Modelling the microstructure of cement

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Australian and New Zealand Institutes of Physics
To gain a better understanding of the factors that influence the strength and durability of concrete the microporosity of hydrated cement paste has been investigated, by small angle neutron scattering (SANS). The great advantage that SANS has over the more conventional methods of microporosity analysis such as mercury or gas intrusion, is that for SANS measurements it is not necessary to dehydrate the samples and the process is non-intrusive. However the results from SANS are often open to several different interpretations and it is necessary to obtain additional information where possible .One method of obtaining such additional information is through computer modelling of the process of cement hydration. In this poster we present the results of a 3- dimensional computer model that simulates the growth of a layer of calcium-silicate-hydrate (CSH) on a surface. The model used is similar to that for random aggregates (TA Witten and LM. Sanders, Phys. Rev. Lett. 19,1400 (1981)). The model calculates the porosity and the pore size distributions, which can men be compared with those obtained from SANS measurements.
Cements, Building materials, Data analysis, Microstructure, Porosity, Small angle scattering, Simulation
Bertram, E. K., Sabine, T. M., & Aldridge, L. P. (1994). Modelling the microstructure of cement. Paper presented to the 18th Annual Condensed Matter Physics Meeting, Charles Sturt University, Riverina, Wagga, Wagga, NSW, 9-11 February 1994.