Data set for ‘Re-Use and Volume Reduction of Scabbled Contaminated Concrete Arising from Nuclear Decommissioning’ This data set contains all data from the PhD research for the above title, broken down into subfolders for individual experimental methods, with self-explanatory titles. All data was collected at the university of Leeds, from 2015-2018, by Toby James Alasdair Lord. File formats are primarily raw data .csv .txt .xls or instrument/software specific files. Analysed and processed data is in .xlsx or .opj OriginPro project files. Throughout all files, a consistent sample naming system has been used. The first one or two characters refer to the sample type; R reference with no replacement material used*. Q is quartz, C1 is CEM I ground concrete, C2 is CEM II ground concrete, T1 is carbonated ground CEM I concrete and T2 is carbonated ground CEM II concrete. The first number following refers to the degree of replacement, as a percentage, at either 10, 20 or 40% replacement. The third number, where used, refers to the age of the sample, at either 1, 7, 28 or 90 days. An example of this is C2-20-7, which would be ground CEM II concrete used as a binder replacement, at 20% inclusion, with the sample being 7 days old at testing. *Due to R samples by definition having zero replacement, they were referred to using only R-age of sample.