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Pro109-2

EVALUATION OF THE LDPM ELASTIC AND FRACTURE PARAMETERS BY UP-SCALING PROCEDURE



Author(s): G. Sherzer, Peng Gao, Guang Ye, Erez Gal
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-171-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 789-798
Total Pages: 10
Language : English


Abstract: The heterogeneity of the concrete may be considered on different size scales of observation,
ranging from the atomistic scale (10^(-10)m), characterized by the behavior of crystalline
particles of hydrated Portland cement, to the macroscopic scale (101m), where concrete has
traditionally been considered homogeneous. The multiscale framework we are proposing in
this paper is based on the following models: chemical analyses at the cement paste scale;
mechanical lattice model at the cement and mortar scales; geometrical aggregate distribution
models at the mortar and concrete scales; and the Lattice Discrete Particle Model (LDPM) at
the concrete scale. For that purpose, a set of analysis starting from a known set of parameters
of the cement paste. This input is utilized to evaluate the mechanical properties of the mortar-
s (cement and sand), and then these properties are used to evaluate the mechanical properties
of the mortar-a4 (mortar-s and aggregate smaller then 4mm). The upscaling in the proposed
methodology involved the evaluation of the LDPM concrete parameters based on the mortar-
a4 properties. Here we are suggesting a uni-axial tension "numerical experiments" on the
mortar-a4 scale to evaluate the elastic and fracture LDPM mechanical parameters.


Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00


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