Dynamic compressive behavior of recycled aggregate concrete based on split Hopkinson pressure bar tests

Lu, Yao

doi:10.1590/s1679-78252014000100008

Cited by 37 publications

(12 citation statements)

References 7 publications

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“…Cai et al (2015) systematically conducted quasi-static and dynamic compressive tests to analyze the rate effect of granite, and numerical simulation method is employed to determine the true rate effect of granite through the uncoupled assumption of the rate effect, lateral inertia and end friction effect in SHPB tests. Lu et al (2014) investigated the dynamic compressive behavior of recycled aggregate concrete specimens prepared with five different amount of recycled coarse aggregate [i.e. 0, 25%, 50%, 75%, and 100%], and the results show that recycled aggregate concrete exhibits strong rate dependency.…”

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confidence: 99%

Further Investigation on the Real Rate Effect of Dynamic Tensile Strength for Concrete-Like Materials

Zhang

Chen

et al. 2016

Lat. Am. j. solids struct.

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Based on dynamic direct tensile tests, splitting tests and spalling tests, it is found that the experimental tensile strength of concrete-like materials greatly increases with loading-rate. This kind of dynamic tensile strength enhancement may be caused by the combination influence of the inertia effect, real rate effect and end friction effect (here the end friction effect is only existed in splitting and spalling tests). To further investigate the influence degree of real rate effect for concrete-like materials in dynamic tensile tests, this paper conducts systematically dynamic tensile experiments, viz. dynamic direct tensile tests, splitting tests and spalling tests. At the same time, numerical dynamic tensile tests are employed to analyze the mechanical characteristics of concrete-like materials. A hydrostatic pressure dependent model, the DruckerPrager constitutive model, is used for concrete-like material specimens, which can consider the influence of inertia effect. In the numerical model, the specimen is set to be rate-independent, thus the predicted dynamic tensile strength of specimens is free of the real rate effect. The end friction effect is also taken into account in the numerical analysis of dynamic splitting and spalling tests. It is found that the dynamic tensile strength of concrete-like materials in numerical simulations does not varies obviously with the loading-rate, indicating that the inertia effect and end friction effect have little contributions to the dynamic tensile strength enhancement of concrete-like materials. Therefore, the real rate effect dominates the dynamic tensile strength enhancement of concretelike materials in laboratory tests, but the inertia effect and end friction effect do not. Keywords Real rate effect, tensile strength, concrete-like materials, experimental and numerical research researchers. The dynamic behavior of concrete-like materials is usually studied by laboratory such as split Hopkinson tension bar (SHTB) or split Hopkinson pressure bar (SHPB). Many experimental results show that the dynamic strength of concrete-like materials subjected to impact loading increases apparently with the loading-rate. The influence of the loading-rate or strain-rate on the dynamic strength enhancement of concrete-like materials obtained from experiments is called as the apparent rate effect. The dynamic performance of mortar under compressive and tensile loading was studied by Yang et al. (2015) based on splitting tests, and the results show that mortar is of rate sensitive. Cai et al. (2015) systematically conducted quasi-static and dynamic compressive tests to analyze the rate effect of granite, and numerical simulation method is employed to determine the true rate effect of granite through the uncoupled assumption of the rate effect, lateral inertia and end friction effect in SHPB tests. Lu et al. (2014) investigated the dynamic compressive behavior of recycled aggregate concrete specimens prepared with five different amount of recycled coarse aggregate [i.e. 0, 25...

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confidence: 99%

Further Investigation on the Real Rate Effect of Dynamic Tensile Strength for Concrete-Like Materials

Zhang

Chen

et al. 2016

Lat. Am. j. solids struct.

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“…where is dynamic strain rate, is static strain rate which equal to 30 In the present study, the dynamic increase factor curves of the experimental test were extended behind the strain rate of 30 s -1 until the static condition when the DIF is equal to 1. The experimental dynamic increase factors of both concrete types under temperatures of 25, 400, and 700 o C were compared with the results of the recommended expressions of dynamic increase factor as described in Fig.…”

Section: Compressive Strength and Dynamic Increase Factor Difmentioning

confidence: 99%

Dynamic Properties of High Volume Fly Ash Nanosilica (HVFANS) Concrete Subjected to Combined Effect of High Strain Rate and Temperature

Mussa

Mutalib

Hamid

et al. 2018

Lat. Am. j. solids struct.

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The study aims to determine the dynamic properties of high volume fly ash nanosilica HVFANS concrete exposed to strain rates between 30.12 to 101.42 s-1 and temperatures of 25, 400, and 700 o C by using split Hopkinson pressure bar SHPB machine. The static and dynamic compressive strengths of HVFANS concrete were slightly lower than plain concrete PC at room temperature, while its values were higher at 400 and 700 o C. The results proved that the CEB model of dynamic increase factor is more reliable to estimate the behaviour of HVFANS concrete at studied temperatures. The toughness, critical strain, and damage of HVFANS concrete recorded a superior performance than PC under studied strain rates and temperatures that would reflect the possibility of use HVFANS concrete in structures to improve its resistant of fire and impact loads, as well as to decrease the demand on Portland cement which could lead to restrict the risks of liberated gases during cement production. Furthermore, equations were proposed to estimate the dynamic increase factor, toughness, and critical strain of both concretes under investigated conditions.

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“…Several studies emphasised the mechanical behaviour of RAC under the effect of strain rate. Researchers [15][16][17][18][19] found that elastic modulus and peak stress increase as strain rate increases. Moreover, the strain rate sensitivity of elastic modulus and peak stress of RAC are more remarkable than those of RAC with carbonated RAC due to the Stefan effect [19].…”

Section: Introductionmentioning

confidence: 99%

Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State

Wang

et al. 2019

Advances in Materials Science and Engineering

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This study aims at determining the effect of water pressure on the mechanical properties of concrete subjected to freeze-thaw (F-T) attack under the dynamic triaxial compression state. Two specimens were used: (1) a 100 mm × 100 mm × 400 mm prism for testing the loss of mass and relative dynamic modulus of elasticity (RDME) after F-T cycles and (2) cylinders with a diameter of 100 mm and a height of 200 mm for testing the dynamic mechanical properties of concrete. Strain rates ranged from 10−5·s−1 to 10−3·s−1, and F-T cycles ranged from 0 to 100. Three levels of water pressure (0, 5, and 10 MPa) were applied to concrete. Results showed that as the number of F-T cycles increased, the mass loss rate of the concrete specimen initially decreased and then increased, but the RDME decreased. Under 5 MPa of water pressure and at the same strain rate, the ultimate compressive strength decreased, whereas the peak strain increased with the increase in the number of F-T cycles. This result is contrary to the variation law of ultimate compressive strength and peak strain with the increase in strain rate under the same number of F-T times. With the increase in F-T cycles or water pressure, the strain sensitivity of the dynamic increase factor of ultimate compressive strength and peak strain decreased, respectively. After 100 F-T cycles, the dynamic compressive strength under all water pressure levels tended to increase as the strain rate increased, whereas the peak strain decreased gradually.

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Dynamic compressive behavior of recycled aggregate concrete based on split Hopkinson pressure bar tests

Cited by 37 publications

References 7 publications

Further Investigation on the Real Rate Effect of Dynamic Tensile Strength for Concrete-Like Materials

Further Investigation on the Real Rate Effect of Dynamic Tensile Strength for Concrete-Like Materials

Dynamic Properties of High Volume Fly Ash Nanosilica (HVFANS) Concrete Subjected to Combined Effect of High Strain Rate and Temperature

Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State

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