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矿物掺合料能改善混凝土的孔隙结构和界面结构,参与胶凝材料的水化,提高混凝土的密实性,使外界的CO2和水很难渗入,从而可以提高了混凝土的抗渗性。矿粉能有效提高混凝土的抗碳化能力,单掺粉煤灰混凝土碳化深度是单掺矿粉混凝土2~5倍。粉煤灰和矿粉复掺能有效地减少混凝土碳化深度,提高混凝土的抗碳化能力。
Mineral admixtures can improve the pore structure and interface structure of concrete, participate in the hydration of cementitious materials, improve the compactness of concrete, make it difficult for outside CO2 and water to penetrate, and thus improve the impermeability of concrete. Mineral powder can effectively improve the anti-carbonation ability of concrete. The carbonation depth of single-mixed fly ash concrete is 2 to 5 times that of single mixed slag concrete. Fly ash and mineral powder complex mixing can effectively reduce the carbonation depth of concrete and improve the ability of concrete to resist carbonation.