Temperature evolution during the compaction of calcium silicate hydrate powders using a compression calorimeter
Journal article, 2019

Amorphous calcium silicate hydrate (CSH) undergoes contact-hardening property, i.e. the powder can be hardened by compression. A compression calorimeter was designed to determine the temperature evolution during the compaction of the powder. A platinum sensor (Pt100) was used as the temperature sensor and was positioned in the powder as well as in the compression die. A resolution of 0.01 °C with a sampling time of every second was used to monitor the temperature. Both theoretical calculation and simulations by COMSOL multiphysics showed that the device reliably evaluated the temperature during the compaction of CSH powders. The measurement was taken under semi-adiabatic conditions. The temperature profiles obtained from the measurement revealed the compression process and bonding development during the compaction of the powders. Finally, a linear relationship was observed between the compressive strength and the maximum temperature increase. This provides insight into the contact-hardening mechanism during the compaction of CSH powders.

Calcium silicate hydrate

Semi-adiabatic measurement

Temperature evolution

Compression calorimeter

Powder compaction

Author

Shuping Wang

Chongqing University

Chalmers, Architecture and Civil Engineering, Building Technology

Xiaoqin Peng

Chongqing University

Luping Tang

Chalmers, Architecture and Civil Engineering, Building Technology

Lin Lin

Chongqing University

Zhi Jun Dong

ShenZhen Institute of Information Technology

Lu Zeng

Chongqing University

Journal of Thermal Analysis and Calorimetry

1388-6150 (ISSN) 1588-2926 (eISSN)

1-13

Subject Categories

Ceramics

Manufacturing, Surface and Joining Technology

Other Materials Engineering

DOI

10.1007/s10973-019-08495-z

More information

Latest update

11/11/2019