the reaction kinetics of MKPC. The insitu kinetic data contributed to the simulation of the porosity development of MKPC, and a strong relationship between the calculated porosity and compressive strength was then established, which is expected to be used for further performance prediction.
引用
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页数：10
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