Mesoscale simulation of cement based materials' time-dependent behavior

A numerical mesoscale model for the characterization of creep and shrinkage of cement based materials is evaluated. It is the first mesoscopic model for cement-based materials time-dependent behavior. The analytical part of model is developed using Solidification Theory, Kelvin type theological models, and Dirichlet Series. Concrete is modeled as three phased composite system. The aggregate shape and grading is designed by the written program according to American Standards. The whole concrete cross-section is simulated by using lattice type modeling algorithm. Numerically generated concretes creep and shrinkage behaviors are evaluated and cross section of the specimen is reshaped. Thus, the behaviors of each three phases are observed according to aggregate type, shape, and grading, cement content and ingredients, water, temperature, cross-section, and volume of whole concrete. The simulation results are confirmed some of the existing theories and provided new information on concrete creep and shrinkage. (C) 2007 Elsevier B.V. All rights reserved.