Basic creep and fracture response of fine recycled aggregate concrete

Ange Therese Akono; Jiaxin Chen; Mimi Zhan; Surendra P. Shah

doi:10.1016/j.conbuildmat.2020.121107

Basic creep and fracture response of fine recycled aggregate concrete

Ange Therese Akono^*, Jiaxin Chen, Mimi Zhan, Surendra P. Shah

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

We investigate the basic creep and fracture response of fine recycled aggregate concrete using nanoscale mechanical characterization modules integrated with nonlinear micromechanical modeling and machine learning methods. Fine recycled concrete aggregate mortar exhibits a larger volume fraction of micropores and low-density calcium silicate hydrates compared to natural sand mortar. In return, natural sand mortar exhibits a larger volume fraction of hard aggregates. The macroscopic logarithmic creep modulus for fine recycled concrete aggregate mortar is five times lower than that of natural sand mortar. Finally, the fracture toughness of fine recycled aggregate concrete is 8% lower than that of plain concrete.

Original language	English (US)
Article number	121107
Journal	Construction and Building Materials
Volume	266
DOIs	https://doi.org/10.1016/j.conbuildmat.2020.121107
State	Published - Jan 10 2021

Keywords

Creep indentation
Fracture toughness
Recycled aggregate concrete
Scratch test

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Materials Science(all)

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10.1016/j.conbuildmat.2020.121107

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title = "Basic creep and fracture response of fine recycled aggregate concrete",

abstract = "We investigate the basic creep and fracture response of fine recycled aggregate concrete using nanoscale mechanical characterization modules integrated with nonlinear micromechanical modeling and machine learning methods. Fine recycled concrete aggregate mortar exhibits a larger volume fraction of micropores and low-density calcium silicate hydrates compared to natural sand mortar. In return, natural sand mortar exhibits a larger volume fraction of hard aggregates. The macroscopic logarithmic creep modulus for fine recycled concrete aggregate mortar is five times lower than that of natural sand mortar. Finally, the fracture toughness of fine recycled aggregate concrete is 8% lower than that of plain concrete.",

keywords = "Creep indentation, Fracture toughness, Recycled aggregate concrete, Scratch test",

author = "Akono, {Ange Therese} and Jiaxin Chen and Mimi Zhan and Shah, {Surendra P.}",

note = "Funding Information: This work made use of the EPIC facility of Northwestern Universitys NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. We acknowledge the support from the China Scholarship Council. We are grateful for the support from Prof. Akono{\textquoteright}s Louis Berger Junior Professor Chair. We acknowledge the Walter P Murphy fellowship that has supported Jiaxin Chen{\textquoteright}s PhD studies. Publisher Copyright: {\textcopyright} 2020 The Authors",

year = "2021",

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doi = "10.1016/j.conbuildmat.2020.121107",

language = "English (US)",

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AU - Akono, Ange Therese

AU - Chen, Jiaxin

AU - Zhan, Mimi

AU - Shah, Surendra P.

N1 - Funding Information: This work made use of the EPIC facility of Northwestern Universitys NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. We acknowledge the support from the China Scholarship Council. We are grateful for the support from Prof. Akono’s Louis Berger Junior Professor Chair. We acknowledge the Walter P Murphy fellowship that has supported Jiaxin Chen’s PhD studies. Publisher Copyright: © 2020 The Authors

PY - 2021/1/10

Y1 - 2021/1/10

N2 - We investigate the basic creep and fracture response of fine recycled aggregate concrete using nanoscale mechanical characterization modules integrated with nonlinear micromechanical modeling and machine learning methods. Fine recycled concrete aggregate mortar exhibits a larger volume fraction of micropores and low-density calcium silicate hydrates compared to natural sand mortar. In return, natural sand mortar exhibits a larger volume fraction of hard aggregates. The macroscopic logarithmic creep modulus for fine recycled concrete aggregate mortar is five times lower than that of natural sand mortar. Finally, the fracture toughness of fine recycled aggregate concrete is 8% lower than that of plain concrete.

AB - We investigate the basic creep and fracture response of fine recycled aggregate concrete using nanoscale mechanical characterization modules integrated with nonlinear micromechanical modeling and machine learning methods. Fine recycled concrete aggregate mortar exhibits a larger volume fraction of micropores and low-density calcium silicate hydrates compared to natural sand mortar. In return, natural sand mortar exhibits a larger volume fraction of hard aggregates. The macroscopic logarithmic creep modulus for fine recycled concrete aggregate mortar is five times lower than that of natural sand mortar. Finally, the fracture toughness of fine recycled aggregate concrete is 8% lower than that of plain concrete.

KW - Creep indentation

KW - Fracture toughness

KW - Recycled aggregate concrete

KW - Scratch test

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Basic creep and fracture response of fine recycled aggregate concrete

Abstract

Keywords

ASJC Scopus subject areas

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