Concrete shrinkage usually results in the decrease in bearing capacity, durability and impact resistance of Concrete-Filled steel tube (CFST) structures during its service life. High strength expansive concrete (HSEC) is recently developed to deal with the shrinkage cracking in CFST structures. In this study, dynamic compressive tests and dynamic splitting tensile tests on the developed grade C60, C70 and C80 HSEC were performed using a split Hopkinson pressure bar device. Test results show that the expansive concrete is a typical rate-sensitive material, and its dynamic compressive strength and dynamic splitting tensile strength both increase with the strain rate. The compressive strength dynamic increase factor (DIFc) of HSEC is smaller than that of the ordinary concrete under the same strain rate, whereas the splitting tensile dynamic increase factor (DIFt) is larger than that of the ordinary concrete. All the test data were classified to establish calculation models of DIFc, peak toughness (Rp), specific energy absorption (SEA), and DIFt, which provide a theoretical basis for the design and application of HSEC and CFST in engineering.
CaoQChengYLCaoML, et al. (2017) Workability, strength and shrinkage of fiber reinforced expansive self-consolidating concrete[J]. Construction & Building Materials131(Jan.30): 178–185.
2.
ChenXGaoP WGengF, et al. (2012) Research on deformation of cement paste with MgO-expansive[J]. Bulletin of the Chinese Ceramic Society31(03): 617–621. (in Chinese).
3.
ChenXDWuSXZhouJK (2013) Experimental and modeling study of dynamic mechanical properties of cement paste, mortar and concrete[J]. Construction and Building Materials47: 419–430.
4.
ChenLFangQJiangX Q, et al. (2015) Combined effects of high temperature and high strain rate on normal weight concrete[J]. International Journal of Impact Engineering86: 40–56.
5.
ChenLYueCJZhouYK, et al. (2021) Experimental and mesoscopic study of dynamic tensile properties of concrete using direct-tension technique[J]. International Journal of Impact Engineering155: 103895.
6.
Comite Euro-International Du Beton (1993) CEB-FIP Model Code 1990[S]. Trowbridge. Wiltshire, UK: Redwood Books.
7.
DongSFHanBGYuX, et al. (2018) Dynamic impact behaviors and constitutive model of super-fine stainless wire reinforced reactive powder concrete[J]. Construction and Building Materials184: 602–616.
8.
FrewD JForrestalM JChenW (2002) Pulse shaping techniques for testing brittle materials with a split Hopkinson pressure bar[J]. Experimental Mechanics42(1): 93–106.
9.
FujikakeKMoriKUebayashiK, et al. (2000) Dynamic properties of concrete materials with high rates of tri-axial compressive loads. J]. Structures and Materials8: 511–522.
10.
FujikakeKSengaTUedaN, et al. (2006) Effects of strain rate on tensile behavior of reactive powder concrete[J]. Journal of Advanced Concrete Technology4: 79–84.
11.
GaoYXuJBaiE, et al. (2015) Static and dynamic mechanical properties of high early strength alkali activated slag concrete[J]. Ceramics International41(10): 12901–12909.
12.
GroteD LPark1S WZhouM (2001) Dynamic behavior of concrete at high strain rates and pressures: I. experimental characterization[J]. International Journal of Impact Engineering25: 869–886.
13.
HaoYHaoH (2014) Influence of the concrete DIF model on the numerical predictions of RC wall responses to blast loadings[J]. Engineering Structures73: 24–38.
14.
HaoYHaoHLiZ (2010) Numerical analysis of lateral inertial confinement effects on impact test of concrete compressive material properties[J]. International Journal of Protective Structures1(1): 145–168.
15.
HuLLHuangRYGaoGF, et al. (2019) Method of determining strain rate in SHPB experiment of concrete materials[J]. Explosion and Shock Waves39(6): 1–9. (in Chinese).
16.
HuangT (2004) Study on Dimension Effect of Concrete Core[D]. Chongqing: Chongqing University. (in Chinese).
17.
LiCYShangPRLiFL, et al. (2020a) Shrinkage and mechanical properties of self-compacting SFRC with calcium-sulfoaluminate expansive agent [J]. Materials13(3): 588.
18.
LiHWangYWangYJ, et al. (2020b) Effect of CaO and MgO based expansive agent on deformation and mechanical properties of concrete-filled steel tubes[J]. Construction and Building Materials250: 118723.
19.
LiSKChengSKMoLWDengM (2020c) Effects of steel slag powder and expansive agent on the properties of Ultra-High Performance Concrete (UHPC): based on a case study. J]. Materials13(3): 683.
20.
LiXC (2013) Mechanical Properties and Durability Performance of Reactive Magnesia Cement concrete[D]. Cambridge: University of Cambridge.
21.
MaHYYueCJYuHF, et al. (2020) Experimental study and numerical simulation of impact compression mechanical properties of high strength coral aggregate seawater concrete[J]. International Journal of Impact Engineering137: 103466.
22.
MalvarLJRossCA (1998) Review of strain rate effects for concrete in tension[J]. ACI Materials Journal95: 735–739.
QianXJiangLHSongZJ, et al. (2020) Impact of elevated curing temperature on mechanical properties and microstructure of MgO-based expansive additive cement mortars[J]. Structural Concrete21(3): 1082–1092.
25.
QinTHanFYGuangJM, et al. (2021) Experimental study on mechanical properties of high performance concrete for railway bridges. J]. Concrete377: 134–136. (in Chinese).
26.
RossCAJeromeDMTedescoJW, et al. (1996) Moisture and strain rate effects on concrete strength[J]. ACI Material Journal93(3): 293–300.
27.
ShenPLuJXZhengHB, et al. (2020) Expansive ultra-high performance concrete for concrete-filled steel tube applications[J]. Cement and Concrete Composites114: 103813.
28.
ShuaiXL (2013) Mechanical Properties Experimental Study and Finite Element Analysis of Concrete under the Impact load[D]. Changsha: Hunan University. (in Chinese).
29.
SunCZ (2021) Study on Expansion Performance of MgO Expansive Cement Mortar under Different Constraint Conditions[D]. Taian: ShandongAgricultural University. (in Chinese).
30.
TedescoJWPowellJCRossCA, et al. (1997) A strain-rate-dependent concrete material model for ADINA[J]. Computers & Structures64(5/6): 1053–1067.
31.
WangYTLiuDSLiSLJiangYQ (2014) Dynamic performance of concrete based on a Φ75mm SHPB system under high temperature[J]. Journal of Vibration and Shock33(17): 12–17.
32.
WangTPXiaoSHZhangJ,et al. (2022) Depth-consistent models for probabilistic liquefaction potential assessment based on shear wave velocity. Bulletin of Engineering Geology and the Environment81(6): 1–14.
33.
XiaZSShaJFLiuJZ,et al. (2019) Experimental study on properties of low shrinkage and high adhesion black high performance concrete[J]. China Concrete and Cement Products12: 12–17. (in Chinese).
34.
XinYQ (2015) Analysis of compressive strength relationship between concrete cylinder specimen and cube specimen [J]. China Water Power and Electrification7: 59–62. (in Chinese).
35.
YooSWKwonSJSatoR, et al. (2012) Analysis technique for autogneous shrinkage in high performance concrete with mineral and chemical admixtures[J]. Construction and Building Materials34: 1–10.
36.
ZaichenkoMNazarovaAMarshdiQ (2014) Effect of expansive agent and shrinkage reducing admixture in shrinkage-compensating concrete under hot-dry curing environment[J]. Teka Commission of Motorization and Power Industry in Agriculture14(2): 170–178.
37.
ZhangPDaiYQWangWT, et al. (2020) Effects of magnesia expansive agents on the self-healing performance of microcracks in strain-hardening cement-based composites (SHCC)[J]. Materials Today Communications25: 101421.
38.
ZhaoHTLiuHWanY, et al. (2020) Mechanical properties and autogenous deformation behavior of early-age concrete containing pre-wetted ceramsite and CaO-based expansive agent[J]. Construction and Building Materials267(10): 120992.
39.
ZhongY S. (2006) Study on the Magnesia Concrete Expansion Additive of effect[D]. Nanjing: Nanjing University of Technology. (in Chinese).
40.
ZhouXQHaoH (2008) Modelling of compressive behaviour of concrete-like materials at high strain rate[J]. International Journal of Solids and Structures45: 4648–4661.
41.
ZhuBF (1999) Thermal Stresses and Temperature Control of Mass concrete[M]. Beijing: China Electric Power Press. (in Chinese).
