矿物掺合料对碱矿渣粉煤灰胶凝材料改性研究

Comparative study on the modification of alkali-activated slag-fly ash cementitious material by mineral admixtures

研究沸石粉和偏高岭土2种矿物掺合料对固态碱矿渣粉煤灰胶凝材料的改性效果。结果表明,偏高岭土对碱矿渣粉煤灰胶凝材料的抗压强度具有明显增强效果,但降低了抗折强度;沸石粉对抗压强度和抗折强度均有增强作用;作为碱矿渣粉煤灰胶凝材料的活性掺合料,沸石粉优于偏高岭土,具有进一步研究的价值;偏高岭土和沸石粉在碱矿渣粉煤灰胶凝材料中发挥的强度优势不及矿渣粉煤灰混合料明显。

Comparative study on the modification effect of pulverized zeolite and metakaolin on the alkali-activated slag-fly ash eementitious material was conducted. The test result shows that,metakaolin can give a good enhancement to the compressive strength of solid alkali-activated slag-fly ash cementitious material,but reduce the flexural strength：pulverized zeolite can enhance the compressive and flexural strength：for this two kinds of mineral admixtures,pulverized zeolite is superior to metakaolin when used as the active admixture of alkali-activated slag-fly ash cementitious material,and has the value in further research：the strength advantages of metakaolin and pulverized zeolite in the eementitious material are inferior to that of slag and fly ash composite material.