Quantification and mapping of deterioration patterns on granite surfaces by means of mobile LiDAR data

Pozo-António, J.S.; Puente, Iván; Pereira, M.F.C.; Rocha, C.S.A.

doi:10.1016/j.measurement.2019.03.066

Cited by 16 publications

(10 citation statements)

References 36 publications

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“…Currently, the use of laser technology in buildings diagnostics and geometry measuring is gaining interest but is still not as popular due to equipment costs. Several studies have applied TLS scanning in material diagnostics [25][26][27][28]. TLS scanning is also used for analysing deflections in construction [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Use of TLS (LiDAR) for Building Diagnostics with the Example of a Historic Building in Karlino

2020

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This article presents the use of TLS (LiDAR) measurement for the evaluation of the technical conditions of a historic building. A FARO M70 laser scanner was used in the study. The measurements was taken as an RCP point cloud. The measurement allowed to partially determine the cause of the building damage. The performed measurement allows to propose a precise solution that could be pre-fabricated. The study shows the usefulness of TLS in building diagnostics. Improper measurement could lead to a wrong solution and a certain degree of uncertainty.

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Section: Introductionmentioning

confidence: 99%

Use of TLS (LiDAR) for Building Diagnostics with the Example of a Historic Building in Karlino

2020

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“…Built Heritage is subjected to deterioration caused by a number of factors, environmental and anthropogenic as well. Among the first type, blackening of surfaces due to carbon particles accumulation, nitrogen oxides action and bacteria-induced growing of microorganisms may be cited (Brimblecombe and Grossi, 2005;Gulotta et al 2018;Pozo-Antonio et al 2019;Vidal et al 2019) The water access to the inner part of the building materials might be commented as another way of deterioration (Brai et al, 2007;Piuzzi et al 2018). As a matter of fact, water can penetrate into the materials giving rise to soluble salts dissolution, efflorescences and the breaking of the materials due to freezing-thawing cycles.…”

Section: Introductionmentioning

confidence: 99%

Development of Multifunctional Coatings for Protecting Stones and Lime Mortars of the Architectural Heritage

Speziale

González-Sánchez

Taşcı

et al. 2020

International Journal of Architectural Heritage

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Unique multifunctional coatings, comprising a 3D superhydrophobic agent and two nanostructured photocatalysts (solar-light sensitive 50/50 and 10/90 TiO 2 -ZnO nanoheterostructures), compatible with the inorganic substrates of the Built Heritage, have been designed.The synthesized nanoparticles showed an enhanced photocatalytic activity (tested by NO degradation) as compared with the raw TiO 2 and ZnO materials.Dispersing agents were used to optimize the coatings, avoiding agglomeration of the photocatalytic nanoparticles and increasing the stability of the suspensions. Four distinct dispersions were optimized and applied as coatings onto stony materials used in the Built Heritage, such as sandstone, lime mortar, granite and limestone. Their effectiveness was assessed by assessing hydrophobicity of the surfaces (static water contact angle), photocatalytic activity and self-cleaning as well as water vapour permeability of the treated specimens. These transparent coatings demonstrated high compatibility with the construction materials of the Architectural Heritage and showed a synergistic effect rendering a minimized water absorption, self-cleaning ability evidenced by the reduced adsorption of soiling deposits and a reasonable degradation of any trace that might be adsorbed, as well as a protecting hydrophobic environment for the photocatalyst.

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“…To be specific, many works consider the altered and unaltered areas of a historic material as two categories rather than identifying the different deterioration typologies, which is also partly a result of the state of preservation of the heritage assets involved. Alternative multi-sensor approaches, involving terrestrial LiDAR for NIR recording, have been reported to produce high-accuracy thematic mapping results for damaged historic structures [57,58]. However, they introduce significant instrumentation costs, and require rigorous radiometric calibrations and optimal data gathering conditions.…”

Section: Digital Image Processingmentioning

confidence: 99%

Learning-based classification of multispectral images for deterioration mapping of historic structures

Adamopoulos

2021

J Build Rehabil

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The conservation of historic structures requires detailed knowledge of their state of preservation. Documentation of deterioration makes it possible to identify risk factors and interpret weathering mechanisms. It is usually performed using non-destructive methods such as mapping of surface features. The automated mapping of deterioration is a direction not often explored, especially when the investigated architectural surfaces present a multitude of deterioration forms and consist of heterogeneous materials, which significantly complicates the generation of thematic decay maps. This work combines reflectance imaging and supervised segmentation, based on machine learning methods, to automatically segment deterioration patterns on multispectral image composites, using a weathered historic fortification as a case study. Several spectral band combinations and image classification techniques (regression, decision tree, and ensemble learning algorithmic implementations) are evaluated to propose an accurate approach. The automated thematic mapping facilitates the spatial and semantic description of the deterioration patterns. Furthermore, the utilization of low-cost photographic equipment and easily operable digital image processing software adds to the practicality and agility of the presented methodology.

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Quantification and mapping of deterioration patterns on granite surfaces by means of mobile LiDAR data

Cited by 16 publications

References 36 publications

Use of TLS (LiDAR) for Building Diagnostics with the Example of a Historic Building in Karlino

Use of TLS (LiDAR) for Building Diagnostics with the Example of a Historic Building in Karlino

Development of Multifunctional Coatings for Protecting Stones and Lime Mortars of the Architectural Heritage

Learning-based classification of multispectral images for deterioration mapping of historic structures

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