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<p>This study investigates the structural, thermal, and mechanical enhancement of sulfur-based concrete through modification with a silico-polymer binder (silico-PB). Elemental sulfur, a byproduct of oil and gas refining, was combined with a silico-PB additive comprising silica nanoparticles and a polymeric binder. Raman spectroscopy confirmed the formation of extended polysulfidic (–S–S–) and Si–O–S bonds, while XRD revealed partial amorphization of sulfur, supporting the high elasticity and reduced brittleness. TGA analysis indicated a major decomposition onset at 365&#xa0;°C, nearly 100&#xa0;°C higher than that of pure sulfur, confirming enhanced thermal stability. SEM-EDS results showed a compact, homogeneous microstructure with well-dispersed silica and polymeric phases. The modified sulfur-based concrete exhibited compressive strength of 64.3 ± 2.8&#xa0;MPa after 288&#xa0;h, compared to 41.2 ± 3.4&#xa0;MPa for Portland cement at 672&#xa0;h, demonstrating accelerated hardening. Chemical resistance reached 90–95% in acidic and 86–93% in basic media, while freeze–thaw durability exceeded 2100 cycles, tenfold higher than standard Portland cement concrete. The low water absorption (above W20) and high wear resistance (0.2–0.3&#xa0;g/cm<sup>2</sup> loss) highlight the material’s suitability for industrial and marine applications. The silico-PB modification offers a scalable, low-energy (130–170&#xa0;°C) process with an estimated 60–80% CO<sub>2</sub> reduction relative to Portland cement production, enabling the valorization of industrial sulfur waste into sustainable, high-performance construction materials.</p>

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Improving Sulfur Concrete Performance Through Silico-Polymer Modification: Structural, Thermal, and Mechanical Insights

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Khayit Turaev,
  • Dilnoza Shavkatova,
  • Rustam Alikulov,
  • Lutfullo Bozorov,
  • Dilmurod Nabiev,
  • Ravshan Yodgorov,
  • Adeyinka Sikiru Yusuff,
  • Natarajan Elangovan,
  • Ashish Kumar,
  • Abhinay Thakur,
  • Elyor Berdimurodov,
  • Khasan Berdimuradov

摘要

This study investigates the structural, thermal, and mechanical enhancement of sulfur-based concrete through modification with a silico-polymer binder (silico-PB). Elemental sulfur, a byproduct of oil and gas refining, was combined with a silico-PB additive comprising silica nanoparticles and a polymeric binder. Raman spectroscopy confirmed the formation of extended polysulfidic (–S–S–) and Si–O–S bonds, while XRD revealed partial amorphization of sulfur, supporting the high elasticity and reduced brittleness. TGA analysis indicated a major decomposition onset at 365 °C, nearly 100 °C higher than that of pure sulfur, confirming enhanced thermal stability. SEM-EDS results showed a compact, homogeneous microstructure with well-dispersed silica and polymeric phases. The modified sulfur-based concrete exhibited compressive strength of 64.3 ± 2.8 MPa after 288 h, compared to 41.2 ± 3.4 MPa for Portland cement at 672 h, demonstrating accelerated hardening. Chemical resistance reached 90–95% in acidic and 86–93% in basic media, while freeze–thaw durability exceeded 2100 cycles, tenfold higher than standard Portland cement concrete. The low water absorption (above W20) and high wear resistance (0.2–0.3 g/cm2 loss) highlight the material’s suitability for industrial and marine applications. The silico-PB modification offers a scalable, low-energy (130–170 °C) process with an estimated 60–80% CO2 reduction relative to Portland cement production, enabling the valorization of industrial sulfur waste into sustainable, high-performance construction materials.