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<p>The increasing demand for sustainable construction materials has driven research into alternatives materials that are locally available and reduce cement consumption. This study evaluates whether granite, a locally available natural stone employed as a coarse aggregate, can effectively replace conventional river gravel, and how metakaolin (MK), a supplementary cementitious material (SCM) replacing 20&#xa0;wt.% of cement, influences its mechanical and durability properties. The research includes the physical characterization of granite (density, absorption, bulk density, and gradation) and petrographic analysis to identify its mineralogical composition and alterations. Additionally, the study evaluates compressive strength, porosity, and absorption, in addition to alkali silica reaction (ASR) through mortar bar expansion tests. Results indicate that granite increased concrete density and enhanced 7-day compressive strength. Furthermore, the combination of granite and MK significantly reduced density, porosity, absorption, and ASR expansion, improving durability and demonstrating their potential as viable and sustainable alternatives for enhancing concrete performance.</p> Graphical abstract <p></p>

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Mechanical and durability properties of sustainable concrete with granite and metakaolin

  • 期刊论文

  • 发表日期：

    2025年4月10日

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  • Christian Karin Valenzuela-Leyva,
  • Luis Antonio Ayon-Quintero,
  • Mario Guadalupe Gonzalez-Perez,
  • Miguel Armando Avila-Rubio,
  • Sergio Arturo Renteria-Guevara,
  • Magnolia Soto-Felix

摘要

The increasing demand for sustainable construction materials has driven research into alternatives materials that are locally available and reduce cement consumption. This study evaluates whether granite, a locally available natural stone employed as a coarse aggregate, can effectively replace conventional river gravel, and how metakaolin (MK), a supplementary cementitious material (SCM) replacing 20 wt.% of cement, influences its mechanical and durability properties. The research includes the physical characterization of granite (density, absorption, bulk density, and gradation) and petrographic analysis to identify its mineralogical composition and alterations. Additionally, the study evaluates compressive strength, porosity, and absorption, in addition to alkali silica reaction (ASR) through mortar bar expansion tests. Results indicate that granite increased concrete density and enhanced 7-day compressive strength. Furthermore, the combination of granite and MK significantly reduced density, porosity, absorption, and ASR expansion, improving durability and demonstrating their potential as viable and sustainable alternatives for enhancing concrete performance.

Graphical abstract