Disk-shaped compact tension test for asphalt concrete fracture

Wagoner, Michael P.; Buttlar, William G.; Paulino, Gláucio H.

doi:10.1007/bf02427951

Cited by 111 publications

(29 citation statements)

References 7 publications

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“…The utilization of disk-shaped compact tension (DCT) specimen geometry is common for the analysis of fracture energy by asphalt materials (Kim et al 2009;Wagnoner et al 2005;Wagoner et al 2006;Zofka and Braham 2009), whereas its use by plain concrete is very limited (Amirkhanian et al 2011(Amirkhanian et al , 2016) mainly due to the mentioned premature failures originated at the surrounding edge of the pulling holes.…”

Section: )mentioning

confidence: 99%

Modified Disk-Shaped Compact Tension Test for Measuring Concrete Fracture Properties

Cifuentes

Lozano

Holušová

et al. 2017

Int J Concr Struct Mater

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A new approach for measuring the specific fracture energy of concrete denoted modified disk-shaped compact tension (MDCT) test is presented. The procedure is based on previous ideas regarding the use of compact tension specimens for studying the fracture behavior of concrete but implies significant modifications of the specimen morphology in order to avoid premature failures (such as the breakage of concrete around the pulling load holes). The manufacturing and test performance is improved and simplified, enhancing the reliability of the material characterization. MDCT specimens are particularly suitable when fracture properties of already casted concrete structures are required. To evaluate the applicability of the MDCT test to estimate the size-independent specific fracture energy of concrete (G F ), the interaction between the fracture process zone of concrete and the boundary of the MDCTspecimens at the end of the test is properly analyzed. Further, the experimental results of G F obtained by MDCT tests for normal-and high-strength selfcompacting concrete mixes are compared with those obtained using the well-established three-point bending test. The procedure proposed furnishes promising results, and the G F values obtained are reliable enough for the specimen size range studied in this work.

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Section: )mentioning

confidence: 99%

Modified Disk-Shaped Compact Tension Test for Measuring Concrete Fracture Properties

Cifuentes

Lozano

Holušová

et al. 2017

Int J Concr Struct Mater

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“…Determination of the RVE size of a specimen is beyond the scope of this study. However, it can be noted from several previous studies that the RVE size of typical asphalt concrete mixtures with a NMAS of 12.5 mm is around 60 mm by 60 mm [35][36][37], while mixtures with greater NMAS should require a larger RVE size, typically, four times NMAS [38]. For the subsequent steps, 50 mm was chosen based on other studies and the low COV ( 10 %) value found in this study.…”

Section: Specimen Thickness (T)mentioning

confidence: 97%

Experimental-Statistical Investigation of Testing Variables of a Semicircular Bending (SCB) Fracture Test Repeatability for Bituminous Mixtures

Nsengiyumva

You

Kim

2017

Journal of Testing and Evaluation

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Given the fact that fracture is a primary distress causing pavement failure, it is important to identify and characterize the fracture/cracking properties of asphalt concrete mixtures and to include them in pavement design processes. This study examined the testing variables for a reliable and practical semicircular bending (SCB) fracture test to evaluate the fracture characteristics of asphalt concrete mixtures at intermediate service temperatures. An integrated experimental-statistical approach was employed to identify testing variables by which repeatable SCB test results can be achieved. Using a typical Nebraska asphalt mixture, five critical testing variables (i.e., the number of testing specimens, specimen thickness, notch length, loading rate, and testing temperature) of the SCB test were investigated due to their significant effects on mixture fracture characteristics. Statistical analysis of test results indicated that approximately six specimens/replicates were a reasonable sample size that could properly represent asphalt concrete fracture behavior of a typical dense-graded mixture. Then, the coefficient of variation (COV) of the mixture fracture energy for six specimens was used to evaluate the effects of other remaining test variables. A range of a specimen thickness of 40 to 60 mm, a notch length from 5 to 40 mm, and a testing temperature between 15 and 40 C showed the reasonably low COV value of fracture energy at around or less than 10 %. The loading rates (0.1 to 10 mm/min.) attempted in this study did not show any significant differences in the testing repeatability.

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“…In literature we can found that researchers used various geometries for measurement of concrete fracture properties , e.g. TPB [13,17], WST [4,21], the combination of TPB and WST [29][30], disk shaped compact tension [14,32] and another configurations can be found in handbooks e.g. [22,28].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, tests applied to concrete samples have not attained satisfactory results leading to the failure prematurely. Wagoner et al [32] carried out the CT test on concrete specimens and the premature failure was attained in 50% tested cases at the pulling load holes. Modify compact tension (MCT) test is a different version of CT test to reliably obtain the fracture properties of quasi-brittle materials (like the concrete).…”

Section: Introductionmentioning

confidence: 99%

Comparison of fracture toughness values of normal and high strength concrete determined by three point bend and modified disk-shaped compact tension specimens

Seitl

Ríos

Cifuentes

2017

Frattura Ed Integrità Strutturale

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ABSTRACT. The modified disk shaped compact tension test is a configuration derived from standard compact tension test that is used for measuring fracture mechanical properties of primarily metallic materials. The compact tension configuration is commonly used for measurement fracture mechanical properties as e.g. fracture toughness, Young's modulus, work of fracture etc. The modified compact tension tests imply significant modifications of the specimen morphology in order to avoid premature failure. The modified compact tension test is not proper for quasi-brittle materials due to its complicated shape (steel-concrete interface), but it is easily extracted from drill core and we do not need large amount of material for obtaining fracture properties as we need for e.g. three-or four-point bend test. Since it is a new test method, a wide range of tests is needed to be done before it can be applied. In the paper the selected outputs of the experiments performed on normal and high strength concrete will be processed and the values of fracture mechanical parameters will be discussed.

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Disk-shaped compact tension test for asphalt concrete fracture

Cited by 111 publications

References 7 publications

Modified Disk-Shaped Compact Tension Test for Measuring Concrete Fracture Properties

Modified Disk-Shaped Compact Tension Test for Measuring Concrete Fracture Properties

Experimental-Statistical Investigation of Testing Variables of a Semicircular Bending (SCB) Fracture Test Repeatability for Bituminous Mixtures

Comparison of fracture toughness values of normal and high strength concrete determined by three point bend and modified disk-shaped compact tension specimens

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