Next: Example Applications
Up: Three-dimensional Cement Hydration
Previous: Model execution
In addition to the capability of writing the final hydrated microstructure to
a file, four additional files are created during the execution of
disreal3d. The first of these contains a log of the program execution and
is written to stdout (standard output). Thus, to save this to file, the user
would typically pipe the output, perhaps using a command line of the form:
disreal3d <disreal3d.dat >disreal3d.out.
This file contains a listing of all user inputs, the number of diffusing
species created during each dissolution, the number of pixels of each phase
present during each cycle, and information on the assessment of percolation
properties of the pore space and the total solids.
The second file, phases.out, contains for each cycle the number of pixels of each phase present at the end of execution of the cycle and the number of pixels of water remaining in the system (for hydration under sealed or self-desiccating conditions). These phase counts are given in the order in which the phases are listed (0-22) in the disreal3d.c program provided in Appendix C.
The third file, heat.out, contains for each cycle, the degree of hydration achieved both on a volume and a mass basis and the estimated heat release using four different methods, the first based on the specific enthalpy values of each phase and the latter three based on different values for the heats of hydration of each of the four major clinker phases, as documented in the code listing provided in Appendix C. It is the fourth value that is currently utilized in calculating the temperature rise for hydration under adiabatic conditions.
The fourth file, adiabatic.out, contains an estimate of the adiabatic heat signature for a concrete or mortar with the 3-D cement paste as its binder component. Here for each cycle, the file contains the estimated equivalent time in hours, the temperature in degrees Celsius, the degree of hydration on a mass basis, the estimated reaction rate at the current temperature, the current estimate of the heat capacity of the mortar or concrete in J/g/oC, and the current mass fraction of cement in the system. This latter value should remain constant unless the hydration is being executed under saturated conditions, in which case the additional water imbibed into the hydrating cement paste will reduce the mass fraction of cement in the overall system.
The latter three of these files are in a format which can be easily imported into a spreadsheet or read directly into a plotting package. This allows the user to compare results from different cements, w/c ratios, or hydration conditions or to produce plots of various properties vs. the number of hydration cycles or the estimated equivalent real time for comparison to experimental data.
Next: Example Applications
Up: Three-dimensional Cement Hydration
Previous: Model execution