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Bonding and Strength of Aggregate01:12

Bonding and Strength of Aggregate

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The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
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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...
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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.
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Toughness and hardness are critical properties of aggregate materials used in concrete, particularly on pavement surfaces and industrial flooring subjected to heavy loads. Toughness is defined as the aggregate's resistance to failure by impact and is measured by the aggregate impact value (AIV). For this, the aggregate impact value test is performed, wherein the impact is delivered by a standard hammer, which falls freely under its own weight onto the aggregates. The aggregates fragment in...
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The right type and quality of aggregates are crucial for concrete as they significantly influence its properties, mix proportions, and cost-effectiveness. If different sources are available for sand, the commonly used fine aggregate in concrete, the selection of sand is primarily based on its gradation.
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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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Related Experiment Video

Updated: Jun 16, 2025

Production and Analysis of Sporosarcina pasteurii Biocement Bricks Using Custom 3D-Printed Molds for Unconfined Compression Tests
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Unlocking the Potential of Caribbean Coarse Aggregates for High-Strength Concrete Development.

Adriana Mattos-Rodríguez1, Andrés Guzmán2, Daniel Abudinen1

  • 1Department of Civil and Environmental Engineering, Universidad de la Costa, Barranquilla 080002, Colombia.

Materials (Basel, Switzerland)
|June 13, 2025
PubMed
Summary

This study shows that local materials in the Colombian Caribbean can produce high-strength concrete (HSC). Marble granite aggregate yielded the best results, achieving 84 MPa compressive strength.

Keywords:
Caribbean regionPoisson’s ratiocoarse aggregatescompressive strengthhigh-strength concretemodulus of elasticity

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Area of Science:

  • Materials Science
  • Civil Engineering
  • Construction Materials

Background:

  • High-strength concrete (HSC) is crucial for modern construction, enabling robust structures and reduced element sizes.
  • Developing HSC using regionally available materials is key for sustainable and cost-effective construction.

Purpose of the Study:

  • To design and evaluate high-strength concrete (HSC) mixes utilizing materials from the Colombian Caribbean region.
  • To determine the suitability of local aggregates and cement for producing HSC with desirable mechanical properties.

Main Methods:

  • Prepared HSC mixes with water-cement ratios from 0.21 to 0.28.
  • Incorporated superplasticizer to ensure adequate workability.
  • Assessed compressive strength at 14, 21, and 28 days.

Main Results:

  • Local materials are suitable for producing HSC with compressive strengths between 55 and 84 MPa.
  • Marble granite aggregate achieved the highest strength (84 MPa) at a 0.23 water-cement ratio.
  • The optimal mix demonstrated a modulus of elasticity of 36,000 MPa and Poisson's ratio of 0.26.

Conclusions:

  • The Colombian Caribbean's construction materials can be effectively used to produce high-strength concrete.
  • The study provides a foundation for the application of locally sourced HSC in regional construction projects.