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Improving rubber concrete by waste organic sulfur compounds
Liang-Hisng Chou1, Chun-Nan Lin, Chun-Ku Lu
1Department of Civil and Water Resource Engineering, National Chiayi University, Chiayi City, Taiwan.
Summary
Treating crumb rubber with organic sulfur compounds enhances concrete properties. This modification improves rubber-cement interactions, leading to significant increases in concrete strength.
Area of Science:
- Materials Science
- Civil Engineering
- Chemical Engineering
Background:
- Crumb rubber in concrete often leads to degradation.
- Improving the bond between rubber particles and cement hydration products (C-S-H) is key to enhancing mechanical strength.
- Surface modification of rubber particles is a potential strategy to improve compatibility.
Purpose of the Study:
- To investigate the effect of treating crumb rubber with waste organic sulfur compounds on its surface properties.
- To evaluate the impact of this surface modification on the interaction between rubber particles and cement hydration products (C-S-H).
- To assess the mechanical performance of concrete incorporating the modified crumb rubber.
Main Methods:
- Crumb rubber was treated with waste organic sulfur compounds.
- Colloid probe atomic force microscopy was used to measure intermolecular interaction forces between C-S-H and treated rubber particles.
- Compressive, tensile, and flexural strengths of concrete samples were tested.
Main Results:
- Treated crumb rubber exhibited enhanced hydrophilicity.
- Adsorption of organic sulfur compounds increased intermolecular interaction forces between rubber and C-S-H.
- Concrete samples with treated crumb rubber showed significant improvements in compressive, tensile, and flexural strengths.
Conclusions:
- Waste organic sulfur compounds effectively modify crumb rubber surfaces, increasing hydrophilicity and rubber-C-S-H interaction.
- Surface-treated crumb rubber can be a viable additive for improving the mechanical properties of concrete.
- This approach offers a promising method for utilizing waste materials in construction while enhancing concrete performance.
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