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

G. Sherzer, Peng Gao, Guang Ye, E. Gal

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

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.
Original languageEnglish
Title of host publicationProceedings of the International RILEM Conference Materials, Systems and Structures in Civil Engineering 2016
Subtitle of host publicationSegment on Service Life of Cement-Based Materials and Structures
EditorsM. Azenha, I. Gabrijel, D. Schlicke, T. Kanstad, O. Mejlhede Jensen
Place of PublicationLyngby, Denmark
PublisherRILEM Publications S.A.R.L.
Pages789-798
Number of pages10
Volume2
EditionPRO 109
ISBN (Electronic)978-2-35158-173-5
ISBN (Print)978-2-35158-171-4
Publication statusPublished - 22 Aug 2016
EventInternational RILEM Conference on Materials, Systems and Structures in Civil Engineering : Conference segment on Concrete with Supplementary Cementitious Materials - Technical University of Denmark, Lyngby, Denmark
Duration: 22 Aug 201624 Aug 2016
http://www.conferencemanager.dk/MSSCE2016/home.html

Conference

ConferenceInternational RILEM Conference on Materials, Systems and Structures in Civil Engineering
Abbreviated titleMSSCE 2016
CountryDenmark
CityLyngby
Period22/08/1624/08/16
Internet address

Keywords

  • Autogenous self-healing
  • Microcracks
  • Service life prediction
  • Image analysis

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