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| 碱类型对地聚合物混凝土应变率效应影响的对比研究 | |
| 引用本文： | 罗 鑫,许金余,白二雷,李为民.碱类型对地聚合物混凝土应变率效应影响的对比研究[J].爆炸与冲击,2014,34(3):340-346. |
| 作者姓名： | 罗 鑫 许金余 白二雷 李为民 |
| 作者单位： | 1.空军工程大学工程学院机场建筑工程系,陕西 西安 710038 |
| 基金项目： | 国家自然科学基金项目(51208507,51378497);陕西省青年科技新星项目(2013KJXX-81)~~ |
| 摘 要： | 采用经波形整形技术改进后的?100 mm SHPB实验装置开展了强度等级均为C30的NS激发矿渣粉煤灰基地聚合物混凝土(NaOH and sodium silicate-activated slag and fly ash based geopolymer concrete,NSSFGC)和NN激发矿渣粉煤灰基地聚合物混凝土(NaOH and Na2CO3-activated slag and fly ash based geopolymer concrete,NNSFGC)的动态压缩实验,并对比分析了在冲击荷载作用下的应变率效应。结果表明:NSSFGC和NNSFGC的峰值应力均随应变率的增加而越大。这表明,GC为应变率敏感材料;在动态压缩状态下,NSSFGC和NNSFGC的应变率敏感阈值分别为51.82、28.89 s-1;GC的应变率敏感性强于普通混凝土;NN型激发剂更有利于发挥GC的整体强度特性。由此可知,NNSFGC的应变率敏感性明显强于NSSFGC。 |
| 关 键 词： | 固体力学 应变率效应 分离式霍普金森压杆 地聚合物混凝土 动态压缩实验 波形整形技术 |
| 收稿时间： | 2012-11-22 |
Comparativestudyoftheeffectofthetypeofalkali onthestrainrateeffectofgeopolymerconcrete |
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| LuoXin,XuJin-yu,BaiEr-lei,LiWei-min.Comparativestudyoftheeffectofthetypeofalkali onthestrainrateeffectofgeopolymerconcrete[J].Explosion and Shock Waves,2014,34(3):340-346. | |
| Authors: | LuoXin XuJin-yu BaiEr-lei LiWei-min |
| Institution: | 1.Department of Airfield and Building Engineering, Air Force Engineering University Engineering College, Xi'an 710038, Shaanxi, China2.College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi'an 710072, Shaanxi, China3.Airport Office, Air Force Logistics Department in Guangzhou Military Region, Guangzhou 510052, Guangdong, China |
| Abstract: | NaOHandsodiumsilicate-activatedslagandflyashbasedgeopolymerconcrete(NSSFGC) andNaOH and Na2CO3-activatedslagandflyash based geopolymerconcrete(NNSFGC)with strengthgradesofC30wereprepared,thestrainrateeffectsunderimpactloadingwerestudiedcontrastlybyusinga100- mm-diameterSHPBapparatusimprovedwiththepulseshapertechnique.The resultsindicatethat,thepeakstressofNSSFGCandNNSFGCincreaseswiththeincreaseofstrain rate,whichindicatesthatGCisakindofstrainratesensitivematerial;strainratesensitivitythresholdsofNSSFGCandNNSFGCunderdynamiccompressiveconditionare51.82and28.89s- 1;the strainratesensitivityis muchstrongerthanordinaryconcrete;thealkali-activatorprepared with NaOHandNa2CO3canbebeneficialtogivefullplaytooverallstrengthpropertyofGC.Thusitcan beseen,thatthestrainratesensitivityofNNSFGCisstrongerthanNSSFGC. |
| Keywords: | solid mechanics strainrateeffect splitHopkinsonpressurebar(SHPB) geopolymer concrete(GC)" target="_blank">concrete(GC)')" href="#">geopolymer concrete(GC) dynamiccompressivetest pulseshapingtechnique |
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