Numerical simulation of influence of coarse aggregate crushing on mechanical properties of concrete under uniaxial compression

Liu, Manman; Wang, Fangtong

doi:10.1016/j.conbuildmat.2022.128081

Cited by 22 publications

(5 citation statements)

References 49 publications

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“…13,14 Keep the maximum particle size of coarse aggregate unchanged, with the increase of the minimum particle size of coarse aggregate, the peak stress of concrete is gradually smaller, keep the minimum particle size of coarse aggregate 5 mm unchanged, with the increase of the maximum particle size of coarse aggregate, the peak stress of concrete is increased first and then weakened. 15 The findings indicate that the shape of the stressstrain curve of recycled concrete is similar to that of natural concrete, 16 and the replacement rate of recycled coarse aggregate has little effect on the failure mode of recycled concrete under compression, but the mechanical properties of recycled concrete will change with the replacement rate. [17][18][19][20] The compressive properties of recycled concrete with different replacement rates of recycled coarse aggregates were investigated.…”

Section: Introductionmentioning

confidence: 97%

“…30 The results show that the peak stress of concrete increases with the increase of strain rate, which has obvious rate effect. 15 Numerical simulation of uniaxial dynamic compression test of recycled concrete specimens was carried out by using the method of base surface force element. Under the condition of strain rate, the rate effect of stress-strain curve of recycled concrete specimens was mainly reflected in the stage from the beginning of loading to the full development of cracks.…”

Section: Introductionmentioning

confidence: 99%

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Size effect on dynamic compressive failure mode and mechanical properties of recycled concrete

Liu

Gao

Luan

et al. 2023

Structural Concrete

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In order to study the size effect behavior of recycled concrete under dynamic compression load, a meso‐scale model of recycled concrete was established. The particle size of coarse aggregate, replacement ratio of recycled coarse aggregate, and section size were used as parameters to explore the mechanical properties of recycled concrete under uniaxial dynamic compression load, such as failure mode, compressive strength, peak strain, and residual strength. The effects of strain rate, particle size of recycled coarse aggregate, and replacement rate of recycled coarse aggregate on the size effect of dynamic compression of recycled concrete were further analyzed. The results showed that under uniaxial dynamic compression load, the damage degree of recycled concrete deep and along with the change of the strain rate change, recycled concrete dynamic compression strength and strain rate were positively correlated. There is the critical strain rate is 1/s, which weaken the influence of the size effect, when the strain rate reaches 10/s, the dynamic compressive strength of recycled concrete increases with the increase of section size. At the same time, when the strain rate is high, the particle size of recycled coarse aggregate and the replacement rate of recycled coarse aggregate have little effect on the size effect behavior of recycled concrete.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Size effect on dynamic compressive failure mode and mechanical properties of recycled concrete

Liu

Gao

Luan

et al. 2023

Structural Concrete

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“…These approaches assess factors like aggregate shape 17 , surface texture 18 , and the strength of the interface transition zone (ITZ) between coarse aggregate and mortar 19,20 . They also examine the in uence of aggregate strength on concrete's compressive strength 19,21 . Research modeling concrete as a two-phase structure-comprising a mortar matrix and coarse aggregates-reveals that under applied loads, heterogeneous stress leads to crack formation around the aggregates.…”

Section: Introductionmentioning

confidence: 99%

Critical influence of aggregate types on the compressive strength of concrete

Maruyama,

Sugimoto

2024

Preprint

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Understanding the role of aggregates in the compressive strength of brittle composites is crucial for optimizing construction material usage. In this study, we employed the rigid-body-spring-network model to determine the compressive strengths of both coarse aggregate and mortar in concrete. Through uniaxial compression loading tests on concrete, considering Young’s modulus and compressive strength of the coarse aggregate as variables, we elucidated the mechanism by which the coarse aggregate’s physical properties influence concrete's compressive strength, illustrated using a straightforward diagram. When the coarse aggregate’s Young's modulus is lower than that of the mortar, the stress transfer path within the mortar bends and cracks more rapidly, significantly lowering strength. Conversely, if the coarse aggregate’s Young’s modulus exceeds that of the mortar, stress becomes concentrated in the aggregate. Considering these aspects, the compressive strength of concrete can be optimized by changing the properties of the mortar according to the properties of the aggregates.

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“…How to choose the appropriate aggregate grading according to the actual demand to obtain the best concrete performance has become the focus of engineers. However, there are still many controversies and uncertainties about the impact of the performance of aggregate grade paired concrete [1] . Some studies have shown that the optimization of aggregate grading can significantly improve the mechanical properties and durability of concrete, while others show that the effect of aggregate grading is not significant and may even lead to a decrease in concrete performance in some cases.…”

Section: Introductionmentioning

confidence: 99%

Comparative study on the mechanical properties of different graded concrete aggregate

2024

jmpd

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This paper aims to study the mechanical properties of different graded concrete aggregates and discuss the influence of graded concrete performance. Through the literature review, the research status of concrete aggregate gradation at home and abroad is summarized, and the shortcomings of the existing studies are summarized. On this basis, a variety of graded aggregates are selected to prepare concrete specimens, and their mechanical properties are tested, including compressive strength, folding strength and other indexes. The experimental results show that the mechanical properties of different graded concrete aggregate are significantly different, and the strength and deformation of graded matched concrete have important influence. Some graded types of concrete show high strength and stability, while others may decline. Through comparative analysis, this paper summarizes the advantages and disadvantages of various graded types, and puts forward suggestions to optimize the concrete aggregate grading. These suggestions help to more reasonably select and use concrete aggregate in practical engineering and improve the performance and quality of concrete. This study is of great significance for promoting the development and application of concrete technology, and also provides a valuable reference for future research.

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Numerical simulation of influence of coarse aggregate crushing on mechanical properties of concrete under uniaxial compression

Cited by 22 publications

References 49 publications

Size effect on dynamic compressive failure mode and mechanical properties of recycled concrete

Size effect on dynamic compressive failure mode and mechanical properties of recycled concrete

Critical influence of aggregate types on the compressive strength of concrete

Comparative study on the mechanical properties of different graded concrete aggregate

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