Aspects of White Cement Production

The results of research aimed at the development of chemical technology for the production of white cement under the conditions of resource conservation and energy saving according to the program of sustainable development are given. Based on computer calculations using the created program “RomanCem”, the quantitative ratios of carbonate, aluminum and silica-containing components of the raw material mixtures for the production of white low-temperature firing cement (≤ 1200 °С) and Eco-cement were determined As a result of the study of 3-component systems based on chalk with aluminum hydroxide, dust quartz and microtalc, new compositions of starting mixtures were developed with a decrease in the content of carbonates and, accordingly, emissions of CO2 into the atmosphere, with a minimization of the content of colored oxides and a corresponding increase in the whiteness of cement. Peculiarities of the phase formation of the investigated mixtures during firing in the range of maximum temperatures of 1100-1200 °C and including the synthesis of ockermanite 2CaO•MgO•2SiO2 when using microtalc were revealed.