TY  - EJOU
AU  - Li, Zhengyang 
AU  - Guo, Wei 
AU  - Hu, Yueyang 
AU  - Wang, Xiao 
AU  - Qian, Binbin 
AU  - Jiang, Cuifeng 

TI  - Preparation and Performance of Ternesite-Ye’Elimite Clinker Produced from Steel Slag at Lower Temperature
T2  - Journal of Renewable Materials

PY  - 2022
VL  - 10
IS  - 11
SN  - 2164-6341

AB  - Ternesite (4CaO·2SiO<sub>2</sub>·CaSO<sub>4</sub>)-Ye’elimite (3CaO·3Al<sub>2</sub>O<sub>3</sub>·CaSO<sub>4</sub>) (simplified as TY) cement clinker was successfully prepared from steel slag at 1200°C in this study. XRD, TG/DSC and SEM were used to analyze the mineral
composition and hydration products of the TY clinker. The sintering process and hydration mechanism of the TY
clinker were investigated. Results show that a large amount of ternesite and ye’elimite have been formed at
1200°C, while ternesite has not been decomposed. Clinker minerals include ternesite, ye’elimite, gypsum and a
small amount of iron phase. Iron phase from steel slag can promote the formation of liquid phase with the presence of gypsum at 1200°C and thus lead to the coexistence of ternesite and ye’elimite. The compressive strength
of TY cement cured at 28 d is 59.5 MPa, which is higher than that of P. II 42.5 cement. This research provides a
sustainable and energy-effective way for the reutilization of steel slag, an otherwise valueless waste.
KW  - Liquid phase; low temperature calcination; steel slag; ternesite; waste utilization; ye’elimite

DO  - 10.32604/jrm.2022.019258