Effects of Calcium Carbide Residue and High-Silicon Limestone on Synthesis of Belite-Barium Calcium Sulphoaluminate Cement

Abstract

The influences of calcium carbide residue and high-silicon limestone on the mineral composition and performance of belite-barium calcium sulphoaluminate cement were studied by means of X-ray diffraction, petrographic and SEM–EDS. The results showed that calcium carbide residue had low decomposition temperature, which could promote the burnability of raw materials and improve the performances of minerals. Although, α-quartz brought by high-silicon limestone hindered the formation and the growth of alite, the increase of some trace constituents such as MgO promoted the formation of clinker minerals. The appropriate proportion of calcium carbide residue and high-silicon limestone was 1:0, and the compressive strength of the cement at 3, 7, 28 days were, respectively, 29.3, 40.5, and 81.1 MPa, which exhibited excellent mechanical properties.