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Related Concept Videos

Vibrating Concrete01:19

Vibrating Concrete

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Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
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Preplaced Aggregate Concrete01:29

Preplaced Aggregate Concrete

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Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
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Manufacture of Concrete Masonry Units01:27

Manufacture of Concrete Masonry Units

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The process of manufacturing concrete masonry units begins by mixing stiff concrete composed of Portland cement, aggregates, and water. This mixture is then poured into metal molds. To ensure the concrete settles uniformly and to avoid separation of its components, the mixture in the molds is subjected to vibration. Shortly after, the still-wet blocks are removed from the molds and placed on racks.
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Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

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Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
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Masonry Curtain Walls01:20

Masonry Curtain Walls

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Masonry curtain walls employ brick or stone veneers supported by the building's structure to form an external cladding system that is both aesthetically appealing and functional. These walls are erected through two principal techniques, first by traditional layering of masonry units and second by using prefabricated panels. Traditional construction relies on steel shelf angles attached to the spandrel beam for support, with high-bond mortars ensuring secure attachment of masonry veneer...
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Placing Concrete01:17

Placing Concrete

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The concrete is placed as close as possible to its final position to avoid segregation. The placed concrete is then fully compacted to expel the entrapped air, and the next layer of concrete is laid while the underlying layer is still in the plastic state. The rate at which concrete is placed and compacted is kept equal.
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Deep-Learning-Based Automated Building Construction Progress Monitoring for Prefabricated Prefinished Volumetric

Wei Png Chua1, Chien Chern Cheah1

  • 1School of Electrical & Electronic Engineering, Nanyang Technological University, 50 Nanyang Ave, Singapore 639798, Singapore.

Sensors (Basel, Switzerland)
|November 9, 2024
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Summary
This summary is machine-generated.

Automated visual monitoring for Prefabricated Prefinished Volumetric Construction (PPVC) uses a novel window-based system. This WAVBCPM approach mimics human decision-making to accurately track construction progress despite visual data challenges.

Keywords:
computer visiondeep learningobject detectionprogress monitoring

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Area of Science:

  • Construction Management
  • Computer Vision
  • Building Information Modeling

Background:

  • Prefabricated Prefinished Volumetric Construction (PPVC) offers scheduling and resource management benefits.
  • Automating construction progress monitoring using visual data is desirable for efficiency.
  • Existing methods struggle with occlusions and incomplete data on complex sites.

Purpose of the Study:

  • To develop an automated visual building construction progress monitoring system (WAVBCPM) for PPVC projects.
  • To address challenges posed by occlusions and imaging constraints in construction site data.
  • To improve the accuracy and reliability of construction progress estimation.

Main Methods:

  • A novel 2D window-based system (WAVBCPM) is proposed, mimicking human monitoring.
  • The system employs a detection module using YOLOv5 for window identification and filtering.
  • Rectification and progress estimation modules handle missing data and refine progress assessment.

Main Results:

  • The WAVBCPM system effectively processes visual data from real construction sites.
  • It overcomes limitations of purely data-driven object detectors in complex environments.
  • Experimental results show higher accuracy in progress monitoring compared to existing methods.

Conclusions:

  • WAVBCPM offers an effective solution for automated PPVC construction progress monitoring.
  • Mimicking human inference enhances robustness against visual data imperfections.
  • The system provides a more accurate and reliable approach to tracking construction progress.