size effect in normal and highstrength concrete

SIZE EFFECT IN NORMAL AND HIGH-STRENGTH CONCRETE

The Size Effect in normal strength concrete (NSC) is a phenomenon explained by a combination of plasticity and fracture mechanics, and it is related to the energy balance during the damage/fracture process which causes a change

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Size Effect in Normal- and High-Strength Concrete with ...

Sep 09, 2009  The geometrically similar columns of large (λ = 32), medium (λ = 16), and small (λ = 8) slenderness using a size range of 1:2:4:8 (8 for only medium slenderness) were tested. The study’s columns were built of normal- and high-strength concrete, in which the maximum aggregate size was 10 mm. A strong size effect was observed in the results.

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Size effect in normal- and high-strength amorphous ...

Sep 15, 2016  This indicates that the use of amorphous metallic and steel fibers is effective in reducing the size effect on the flexural strength of normal- and high-strength concretes. The inherent brittleness is the primary reason for the presence of the size effect in concrete.

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Size effect in normal- and high-strength amorphous ...

High-strength concrete was more sensitive to the size effect on flexural strength than normal-strength concrete, whereas less sensitivity to the size effect was observed with an

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SIZE EFFECT IN NORMAL AND HIGH-STRENGTH

The Size Effect in normal strength concrete (NSC) is a phenomenon explained by a combination of plasticity and fracture mechanics, and it is related to the energy balance during the damage/fracture process which causes a change

get price

Size Effect in Normal- and High-Strength Concrete with ...

Sep 09, 2009  The geometrically similar columns of large (λ = 32), medium (λ = 16), and small (λ = 8) slenderness using a size range of 1:2:4:8 (8 for only medium slenderness) were tested. The study’s columns were built of normal- and high-strength concrete, in which the maximum aggregate size was 10 mm. A strong size effect was observed in the results.

get price

Size Effect in Normal- and High-Strength Concrete with ...

The study's columns were built of normal- and high-strength concrete, in which the maximum aggregate size was 10 mm. A strong size effect was observed in the results. It is shown that, with increasing strength, the size effect becomes more pronounced as the brittleness is increased. Availability: Find a library where document is available.

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Size Effect in Normal and High-Strength Concrete with ...

Moreover, most of the experimental efforts have concentrated on the size effect of RC members with normal-strength concrete (NSC) rather than with high-strength concrete (HSC) (e.g. the efforts in ...

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Dynamic Size Effect in Normal- and High-Strength Concrete ...

Mar 01, 2005  Title: Dynamic Size Effect in Normal- and High-Strength Concrete Cylinders Author(s): Motaz M. Elfahal and Theodor Krauthammer Publication: Materials Journal Volume: 102 Issue: 2 Appears on pages(s): 77-85 Keywords: failure; high-strength concrete; impact; size effect Date: 3/1/2005 Abstract: The size-effect phenomenon was investigated numerically and experimentally on both normal

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Size Effect on Nominal Strength of Lightweight and Normal ...

Dec 12, 2020  The main content of this work is to explore the failure and size effect of lightweight aggregate concrete-filled steel tube (LWACFST) columns under uniaxial compression. A three-dimesnional mesoscale simulation approach considering concrete heterogeneity was developed, in which the ideal bond was assumed between the steel tube and inner concretes.

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Size effect in normal- and high-strength amorphous ...

High-strength concrete was more sensitive to the size effect on flexural strength than normal-strength concrete, whereas less sensitivity to the size effect was observed with an

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EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON

The effects of aggregate type, size, and content on the behavior of normal and high-strength concrete, and the relationships between compressive strength, flexural

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Fatigue Fracture of High-Strength Concrete and Size Effect

The results of an experimental study of fatigue fracture of geometrically similar high-strength concrete specimens of very different sizes are reported and analyzed. Three-point bend notched beams were subjected to cyclic loading. The number of cycles to failure ranged from 200 to 41,000. It was found that Paris law for the crack length increment per cycle as a function of the stress intensity ...

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Fatigue fracture of high-strength concrete and size effect ...

However, for specimens of different sizes, an adjustment for the size effect needs to be introduced, of a similar type as previously introduced for normal concrete. AB - Results of an experimental study of fatigue fracture og geometrically similar high-strength concrete specimens of very different sizes are reported and analyszed.

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Size effect on structural strength - Wikipedia

The statistical size effect occurs for a broad class of brittle structures that follow the weakest-link model. This model means that macro-fracture initiation from one material element, or more precisely one representative volume element (RVE), causes the whole structure to fail, like the failure of one link in a chain (Fig. 1a). Since the material strength is random, the strength of the ...

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Experimental Investigation on the Effect of Steel Fibers ...

In this study, an experimental work was directed toward comparing the flexural behavior of solid and hollow steel fiber-reinforced concrete beams. For this purpose, eight square cross-sectional beam specimens, four solid and four hollow, were prepared. One concrete mixture with four different steel fiber contents of 0, 0.5, 1.0, and 1.5#x0025; were used. The side length of the central square ...

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(PDF) Agricultural wastes as aggregate in concrete ...

Table 2 shows some selected mix proportions of OPS con- crete with normal and high strength concrete. For all the OPS light- weight concrete mixtures with normal strength, the maximum size of OPS (as coarse aggregate) is 9.5 mm or more while for making high strength OPS concrete this maximum size reduces to 8 mm.

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Search results for: concrete coupons

Keywords: Concrete, Czech Republic, pavements, recycled concrete aggregate, RCA, standards. Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1018 722 A Study on Behaviour of Normal Strength Concrete and High Strength Concrete Subjected to Elevated Temperatures

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Size Effect in Normal and High-Strength Concrete with ...

Moreover, most of the experimental efforts have concentrated on the size effect of RC members with normal-strength concrete (NSC) rather than with high-strength concrete (HSC) (e.g. the efforts in ...

get price

Size Effect in Normal- and High-Strength Concrete with ...

The study's columns were built of normal- and high-strength concrete, in which the maximum aggregate size was 10 mm. A strong size effect was observed in the results. It is shown that, with increasing strength, the size effect becomes more pronounced as the brittleness is increased. Availability: Find a library where document is available.

get price

Fatigue fracture of high-strength concrete and size effect ...

However, for specimens of different sizes, an adjustment for the size effect needs to be introduced, of a similar type as previously introduced for normal concrete. AB - Results of an experimental study of fatigue fracture og geometrically similar high-strength concrete specimens of very different sizes are reported and analyszed.

get price

EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON

The effects of aggregate type, size, and content on the behavior of normal and high-strength concrete, and the relationships between compressive strength, flexural

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Effect of Maximum Aggregate Size on the Strength of Normal ...

The American design method was adopted ACI 211.1, for normal concrete. ACI 211-4R, the design method was adopted for high strength concrete. And use the MSCA with dimensions (9.5, 12.5, 19, 25, 37.5, and 50) mm for normal strength concrete and the MSCA (9.5, 12.5, 19, and 25) mm for high strength concrete.

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Experimental Investigation of Size Effect on Inplane Shear ...

Experimental Investigation of Size Effect on Inplane Shear Strength of Normal, Self Compacting and High Strength Concrete from Push Off Test Harish Kumar N R 1, 3Murali A M2, Dr. Nagaraj K P , Dr. Prabhakara R4 1 Research Scholar, Civil Engineering, M.S.Ramaiah Institute

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ACI MATERIALS JOURNAL TECHNICAL PAPER Fracture

LEFM. As a result, there is a considerable size effect on the failure of normal concrete structures and speci­ mens, but it is not as strong as that of LEFM. This transitional size effect is described by Eq. (1). The size-effect law [Eq. (1»), giving the approximate relation of

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Fatigue Fracture of High-Strength Concrete and Size Effect

The results of an experimental study of fatigue fracture of geometrically similar high-strength concrete specimens of very different sizes are reported and analyzed. Three-point bend notched beams were subjected to cyclic loading. The number of cycles to failure ranged from 200 to 41,000. It was found that Paris law for the crack length increment per cycle as a function of the stress intensity ...

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Experimental and numerical investigations on the size ...

May 10, 2017  Koç, V, Şener, S (2009) Size effect in normal- and high-strength concrete with different notches under the axial load. Journal of Materials in Civil Engineering 21: 433 – 445. Google Scholar Crossref

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(PDF) Effect of Specimen Size and Shape on Strength of ...

It is completely identified that the deformation and intensity of reinforced concrete beams depend on the size of the beam. Effect of concrete types (normal 26MPa, high 46 MPa, and ultra-high ...

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Fracture properties and brittleness of high-strength concrete

The size-effect method for determining material fracture characteristics, as previously proposed by Bazant and extensively verified for normal strength concrete, is applied to typical high-strength concrete. Geometrically similar three-point bending specimens are tested and the measured peak load values are used to obtain the fracture energy ...

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Effects of Size and Curing on Cylinder ... - Concrete

Jul 01, 1994  The beneficial effects of preventing moisture loss and water-curing are directly observed in the test results. The increased apparent strengths with decreasing cylinder size are also presented. Relationships for compressive strength gain are given for normal strength, high-strength, and very high-strength concretes studied, and for different ...

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Size effect on structural strength - Wikipedia

The statistical size effect occurs for a broad class of brittle structures that follow the weakest-link model. This model means that macro-fracture initiation from one material element, or more precisely one representative volume element (RVE), causes the whole structure to fail, like the failure of one link in a chain (Fig. 1a). Since the material strength is random, the strength of the ...

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Strength

The maximum size of a well-graded coarse aggregate of a given mineralogy can have two opposing effects on the strength of normal concrete. With the same cement content and consistency, concrete mixtures containing larger aggregate particles require less

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