为克服传统硅酸盐水泥材料在盐湖环境中性能劣化严重的不足,通过浸烘循环,对比研究了在清水和模拟盐湖环境下,碱激发矿渣(AAS)水泥和硅酸盐水泥(PC)强度发展和微观结构的变化.实验结果表明:AAS材料具有优异的抗盐湖侵蚀能力,其强度随着养护龄期延长逐渐提高,20次循环之前强度增长迅速,且激发剂含量越高,强度增长约快.养护于盐湖溶液中的PC强度随时间逐渐下降,40次浸烘循环后完全破坏.激发剂含量越高,处于盐湖溶液中的碱激发材料孔隙率越低,扫描电镜结果表明,在材料孔隙中结晶的石膏晶体和氯化钠晶体有效填充了孔隙.盐湖环境使得PC多害孔含量明显增加,但使AAS水泥孔结构得到细化,提高了材料的力学性能.
参考文献
| [1] | 王复生,秦晓娟,孙瑞莲.青海察尔汗盐湖条件下水泥混凝土侵蚀的试验研究[J].硅酸盐通报,2003(04):25-28. |
| [2] | Resistance to chemical attack of bittern-resisting cement in high-bittern environment[J].北京科技大学学报（英文版）,2005(05):469-475. |
| [3] | T. Bakharev;J.G. Sanjayan;Y.-B. Cheng .Sulfate attack on alkali-activated slag concrete[J].Cement and Concrete Research,2002(2):211-216. |
| [4] | Vanchai Sata;Apha Sathonsaowaphak;Prinya Chindaprasirt .Resistance of lignite bottom ash geopolymer mortar to sulfate and sulfuric acid attack[J].Cement & concrete composites,2012(5):700-708. |
| [5] | Susan A. Bernal;John L Provis;Brant Walkley.Gel nanostructure in alkali-activated binders based on slag and fly ash, and effects of accelerated carbonation[J].Cement and Concrete Research,2013:127-144. |
| [6] | Hamdy El-Didamony;Ahmed A. Amer;Hamdy Abd Ela-ziz .Properties and durability of alkali-activated slag pastes immersed in sea water[J].CERAMICS INTERNATIONAL,2012(5):3773-3780. |
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