Vibration quality evaluation of reinforced concrete using energy transfer model

Li, Jiajie; Tian, Zhenghong; Yu, Xin; Xiang, Junzheng; Fan, Haoyue

doi:10.1016/j.conbuildmat.2023.131247

Cited by 8 publications

(3 citation statements)

References 32 publications

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“…The subjectivity involved in onsite decisions about when to stop compaction underlines a crucial challenge in concrete quality control. In response, many researchers attempted to develop new methods to objectively track or evaluate the compaction of fresh concrete [1,3,4,[17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Li et al [18] evaluated the quality of vibration based on the distribution of vibration energy in fresh concrete. Furthermore, Li et al [19] developed the method to incorporate the influence of variables like aggregate proportion and rebar spacing on energy distribution and absorption, enhancing the precision of the vibration quality assessment in reinforced concrete. However, the two methods rely on energy thresholds determined by mathematical calculations and previous experiments.…”

Section: Introductionmentioning

confidence: 99%

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Surface Bubbles Emergence as an Indicator for Optimal Concrete Compaction

Ahmed,

Punkki

2024

Materials

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Compaction quality significantly influences the strength and durability of concrete in structures. Under-compacting can retain entrapped air, reducing strength, while over-compacting can lead to segregation, creating local variances in strength distribution and modulus of elasticity in the concrete structure. This study examines the widely adopted concept that compaction is optimal when bubbles cease to emerge on the concrete surface. We recorded the surface activity of six comparable concrete specimens during the compaction process using a 4K video camera. Four specimens were compacted using a table vibrator and two with a poker vibrator. From the video frames, we isolated the bubbles for analysis, employing digital image processing techniques to distinguish newly risen bubbles per frame. It was found that the bubbles continuously rose to the surface in all specimens throughout the compaction process, suggesting a need for extended compaction, with some specimens showing a slow in the rate of the bubbles’ emergence. However, upon examining the segregation levels, it was discovered that all the specimens were segregated, some severely, despite the continued bubble emergence. These findings undermine the reliability of using bubble emergence as a principle to stop compaction and support the need for developing online measurement tools for evaluating compaction quality.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface Bubbles Emergence as an Indicator for Optimal Concrete Compaction

Ahmed,

Punkki

2024

Materials

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“…With the advent of the smart construction era, the current frontier in concrete vibration construction research is to objectively evaluate the quality of vibration using digital methods and a variety of Internet of Things (IoT) sensors [7]. The monitoring data of concrete vibration are fundamental for further research, such as assessing the degree of compaction [8] and modeling the distribution of aggregates within the concrete [9].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Monitoring of Concrete Vibration Depth Based on RFID Scales

Quan,

Wang,

Liu

et al. 2024

Buildings

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The vibration of concrete is a typical concealed construction process, in which mature supervisory methods are lacking. The quality of vibration relies heavily on the subjective experience and sense of responsibility of the vibration operators. For the widely used hand-held concrete vibrators, existing methods for monitoring the quality of vibration primarily focus on the horizontal positioning of the vibrator. Due to the limited measurable range of vibration depth, these methods are inapplicable for monitoring the vibration depth during the vibration of deeper structures such as walls, columns, and large volumes of concrete. This paper makes the initial attempt to address the issue of monitoring concrete vibration depth, presenting a method that broadens the measurable range of depth in vibration monitoring. Inspired by the principles of optical and magnetic scales, this paper introduces a radio frequency identification (RFID) scales positioning system for the real-time monitoring of vibration depth. The proposed RFID scales vibration depth monitoring method theoretically has no upper limit on the measurable vibration depth, rendering it applicable to monitoring vibration depth of any extent. By comparing the positioning accuracy of different RFID scales hardware compositions, the optimal RFID scales hardware composition and the most effective RFID scales positioning algorithm were identified. The feasibility and accuracy of the vibration depth monitoring method based on RFID scales were validated through engineering field application. This method achieves centimeter-level accuracy in monitoring vibration depth, offers a tool for the precise control of vibration depth, and helps avoid potential quality issues in vibration.

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Machine learning-based classification of quality grades for concrete vibration behaviour

Fan,

He,

et al. 2024

Automation in Construction

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Vibration quality evaluation of reinforced concrete using energy transfer model

Cited by 8 publications

References 32 publications

Surface Bubbles Emergence as an Indicator for Optimal Concrete Compaction

Surface Bubbles Emergence as an Indicator for Optimal Concrete Compaction

Real-Time Monitoring of Concrete Vibration Depth Based on RFID Scales

Machine learning-based classification of quality grades for concrete vibration behaviour

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