Experimental and numerical studies on dynamic compressive behavior of reactive powder concretes

Wang, Yonghua; Wang, Zhengdao; Liang, Xin; An, Minzhe

doi:10.1007/s10338-008-0851-0

Cited by 90 publications

(21 citation statements)

References 26 publications

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“…The hydrostatic pressure is influenced by the inertial pressure. As explained by Wang (2007), specimens will stretch under dynamic tensile impact loading, the radial deformation of specimens will happen due to Poisson's effect, and thus radial stress will generate in the opposite direction of radial deformation because of inertia effect. Therefore, specimens are in the triaxial stress state and the hydrostatic pressure will increase.…”

Section: Parameters Of Numerical Simulationsmentioning

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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Section: Parameters Of Numerical Simulationsmentioning

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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“…Tai as well asYonghua Wangconducted an experimental investigation on the dynamic mechanical properties of the RPC using Split Hopkinson pressure bar (SHPB) testing; for different fractions of fiber and different strain rate. The results show the obvious rate-dependent mechanical behaviour exists for RPC [22,23]. Tai compared his results with that of Grote [24] who conducted a mortar experiment.…”

Section: Compressive Stress -Strain Relationshipmentioning

confidence: 91%

“…Yonghua Wang considered two types of pulse shapers with different thicknesses to reduce the highfrequency-oscillation effect and achieve a nearly constant strain rate. He differentiated contribution of effects of the hydrostatic stress and strain rate for calculating the apparent dynamic strength enhancement [23]. Zhang Yunsheng carried dynamic testing to investigate the dynamic tensile behaviour of the C200 GRPC through the SHPB.…”

Section: Compressive Stress -Strain Relationshipmentioning

confidence: 99%

A State of the Art Report on Ultra High Performance Concrete: Reactive Powder Concrete

Bhusari¹,

S²

2017

IOSR JEN

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Abstract:-There has been continuous demand for materials with higher compressive strength for various civil engineering applications. Reactive powder concrete (RPC) has been developed to overcome the weakness of most high strength concrete available with compressive strength in the range of 60-100 MPa. RPC was developed from a special combination of constituent materials such as Portland cement, silica fume, quartz flour, fine silica sand, high-range water-reducer, water and steel fibers wherein attempts have been made to remove the coarse aggregate particles to make a very strong mortar with a very low water cement ratio. This paper presents a state of the art report reviewing the research in the area of the development of RPC, highlighting the enhanced performance in the mechanical properties of RPC in direct application of its use in structural members requiring high standards of strength coupled with superior performance and durability.

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“…Compared to the ordinary and high strength concrete, the following impressive advantages of mechanical properties of UHPC have been proved (Richard and Cheyrezy 1995;Wang et al 2008;Zhang et al 2008;Tai 2009;Yang et al 2009): ultra high compressive strength, high tensile strength and ductility by adding special fibers, outstanding abilities to absorb energy and resist impulsive loading by incorporating high volume fraction of steel fibers. Yang et al (2009) compared the mechanical properties by using aggregates of silica sand, 2 types of local natural sand, and recycled glass cullet.…”

Section: Introductionmentioning

confidence: 99%

Properties of Ultra High Performance Concrete Containing Superfine Cement and without Silica Fume

Xiao

Deng

Shen³

2014

ACT

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To avoid the disadvantages caused by using silica fume, by using superfine cement (SC) to substitute silica fume, a new kind of ultra high performance concrete (SC-UHPC) was prepared and introduced. The influence of component types and dosages on the mechanical properties of SC-UHPC was investigated. The results show that 40% ground granulated blast furnace slag (GGBFS) or 10% fly ash (FA) & 30% GGBFS replacing SC are the most appropriate proportions to get high strength with satisfied workability and low cost. A suitable amount of defoaming agent (DA) in superplasticizer (SP) effectively reduced the void ratio in the UHPC. To optimize the strength and fluidity, the rational natural sand distribution with lowest clay particles amount can be used. The small sized steel fibers added into the mixture effectively improved the flexural behavior of SC-UHPC. Multiple nonlinear analysis show that, with sufficient calcium silicate hydrate (C-S-H gel) and enough mixture fluidity, the compressive strength of UHPC is closely related to the water to binder ratio and void ratio, and increases linearly with the incremental fiber amount. Microstructure analysis proved that the microstructure of SC-UHPC has ultra high density and homogeneity.

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Experimental and numerical studies on dynamic compressive behavior of reactive powder concretes

Cited by 90 publications

References 26 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

A State of the Art Report on Ultra High Performance Concrete: Reactive Powder Concrete

Properties of Ultra High Performance Concrete Containing Superfine Cement and without Silica Fume

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