Scholarlink

<p>The increasing demand for sand and the generation of industrial by-products have created the need for sustainable alternatives in concrete production. This study investigates the use of steel slag as a partial replacement for manufactured sand (M-sand) and evaluates its effect on the mechanical durability and microstructural properties of concrete. Concrete mixes were prepared with 0% 10% 20% and 30% replacement of M-sand by steel slag and tested at curing ages of 7, 28, and 45 days. The results showed that concrete performance was influenced by the percentage of steel slag replacement. Among the mixes studied the 20% replacement level (S20) showed the most balanced performance achieving compressive strengths of 16.60&#xa0;MPa, 28.62&#xa0;MPa, and 29.59&#xa0;MPa at 7, 28, and 45 days respectively. Split tensile strength and rebound hammer results followed trends similar to compressive strength behaviour. Water absorption increased slightly with increasing slag content because of the angular shape and higher water demand of steel slag particles. Microstructural investigations using XRD, SEM–EDAX and XRF analyses confirmed continued hydration and the formation of additional calcium silicate hydrate (C–S–H) gel in slag-incorporated concrete. The S20 mix showed improved matrix development and denser hydration products than the control mix. Although the reduction in embodied CO₂ emissions was limited the use of steel slag contributed to industrial waste utilization and reduced dependence on processed fine aggregates. Further studies on long-term durability supplementary cementitious materials and field applications are recommended.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Eco-efficiency and performance optimization of concrete incorporating steel slag as partial replacement of manufactured sand

  • 期刊论文

  • 发表日期：

    2026年7月6日

查看全文
  • Rohan Kumar Choudhary,
  • Awdhesh Kumar Choudhary,
  • Keshav Kumar Sharma

摘要

The increasing demand for sand and the generation of industrial by-products have created the need for sustainable alternatives in concrete production. This study investigates the use of steel slag as a partial replacement for manufactured sand (M-sand) and evaluates its effect on the mechanical durability and microstructural properties of concrete. Concrete mixes were prepared with 0% 10% 20% and 30% replacement of M-sand by steel slag and tested at curing ages of 7, 28, and 45 days. The results showed that concrete performance was influenced by the percentage of steel slag replacement. Among the mixes studied the 20% replacement level (S20) showed the most balanced performance achieving compressive strengths of 16.60 MPa, 28.62 MPa, and 29.59 MPa at 7, 28, and 45 days respectively. Split tensile strength and rebound hammer results followed trends similar to compressive strength behaviour. Water absorption increased slightly with increasing slag content because of the angular shape and higher water demand of steel slag particles. Microstructural investigations using XRD, SEM–EDAX and XRF analyses confirmed continued hydration and the formation of additional calcium silicate hydrate (C–S–H) gel in slag-incorporated concrete. The S20 mix showed improved matrix development and denser hydration products than the control mix. Although the reduction in embodied CO₂ emissions was limited the use of steel slag contributed to industrial waste utilization and reduced dependence on processed fine aggregates. Further studies on long-term durability supplementary cementitious materials and field applications are recommended.

Graphical abstract