Hydrothermal Synthesis of Dicalcium Silicate Based Cement

2nd International Conference on Civil Engineering and Materials Science

Dutta, N.^1 ; Chatterjee, A.^1

Aditya Birla Science and Technology Company Pvt. Ltd., MIDC Taloja, Taluka Panvel, Navi Mumbai, Maharashtra

410208, India^1

关键词: Calcium silicate hydrate;    Carbon dioxide emissions;    Heating conditions;    Intermediate phase;    Intermediate product;    Ordinary Portland cement;    Synthesis parameters;    Water-to-solid ratios;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/216/1/012027/pdf
DOI  :  10.1088/1757-899X/216/1/012027

来源: IOP

【 摘 要 】

It is imperative to develop low energy alternative binders considering the large amounts of energy consumed as well as carbon dioxide emissions involved in the manufacturing of ordinary Portland cement. This study is on the synthesis of a dicalcium silicate based binder using a low temperature hydrothermal route.The process consists of synthesizing an intermediate product consisting of a calcium silicate hydrate phase with a Ca:Si ratio of 2:1 and further thermal treatment to produce the β-Ca2SiO4(C2S) phase.Effect of various synthesis parameters like water to solid ratio, dwell time and temperature on the formation of the desired calcium silicate hydrate phase is reported along with effect of heating conditions for formation of the β-C2S phase. Around 77.45% of β-C2S phase was synthesized by thermal treatment of the intermediate phase at 820°C.