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|Author(s):||Blaza Toman; Adriana Hornikova; Robert C. Hagwood; Hung-Kung Liu; Nien F. Zhang; Edward J. Garboczi; Jeffrey W. Bullard;|
|Title:||Uncertainty Analysis for Virtual Cement Measurement|
|Published:||September 13, 2006|
|Abstract:||Virtual measurements are the outputs of well-defined mathematical models based on theoretical principles and simulation algorithms. The VCCTL (Virtual Cement and Concrete Testing Laboratory) is a software system built by the Material and Construction Research Division of NIST to perform these computations. Its intended use is as a research/exploratory tool to model the formation of concrete. This presentation describes our efforts at verification and validation of the VCCTL software. We have also examined the effects of choice of random seeds in the simulations. We have performed sensitivity analysis of the VCCTL measurements of heat of hydration with respect to changes in various input variables. For a particular subset of Portland cements, it is possible to compare physical measurements obtained by large inter-laboratory experiments to the VCCTL virtual measurements. This enables a pre real testing study of cements that is time and cost saving.|
|Conference:||Joint Statistical Meeting|
|Proceedings:||Proceedings of Joint Statistical Meetings|
|Keywords:||Computer experiments, uncertainty, Bayesian hierarchical models|
|Research Areas:||Information Technology|