Large Area Concrete Surface Topography Measurements Using Optical 3D Scanner

Majchrowski, Radomir; Grzelka, M.; Wieczorowski, Michał; Sadowski, Łukasz; Gapiński, Bartosz

doi:10.1515/mms-2015-0046

Cited by 33 publications

(22 citation statements)

References 14 publications

(10 reference statements)

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“…The first step of the method is to identify the size of each pore and the second is to add up its surfaces. To do so, in general, five groups of pores are formed according to diameter (2,4,6,8, and 10 mm). To include the pores in one of the groups, it must be possible to inscribe it in the circumference of diameter of each group chosen and not belong to a smaller group (Figure 2).…”

Section: Qsi Methodsmentioning

confidence: 99%

“…There are several investigations [1][2][3][4][5][6][7][8][9][10], that developed methods of visual inspection and non-destructive tests. None of them, except the QSI method [3], is a simple method to be used in the work by a non-specialist operator.…”

Section: Introductionmentioning

confidence: 99%

“…Mention must be made the QSI [3] method proposes a simplified method to quantify the surface occupied by the pores in relation with the total surface inspected, analyzing groups of pores by their diameter. The three main advantages of the QSI method, with respect to other methods of the literature [4,8,15], is its simplicity in determining and quantifying the surface quality of concrete; it does not require high knowledge in digital processing, can be applied on curved surfaces, and even with different shades or surface spots. The QSI method can simplify quality control of surface finish in architectural concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Majchrowski et al [8] use an advanced three-dimensional (3D) scanner (topographic analysis) to analyze concrete surfaces.…”

Section: Introductionmentioning

confidence: 99%

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QSI Methods for Determining the Quality of the Surface Finish of Concrete

et al. 2018

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Abstract:The surface finish of a concrete element may become an index of its quality, relating the external and internal porosity with the mechanical and durability properties. Few methods are used to determine the surface quality of concrete elements. Mention must be made the Quality Surface Index (QSI) proposes a simplified method to quantify the surface occupied by the pores in relation with the total surface inspected, analyzing groups of pores by their diameter. The method of the CIB W29 (Commission W29 "Concrete Surface Finishings") proposes an inspection of the concrete element and its visual comparison with some standard templates. Finally, the digital processing of images allows the zones with surface defects to be delimited and quantified according to premises of quality introduced into the control software. These three methods are employed in this work and are applied in three concrete walls situated three meters from the observer (M-1, M-2 and M-3). Following the conversion of the results of the method with ImageJ and QSI, the results suppose differences that go from 0.1 tenths (2%) for M-3 up to 0.3 tenths (8%) for M-1. All values are within the obtained range with CIB W29 templates. This can validate the QSI and digital processing methods and allows a quick verification of the results. With the digital method, it is obtained that 23.5% of the total pores of M-1 have a diameter of less than 10 mm 2 and 44% of less than 100 mm 2 . For M-2 and M-3 the proportions of pores with a dimension below 10 mm 2 is of 43.1% and 27.7%, respectively, and that 77.5% and 60.7% are smaller than 100 mm 2 . From all the above it can be highlighted that M-1 is the one with the lowest amount of pores, however the proportion of the largest is greater than for M-2 and M-3. In the case of M-3, although it has a lower proportion of larger pores than M-1, its greater amount means it is the worst in terms of surface finish of the three.

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Section: Qsi Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Majchrowski et al [8] use an advanced three-dimensional (3D) scanner (topographic analysis) to analyze concrete surfaces.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

QSI Methods for Determining the Quality of the Surface Finish of Concrete

et al. 2018

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“…Accuracy parameters of these systems assure metrologically correct measurement results, while their flexibility makes it possible to map even very complicated free form surfaces. Photogrammetry itself can be defined as a method to obtain three dimensional data about shape and location of objects basing on one or many two dimensional images [3,4,5]. In length and angle metrology while measuring geometric features of workpieces, photogrammetry means measurement of clearly coded characteristic elements on objects.…”

Section: Static and Dynamic Photogrammetrymentioning

confidence: 99%

The use of modern measurement techniques for designing pro ecological constructions

Wieczorowski

Gapiński

Szymański³

et al. 2017

E3S Web Conf.

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Abstract. In the paper some possibilities of application modern length and angle metrology techniques to design constructions that support ecology were presented. The paper is based on a project where a lighter bus and train car seat was developed. Different options were presented including static and dynamic photogrammetry, computed tomography and thermography. Research related with dynamic behaviour of designed structures gave input to determine deformation of a seat and passengers sitting on it during communication accidents. Works connected to strength of construction elements made it possible to optimize its dimensions maintaining proper durability. Metrological actions taken in relation to production machines and equipment enabled to better recognize phenomena that take place during manufacturing process and to correct its parameters, what in turns also contributed to slim down the construction.

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