Performance of belite- sulfoaluminate cements

摘要

Cements, which contain a high proportion of the mineral belite, often with an additional component such as calcium sulfoaluminate included to improve early strength development, are currently attracting a great deal of interest worldwide. This interest is largely due to their intrinsically lower energy requirements and CO_2 emissions on manufacture than conventional Portland cements (PC). The properties of two commercially produced belite-sulfoaluminate based cements have been studied. Concretes made using these cements show rapid strength development and excellent sulfate resistance. Compressive strength at 20 deg C is comparable with PC concretes made using similar cement contents and water-to-cement (w/c) ratios. However, carbonation rates under natural and accelerated conditions are high when compared with PC concretes made using similar mix designs.