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<p>The increasing demand for sustainable construction materials has encouraged the utilization of alternative aggregates to reduce the environmental impacts associated with conventional natural resources. This study investigates the feasibility of using South Indian flint stone, a naturally occurring waste/by-product, as a partial replacement for conventional coarse aggregate in cement concrete. The flint stone was crushed and graded into required sizes, and its mineralogical, and physical properties were evaluated, confirming its suitability and durability for concrete applications. Concrete mixtures were prepared with varying replacement levels of natural aggregate using flint stone, and their fresh and hardened properties were experimentally evaluated. The results indicate that the optimum mix containing 60% flint stone aggregate (F60CC) achieved a 28-day compressive strength of 35.8 N/mm<sup>2</sup>, a splitting tensile strength of 3.94 N/mm<sup>2</sup>, and a flexural strength of 4.40 N/mm<sup>2</sup>, representing improvements of approximately 46%, 18%, and 29%, respectively, compared with the control concrete. In addition, the incorporation of flint stone improved aggregate interlocking and overall mechanical performance without compromising workability. The findings demonstrate that flint stone can effectively replace a significant proportion of conventional coarse aggregates while meeting structural strength requirements. Therefore, the use of flint stone aggregate offers a sustainable solution for concrete production by reducing dependence on natural aggregates, minimizing material waste, and promoting environmentally responsible construction practices in infrastructure and structural applications. </p>

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Performance evaluation of concrete with South Indian flint stone as coarse aggregate

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月5日

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  • Anegalla Thirupathi,
  • Dsvsmrk Chekravarty,
  • Seetunya J.,
  • T. Senthil Vadivel,
  • Maria Rajesh Antony,
  • M. Prem Anand,
  • Rajalekshmi P.,
  • Subash N.,
  • Lema Abate Adulo

摘要

The increasing demand for sustainable construction materials has encouraged the utilization of alternative aggregates to reduce the environmental impacts associated with conventional natural resources. This study investigates the feasibility of using South Indian flint stone, a naturally occurring waste/by-product, as a partial replacement for conventional coarse aggregate in cement concrete. The flint stone was crushed and graded into required sizes, and its mineralogical, and physical properties were evaluated, confirming its suitability and durability for concrete applications. Concrete mixtures were prepared with varying replacement levels of natural aggregate using flint stone, and their fresh and hardened properties were experimentally evaluated. The results indicate that the optimum mix containing 60% flint stone aggregate (F60CC) achieved a 28-day compressive strength of 35.8 N/mm2, a splitting tensile strength of 3.94 N/mm2, and a flexural strength of 4.40 N/mm2, representing improvements of approximately 46%, 18%, and 29%, respectively, compared with the control concrete. In addition, the incorporation of flint stone improved aggregate interlocking and overall mechanical performance without compromising workability. The findings demonstrate that flint stone can effectively replace a significant proportion of conventional coarse aggregates while meeting structural strength requirements. Therefore, the use of flint stone aggregate offers a sustainable solution for concrete production by reducing dependence on natural aggregates, minimizing material waste, and promoting environmentally responsible construction practices in infrastructure and structural applications.