SPP 2020 – Fatigue and Acoustic Emission Data of High-Strength Concretes and Mortars with Varying Composition

This dataset contains experimental fatigue data from compressive cyclic loading tests on four high-strength concretes and their corresponding mortars. The materials vary systematically in coarse aggregate type (basalt vs. granite), silica fume addition, and water-to-cement ratio (w/c).

Concrete mixes are labeled RH1-B, RH1-B-Si, RH1-B-w, and RH1-G, while their corresponding mortars are labeled M-B, M-B-Si, and M-B-w, all related to the reference concrete RH-1 from SPP 2020.

The data are associated with Chapter 3, *Composition Influenced Damage Development in High-strength Concrete due to Cyclic Loading*, authored by Tim Timmermann, Stefan Löhnert, and Nadja Oneschkow. This chapter appears in the final project book *Cyclic Deterioration of High-Performance Concrete – Reports of the SPP 2020 Experimental-Virtual-Lab*, published in June 2025.

A total of 38 cylindrical specimens were tested, comprising 21 concrete specimens and 17 mortar specimens. All specimens had a height-to-diameter ratio of 180/60 mm. Fatigue loading was applied under constant amplitude with a maximum stress level of 0.70 or 0.85, a minimum stress level of 0.05, and a test frequency of 1 Hz, continuing until failure.

## The dataset includes:
* Concrete metadata (e.g., composition, date of concreting)
* Specimen metadata including production details, geometry, and mechanical properties
* Loading parameters and sensor configuration

## For each recorded load cycle, the dataset provides:
* Related number of load cycles
* Time [s]
* Maximum and minimum axial force [kN]
* Maximum and minimum axial stress [MPa]
* Axial strain at maximum and minimum stress (measured by laser extensometers) [‰]
* Stiffness (decreasing branch) [MPa]
* Ambient temperature, loading plate temperature, and specimen surface temperature [°C]
* Acoustic emission hits (summed counts) [-]

This dataset supports a detailed understanding of the interplay between material composition and fatigue damage development in high-strength concrete and mortar.