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Materials 2017, 10(3), 242; doi:10.3390/ma10030242

Upscaling Cement Paste Microstructure to Obtain the Fracture, Shear, and Elastic Concrete Mechanical LDPM Parameters

1
Department of Structural Engineering, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel
2
Microlab/Section of Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
3
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Received: 24 December 2016 / Revised: 15 February 2017 / Accepted: 16 February 2017 / Published: 28 February 2017
(This article belongs to the Special Issue Numerical Analysis of Concrete using Discrete Elements)
View Full-Text   |   Download PDF [8254 KB, uploaded 28 February 2017]   |  

Abstract

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. View Full-Text
Keywords: concrete material; numerical simulation; lattice model; discrete models; fracture; upscaling procedure; homogenization concrete material; numerical simulation; lattice model; discrete models; fracture; upscaling procedure; homogenization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sherzer, G.; Gao, P.; Schlangen, E.; Ye, G.; Gal, E. Upscaling Cement Paste Microstructure to Obtain the Fracture, Shear, and Elastic Concrete Mechanical LDPM Parameters. Materials 2017, 10, 242.

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