1. In-situ and continuous monitoring of pore evolution of calcium sulfoaluminate cement at early age by electrical impedance measurement
- Author
-
Wei-Ming Ji, Wenjing Zhou, Shengwen Tang, Hongyu Shao, Zhen He, Zongjing Li, E. Chen, and Xinhua Cai
- Subjects
Cement ,In situ ,Materials science ,Metallurgy ,technology, industry, and agriculture ,0211 other engineering and technologies ,02 engineering and technology ,Building and Construction ,021001 nanoscience & nanotechnology ,Microstructure ,law.invention ,Differential scanning calorimetry ,Volume (thermodynamics) ,Magazine ,law ,021105 building & construction ,General Materials Science ,Composite material ,0210 nano-technology ,Porosity ,Electrical impedance ,Civil and Structural Engineering - Abstract
This paper investigates the microstructure evolution of CSA cement pastes with different water to cement ratios in various hydration stages. Microstructure information, such as porosity, cumulative and incremental pore volume of cement pastes, is revealed by the innovative non-contact electrical impedance measurement (NCEIM), low temperature differential scanning calorimetry (LT-DSC), nitrogen adsorption test and mercury intrusion porosimetry (MIP). The hydration features associated with microstructure evolution are identified by NCEIM, Micro-Raman spectra and heat evolution test. Through the overall analysis of experimental results, initial formation and evolution of microstructure of CSA cement pastes are identified.
- Published
- 2016