Data of Article : Long term hydration of low-pH cementitious materials: lessons from Roman hydraulic mortars and implications for thermodynamic modeling asnr-roc-art2

Data (Raw data with post-processing script) related to the publication of article : Long term hydration of low-pH cementitious materials: lessons from Roman hydraulic mortars and implications for thermodynamic modeling

Raw Data Formats:

.pkl : dataframe (pickles)
.bcf: SEM-EDS Hyperspectral Bruker format
.xrdml: XRD Malvern Panalytical format
.htc: Reactive transport Hytec format

Software Used for Post-Processing:
.ipynb: Jupyter Notebook (Python)
.xlsx: Microsoft Excel
.HPF2: Malvern Panalytical HighScore Plus

Abstract :

Concepts for the deep geological disposal of high-level and long-lived intermediate-level radio-active waste involve the use of cementitious materials exposed to multi-ionic environments and designed to perform over millennial timescales. Owing to the impracticality of experimentally probing hydration and degradation processes over such durations, durability assessments rely on uncertain long-term extrapolations of models calibrated against short-term experiments. Here we confront 2,000-year thermodynamical and micromechanical simulations of hydration reactions with multi-scale experimental data obtained from various samples of different ages, ranging from early-age laboratory material to ancient hydraulic mortars from the harbors of Misenum (Italy) and Caesarea Maritima (Israel). Our combined experimental and modelling approach quantifies the evolution of the chemo-mechanical properties of these materials and their durability over an unprecedented timescale. We show that C–A–S–H phases exhibit chemical and mechanical sta-bility that is critical for the multi-millennial durability of cementitious materials considered for radioactive waste containment structures.