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Related Concept Videos

Non-destructive Tests for Concrete Strength01:12

Non-destructive Tests for Concrete Strength

655
The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
655
Impact Strength of Concrete01:21

Impact Strength of Concrete

649
Impact strength in concrete is a critical measure that reflects the material's capability to endure the forces applied during pile driving and when supporting machinery foundations that experience impulsive loads. It is also essential when handling precast concrete components to prevent accidental damage. The impact strength is assessed by observing the concrete's resistance to repeated impacts and energy absorption capacity. A key indicator of significant damage to concrete is when it...
649
Tensile Strength Considerations of Concrete01:16

Tensile Strength Considerations of Concrete

627
Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
The dimensions and shape of a concrete specimen...
627
Relation Between Tensile Strength and Compressive Strength of Concrete01:30

Relation Between Tensile Strength and Compressive Strength of Concrete

739
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the...
739
Abrasion Resistance of Concrete01:23

Abrasion Resistance of Concrete

609
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
609
Fatigue Strength of Concrete01:22

Fatigue Strength of Concrete

623
Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
623

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Improving Non-Destructive Concrete Strength Tests Using Support Vector Machines.

Yi-Fan Shih1, Yu-Ren Wang2, Kuo-Liang Lin3

  • 1Department of Civil Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan. shih090202@kimo.com.

Materials (Basel, Switzerland)
|August 11, 2017
PubMed
Summary
This summary is machine-generated.

Non-destructive testing (NDT) methods like rebound hammer and ultrasonic pulse velocity tests estimate concrete strength. Combining these methods and using Artificial Intelligence (AI) with support vector machines (SVMs) improves accuracy over traditional statistical models.

Keywords:
artificial intelligenceconcrete compressive strengthnon-destructive testrebound hammer testsupport vector machinesultrasonic pulse velocity test

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Area of Science:

  • Civil Engineering
  • Materials Science
  • Structural Health Monitoring

Background:

  • Non-destructive testing (NDT) is crucial for assessing in situ concrete properties without structural damage.
  • Rebound hammer and ultrasonic pulse velocity tests are common NDT methods for concrete evaluation.
  • Existing statistical methods for estimating concrete compressive strength from NDT data can be unreliable.

Purpose of the Study:

  • To develop and validate an Artificial Intelligence (AI) model for more accurate concrete compressive strength estimation.
  • To compare the performance of AI models against traditional statistical regression models.
  • To investigate the efficacy of combining multiple NDT methods for improved concrete property assessment.

Main Methods:

  • Utilized support vector machines (SVMs), a type of AI, for concrete compressive strength estimation.
  • Collected and analyzed data from 95 cylinder concrete samples.
  • Compared the predictive accuracy of single NDT methods, combined NDT methods (SonReb), and statistical regression models.

Main Results:

  • The combined NDT methods (SonReb) provided superior estimations compared to individual NDT methods.
  • The SVM model demonstrated higher accuracy in estimating concrete compressive strength than statistical regression models.
  • AI-driven analysis of NDT data offers a more reliable approach to assessing concrete properties.

Conclusions:

  • The SonReb method, integrating rebound hammer and ultrasonic pulse velocity tests, enhances the reliability of concrete strength estimation.
  • Support vector machines (SVMs) offer a more accurate and robust alternative to statistical methods for NDT data analysis in concrete.
  • AI-based NDT offers a promising avenue for accurate and non-damaging structural health monitoring of concrete.