Reinforced SCC one-way slabs: time-dependent flexural cracking control

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Abstract

Fibre-reinforced self-compacting concrete (FRSCC) is a high-performance building material that combines the positive aspects of the fresh properties of self-compacting concrete (SCC) with the improved characteristics of hardened concrete as a result of fibre addition. To produce SCC, either the constituent materials or the corresponding mix proportions may notably differ from conventional concrete (CC). Therefore, it is vital to investigate whether all the assumed hypotheses about CC are also valid for SCC structures. This paper reports a study in which eight SCC and FRSCC slabs of similar cross-section were monitored under service loads for up to 240 d. The recorded time-dependent cracking and deflections are presented. The steel strains within the high-moment regions, the concrete surface strains at the tensile steel level, deflection at the mid-span, crack widths and crack spacing were recorded throughout the testing period. The experimental results show that the instantaneous crack widths and spacings for the normal SCC slab series were close to and much less than, respectively, the corresponding variables for the normal CC slab series.
Original languageEnglish
Pages (from-to)55-73
Number of pages19
JournalProceedings of the Institution of Civil Engineers: Structures and Buildings
Volume172
Issue number1
Early online dateMar 2018
DOIs
Publication statusPublished - 2019

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Self compacting concrete
Reinforced concrete
Concrete slabs
Concretes
Cracks
Fibers
Steel
Concrete construction
Testing

Cite this

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title = "Reinforced SCC one-way slabs: time-dependent flexural cracking control",
abstract = "Fibre-reinforced self-compacting concrete (FRSCC) is a high-performance building material that combines the positive aspects of the fresh properties of self-compacting concrete (SCC) with the improved characteristics of hardened concrete as a result of fibre addition. To produce SCC, either the constituent materials or the corresponding mix proportions may notably differ from conventional concrete (CC). Therefore, it is vital to investigate whether all the assumed hypotheses about CC are also valid for SCC structures. This paper reports a study in which eight SCC and FRSCC slabs of similar cross-section were monitored under service loads for up to 240 d. The recorded time-dependent cracking and deflections are presented. The steel strains within the high-moment regions, the concrete surface strains at the tensile steel level, deflection at the mid-span, crack widths and crack spacing were recorded throughout the testing period. The experimental results show that the instantaneous crack widths and spacings for the normal SCC slab series were close to and much less than, respectively, the corresponding variables for the normal CC slab series.",
author = "Farhad Aslani",
year = "2019",
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language = "English",
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pages = "55--73",
journal = "Institution of Civil Engineers. Proceedings. Structures and Buildings",
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TY - JOUR

T1 - Reinforced SCC one-way slabs

T2 - time-dependent flexural cracking control

AU - Aslani, Farhad

PY - 2019

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AB - Fibre-reinforced self-compacting concrete (FRSCC) is a high-performance building material that combines the positive aspects of the fresh properties of self-compacting concrete (SCC) with the improved characteristics of hardened concrete as a result of fibre addition. To produce SCC, either the constituent materials or the corresponding mix proportions may notably differ from conventional concrete (CC). Therefore, it is vital to investigate whether all the assumed hypotheses about CC are also valid for SCC structures. This paper reports a study in which eight SCC and FRSCC slabs of similar cross-section were monitored under service loads for up to 240 d. The recorded time-dependent cracking and deflections are presented. The steel strains within the high-moment regions, the concrete surface strains at the tensile steel level, deflection at the mid-span, crack widths and crack spacing were recorded throughout the testing period. The experimental results show that the instantaneous crack widths and spacings for the normal SCC slab series were close to and much less than, respectively, the corresponding variables for the normal CC slab series.

U2 - 10.1680/jstbu.17.00127

DO - 10.1680/jstbu.17.00127

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JO - Institution of Civil Engineers. Proceedings. Structures and Buildings

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