Scholarlink

<p>The disposal of waste rubber on land significantly contributes to environmental pollution and the degradation of ecosystems. Globally, various forms of rubber waste such as tire rubber, natural rubber, synthetic rubber, rubber sludge, post-consumer rubber products, and rubber dust have become a growing concern. This study addresses the issue by utilizing industrial rubber waste, specifically conveyor belt rubber obtained from coal power plants, as a sustainable partial replacement for coarse aggregate in concrete. While the inclusion of rubber enhances sustainability, it often leads to reduced mechanical strength due to weak bonding between the smooth rubber surface and the cement matrix. To overcome this drawback, a sand-coating treatment was applied to the rubber shreds to increase surface roughness and improve interfacial adhesion. Additionally, steel fibres were incorporated to further enhance mechanical performance. Concrete mixes were prepared with rubber shreds at replacement levels of 2.5%, 5%, 7.5%, and 10% by volume, while steel fibres were added at a constant dosage of 1%. Concrete specimens such as cubes (150 × 150 × 150&#xa0;mm), prisms (100 × 100 × 500&#xa0;mm), and cylinders (150 × 300&#xa0;mm) were cast and tested. Three specimen groups were studied: the first group used plain rubber shreds, the second incorporated sand-coated rubber shreds, and the third combined sand-coated rubber shreds with steel fibres. The results showed that concrete containing sand-coated rubber shreds, particularly those combined with steel fibres, demonstrated significant improvements in compressive strength, flexural strength, modulus of elasticity, bond strength, pull-out strength, and impact resistance compared to concrete with untreated rubber and sand coated rubber shreds. Scanning Electron Microscopy (SEM) analysis was conducted for plain and sand coated rubber shreds to examine the surface characteristic and interfacial bonding potential in concrete. Additionally, regression models were developed to predict these mechanical properties using input parameters such as rubber volume fraction, cement content, fine and coarse aggregate proportions, and water–cement ratio. The models exhibited a high degree of correlation with the experimental data, validating their reliability.</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

Comparative Analysis of Rubberized Concrete Incorporating Plain and Sand-Coated Rubber Shreds with and Without Steel Fibre

  • 期刊论文

  • 发表日期：

    2026年4月10日

查看全文
  • R. Karthikeyan,
  • P. Partheeban,
  • K. Suguna,
  • M. Sivakumar

摘要

The disposal of waste rubber on land significantly contributes to environmental pollution and the degradation of ecosystems. Globally, various forms of rubber waste such as tire rubber, natural rubber, synthetic rubber, rubber sludge, post-consumer rubber products, and rubber dust have become a growing concern. This study addresses the issue by utilizing industrial rubber waste, specifically conveyor belt rubber obtained from coal power plants, as a sustainable partial replacement for coarse aggregate in concrete. While the inclusion of rubber enhances sustainability, it often leads to reduced mechanical strength due to weak bonding between the smooth rubber surface and the cement matrix. To overcome this drawback, a sand-coating treatment was applied to the rubber shreds to increase surface roughness and improve interfacial adhesion. Additionally, steel fibres were incorporated to further enhance mechanical performance. Concrete mixes were prepared with rubber shreds at replacement levels of 2.5%, 5%, 7.5%, and 10% by volume, while steel fibres were added at a constant dosage of 1%. Concrete specimens such as cubes (150 × 150 × 150 mm), prisms (100 × 100 × 500 mm), and cylinders (150 × 300 mm) were cast and tested. Three specimen groups were studied: the first group used plain rubber shreds, the second incorporated sand-coated rubber shreds, and the third combined sand-coated rubber shreds with steel fibres. The results showed that concrete containing sand-coated rubber shreds, particularly those combined with steel fibres, demonstrated significant improvements in compressive strength, flexural strength, modulus of elasticity, bond strength, pull-out strength, and impact resistance compared to concrete with untreated rubber and sand coated rubber shreds. Scanning Electron Microscopy (SEM) analysis was conducted for plain and sand coated rubber shreds to examine the surface characteristic and interfacial bonding potential in concrete. Additionally, regression models were developed to predict these mechanical properties using input parameters such as rubber volume fraction, cement content, fine and coarse aggregate proportions, and water–cement ratio. The models exhibited a high degree of correlation with the experimental data, validating their reliability.