Length Effect at Testing Splitting Tensile Strength of Concrete

Słowik, Marta; Akram, Amanda

doi:10.3390/ma15010250

Cited by 6 publications

(3 citation statements)

References 19 publications

(19 reference statements)

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“…According to Tayeh et al (54), the bond strength was unusually high in this case. Due to the simplicity of this test, some researchers performed the STT on composite cubes (55), prisms (51), or cylinders (56) to evaluate the correlation between various tests. Michael and M. Sprinkel (57) described the tensile bond strength into five groups, shown in Table 2.…”

Section: Splitting Cylinder Testmentioning

confidence: 99%

Effect of various interface bond tests and their failure behavior on substrate and overlay concrete -A Review

Pulkit¹,

Saini²,

Chalak³

2023

Res. Eng. Struct. Mater.

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Concrete is a widely used building material in the construction sector. Still, the lifespan of concrete is limited because many factors can influence the performance of concrete structures, which can be classified based on physical, chemical, and mechanical changes that occur during their service life. In addition, the structure's lifespan is being reduced due to adverse environmental conditions and loads. These require maintenance, restoration, or reconstruction. Therefore, considerable concrete remediation is necessary, and the best option is to repair it. However, the cost associated with restoring the deteriorating concrete structures is higher. The repaired concrete strength mainly depends on the interface layer, situated between the substrate (old) and overlay (new) concrete. The interface layer strength primarily depends on interface adhesion, friction, aggregate interlock, bonding agent, compaction, cleanliness, moisture content, concrete age, roughness, and time-dependent variables. Multiple tests are available to analyse the bonding behavior between substrate-overlay concrete. However, no particular method is available to access the bond strength. This paper describes various methods and techniques used by researchers to evaluate bond strength. The reviewed summary has shown that concrete repair is the best solution, and higher-strength concrete uses show better shear results; also, conventional concrete is more economical than higher-strength concrete. Among all the available tests the bi-surface shear test and slant shear test are the more suitable method to determine the bond strength.

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Section: Splitting Cylinder Testmentioning

confidence: 99%

Effect of various interface bond tests and their failure behavior on substrate and overlay concrete -A Review

Pulkit¹,

Saini²,

Chalak³

2023

Res. Eng. Struct. Mater.

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“…Additionally, the enhancement of static and dynamic tensile and compressive strengths also differs. [15][16][17]. Under uniform external loading, changes in specimen height, effective cross-sectional area, and cross-section shape result in proportional fluctuations in measured strength.…”

Section: Introductionmentioning

confidence: 99%

Study on the Relationship between Strength and Failure Area of Concrete Specimens under Complex Loading Conditions

Liang,

Li,

2024

Preprint

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Based on the dynamic strength variation mechanism of concrete under complex loading conditions, two approaches were devised: numerical testing and CT scanning, guided by the principle of minimizing energy dissipation. A methodology for calculating concrete's failure area and measuring its strength was developed. The analysis delves into the mechanisms behind failure patterns and variations in concrete specimen strength, focusing on crack initiation, development, and the resultant failure surface formed by crack propagation, along with the stress distribution in concrete specimens subjected to diverse loading conditions. Through evaluating the strength and computed failure area of concrete specimens, it is evident that the loading method influences both the strength and failure area of concrete specimens. In general, a larger failure area correlates with a higher measured strength.

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“…The cube cleavage test offers convenience in both specimen fabrication and loading. Its formula for indirect tensile strength is adopted from the Brazilian disc splitting tensile strength solution [12,13]. This may lead to a discrepancy between the experimental results and the actual situation.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation on Indirect Tensile Strength of Concrete with Rectangular Cross-Section under Locally Distributed Load

Wang,

Xu,

Sun

et al. 2023

Materials

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The indirect tensile test plays a crucial role in experimental investigations of brittle material properties. In this study, a mechanical analysis model of the rectangular test block is established based on the theory of elastic mechanics for the characteristics of the indirect tensile test. The theoretical solution of the triangular series is derived for the rectangular test block under the locally distributed load. The finite element simulation results and splitting test results were compared with the theoretical results. The results of the study verify the accuracy of the theoretical solutions. Based on the proposed analytical solution, the effects of loading width and length-to-height ratio (h/l) of local loading on the measured tensile strength of test block are discussed. The results demonstrate that the tensile strength of the test block increases as the loading width expands, and the rate of growth in the recorded tensile strength gradually stabilizes. The variation in loading width affects the location of crack initiation points during the concrete test block splitting tests. When the loading width exceeds 6% of the side length of test block, the cracking point is positioned at the center of test block, ensuring the effectiveness of the splitting test. As the length-to-height ratio of the test block increases, there is a general upward trend in the measured tensile strength. When h/l < 0.6, the measured tensile strength initially increases before decreasing. However, when h/l > 0.6, the measured tensile strength consistently increases, with the rate of increase gradually diminishing until it stabilizes. The length-to-height ratio also significantly influences the location of the cracking point in the test block. As the length-to-height ratio increases, the cracking point initially shifts from around the center to the central point and then further from the center toward the edge. To ensure that the location of the crack initiation point is in the center of the specimen and that the tensile strength is close to the measured result, the length to height ratio can be chosen at around 0.85.

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Length Effect at Testing Splitting Tensile Strength of Concrete

Cited by 6 publications

References 19 publications

Effect of various interface bond tests and their failure behavior on substrate and overlay concrete -A Review

Effect of various interface bond tests and their failure behavior on substrate and overlay concrete -A Review

Study on the Relationship between Strength and Failure Area of Concrete Specimens under Complex Loading Conditions

Theoretical Investigation on Indirect Tensile Strength of Concrete with Rectangular Cross-Section under Locally Distributed Load

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