TY - JOUR

T1 - Upscaling cement paste microstructure to obtain the fracture, shear, and elastic concrete mechanical LDPM parameters

AU - Sherzer, Gili

AU - Gao, Peng

AU - Schlangen, Erik

AU - Ye, Guang

AU - Gal, Erez

N1 - Publisher Copyright:
© 2017 by the authors.

PY - 2017

Y1 - 2017

N2 - Modeling the complex behavior of concrete for a specific mixture is a challenging task, as it requires bridging the cement scale and the concrete scale. We describe a multiscale analysis procedure for the modeling of concrete structures, in which material properties at the macro scale are evaluated based on lower scales. Concrete may be viewed over a range of scale sizes, from the atomic scale (10-10 m), which is characterized by the behavior of crystalline particles of hydrated Portland cement, to the macroscopic scale (10 m). The proposed multiscale framework is based on several models, including chemical analysis at the cement paste scale, a mechanical lattice model at the cement and mortar scales, geometrical aggregate distribution models at the mortar scale, and the Lattice Discrete Particle Model (LDPM) at the concrete scale. The analysis procedure starts from a known chemical and mechanical set of parameters of the cement paste, which are then used to evaluate the mechanical properties of the LDPM concrete parameters for the fracture, shear, and elastic responses of the concrete. Although a macroscopic validation study of this procedure is presented, future research should include a comparison to additional experiments in each scale.

AB - Modeling the complex behavior of concrete for a specific mixture is a challenging task, as it requires bridging the cement scale and the concrete scale. We describe a multiscale analysis procedure for the modeling of concrete structures, in which material properties at the macro scale are evaluated based on lower scales. Concrete may be viewed over a range of scale sizes, from the atomic scale (10-10 m), which is characterized by the behavior of crystalline particles of hydrated Portland cement, to the macroscopic scale (10 m). The proposed multiscale framework is based on several models, including chemical analysis at the cement paste scale, a mechanical lattice model at the cement and mortar scales, geometrical aggregate distribution models at the mortar scale, and the Lattice Discrete Particle Model (LDPM) at the concrete scale. The analysis procedure starts from a known chemical and mechanical set of parameters of the cement paste, which are then used to evaluate the mechanical properties of the LDPM concrete parameters for the fracture, shear, and elastic responses of the concrete. Although a macroscopic validation study of this procedure is presented, future research should include a comparison to additional experiments in each scale.

KW - Discrete models

KW - Fracture

KW - Homogenization

KW - Lattice model

KW - Numerical simulation

KW - Upscaling procedure

KW - concrete material

UR - http://www.scopus.com/inward/record.url?scp=85014991820&partnerID=8YFLogxK

U2 - 10.3390/ma10030242

DO - 10.3390/ma10030242

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AN - SCOPUS:85014991820

SN - 1996-1944

VL - 10

JO - Materials

JF - Materials

IS - 3

M1 - 242

ER -