Influence of Lightly Burned MgO on the Mechanical Properties and Anticarbonization of Cement-Based Materials

This study aims to the influence of a lightly burned magnesium oxide (LBMO) expansion agent on rheological properties (the slump flow, plastic viscosity and variation shear stress) cement-based materials. Four different mass contents (i.e., 0%, 3%, 6% 9%) LBMO were selected. The following compressive strength value corresponding cement concrete tested. Cement with two grades 30 MPa 50 (C30 C50) was Results indicated that addition can effectively decrease fluidity increase fresh paste. An optimum dosage (3%) is most advantageous concrete. rate concrete, thus preventing inside cracks. Moreover, incorporation led reduction in paste an viscosity. It be found little difference exists MPa. Finally, increased LBMO, curing age improving carbonization resistance