Performance of sustainable rubberised RC columns fails by eccentric load

• Main Authors: Al-Hasnawey, Tabarak H. A., Al-Mutairee, Hayder M. K., Kadhim, Majid M. A.
• Format: Conference Proceeding
• Language: English
• Subjects: Axial stress; Compressive strength; Concrete columns; Concrete structures; Crack propagation; Eccentric loads; Failure load; Failure mechanisms; Reinforced concrete; Rubber; Substitutes
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0191251

The behavior of reinforced concrete columns using considerable recycling and reuse of crumb rubber as a substitute for aggregate particles is investigated in this work. The rubber percentages as a substitute fine aggregate are the most important characteristics. Fine aggregate was replaced with crumb rubbers in three various proportions by volume (5%, 10 %, and 15 %). The tests carried out over four square cross-section columns with varying rubber content and axial stresses. Rubberised reinforced concrete members are found to have a good balance than ordinary reinforced concrete structures. The examined columns have the same crack patterns in a typical failure mechanism, and crack propagation was similar on both sides of each sample. It has been noted that increasing crumb rubber volumetric replacements’ ratio from 0% to 15% reduced specimen’s ultimate deflection by 15.51%, and significantly decrease the ultimate capacity by 25.45%. The ratio of crumb rubber to fine aggregate substitution reduces the failure load of reinforced concrete columns. The use of crumb rubber has a significant impact on the distortion and compressive strength of rubberised concrete column samples, as shown by the load-axial displacement curve.