Modified composite admixture capable of inhibiting alkali-silica reaction activity of granite aggregate

The invention belongs to the technical field of concrete modification, and particularly relates to a modified composite admixture capable of inhibiting the alkali-silica reaction activity of granite aggregate. The modified composite admixture comprises, by weight, 60-70 parts of granite aggregate, 20-30 parts of coal-fired furnace slag powder, 10-20 parts of fly ash and 20-30 parts of silica fume.By utilizing the synergistic effect generated by the fly ash, the coal-fired furnace slag powder and the silica fume, the purpose of inhibiting the alkali-silica reaction activity of the granite aggregate is achieved under the condition that a small amount of fly ash is mixed, and the industrial value is achieved. 本发明属于混凝土改性技术领域，具体涉及一种可抑制花岗岩骨料碱硅酸反应活性的改性复合掺合料，按照重量份数计算，包括如下组分：花岗岩骨料60~70份，燃煤炉渣粉20~30份，粉煤灰10~20份，硅灰20~30份。本发明利用粉煤灰与燃煤炉渣粉和硅灰产生的协同作用，在少量掺和粉煤灰的情况下达到抑制花岗岩骨料碱硅酸反应活性的目的，具有产业价值。