Open AccessPreparation, manufacture and properties of new β-belite cement
Author(s) -
Jan Kohout,
Petr Koutník,
Aleš Soukup
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1039/1/012002
Subject(s) - belite , cement , materials science , raw material , clinker (cement) , lime , silicate , silica fume , sodium silicate , mineralogy , portland cement , potash , metallurgy , potassium , chemical engineering , geology , chemistry , organic chemistry , engineering
The objective of this work is the optimization of the synthesis of β-belite cement. Belite cement (dicalcium silicate) is a promising material due to a lower CO 2 emission and lower energy consumption during its production. Cement with a high content of β-belite was prepared from ground limestone, amorphous silica and alkaline silicate solution. The raw materials were mixed, the mixtures were compacted and then burnt in an electric furnace. Different CaO/SiO 2 ratios, firing temperatures, raw materials and firing time were tested. The samples were characterized by XRD, SEM and free lime content. Differences between the cements with high content of β-belite prepared on a laboratory scale (tens of grams) and on a larger scale (tens of kilograms) were studied. Belite cement prepared on a larger scale had better properties compared to a laboratory scale. Optimal synthesis of β-belite cement consisted of mixing ground limestone, silica fume and liquid potassium silicate and burning at temperature 1100°C for more than 2 hours.