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THE EFFECT OF THE Ⅱ GRADE FLY ASH ON PREPAREING HIGH-VOLUME FLY ASH CONCRETE
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摘要: 采用微观分析技术，研究了江西省当地产的Ⅱ级粉煤灰的性状，并选用当地典型原材料，采用超量取代的方法，选取5种不同掺量的粉煤灰，配制中等强度的大掺量粉煤灰混凝土(HighFly-ashContentConcrete，简称HFCC)，综合分析和探讨了大掺量粉煤灰混凝土的力学性能和耐久性。结果表明，与普通混凝土相比，采用江西省Ⅱ级灰配制的大掺量粉煤灰混凝土后期强度增幅显著，56d强度甚至能超过普通混凝土，弹性模量-强度比和抗渗性均高于普通混凝土，而抗冻性和抗碳化能力均有所下降。Abstract: The chacracter of the local Ⅱ grade fly ash from Jiangxi Province was studied using microanalysis technology,and medium strength grade of high fly-ash content concrete(abbreviation : HFCC) was prepared by using five different contents of fly ash and the other local typical raw materials of Jiangxi Province through high-substitute way,then the mechanical properties and durability of the concrete were discussed.The results show that the growth of later strength of HFCC is more substantial than the normal concrete,and its 56 d strength may be over that of the normal concrete,both of the elastic modulus-strength ratio and the permeability are above the normal concrete,but the anti-frost ability and anti-carbonation ability are decreased.
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[2] 钱觉时.粉煤灰特性与粉煤灰混凝土[M].北京:科学出版社,2002; 赵铁军,李秋义.高强与高性能混凝土及其应用[M].北京:中国建材工业出版社,2004; [3] 吴正直.粉煤灰房建材料的开发与应用[M].北京:中国建材工业出版社,2003; [4] 胡明玉,桂国庆.大掺量粉煤灰混凝土及其应用前景[J].中国建材科技,1998,7(1):1-4; [5] 胡明玉.大掺量粉煤灰混凝土研究[J].混凝土,1998(1):29-33. -
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