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Formwork block Wall: 3D Grid Over a Void, 24 Crossing Profiles

Formwork block Wall: 3D Grid Over a Void, 24 Crossing Profiles

Description

3D grid recorded on a concrete formwork block wall with a GSSI FLEX NX dual-antenna system. Twenty-four profiles: nine horizontal lines spaced 20 cm apart, run from bottom to top, and fifteen vertical lines spaced 25 cm apart, run from left to right. The wall thickness was verified on site at 20 cm.

A hollow-block wall is void by design: its cells receive the infill concrete, and a poorly filled cell leaves a void inside the structure. This is a common workmanship defect, invisible at the surface, and it compromises the load-bearing capacity of the element.

The void is clearly visible here, and its signature reads on both scan directions — which is precisely what separates it from an artefact: a real anomaly persists when the orientation changes, an artefact does not.

For C-scan reconstruction, the crossing grid, regular and documented, allows plan views to be rebuilt at different depths. The known thickness calibrates the scale, and the void can be followed from one slice to the next.

For automated processing. Twenty-four profiles of a single structure, in two directions, form a coherent set for testing automatic picking of reinforcement or cavities across a whole element rather than on an isolated line.

Raw unprocessed files.

blocs à bancher, insulating concrete form, ICF, agglomérés creux, hollow blocks, alvéole non remplie, unfilled cell, défaut de remplissage, incomplete infill, vide, void, cavité, cavity, mur porteur, load-bearing wall, défaut d'exécution, workmanship defect, grille 3D, 3D grid, profils croisés, crossing profiles, DIRX, DIRY, maillage, survey grid, reconstruction C-scan, C-scan reconstruction, coupe horizontale, time slice, vue en plan, plan view, pointé automatique, automated picking, apprentissage automatique, machine learning, détection de cavités, void detection, épaisseur vérifiée, verified thickness, FLEX NX, double antenne, dual antenna

Information

ApplicationConcrete / Civil Eng.
GSSI antennaFLEX NX
Frequency2500 MHz
FormatDZT
Size144 MB
Files24
Channels2
ContributorMDSLab
Added on2026-10-07
Ground truth Partial measured wall thickness, 20 cm

Cite this dataset

APA

MDS - Le Matériel de Sondage - GPRbase (2026). Formwork block Wall: 3D Grid Over a Void, 24 Crossing Profiles [Data set]. GPRbase. GSSI, FLEX NX, 2500 MHz. https://www.gprbase.com/en/dataset/ds038-formwork-block-wall-3d-grid-over-a-void-24-crossing-profiles/

BibTeX

@misc{gprbase_ds038,
  author       = {MDS - Le Matériel de Sondage - GPRbase},
  title        = {Formwork block Wall: 3D Grid Over a Void, 24 Crossing Profiles},
  year         = {2026},
  publisher    = {GPRbase},
  howpublished = {\url{https://www.gprbase.com/en/dataset/ds038-formwork-block-wall-3d-grid-over-a-void-24-crossing-profiles/}},
  note         = {GSSI, FLEX NX, 2500 MHz. Licensed under CC BY-NC-SA 4.0},
}

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