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<p>Waste tires are a growing environmental concern. One way to recycle them is by using rubber in construction, particularly in concrete. This study investigated the effect of incorporating rubber as a partial replacement for natural aggregates in pervious concrete at replacement levels ranging from 0% to 10%. The evaluated properties included mechanical strength, permeability, abrasion resistance, fire resistance, water absorption, and density. The results showed that compressive, flexural, and tensile strengths decreased with increasing rubber content due to the elastic nature and weak bonding of rubber particles with the cement matrix; however, the resulting strength levels remained acceptable for non-structural and lightly loaded applications. Abrasion resistance improved with rubber addition, particularly up to 6% replacement, beyond which the improvement became marginal. Permeability and fire resistance exhibited a trade-off, as rubber incorporation reduced water absorption and weight loss while increasing crude substance (C.S.) loss, suggesting some chemical instability. An optimal performance balance was observed at rubber replacement levels between 2% and 6%. Overall, rubber addition led to reduced water absorption and increased density, indicating a denser, less porous, and more durable concrete matrix. In conclusion, although rubber negatively affects mechanical strength, it enhances durability-related properties, making rubberized pervious concrete a sustainable solution for low-load applications and waste rubber recycling.</p>

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Comprehensive investigation on the effect of the crumb rubber as on the mechanical properties, permeability, abrasion, fire resistance, water absorption and density of pervious concrete; experimental investigation

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Bzhar Muheddin Mohammed,
  • Twana Othman M. Amin,
  • Rafah Rasheed Abdulmajeed,
  • Hersh F. Mahmood,
  • Soran Abdrahman Ahmad

摘要

Waste tires are a growing environmental concern. One way to recycle them is by using rubber in construction, particularly in concrete. This study investigated the effect of incorporating rubber as a partial replacement for natural aggregates in pervious concrete at replacement levels ranging from 0% to 10%. The evaluated properties included mechanical strength, permeability, abrasion resistance, fire resistance, water absorption, and density. The results showed that compressive, flexural, and tensile strengths decreased with increasing rubber content due to the elastic nature and weak bonding of rubber particles with the cement matrix; however, the resulting strength levels remained acceptable for non-structural and lightly loaded applications. Abrasion resistance improved with rubber addition, particularly up to 6% replacement, beyond which the improvement became marginal. Permeability and fire resistance exhibited a trade-off, as rubber incorporation reduced water absorption and weight loss while increasing crude substance (C.S.) loss, suggesting some chemical instability. An optimal performance balance was observed at rubber replacement levels between 2% and 6%. Overall, rubber addition led to reduced water absorption and increased density, indicating a denser, less porous, and more durable concrete matrix. In conclusion, although rubber negatively affects mechanical strength, it enhances durability-related properties, making rubberized pervious concrete a sustainable solution for low-load applications and waste rubber recycling.