中文摘要：

开发新型水泥和其它低碳胶凝材料是水泥工业CO2减排的有效途径。采用CO2养护,加速碳化活性MgO、CaO、粉煤灰和水泥四元组分配制的砂浆,制备低碳胶凝材料,研究碳化对砂浆力学性能和微观结构的影响。结果表明：在浓度为99%、压力为0.55 MPa的CO2气体条件下碳化处理3～9 h后,砂浆抗压强度提高了1.1～4.6倍。提高碳化温度、延长碳化时间均有利于砂浆强度的提高,且温度对砂浆强度的提高影响更为显著。碳化后生成大量碳化产物碳酸钙CaCO3和碳酸钙镁CaxMg1-xCO3,使得砂浆p H值降低、试件更加致密,砂浆试件中大孔数量明显减少,总孔隙率显著降低。

英文摘要：

This paper was to investigate the effect of carbonation curing on the compressive strength and microstructure of mortars comprised of reactive MgO, CaO, fly ash and cement. The results show that the compressive strengths of mortars, after carbonation curing in 99% CO2 at 0.55 MPa for 3-9 h, increased 1.1 to 4.6 times. The increase of temperature or carbonation curing time increases the compressive strengths of mortars. The treatment of CO2 decreases the pH value, enhances the microstructures densification and decreases the amount of relatively coarse pores and total pore volume due to the formation of calcite （CaCO3） and magnesium calcite （CaxMgl.xCO3）.