Recommendation of RILEM TC 218-SFC: Sonic methods for quality control of fresh cementitious materials*

Reinhardt, Hans‐Wolf

doi:10.1617/s11527-011-9734-9

Cited by 18 publications

(2 citation statements)

References 7 publications

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“…38 This technique is well introduced and commonly used to monitor the curing of cementitious materials. 39,40 A detailed description can be found in refs 41 and 42. Figure 1a shows the technical implementation such a FreshCon measurement.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…With the aide of several assumptions, the evolution of the elastic parameters can be computed from these velocities . This technique is well introduced and commonly used to monitor the curing of cementitious materials. , A detailed description can be found in refs and . Figure a shows the technical implementation such a FreshCon measurement.…”

Section: Methodsmentioning

confidence: 99%

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Bacterial Additives Improve the Water Resistance of Mortar

Ertelt

Raith

Eisinger

et al. 2020

ACS Sustainable Chem. Eng.

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The ingress of water into mortar and concrete is an ongoing problem which can reduce the lifetime of cementitious structures. Commonly used approaches that aim at preventing water ingress mainly employ an additional surface treatment after the casting process. Thus, they are time-consuming and make use of synthetic, nonsustainable additives. In contrast, it was shown recently that a biological material, i.e., a bacterial biofilm generated by B. subtilis 3610 bacteria, can be used as a bulk additive which leads to hybrid mortar with increased wetting resistance. Here, we demonstrate that a similar enhancement of the water resistance of mortar can be achieved by using different bacterial additives, i.e., wet biofilm, freeze-dried biofilm powder, and bacterial suspensions, each of which can be produced by one of three selected variants of B. subtilis bacteria. We characterize the mechanical properties of the different hybrid mortar variants regarding their setting behavior, tensile and compressive strength, and density. Our results imply that bacterial additives could be an eco-friendly and sustainable alternative to existing synthetic mortar additives.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Bacterial Additives Improve the Water Resistance of Mortar

Ertelt

Raith

Eisinger

et al. 2020

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

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Some developments in the field of non‐destructive testing ‐ new devices and techniques, industrial training and academic education

Grosse,

Algernon,

Arndt

et al. 2023

ce papers

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Non‐destructive testing in civil engineering is a fast‐emerging field. This includes not only new devices, sensors, and techniques for the inspection of materials, components, and structures contributing to building information modeling (BIM) but also efficient concepts for structural health monitoring in the frame of digital twins. The paper highlights some of these new developments and examples for applications covering the design of new construction materials, quality control during construction, contributions to predictive maintenance, and finally the rehabilitation and repair of structures.The new demands and techniques require new training concepts for the qualification of experts for the construction industry but also well‐structured courses for the academic education of students. Some new standards for training and education will be introduced. This paves the way for modern, efficient, and reliable applications of non‐destructive testing and structural health methods.

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