Constitutive relationships for CNF-reinforced engineered cementitious composites and CNF-reinforced lightweight engineered cementitious composites at ambient and elevated temperatures

Fatemeh Hamidi, Farhad Aslani

Research output: Contribution to journalArticle

Abstract

Owing to their unique mechanical performance for both seismic and non-seismic applications, carbon nanofiber (CNF)-reinforced engineered cementitious composites (ECCs) and CNF-reinforced lightweight ECCs (LWECCs) have been received great attentions since their introduction. Due to the crucial roles of material selection and environmental conditions on the mechanical performance of cementitious composites, and thus, the structural performance during the service life of civil engineering structures, analytical studies establishing the constitutive relationships for the mechanical properties of any cementitious composite are of great importance. In this study, the constitutive relationships for the mechanical properties of CNF-reinforced ECC, as well as, hollow glass microsphere (HGM)-based LWECC and CNF-reinforced HGM-based LWECC have been developed. The proposed models include compressive strength, flexural strength, and compressive stress–strain relationships at both ambient and elevated temperatures. Furthermore, the available experimental results have been applied so that the generality and workability of the established models can be evaluated. The results indicated that to establish more reliable and accurate constitutive relationships, more researches and experimental data for CNF-reinforced ECC and LWECC with and without CNF reinforcements are essential.

Original languageEnglish
JournalStructural Concrete
DOIs
Publication statusE-pub ahead of print - 12 Nov 2019

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Carbon nanofibers
Composite materials
Microspheres
Temperature
Glass
Mechanical properties
Civil engineering
Service life
Bending strength
Compressive strength
Reinforcement

Cite this

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title = "Constitutive relationships for CNF-reinforced engineered cementitious composites and CNF-reinforced lightweight engineered cementitious composites at ambient and elevated temperatures",
abstract = "Owing to their unique mechanical performance for both seismic and non-seismic applications, carbon nanofiber (CNF)-reinforced engineered cementitious composites (ECCs) and CNF-reinforced lightweight ECCs (LWECCs) have been received great attentions since their introduction. Due to the crucial roles of material selection and environmental conditions on the mechanical performance of cementitious composites, and thus, the structural performance during the service life of civil engineering structures, analytical studies establishing the constitutive relationships for the mechanical properties of any cementitious composite are of great importance. In this study, the constitutive relationships for the mechanical properties of CNF-reinforced ECC, as well as, hollow glass microsphere (HGM)-based LWECC and CNF-reinforced HGM-based LWECC have been developed. The proposed models include compressive strength, flexural strength, and compressive stress–strain relationships at both ambient and elevated temperatures. Furthermore, the available experimental results have been applied so that the generality and workability of the established models can be evaluated. The results indicated that to establish more reliable and accurate constitutive relationships, more researches and experimental data for CNF-reinforced ECC and LWECC with and without CNF reinforcements are essential.",
keywords = "CNF-reinforced ECC, CNF-reinforced LWECC, constitutive stress–strain relationships, ECC, elevated temperatures, LWECC",
author = "Fatemeh Hamidi and Farhad Aslani",
year = "2019",
month = "11",
day = "12",
doi = "10.1002/suco.201900268",
language = "English",
journal = "Structural Concrete",
issn = "0307-8434",
publisher = "Wiley Blackwell",

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T1 - Constitutive relationships for CNF-reinforced engineered cementitious composites and CNF-reinforced lightweight engineered cementitious composites at ambient and elevated temperatures

AU - Hamidi, Fatemeh

AU - Aslani, Farhad

PY - 2019/11/12

Y1 - 2019/11/12

N2 - Owing to their unique mechanical performance for both seismic and non-seismic applications, carbon nanofiber (CNF)-reinforced engineered cementitious composites (ECCs) and CNF-reinforced lightweight ECCs (LWECCs) have been received great attentions since their introduction. Due to the crucial roles of material selection and environmental conditions on the mechanical performance of cementitious composites, and thus, the structural performance during the service life of civil engineering structures, analytical studies establishing the constitutive relationships for the mechanical properties of any cementitious composite are of great importance. In this study, the constitutive relationships for the mechanical properties of CNF-reinforced ECC, as well as, hollow glass microsphere (HGM)-based LWECC and CNF-reinforced HGM-based LWECC have been developed. The proposed models include compressive strength, flexural strength, and compressive stress–strain relationships at both ambient and elevated temperatures. Furthermore, the available experimental results have been applied so that the generality and workability of the established models can be evaluated. The results indicated that to establish more reliable and accurate constitutive relationships, more researches and experimental data for CNF-reinforced ECC and LWECC with and without CNF reinforcements are essential.

AB - Owing to their unique mechanical performance for both seismic and non-seismic applications, carbon nanofiber (CNF)-reinforced engineered cementitious composites (ECCs) and CNF-reinforced lightweight ECCs (LWECCs) have been received great attentions since their introduction. Due to the crucial roles of material selection and environmental conditions on the mechanical performance of cementitious composites, and thus, the structural performance during the service life of civil engineering structures, analytical studies establishing the constitutive relationships for the mechanical properties of any cementitious composite are of great importance. In this study, the constitutive relationships for the mechanical properties of CNF-reinforced ECC, as well as, hollow glass microsphere (HGM)-based LWECC and CNF-reinforced HGM-based LWECC have been developed. The proposed models include compressive strength, flexural strength, and compressive stress–strain relationships at both ambient and elevated temperatures. Furthermore, the available experimental results have been applied so that the generality and workability of the established models can be evaluated. The results indicated that to establish more reliable and accurate constitutive relationships, more researches and experimental data for CNF-reinforced ECC and LWECC with and without CNF reinforcements are essential.

KW - CNF-reinforced ECC

KW - CNF-reinforced LWECC

KW - constitutive stress–strain relationships

KW - ECC

KW - elevated temperatures

KW - LWECC

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