摘要
矿渣粉煤灰地质聚合物材料在应对碳化作用、冻融循环以及氯离子渗透等复杂环境时,耐久性能有待提升,为此,提出矿渣粉煤灰基地质聚合物材料耐久性能研究。通过对矿渣粉煤灰基地质聚合物的原料配比进行分析,将高炉矿渣和偏高岭土按照不同比例添加到粉煤灰中,研究不同配比对材料耐久性能的影响,制备出地质聚合物样品,分别为粉煤灰主导型、高炉矿渣增强型以及偏高岭土优化型,并对其进行抗压性能、冻融循环测试,全面评估材料耐久性能随时间的变化情况。结果表明:与粉煤灰主导型、高炉矿渣增强型的试验结果相比,偏高岭土优化型的XRD驼峰出现在21.5°~29.8°区间内,尖锐衍射峰数量有所增加,在多次冻融循环后,偏高岭土优化型的外观变化最小,重量损失率(-1.0%)和力学性能保留率(82%)均高于其他配比,表现出最优的耐久性能,为该类材料在实际工程中的配比优化提供依据。
The durability of slag fly ash geological polymer needs to be improved in dealing with complex environments such as carbonization,freezing and thawing cycle and chloride ion penetration.Therefore,the durability properties of slag fly ash is proposed.By analyzing the ratio of raw material of slag fly ash base polymer,the blast furnace slag and kaolin added to the fly ash according to different proportions,study the influence of different ratio of the material durability,prepare geological polymer samples,respectively for fly ash,blast furnace slag enhanced and kaolin optimization,and the compressive performance test and freeze-thaw cycle test,comprehensively evaluate the change of material durability over time.The results show that compared with the test results of fly ash and blast furnace slag,the hump of XRD appeared in 21.5°~29.8°,and the number of sharp diffraction peaks increased.After the repeated freeze-thaw cycles,the appearance of the optimized kaolin was minimized,the weight loss rate(1.0%)and the mechanical performance retention rate(82%)are higher than other ratios,showing the optimal durability performance and providing the basis for the ratio optimization of such materials in practical engineering.
作者
杨飞
YANG Fei(School of Civil Engineering and Transportation,Hohai University,Nanjing 210098,China)
出处
《粉煤灰综合利用》
2025年第2期33-36,59,共5页
Fly Ash Comprehensive Utilization
关键词
粉煤灰
地质聚合物
耐久性能
抗压强度
冻融循环
fly ash
geopolymer
durability performance
compressive strength
freeze-thaw cycle
