6TH International Congress on Technology - Engineering - Kuala Lumpur3 - Malaysia (2018-07-19)

Synthesis And Hydration Mechanism Of Calcium Sulfoaluminate Cement From Industrial Waste Materials

Calcium sulfoaluminate cement (CSA cement) is one kind of alternative binder instead of Ordinary Portland Cement (OPC), due to lower energy consumption and CO2 emission in synthesizing processes. In this work, several industrial waste materials such as marble dust waste, FGD gypsum, ceramics dust waste and napier grass ash were used as raw materials for synthesizing the CSA cement. The raw materials were mixed and calcined at 1,200 ?C, 1,250 ?C and 1,300 ?C for 30 min. The XRF and XRD techniques were carried out for investigating the chemical composition and phase content, respectively. The Rietveld refinement technique was used to investigating the phase evolution of CSA clinker from the XRD patterns. The CSA clinker, which was calcined at selected condition, was mixed with 15% of gypsum to study the hydration mechanism. The several characterization methods including with XRD, FTIR and SEM were intensively investigated. The ettringite, portlandite and AFm phases were observed in the hydration product.
Pithiwat Tiantong, Phongthorn Julphunthong