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Related Concept Videos

Relation Between Tensile Strength and Compressive Strength of Concrete01:30

Relation Between Tensile Strength and Compressive Strength of Concrete

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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...
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Tensile Strength Considerations of Concrete01:16

Tensile Strength Considerations of Concrete

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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...
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Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

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Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
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Fatigue Strength of Concrete01:22

Fatigue Strength of Concrete

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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...
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Strength of Cement01:20

Strength of Cement

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Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
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Non-destructive Tests for Concrete Strength01:12

Non-destructive Tests for Concrete Strength

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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...
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Predicting Compressive and Splitting Tensile Strengths of Silica Fume Concrete Using M5P Model Tree Algorithm.

Hammad Ahmed Shah1,2, Moncef L Nehdi3, Muhammad Imtiaz Khan4

  • 1Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA.

Materials (Basel, Switzerland)
|August 12, 2022
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Summary

This study developed accurate M5P models to predict the compressive strength (CS) and splitting tensile strength (STS) of silica fume (SF) concrete. These models offer a faster, cost-effective alternative to laboratory testing for concrete design.

Keywords:
M5P tree algorithmartificial intelligencecompressive strengthconcretemodelsilica fumesplitting tensile strength

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Area of Science:

  • Civil Engineering
  • Materials Science
  • Computational Engineering

Background:

  • Compressive strength (CS) and splitting tensile strength (STS) are critical for reinforced concrete design.
  • Silica fume (SF) enhances concrete properties and offers environmental advantages.
  • Accurate prediction models reduce the need for extensive laboratory trials.

Purpose of the Study:

  • To develop predictive models for CS and STS of SF concrete using the M5P algorithm.
  • To compare M5P model performance against linear regression and gene expression programming.
  • To analyze the influence of SF content, water-to-binder ratio, and age on concrete strength.

Main Methods:

  • Compiled large datasets (796 for CS, 156 for STS) from published literature.
  • Utilized the M5P model tree algorithm for prediction model development.
  • Employed statistical metrics (R², RMSE, MAE) to evaluate model accuracy.

Main Results:

  • M5P models demonstrated robust predictive capabilities for both CS and STS.
  • Parametric analysis revealed key influencing factors on concrete strength.
  • The developed models provide a reliable tool for SF concrete proportioning.

Conclusions:

  • The M5P algorithm effectively predicts the CS and STS of SF concrete.
  • These models serve as a valuable, efficient tool for engineers in concrete mix design.
  • The study highlights the importance of SF content, water-to-binder ratio, and age in determining concrete strength.