Creep Behavior of High-Strength Concrete with Polypropylene Fibers at Elevated Temperatures

Wu, Bo; Lam, Eddie Siu-Shu; Liu, Qun; Chung, Wilson Yuk-ming; Ho, I.F.Y.

doi:10.14359/51663581

Cited by 4 publications

(1 citation statement)

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“…The majority of the research are concentrated on plain concrete subjected to a uniaxial compressive load. Some researches on concrete reinforced with polypropylene fibres (PP) ( [7], [8]) were carried out demonstrating an increase in transient creep due to concrete porosity as a result of fibres melting. In Eurocode 2 [9], transient creep is implicit in the model and is limited to plain concrete.…”

Section: Introductionmentioning

confidence: 99%

Load Induced Thermal Strains in Steel Fibre Reinforced Concrete Subjected to Uniaxial Compression

Buttignol

Colombo

Prisco

2016

KEM

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The effect of fibre reinforcement on Load Induced Thermal Strains (LITS) has not yet been significantly investigated up to now. Creep is becoming a key research topic only in the last few years. A semi-empirical model able to take into account both the thermo-mechanical damage associated to coarse aggregates and the thermo-chemical damage induced in the matrix and calibrated on the basis of the main results on plain concrete available in the scientific literature is presented. Some tests in uniaxial compression on Fibre Reinforced Concrete (FRC) cylinders characterized by a long age – 11-years-old – have been investigated and compared with the model to highlight fibre effects, if any. The uniaxial compressive strength at 28 days of the SFRC was 75 MPa; the specimens after 11 years showed a compressive strength exceeding 110 MPa. A strong increase of SLS residual strength was observed in post-cracking tension due to the long aging, while ULS residual strengths weakly increased. The cylindrical specimens were exposed to a maximum temperature of 200°C and 400°C and loaded with two load thresholds corresponding to 20% and 40% of the compressive strength detected at 28 days of aging, that means about 12.5% and 25% of the 11-years-old specimens. Two paths were investigated: pre-heated specimens up to 200°C or 400°C, then loaded with a compression stress equal to 0.2fc,28 and 0.4fc,28; and pre-loaded specimens up to 0.2fc,28 and 0.4fc,28 and then heated up to 200°C or 400°C. The duration of each test did not exceed 12 hours. Two main fibre effects were observed: a significant reduction of irreversible strains when the specimens were loaded and then heated and cooled and a different evolution in LITS passing from 200°C to 400°C, characterized by a significant reduction of the expected deformation.

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Section: Introductionmentioning

confidence: 99%

Load Induced Thermal Strains in Steel Fibre Reinforced Concrete Subjected to Uniaxial Compression

Buttignol

Colombo

Prisco

2016

KEM

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Mechanical Properties

Pimienta

Mindeguia

Debicki³

et al. 2018

Physical Properties and Behaviour of High-Performance Concrete at High Temperature

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This chapter report the most recent experimental results on mechanical behaviour at high temperature of high-performance concretes. After a short introduction, Sect. 5.2 describes the main testing methods that were used in the analysed studies. Section 5.3 collects and compares the temperature-dependency of the compressive strength and modulus of elasticity of many experimental studies. The influence of parameters such as the initial compressive strength, the type of aggregate, the presence of additions, the W/C ratio, the moisture content and the way the mechanical test was performed is analysed. Section 5.4 presents the experimental results obtained under a constant temperature, i.e. creep tests at high temperature.

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Post-fire optimum mechanical properties of self-compacting mortar using Taguchi method and analysis of variance

Zahedi

Dehestani

2022

Construction and Building Materials

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Creep Behavior of High-Strength Concrete with Polypropylene Fibers at Elevated Temperatures

Cited by 4 publications

References 0 publications

Load Induced Thermal Strains in Steel Fibre Reinforced Concrete Subjected to Uniaxial Compression

Load Induced Thermal Strains in Steel Fibre Reinforced Concrete Subjected to Uniaxial Compression

Mechanical Properties

Post-fire optimum mechanical properties of self-compacting mortar using Taguchi method and analysis of variance

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