New approach of concrete tensile strength test

Resan, Sa’ad Fahad; Chassib, Samir M.; Zemam, Sajid Kamil; Madhi, Mustafa Jabar

doi:10.1016/j.cscm.2020.e00347

Cited by 22 publications

(18 citation statements)

References 5 publications

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“…However, research is still looking for simple and adequate test methods which could be applied in practice. The new method of testing tensile strength of concrete has been recently proposed by Resan et al [ 20 ] and Liao et al [ 21 ].…”

Section: Materials and Methods Tensile Strength Of Concrete—test Methods And Size Effectmentioning

confidence: 99%

Length Effect at Testing Splitting Tensile Strength of Concrete

Słowik

Akram

2021

Materials

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Tensile strength of concrete is the basic property when estimating the cracking resistance of the structure and when analysing fracture processes in concrete. The most common way of testing tensile strength is the Brazilian method. It has been noticed that the shape and size of specimens influence the tensile splitting strength. The experiments were performed to investigate the impact of cylinder’s length on tensile concrete strength received in the Brazilian method. During the experiment the tensile concrete strength was tested on two different sizes cylindrical specimens: 150 mm × 150 mm and 150 mm × 300 mm. Experiments were performed in two stages, with two types of maximum aggregate size: 16 mm and 22 mm. The software “Statistica” was used to perform the broad scale statistical analysis. When comparing test results for shorter and longer specimens, the increase of tensile splitting strength tested on shorter cylinders was observed (approximately 5%). However, when performing deeper statistical analysis, it has been found that the length effect was not sensitive to the strength of the cement matrix and the type of aggregate but was influenced by the aggregate size. Further experiments are needed in order to perform a multi-parameter statistical analysis of scale effect when testing the splitting tensile strength of concrete.

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Section: Materials and Methods Tensile Strength Of Concrete—test Methods And Size Effectmentioning

confidence: 99%

Length Effect at Testing Splitting Tensile Strength of Concrete

Słowik

Akram

2021

Materials

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“…In a direct tension test, both ends of the specimen are clamped firmly, which causes local stress concentration and possible eccentricity of loading. Due to the heterogeneous behavior of the concrete, getting damage to the specimen on both sides and other unexpected locations is also possible [4,5,[13][14][15]. Some kinds of direct tension test were proposed before, including the Three Jack Solution [16], Embedded Threaded Rod Method [17], Gluing and Gripping Test [18], and Triangular Loading Frame Method [19].…”

Section: Direct Tension Testmentioning

confidence: 99%

“…The interface between the aggregate and mortar is more important in high strength concrete which may get influenced easily by the improper mixing and experimental process. Distribution of coarse aggregates may affect the test results greatly [4,26]. Therefore, the direct tension test is not widely used.…”

Section: Direct Tension Testmentioning

confidence: 99%

“…Out of these tests, the results can be obtained directly by using the direct tension test. However, there is a high possibility of the formation of a secondary bending moment because of the improper fixation and eccentric loading of specimens in the testing assembly [4][5][6]. Hence, the applicability of this test is limited.…”

Section: Introductionmentioning

confidence: 99%

“…The authors found the difficulty for predicting the possible location of failure because of the intrinsic properties of the concrete microstructure. By using the concept of biaxial stress state same as that of in a strut-and-tie model, unique shape of the specimen for evaluating the tensile strength of concrete was developed [4]. This method overestimates and underestimates the results, respectively, with the Brazilian test and the flexural test, and different fracture mechanisms were observed in the specimens.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Innovative Test Method for Tensile Strength of Concrete by Applying the Strut-and-Tie Methodology

et al. 2020

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Tensile strength is one of the important mechanical properties of concrete, but it is difficult to measure accurately due to the brittle nature of concrete in tension. The three widely used test methods for measuring the tensile strength of concrete each have their shortcomings: the direct tension test equipment is not easy to set up, particularly for alignment, and there are no standard test specifications; the tensile strengths obtained from the test method of splitting tensile strength (American Society for Testing and Materials, ASTM C496) and that of flexural strength of concrete (ASTM C78) are significantly different from the actual tensile strength owing to mechanisms of methodologies and test setup. The objective of this research is to develop a new concrete tensile strength test method that is easy to conduct and the result is close to the direct tension strength. By applying the strut-and-tie concept and modifying the experimental design of the ASTM C78, a new concrete tensile strength test method is proposed. The test results show that the concrete tensile strength obtained by this proposed method is close to the value obtained from the direct tension test for concrete with compressive strengths from 25 to 55 MPa. It shows that this innovative test method, which is precise and easy to conduct, can be an effective alternative for tensile strength of concrete.

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