Visual monitoring method on fresh concrete vibration

Tian, Zhenghong; Bian, Ce

doi:10.1007/s12205-013-0475-x

Cited by 18 publications

(11 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The density-based segregation index, SIDEN, was calculated for each specimen to evaluate its level of segregation in accordance with the methodology outlined by Ahmed and Punkki [20]. SIDEN is defined as the standard deviation of the densities of 10 sawn discs from each specimen.…”

Section: Segregation Analysismentioning

confidence: 99%

“…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%

“…Tian and Bian [20] devised a method for tracking vibration location and duration, which relied on a global positioning system paired with a real-time kinematics measuring mode. Similarly, Gong et al [4] tracked the motion of vibrators using ultrawideband tags and recorded the vibration duration from real-time logging data.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Surface Bubbles Emergence as an Indicator for Optimal Concrete Compaction

Ahmed,

Punkki

2024

Materials

View full text Add to dashboard Cite

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.

show abstract

Section: Segregation Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surface Bubbles Emergence as an Indicator for Optimal Concrete Compaction

Ahmed,

Punkki

2024

Materials

View full text Add to dashboard Cite

show abstract

“…Research shows [49][50][51]: GPS combined with construction quality dynamic information (PDA) real-time acquisition technology has greatly improved the work efficiency of traditional vibrating monitoring methods, meeting the needs of real-time precise positioning of vibrating area locations, and improving vibrating trajectory. Prediction planning, remote control of vibration information requirements, and intelligent feedback provide corresponding technical support for real-time monitoring of vibration construction.…”

Section: Real-time Positioning Of Vibrating Constructionmentioning

confidence: 99%

“…Machine learning and artificial neural networks are used to automatically process monitoring data, and analyze various parameters of vibrating to obtain realtime evaluation of vibrating quality, but the system can only be used in laboratory scale at present. Tian [50] developed a visual monitoring system for the vibrating state of concrete, which can locate the vibrating state of fresh concrete in real time and quantitatively evaluate the defects in the vibrating process. Dong [55] proposed a real-time monitoring method for the vibration quality of fresh concrete.…”

Section: Concrete Vibration Monitoring Systemmentioning

confidence: 99%

Research Progress of concrete Vibratory Technology

Li¹,

Wu²,

Zhang³

et al. 2022

AJST

View full text Add to dashboard Cite

Traditional vibrating equipment and technology combined with manual experience to judge the quality of concrete vibrating is highly subjective and poorly standardized. Due to under-vibration, over-vibration and leakage vibration, the concrete has defects such as holes, segregation and cracks, which lead to the pouring quality not meeting the design requirements. The research progress of vibrating technology is introduced from four aspects: parameters affecting vibrating quality, evaluation method of vibrating quality, key technologies and development trends of vibrating. The research shows that intelligent vibrating has a significant role in promoting the development of civil engineering construction, and also lays a good foundation for the development of related engineering equipment and vibrating machinery automation.

show abstract

Automated monitoring and warning solution for concrete placement and vibration workmanship quality issues

Lee

Skibniewski

2022

AI Civ. Eng.

View full text Add to dashboard Cite

Placing and vibrating concrete are vital activities that affect its quality. The current monitoring method relies on visual and time-consuming feedbacks by project managers, which can be subjective. With this method, poor workmanship cannot be detected well on the spot; rather, the concrete is inspected and repaired after it becomes hardened. To address the problems of retroactive quality control measures and to achieve real-time quality assurance of concrete operations, this paper presents a monitoring and warning solution for concrete placement and vibration workmanship quality. Specifically, the solution allows for collecting and compiling real-time sensor data related to the workmanship quality and can send alerts to project managers when related parameters are out of the required ranges. This study consists of four steps: (1) identifying key operational factors (KOFs) which determine acceptable workmanship of concrete work; (2) reviewing and selecting an appropriate positioning technology for collecting the data of KOFs; (3) designing and programming modules for a solution that can interpret the positioning data and send alerts to project managers when poor workmanship is suspected; and (4) testing the solution at a certain construction site for validation by comparing the positioning and warning data with a video record. The test results show that the monitoring performance of concrete placement is accurate and reliable. Follow-up studies will focus on developing a communication channel between the proposed solution and concrete workers, so that feedbacks can be directly delivered to them.

show abstract

Visual monitoring method on fresh concrete vibration

Cited by 18 publications

References 8 publications

Surface Bubbles Emergence as an Indicator for Optimal Concrete Compaction

Surface Bubbles Emergence as an Indicator for Optimal Concrete Compaction

Research Progress of concrete Vibratory Technology

Automated monitoring and warning solution for concrete placement and vibration workmanship quality issues

Contact Info

Product

Resources

About