A5049750866- Geophysical Methods and Applications
- Ultrasonics and Acoustic Wave Propagation
- Non-Destructive Testing Techniques
- Concrete and Cement Materials Research
- Smart Materials for Construction
- Seismic Imaging and Inversion Techniques
- Magnesium Oxide Properties and Applications
Federal Institute For Materials Research and Testing
2021-2024
Abstract The corner echo is a well-known effect in ultrasonic testing, which allows detection of surface breaking cracks with predominantly perpendicular orientation to the as, for example, corrosion metal pipes or shafts. This formed by two planes, crack and breaks. It can also be classified as half-skip method, since reflection pulse occurs on backwall before at defect takes place. In combination diffraction from tip, sizing. As shown this paper, used civil engineering nondestructive...
Low-frequency ultrasonic testing is a well-established non-destructive (NDT) method in civil engineering for material characterization and the localization of cracks, reinforcing bars delamination. A novel borehole probe developed situ quality assurance sealing structures radioactive waste repositories using existing research boreholes. The aim to examine made salt concrete any possible cracks delamination localize built-in components. prototype has been 12 individual horizontal dry point...
Abstract. Within the project SealWasteSafe, we advance construction materials and monitoring concepts of sealing structures applied for underground disposal nuclear or toxic waste. As these engineered barriers have high demands concerning integrity, an innovative alkali-activated material (AAM) is improved tested on various laboratory scales. This AAM has low reaction kinetics related to a preferential slow release heat in comparison alternative salt concretes based Portland cement magnesium...
Within the project SealWasteSafe, we advance construction materials and non-destructive monitoring concepts of sealing structures applied for underground disposal nuclear waste. As these engineered barriers have high demands regarding structural integrity, an innovative alkali-activated material (AAM) that is highly suitable application in salt as a host rock improved tested on two laboratory scales. This AAM has low heat evolution due to reaction mechanism comparison common concretes based...
The Large Aperture Ultrasound System (LAUS) developed at BAM is known for its ability to penetrate thick objects, especially concrete structures commonly used in nuclear waste storage and other applications civil engineering. Although the current system effectively penetrates up ~9 m, further optimization imperative enhance safety integrity of disposal radioactive or toxic waste. This study focuses on enhancing system’s efficiency by optimizing transducer spacing, ensuring that resolution...
A new type of ultrasonic borehole probe is developed for the quality assurance sealing structures in radioactive waste repositories using existing research boreholes. The goal to examine made salt concrete possible cracks, delamination, and embedded objects. prototype uses 12 individual dry point contact (DPC) horizontal shear wave transducers separated by equidistant transmitter/receiver arrays, each up six transducers. It operated with a commercially available portable flaw detector used...
The retroreflective corner echo is used, for example, in ultrasonic non-destructive testing of metals to find fatigue cracks tubes or shafts. If the much weaker crack tip signal additionally detected, length can also be determined. A reflection occurs cases surface breaking with predominantly perpendicular orientation surface. intensity depends on angle incidence and wave mode used. For reliable detection vertical metals, transversal waves are commonly which propagate at an 37° 53°...