Evaluating LASER tracking for the improvement of quality control methods of precast concrete

Document Type

Article

Publication Date

8-1-2025

Abstract

Current quality control (QC) methods of precast concrete are dated and present challenges of human error and lengthy inspections. Current research into modernizing QC practices revolves around implementing laser scanners, with less focus on the possibility of using laser trackers. Laser trackers excel in basic dimensional analysis, making them a better alternative to laser scanners or traditional methods. Laser scanners require scans to be uploaded, which can be lengthy, while laser trackers allow for real-time measurement analysis. This study aims to evaluate the implementation of laser trackers into the QC process of precast concrete by comparing time and cost to the traditional method of using a tape measure. Time studies were performed in the pre-and post-pour of the precast concrete process at a precast concrete plant using the traditional laser tracker methods. The plant provided the time study data for the traditional methods, while the laser tracker data was collected by applying laser technology. The study's main findings indicate that using the laser tracker results in an 80% reduction for the pre-pour and a 38% reduction in the post-pour for QC processes compared to the traditional QC method. In addition, using the laser tracker results in an annual savings of $47,806 in labor costs. The laser tracker saves time by making the inspection process more efficient. In the post-pour process, multiple pieces were measured at once rather than one at a time. Additionally, the laser tracker is quicker than measuring by hand and removes potential human error by plotting a real-time point. These savings in time resulted in lower labor costs compared to the traditional method. Overall, this study shows that the laser tracker is quicker and cheaper as the inspections are streamlined, resulting in lower labor costs.

Publication Source (Journal or Book title)

Manufacturing Letters

First Page

1708

Last Page

1717

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