Micromechanical modeling for material design of durable infrastructural materials: The influence of aggregate and matrix modification on elastic behavior of mortars

Sumanta Das, Amit Maroli, Narayanan Neithalath

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

This paper reports the fundamental difference in microstress distributions in traditional hardened cement paste with quartz inclusions and a cement paste with lightweight aggregate (LWA) inclusions using microstructurebased numerical simulation involving finite element method with periodic boundary conditions. Variation of relative stress distributions under varying component material properties and varying microstructural features in both the systems is elucidated for a comprehensive understanding. The presented microstructure-based numerical technique accurately captures the stress concentrations inside microheterogeneous systems, which is otherwise not detectible using analytical homogenization schemes. Numerical simulations reveal that strengthening and stiffening of matrix and interfacial transition zone (ITZ) with silica fume incorporation as cement replacement in LWA incorporated cementitious systems has a detrimental effect in terms of overall strength of the material, contrary to traditional quartz-based cement mortar system. Proper selection of stiffness and strength of LWA inclusions is critical towards performance of such materials. This paper links the microstructure with mechanical behavior of two different microheterogeneous materials and provides valuable input towards material design of such non-traditional cementitious systems with different inclusions.

Original languageEnglish (US)
Title of host publicationInternational Conference on Durability of Concrete Structures, ICDCS 2016
PublisherPurdue University
Pages155-162
Number of pages8
StatePublished - 2016
Event5th International Conference on Durability of Concrete Structures, ICDCS 2016 - Shenzhen, Guangdong Province, China
Duration: Jun 30 2016Jul 1 2016

Other

Other5th International Conference on Durability of Concrete Structures, ICDCS 2016
CountryChina
CityShenzhen, Guangdong Province
Period6/30/167/1/16

ASJC Scopus subject areas

  • Building and Construction
  • Mechanics of Materials
  • Safety, Risk, Reliability and Quality
  • Materials Science(all)

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    Das, S., Maroli, A., & Neithalath, N. (2016). Micromechanical modeling for material design of durable infrastructural materials: The influence of aggregate and matrix modification on elastic behavior of mortars. In International Conference on Durability of Concrete Structures, ICDCS 2016 (pp. 155-162). Purdue University.