Preparation of the saving-energy sulphoaluminate cement using MSWI fly ash.
MSWI fly ash was used as a major cement raw material in sintering sulphoaluminate cement clinker successfully in the laboratory. Sintering system, mechanical performance, hydration process and microstructure of the clinker was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence spectrometry (XRF), etc. The result shows that the clinker can be sintered properly under the temperature of 1200-1300 degrees C and sintered time of 120 min. Cl(-) content in the clinker made with MSWI fly ash is about 1.08%. However most Cl(-) cannot leach out in water solution from the hardened cement paste during curing age between 1d and 28d because of the Cl(-) being combined in clinker minerals and its hydrates. The compressive strength of the sulphoaluminate cement was high in early age while that developed smoothly in later age.
Shi
Hui-sheng
HS
Key Laboratory of Advanced Civil Engineering Materials of Education Ministry, Tongji University, Shanghai 200092, China. shs@tongji.edu.cn
Deng
Kai
K
Yuan
Feng
F
Wu
Kai
K
D000537:Aluminum Oxide / Q000138:chemical synthesis*; D002244:Carbon; D060729:Coal Ash; D003246:Conservation of Energy Resources / Q000379:methods*; D003252:Construction Materials; D008422:Materials Testing; D052638:Particulate Matter; D010865:Pilot Projects; D013696:Temperature
D060729:Coal Ash; D052638:Particulate Matter; D002244:Carbon; D000537:Aluminum Oxide