掺粉煤灰砼的耐久性,尤其是碳化与防钢锈性能的研究、对合理而安全地掺用粉煤灰具有重要意义。本文采用由超量取代方法确定的28天等强砂浆试件,研究了碳化前后物相、碱度、透氧系数与孔结构的变化。砂浆试件的配比系根据相应的等强砼配比确定的。其实测强度见表1。 The durability of fly ash-removing ash, especially the research on the properties of carbonization and rust prevention, is of great significance for the rational and safe use of fly ash. In this paper, the 28-day equal strength mortar samples determined by the excess substitution method were used to study the changes of phase, alkalinity, oxygen permeability coefficient and pore structure before and after carbonization. The proportion of mortar specimens was determined according to the corresponding equal strength ratio. In fact, the measured intensity is shown in Table 1.