The effect of water to cement ratio on fracture parameters and brittleness of self-compacting concrete

Beygi, M.H.A.; Kazemi, Mohammad Taghi; Nikbin, Iman M.; Amiri, Javad Vaseghi

doi:10.1016/j.matdes.2013.02.018

Cited by 160 publications

(53 citation statements)

References 34 publications

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“…8 the most important parameter affecting l ch is the tensile strength since the ductility of concrete decreases as w/cm ratio decreases, causing SCC to have less ductile (or more brittle) behavior. This effect was confirmed by other authors (27) and it can be attributed to the change in concrete fractal dimension (34) due to a higher rupture in aggregate phase for high-strength SCC mixes.…”

Section: Ductilitysupporting

confidence: 83%

“…Only in case of NS-C and HS mixes, l ch tend to decrease when the CA fraction decreases due to the strong effect of the CA obtained for these mixes. The increase of G F with the increase of the coarse aggregate fraction is clear as demonstrated in this study and previous work from other authors (27). As regards the tensile strength of SCC for each grade there is no definite trend with the CA fraction (25), which produces a fluctuation of the values of l ch with CA for each grade due to its great influence in Eq.…”

Section: Ductilitysupporting

confidence: 63%

“…On the other hand, an increase in the compressive strength should provide an increase in the specific fracture energy since a decrease in the water to binder (w/cm) ratio decreases the values of G F as demonstrated by Beygi et al (27). Although the range of variation of the coarse aggregate fraction is not the same for the different groups of SCC here analyzed, a comparison of the results of mix NS-A with those of NS-B and NS-C reveals an increase in G F when the w/cm ratio is decreased (Fig.…”

Section: Influence Of the MIX Composition And Strength On Fracture Enmentioning

confidence: 95%

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Effect of mix design on the size-independent fracture energy of normal- and high-strength self-compacting concrete

Cifuentes¹,

Ríos²,

Gómez³

2018

Mater. construcc.

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Self-compacting concrete has a characteristic microstructure inherent to its specific composition. The higher content of fine particles in self-compacting concrete relative to the equivalent vibrated concrete produces a different fracture behavior that affects the main fracture parameters. In this work, a comprehensive experimental investigation of the fracture behavior of self-compacting concrete has been carried out. Twelve different self-compacting concrete mixes with compressive strength ranging from 39 to 124 MPa (wider range than in other studies) have been subjected to three-point bending tests in order to determine the specific fracture energy. The influence of the mix design and its composition (coarse aggregate fraction, the water to binder ratio and the paste to solids ratio) on its fracture behavior has been analyzed. Moreover, further evidence of the objectivity of the size-independent fracture energy results, obtained by the two most commonly used methods, has been provided on the self-compacting concrete mixes. RESUMEN:Influencia de la composición de la mezcla sobre la energía de fractura de hormigones autocompactantes de resistencias media y alta. Los hormigones autocompactantes tienen una microestructura interna inherente a su composición específica. Su mayor contenido de partículas finas, en comparación con hormigones vibrados equivalentes, provoca un comportamiento diferente en fractura que afecta a los principales parámetros de fractura. En este trabajo, se ha realizado una amplia investigación experimental del comportamiento en fractura de hormigones autocompactantes. Así, se han realizado ensayos de flexión en tres puntos para determinar sus propiedades de fractura sobre 12 hormigones autocompactantes de diferente composición, con resistencias a compresión que van desde 39 hasta 124 MPa (mayor que en otros estudios). De esta forma, se ha analizado la influencia de la dosificación del hormigón y su composición (contenido en árido grueso, relación agua-cemento y pasta-sólidos) sobre su comportamiento en fractura. Además, se ha validado, para hormigones autocompactantes, la objetividad de los resultados obtenidos mediante los dos métodos habitualmente empleados para la determinación de la energía de fractura.

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Section: Ductilitysupporting

confidence: 83%

Section: Ductilitysupporting

confidence: 63%

Section: Influence Of the MIX Composition And Strength On Fracture Enmentioning

confidence: 95%

See 1 more Smart Citation

Effect of mix design on the size-independent fracture energy of normal- and high-strength self-compacting concrete

Cifuentes¹,

Ríos²,

Gómez³

2018

Mater. construcc.

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“…The fracture energy can be defined as the amount of the absorbed energy to form one unit area of a crack (Beygi et al 2013;Pająk and Ponikiewski 2013). By dividing the total dissipated energy with the initial ligament area, the fracture energy is obtained as following expression:…”

Section: Fracture Energymentioning

confidence: 99%

Anchorage Effects of Various Steel Fibre Architectures for Concrete Reinforcement

Abdallah

Fan

Zhou

et al. 2016

Int J Concr Struct Mater

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This paper studies the effects of steel fibre geometry and architecture on the cracking behaviour of steel fibre reinforced concrete (SFRC), with the reinforcements being four types, namely 5DH (Dramix Ò hooked-end), 4DH, 3DH-60 and 3DH-35, of various hooked-end steel fibres at the fibre dosage of 40 and 80 kg/m 3 . The test results show that the addition of steel fibres have little effect on the workability and compressive strength of SFRC, but the ultimate tensile loads, post-cracking behaviour, residual strength and the fracture energy of SFRC are closely related to the shapes of fibres which all increased with increasing fibre content. Results also revealed that the residual tensile strength is significantly influenced by the anchorage strength rather than the number of the fibres counted on the fracture surface. The 5DH steel fibre reinforced concretes have behaved in a manner of multiple crackings and more ductile compared to 3DH and 4DH ones, and the end-hooks of 4DH and 5DH fibres partially deformed in steel fibre reinforced self-compacting concrete (SFR-SCC). In practice, 5DH fibres should be used for reinforcing high or ultra-high performance matrixes to fully utilize their high mechanical anchorage.

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“…Flexural toughness, in fact, refers to the area under loaddeflection curve. The amount of flexural toughness of a concrete beam is known as the absorbed energy of the concrete [18]. The fracture energy is defined as the amount of energy necessary to create a crack of unit surface area projected in a plane parallel to the crack direction [19,20].…”

Section: Fracture Toughness and Ctod Cmentioning

confidence: 99%

Experimental Evaluation of Mechanical Properties and Fracture Behavior of Carbon Fiber Reinforced High Strength Concrete

Kizilkanat

2016

Period. Polytech. Civil Eng.

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The effect of water to cement ratio on fracture parameters and brittleness of self-compacting concrete

Cited by 160 publications

References 34 publications

Effect of mix design on the size-independent fracture energy of normal- and high-strength self-compacting concrete

Effect of mix design on the size-independent fracture energy of normal- and high-strength self-compacting concrete

Anchorage Effects of Various Steel Fibre Architectures for Concrete Reinforcement

Experimental Evaluation of Mechanical Properties and Fracture Behavior of Carbon Fiber Reinforced High Strength Concrete

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