Evaluation of the LDPM elastic and fracture parameters by up-scaling procedure

Evaluation of the LDPM elastic and fracture parameters by up-scaling procedure

Sherzer, G. (Ben-Gurion University of the Negev)
Gao, P. (TU Delft Materials and Environment)
Ye, G. (TU Delft Materials and Environment)
Gal, E. (Ben-Gurion University of the Negev)

Azenha, M. (editor)
Gabrijel, I. (editor)
Schlicke, D. (editor)
Kanstad, T. (editor)
Mejlhede Jensen, O. (editor)

2016-08-22

The heterogeneity of the concrete may be considered on different size scales of observation, ranging from the atomistic scale (10-10m), characterized by the behavior of crystalline particles of hydrated Portland cement, to the macroscopic scale (101 m), 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 mortars (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 mortara4 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.

Autogenous self-healing
Microcracks
Service life prediction
Image analysis

http://resolver.tudelft.nl/uuid:e43d5d57-eaba-4567-9337-c1f5c8d3eea9

RILEM Publications S.A.R.L., Lyngby, Denmark

978-2-35158-171-4

Proceedings of the International RILEM Conference Materials, Systems and Structures in Civil Engineering 2016: Segment on Service Life of Cement-Based Materials and Structures, 2 (PRO 109)

International RILEM Conference on Materials, Systems and Structures in Civil Engineering, 2016-08-22 → 2016-08-24, Technical University of Denmark, Lyngby, Denmark

Institutional Repository

conference paper

© 2016 G. Sherzer, P. Gao, G. Ye, E. Gal