Matrix design of light weight, high strength, high ductility ECC

In the past decade, the research on high strength, high ductility engineered cementitious composites (HSHD-ECC) has drawn much attention worldwide. However, due to the high matrix toughness associated with HSHD-ECC, saturated multiple cracking phenomena was rarely observed, hence hindering its robus...

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Main Authors: Zhang, Zhigang, Yuvaraj, Ananya, Di, Jin, Qian, Shunzhi
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2020
Subjects:
ECC
Online Access:https://hdl.handle.net/10356/143060
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1430602021-03-23T04:48:14Z Matrix design of light weight, high strength, high ductility ECC Zhang, Zhigang Yuvaraj, Ananya Di, Jin Qian, Shunzhi School of Civil and Environmental Engineering Engineering::Environmental engineering ECC Matrix Design In the past decade, the research on high strength, high ductility engineered cementitious composites (HSHD-ECC) has drawn much attention worldwide. However, due to the high matrix toughness associated with HSHD-ECC, saturated multiple cracking phenomena was rarely observed, hence hindering its robustness and high strain capacity. In this paper, ECC mixtures with relatively weak matrix were designed to allow much more cracks to be initiated, meanwhile retaining features of high strength, high ductility as well as light weight. The experimental results showed that ECC mixtures with addition of air entraining agent (AEA) increases the compressive/tensile strength slightly, while adding light weight filler (LWF) materials into ECC mixtures show the opposite tendency. However, all ECC mixtures exceed 60 MPa in compressive strength that satisfy the requirement of high strength concrete. In addition, incorporating AEA and LWF materials into HSHD-ECC lowered its matrix toughness and density effectively, as a result, increased its strain capacity and extent of saturated cracking significantly. In particular, the strain capacity of HSHD-ECC with addition of fly ash cenosphere (FAC) could reach 12.5%. At micro-scale level, the fiber/matrix interfacial frictional bond was altered with the matrix design in HSHD-ECC, and the experimental findings well explained the change tendency in tensile strength of five ECC mixtures based on micromechanics theory. Ministry of Education (MOE) Nanyang Technological University Accepted version The authors would like to acknowledge the financial support from MOE Tier1 (RG87/15) and School of CEE Research Staff Funding Support for Assistant Professors. The first author would like to graciously thank 111 Project of China (Grant No. B18062), and the National Natural Science Foundation of China (Grant No.51708061), and the Science and Technology Research Program of Chongqing Municipal Education Commission (Grant No.KJQN201800 126) for partial financial support of this work. 2020-07-27T06:17:51Z 2020-07-27T06:17:51Z 2019 Journal Article Zhang, Z., Yuvaraj, A., Di, J. & Qian, S. (2019). Matrix design of light weight, high strength, high ductility ECC. Construction and Building Materials, 210, 188-197. https://dx.doi.org/10.1016/j.conbuildmat.2019.03.159 0950-0618 https://hdl.handle.net/10356/143060 10.1016/j.conbuildmat.2019.03.159 2-s2.0-85063028996 210 188 197 en Construction and Building Materials © 2019 Elsevier Ltd. All rights reserved. This paper was published in Construction and Building Materials and is made available with permission of Elsevier Ltd. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Environmental engineering
ECC
Matrix Design
spellingShingle Engineering::Environmental engineering
ECC
Matrix Design
Zhang, Zhigang
Yuvaraj, Ananya
Di, Jin
Qian, Shunzhi
Matrix design of light weight, high strength, high ductility ECC
description In the past decade, the research on high strength, high ductility engineered cementitious composites (HSHD-ECC) has drawn much attention worldwide. However, due to the high matrix toughness associated with HSHD-ECC, saturated multiple cracking phenomena was rarely observed, hence hindering its robustness and high strain capacity. In this paper, ECC mixtures with relatively weak matrix were designed to allow much more cracks to be initiated, meanwhile retaining features of high strength, high ductility as well as light weight. The experimental results showed that ECC mixtures with addition of air entraining agent (AEA) increases the compressive/tensile strength slightly, while adding light weight filler (LWF) materials into ECC mixtures show the opposite tendency. However, all ECC mixtures exceed 60 MPa in compressive strength that satisfy the requirement of high strength concrete. In addition, incorporating AEA and LWF materials into HSHD-ECC lowered its matrix toughness and density effectively, as a result, increased its strain capacity and extent of saturated cracking significantly. In particular, the strain capacity of HSHD-ECC with addition of fly ash cenosphere (FAC) could reach 12.5%. At micro-scale level, the fiber/matrix interfacial frictional bond was altered with the matrix design in HSHD-ECC, and the experimental findings well explained the change tendency in tensile strength of five ECC mixtures based on micromechanics theory.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Zhang, Zhigang
Yuvaraj, Ananya
Di, Jin
Qian, Shunzhi
format Article
author Zhang, Zhigang
Yuvaraj, Ananya
Di, Jin
Qian, Shunzhi
author_sort Zhang, Zhigang
title Matrix design of light weight, high strength, high ductility ECC
title_short Matrix design of light weight, high strength, high ductility ECC
title_full Matrix design of light weight, high strength, high ductility ECC
title_fullStr Matrix design of light weight, high strength, high ductility ECC
title_full_unstemmed Matrix design of light weight, high strength, high ductility ECC
title_sort matrix design of light weight, high strength, high ductility ecc
publishDate 2020
url https://hdl.handle.net/10356/143060
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