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

[1]	Davidovits J. Geopolymers and geopolymeric materials[J]. Journal of Thermal Analysis and Calorimetry, 1989, 35(2): 429-441. doi: 10.1007/BF01904446
[2]	Luo X, Xu J, Bai E, et al. Systematic study on the basic characteristics of alkali-activated slag-fly ash cementitious material system[J]. Construction and Building Materials, 2012, 29(4): 482-486.
[3]	D M Roy. New strong cement materials: chemically bonded ceramics[J]. Science, 1987, 235(4789): 651-658. doi: 10.1126/science.235.4789.651
[4]	Miranda J M, Fernndez-Jiménez A, Gonzlez J A, et al. Corrosion resistance in activated fly ash mortars[J]. Cement and Concrete Research, 2005, 35(6): 1210-1217. doi: 10.1016/j.cemconres.2004.07.030
[5]	Bakharev T. Durability of geopolymer materials in sodium and magnesium sulfate solutions[J]. Cement and Concrete Research, 2005, 35(6): 1233-1246. doi: 10.1016/j.cemconres.2004.09.002
[6]	Davidovits J. Geopolymers[J]. Journal of Thermal Analysis and Calorimetry, 1991, 37(8): 1633-1656. doi: 10.1007/BF01912193
[7]	Davidovits J. Properties of geopolymer cements[C]//1st International Conference on Alkaline Cement and Concrete. Kiev, Ukraine, 1994, 1: 131-149.
[8]	Palomo A, Macias A, Blanco M T, et al. Physical, chemical and mechanical characterization of geopolymers[C]//Proceedings of the 9th International Congress on the Chemistry of Cement. New Delhi, India, 1992, 5: 505-511.
[9]	Purdon A O. The action of alkalis on blast-furnace slag[J]. Journal of the Society of Chemical Industry, 1940, 59: 191-202. doi: 10.1002/jctb.5000591202
[10]	许金余, 李为民, 范飞林, 等.地质聚合物混凝土的冲击力学性能研究[J].振动与冲击, 2009, 28(1): 46-51. doi: 10.3969/j.issn.1000-3835.2009.01.011 Xu Jin-yu, Li Wei-min, Fan Fei-lin, et al. Study on the impact mechanical properties of geopolymer concrete[J]. Journal of Vibration and Shock, 2009, 28(1): 46-51. doi: 10.3969/j.issn.1000-3835.2009.01.011
[11]	Mihashi H, Wittmann F H. Stochastic approach to study the influence of rate of loading on strength of concrete[M]. Wittmann: Delft University of Technology, 1980: 23-54.
[12]	Wakabayashi M, Nakamura T, Yoshida N, et al. Dynamic loading effects on the structural performance of concrete and steel materials and beams[C]//Proceeding of 7th the World Conference on Earthquake Engineering. Turkey, 1980, 6(3): 271-278.
[13]	Lok T S, Zhao P J. Impact response of steel fiber-reinforced concrete using a split Hopkinson pressure bar[J]. Journal of Materials in Civil Engineering, 2004, 16(1): 54-59. doi: 10.1061/(ASCE)0899-1561(2004)16:1(54)
[14]	Li W, Xu J. Impact characterization of basalt fiber reinforced geopolymeric concrete using a 100-mm-diameter split Hopkinson pressure bar[J]. Materials Science and Engineering: A, 2009, 513: 145-153.
[15]	Li W, Xu J. Mechanical properties of basalt fiber reinforced geopolymeric concrete under impact loading[J]. Materials Science and Engineering: A, 2009, 505(1): 178-186. http://www.sciencedirect.com/science/article/pii/S0921509308013567
[16]	Frew D J, Forrestal M J, Chen W. Pulse shaping techniques for testing brittle materials with a split Hopkinson pressure bar[J]. Experimental Mechanics, 2002, 42(1): 93-106. doi: 10.1007/BF02411056
[17]	Lee O S, Kim S H, Han Y H. Thickness effect of pulse shaper on dynamic stress equilibrium and dynamic deformation behavior in the polycarbonate using SHPB technique[J]. Journal of Experimental Mechanics, 2006, 21(1): 51-60.
[18]	Chen W, Lu F, Winfree N. High-strain-rate compressive behavior of a rigid polyurethane foam with various densities[J]. Experimental Mechanics, 2002, 42(1): 65-73. doi: 10.1007/BF02411053
[19]	Chen W, Frew D J, Forrestal M J, et al. Dynamic compression testing of soft materials[J]. Journal of Applied Mechanics, 2002, 69(3): 214-223. doi: 10.1115/1.1464871
[20]	李夕兵, 古德生.岩石冲击动力学[M].长沙: 中南工业大学出版社, 1994.
[21]	罗鑫, 许金余, 李为民, 等.应力脉冲在SHPB实验中弥散效应的数值模拟与频谱分析[J].实验力学, 2010, 25(4): 451-456. Luo Xin, Xu Jin-yu, Li Wei-min, et al. Numerical simulation and spectral Analysis of dispersion effect of stress pulse in SHPB tests[J]. Journal of Experimental Mechanics, 2010, 25(4): 451-456.
[22]	王礼立.应力波基础[M].北京: 国防工业出版社, 2005: 30-74.
[23]	Bishcholff P H, Perry S H. Impact behavior of plain concrete in uniaxial compression[J]. Journal of Engineering Mechanics, 1995, 121(6): 685-693. doi: 10.1061/(ASCE)0733-9399(1995)121:6(685)
[24]	Tedesco J W, Ross C A, Kuennen S T. Experimental and numerical analysis of high strain rate splitting tensile tests[J]. ACI Materials Journal, 1993, 90(2): 162-169.
[25]	Ross C A, Jerome D M, Tedesco J W, et al. Moisture and strain rate effects on concrete strength[J]. ACI Materials Journal, 1996, 93(3): 293-300.