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楊   飛

 

（河海大學 土木與交通學院 ，南京 210098)

摘   要 ：礦渣粉煤灰地質(zhì)聚合物材料在應(yīng)對碳化作用 、凍融循環(huán)以及氯離子滲透等復(fù)雜環(huán)境時，耐久性能有待提升，為此，提出礦渣粉煤灰基地質(zhì)聚合物材料耐久性能研究。通過對礦渣粉煤灰基地質(zhì)聚合物的原料配比進行分析，將高爐礦渣和偏高嶺土按照不同比例添加到粉煤灰中，研究不同配比對材料耐久性能的影響，制備出地質(zhì)聚合物樣品，分別為粉煤灰主導(dǎo)型、高爐礦渣增強型以及偏高嶺土優(yōu)化型，并對其進行抗壓性能 、凍融循環(huán)測試，全面評估材料耐久性能隨時間的變化情況。結(jié)果表明：與粉煤灰主導(dǎo)型、高爐礦渣增強型的試驗結(jié)果相比，偏高嶺土優(yōu)化型的 XRD 駝峰出現(xiàn)在 21 . 5 °~ 29. 8 °區(qū)間內(nèi) ，尖銳衍射峰數(shù)量有所增加，在多次凍融循環(huán)后，偏高嶺土優(yōu)化型的外觀變化最小，重量損失率(  - 1 . 0% )   和力學性能保留率  (82% ) 均高于其他配比，表現(xiàn)出最優(yōu)的耐久性能，為該類材料在實際工程中的配比優(yōu)化提供依據(jù)。

關(guān)鍵詞：粉煤灰 ；地質(zhì)聚合物 ；耐久性能 ；抗壓強度 ；凍融循環(huán)

中圖分類號：TU599           

文獻標志碼：A            

文章編號： 1005- 8249   (2025)  02- 0033- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .02.006

 

YANG Fei

(School of Civil Engineering and Transportation, Hohai University ,  Nanjing 210098 ,  China)

Abstract: The durability of slag fly ash geological polymer material needs to be improved in dealing with complex environments such as carbonization, freezing and thawing cycle and chloride ion penetration, which leads to the long-term stability and reliability of the material in practical application. 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.

Key words: fly ash; geopolymer; durability performance; compressive strength; freeze-thaw cycle

作者簡介：楊   飛  (1980—),  男，碩士研究生，研究方向：

土木水利。

收稿日期：2024 - 12 - 09