DOI: 10.5281/zenodo.17965425
title: Data for: Impact of temperature and relative humidity variations on coda waves in concrete

description: This dataset contains data collected within the Chair of Materials Science and Testing at the Technical University of Munich. A short description of the data set is given below. This data has been generated within the framework of the DFG Research Unit Concrete Damage Assessment by Coda Waves (CoDA). For further details on the Research Unit, and related datasets we refer to the description of the community.

Before downloading the data, please read the technical information provided below.

Research ObjectiveThe experiment was created to investigate the following two research questions:1.    Effect of homogeneous internal material moisture and temperature states on ultrasonic waves in concrete evaluated using coda wave interferometry.2.    Effect of inhomogeneous (special gradients) internal material moisture and temperature states on ultrasonic waves in concrete evaluated using coda wave interferometry.
description: Experiment Description

The geometry of the specimen is a cuboid with an edge length of 400 mm and a square cross-section of 100 x 100 mm2 For both concrete mixes (w/c = [0.45, 0.60]), three specimens are equipped with ultrasonic transducers and another three specimens with a Pt100 element (T). The specimens’ mass m is monitored for three further specimens to track changes in mass. The ultrasonic signals were retrieved from symmetrically positioned embedded piezoelectric transducers, each at a distance of 300 mm from the center axis. 

The other embedded sensors consist of ambient temperature and relative humidity sensors in the climate chamber and an embedded Pt100 element for temperature T [◦ C] measurement positioned at the center of each specimen. Strain gauges (PL-60-11-3LJCT-F) with a gauge resistance of R = 120 and a length of l = 60 mm, applied to the surface on two opposite sides and implemented as a quarter bridge, tracked thestrain.

The experimental variations of in temperature was between 55 °C and 2 ◦ C, while the relative humidity was modulated between 95 % RH and 35 % RH in the climate chamber.

Material CompositionsConcrete composition of all the experiments in this dataset: Concrete: OPC (CEM I 42.5 R); w/c 0.60; max. aggregate 16mm (quartzitic crushed)                OPC (CEM I 42.5 R); w/c 0.45; max. aggregate 16mm (quartzitic crushed)

The numbering of mixtures, specimens and sensors corresponds to the system used by the DFG Research Unit Concrete Damage Assessment by Coda Waves (CoDA). For further details on the Research Unit and related datasets we refer to the description of the community
description: The data is structured as per experiment as follows:

A CEMI42.5R_0.60_16

01 Original Documents

·         Images   

·         Characteristic values 

02 Raw Data



01 Material Properties (Concrete mix design, as .pdf)

02 Associated data (strain, temperature, relative humidity data, as .pkl files)

03 Ultrasonic signals, raw (.pkl files) of each specimen


B CEMI42.5R_0.45_16

01 Original Documents

·         Images     

·         Characteristic values    

02 Raw Data



01 Material Properties (Concrete mix design, as .pdf)

02 Associated data (strain, temperature, relative humidity data, as .pkl files)

03 Ultrasonic signals, raw (.pkl files) of each specimen


 
description: Data is given in the following formats:



sensor data (.pkl)

supplementary data (.pdf, .jpg)


Disclaimer: This data set contains data in the pickle data format. It is possible to construct malicious pickle data which will execute arbitrary code during unpickling. More information can be retrieved in the respective documentation (https://docs.python.org/3/library/pickle.html). 
description: This Version of the dataset contains the data of the article published on 14th August 2024 in Scientific Reports.

This dataset may be revised in future versions. Updates may include the addition of new matching data, as well as changes to data formatting, structure, or organization.
description: In A CEMI42.5R_0.60_16:Specimen ID 58 - 61 were embedded with ultrasonic sensors and strain.Specimen ID 62 - 64 were the acompanying specimen used for mass measurement.

In B CEMI42.5R_0.45_16:Specimen ID 65 - 68 were embedded with ultrasonic sensors and strain.Specimen ID 69 - 71 were the acompanying specimen used for mass measurement.