Study on the breaking process and damage characteristics of abrasive water jet impacting concrete based on acoustic emission

Li, Jialiang; Du, Shujian; Xue, Yongzhi

doi:10.1016/j.conbuildmat.2020.120085

Cited by 19 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Paola et al 8 investigated the microscopic damage mechanisms of AWJ used to destroy rock surfaces. Liu et al 9 studied the damage characteristics of concrete specimens impacted by AWJ.…”

Section: Introductionmentioning

confidence: 99%

Breaking mechanism and damage evolution rule of abrasive water jet impacting reinforced concrete

Liu

Ling

et al. 2023

Structural Concrete

Self Cite

View full text Add to dashboard Cite

As time passes, a significant number of reinforced concrete (RC) constructions will require maintenance and transformation. RC repair and renovation often require localized crushing and removal of the distressed area. Abrasive water jet (AWJ) crushing RC has significant advantages in terms of safety, environmental protection, and quality. However, AWJ works with high specific energy consumption and the effective crushing range of the jets is small, and the key to solving these problems lies in an in‐depth study of the general destructive law and cracking mechanism of RC materials under the action of high‐speed liquid impact. Therefore, this thesis focuses on the above key scientific issues, combining mechanical impact tests, smooth particle hydrodynamics numerical simulation methods and computer tomography scans techniques to carry out systematic research. Through the study, it is found that: The fracture characteristics of RC are mainly reflected in crushing pits and cracks, which will produce macrocracks extending along the reinforcement on the side of RC. AWJ impacting RC is mainly divided into three stages: crater formation, upper concrete fragmentation, and concrete damage development in the reinforcement impact area. During the whole impact process, the shear stress, compressive stress and tensile stress of the reinforcement will change continuously with the increase of the impact time of the AWJ.

show abstract

“…Paola et al 8 investigated the microscopic damage mechanisms of AWJ used to destroy rock surfaces. Liu et al 9 studied the damage characteristics of concrete specimens impacted by AWJ.…”

Section: Introductionmentioning

confidence: 99%

Breaking mechanism and damage evolution rule of abrasive water jet impacting reinforced concrete

Liu

Ling

et al. 2023

Structural Concrete

Self Cite

View full text Add to dashboard Cite

show abstract

“…At the same time, this technology also shows great advantages due to the advantages of environmental protection and safety, small disturbance, high efficiency, and flexibility. 8 However, with the in-depth application of its technology, the hydraulic impact technology still has the problem of low energy utilization.…”

Section: Introductionmentioning

confidence: 99%

Study on unit energy damage and prediction model of concrete under hydraulic impact

Zhu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

View full text Add to dashboard Cite

Based on the SPH-FEM (Smoothed Particle Hydrodynamics – Finite Element Method) coupling method, the hydraulic impact concrete model was established, and the numerical model was verified by hydraulic impact concrete experiments and CT (Computed Tomography) scanning experiments. Secondly, this paper proposes the comprehensive damage factor of unit energy consumption, and explores the damage law of unit energy consumption of concrete under different parameters and optimizes the hydraulic parameters by using image processing techniques. Finally, this paper analyzes the crushing process of concrete under hydraulic impact, and predicts the unit energy consumption comprehensive damage by the multiple linear regression model, the decision tree model and the GBDT (Gradient Boosting Decision Tree) model. The results show that the effects of different parameters on the comprehensive damage of unit energy consumption of hydraulic impact concrete changes in stages, and the concrete particles will completely fail when the concrete damage under hydraulic action accumulates to a certain degree and the von mises stress reaches a certain peak. Secondly, the prediction of the GBDT model is the best, and the study provides a theoretical basis and technical reference for the efficient and economic utilization of hydraulic impact concrete technology.

show abstract

Acoustic Emission and Failure Characteristics of Shales with Different Brittleness Under AWJ Impingement

Huang

et al. 2022

Rock Mech Rock Eng

View full text Add to dashboard Cite

Study on the breaking process and damage characteristics of abrasive water jet impacting concrete based on acoustic emission

Cited by 19 publications

References 14 publications

Breaking mechanism and damage evolution rule of abrasive water jet impacting reinforced concrete

Breaking mechanism and damage evolution rule of abrasive water jet impacting reinforced concrete

Study on unit energy damage and prediction model of concrete under hydraulic impact

Acoustic Emission and Failure Characteristics of Shales with Different Brittleness Under AWJ Impingement

Contact Info

Product

Resources

About