Impact of grain sizes on the quantitative concrete analysis using laser-induced breakdown spectroscopy

Gottlieb, Cassian; Günther, Tobias; Wilsch, Gerd

doi:10.1016/j.sab.2018.02.004

Cited by 25 publications

(5 citation statements)

References 25 publications

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“…Afterward the chloride content of the mortar, in the range of the POI, was determined by laser‐induced breakdown spectroscopy (LIBS). [ 26–30 ]…”

Section: Methodsmentioning

confidence: 99%

“…Afterward the chloride content of the mortar, in the range of the POI, was determined by laser-induced breakdown spectroscopy (LIBS). [26][27][28][29][30] In LIBS measurement, a pulsed laser beam is focused on the sample surface, thereby vaporizing, atomizing, and ionizing sample material. The plasma induced by the laser emits element-specific radiation, which is analyzed spectroscopically.…”

Section: Capillary Suction Test In Combination With Highly Local Chlo...mentioning

confidence: 99%

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A comparison of methods to assess the resistance of reinforcing steel against chloride‐induced corrosion in concrete—Particular consideration of 12% chromium steel

Käthler

Ebell

Keßler

et al. 2021

Materials & Corrosion

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The critical chloride content Ccrit is an indicator of the corrosion resistance of reinforcing steels in concrete. In this article, several experimental methods for determining the critical chloride content Ccrit of mild and alloyed (12% Cr) steel in cementitious materials are compared. The methods used include accelerated polarization tests and tests employing more natural (unpolarized) conditions in which chloride ingress occurs by diffusion and capillary uptake. The advantages and disadvantages of the methods are discussed, in particular, against the objective of reaching a compromise between applicability to practice and feasibility in laboratory testing.

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“…Afterward the chloride content of the mortar, in the range of the POI, was determined by laser‐induced breakdown spectroscopy (LIBS). [ 26–30 ]…”

Section: Methodsmentioning

confidence: 99%

Section: Capillary Suction Test In Combination With Highly Local Chlo...mentioning

confidence: 99%

A comparison of methods to assess the resistance of reinforcing steel against chloride‐induced corrosion in concrete—Particular consideration of 12% chromium steel

Käthler

Ebell

Keßler

et al. 2021

Materials & Corrosion

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“…This is very crucial to be sure that no cement has been misclassified, because normally, concrete also contains sand with a particle-size distribution between 4 and 0.063 mm and also fine particles smaller than 0.063 mm. According to [ 24 ], it is not possible to truly measure the particles smaller than the focal spot of the laser or partially ablated cement and aggregate, which in our case is 80 μm. However, it is important that no particle larger than the focal spot is misclassified.…”

Section: Resultsmentioning

confidence: 99%

Automated Distinction between Cement Paste and Aggregates of Concrete Using Laser-Induced Breakdown Spectroscopy

2021

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Laser-induced breakdown spectroscopy (LIBS) is a technique which enables the analysis of material components with precision and spatial resolution. Furthermore, the investigation method is comparatively fast which enables illustrating the distribution of elements within the examined material. This opens new possibilities for the investigation of very heterogeneous materials, such as concrete. Concrete consists of cement, water, and aggregates. As most of the transport processes take place exclusively in the hardened cement paste, relevant limit values linked to harmful element contents are specified in relation to the cement mass. When a concrete sample from an existing structure is examined, information on the concrete composition is usually not available. Therefore, assumptions have to be made to convert the element content analyzed in the sample based on the cement content in the sample. This inevitably leads to inaccuracies. Therefore, a method for distinction between cement paste and aggregates is required. Cement and aggregate components are chemically very close to each other and therefore, complex for classification. This is why the consideration of a single distinguishing feature is not sufficient. In this paper, a machine learning method is described and has been used to automate the distinction of the cement paste and aggregates of the LIBS data to receive reliable information of this technique. The presented approach could potentially be employed for many heterogeneous materials with the same complexity to quantify the arbitrary substances.

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“…For the repeatability and trueness of LIBS analysis, the relationship between the size of the laser spot and the grain diameter is usually of great importance [26,27]. The larger the laser spot, the more grains are involved in the measurement, and thus the material appears to be more uniform.…”

Section: Factors Affecting Performancementioning

confidence: 99%

Interlaboratory Comparison for Quantitative Chlorine Analysis in Cement Pastes with Laser Induced Breakdown Spectroscopy

Völker

Wilsch

Gornushkin

et al. 2022

Preprint

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Impact of grain sizes on the quantitative concrete analysis using laser-induced breakdown spectroscopy

Cited by 25 publications

References 25 publications

A comparison of methods to assess the resistance of reinforcing steel against chloride‐induced corrosion in concrete—Particular consideration of 12% chromium steel

A comparison of methods to assess the resistance of reinforcing steel against chloride‐induced corrosion in concrete—Particular consideration of 12% chromium steel

Automated Distinction between Cement Paste and Aggregates of Concrete Using Laser-Induced Breakdown Spectroscopy

Interlaboratory Comparison for Quantitative Chlorine Analysis in Cement Pastes with Laser Induced Breakdown Spectroscopy

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