Comparative study of the effect of the type of alkali on the strain rate effect of geopolymer concrete

Luo Xin; Xu Jin-yu; Bai Er-lei; Li Wei-min

doi:10.11883/1001-1455(2014)03-0340-07

Volume 34 Issue 3

Aug. 2014

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Luo Xin, Xu Jin-yu, Bai Er-lei, Li Wei-min. Comparative study of the effect of the type of alkali on the strain rate effect of geopolymer concrete[J]. Explosion And Shock Waves, 2014, 34(3): 340-346. doi: 10.11883/1001-1455(2014)03-0340-07

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Luo Xin, Xu Jin-yu, Bai Er-lei, Li Wei-min. Comparative study of the effect of the type of alkali on the strain rate effect of geopolymer concrete[J]. Explosion And Shock Waves, 2014, 34(3): 340-346. doi: 10.11883/1001-1455(2014)03-0340-07

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Comparative study of the effect of the type of alkali on the strain rate effect of geopolymer concrete

doi: 10.11883/1001-1455(2014)03-0340-07

Luo Xin^{1
,
,},
Xu Jin-yu^{1, 2},
Bai Er-lei¹,
Li Wei-min³

1.
Department of Airfield and Building Engineering, Air Force Engineering University Engineering College, Xi'an 710038, Shaanxi, China
2.
College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi'an 710072, Shaanxi, China
3.
Airport Office, Air Force Logistics Department in Guangzhou Military Region, Guangzhou 510052, Guangdong, China

Funds: Supported by the National Natural Science Foundation of China (51208507, 51078350)

Received Date: 2012-11-22
Rev Recd Date: 2013-03-07
Publish Date: 2014-05-25

Abstract

Abstract

NaOH and sodium silicate-activated slag and fly ash based geopolymer concrete(NSSFGC) and NaOH and Na₂CO₃-activated slag and fly ash based geopolymer concrete(NNSFGC) with strength grades of C30 were prepared, the strain rate effects under impact loading were studied contrastly by using a 100-mm-diameter SHPB apparatus improved with the pulse shaper technique.The results indicate that, the peak stress of NSSFGC and NNSFGC increases with the increase of strain rate, which indicates that GC is a kind of strain rate sensitive material; strain rate sensitivity thresholds of NSSFGC and NNSFGC under dynamic compressive condition are 51.82 and 28.89 s^-1; the strain rate sensitivity is much stronger than ordinary concrete; the alkali-activator prepared with NaOH and Na₂CO₃ can be beneficial to give full play to overall strength property of GC.Thus it can be seen, that the strain rate sensitivity of NNSFGC is stronger than NSSFGC.
- solid mechanics,
- strain rate effect,
- split Hopkinson pressure bar(SHPB),
- geopolymer concrete(GC),
- dynamic compressive test,
- pulse shaping technique

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References(25)

References

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