Rubberized Concrete Performance as Printed Concrete
摘要
Global production of scrap tyres exceeds 1.5 billion annually, creating significant environmental challenges due to limited disposal options and the ecological impact of accumulated waste. One of the outputs of recycling the scrap is crumb rubber (CR), which in this research is utilized in concrete as fine aggregates re-placer at 5, 10 and 15 per cent by weight of fine aggregates. The mixes are de-signed as an eco-friendly solution for printed concrete and tested in terms of their fresh and hardened properties. The printed concrete fresh properties are deter-mined by the flowability, buildability and extrudability, while its workability is by the slump flow test. The hardened properties are measured by the compression, flexural, splitting tensile and bond shear tests at 28 days of age. The results revealed the rubberized printed concrete exhibited satisfactory flowability, smooth extrusion, and adequate buildability for all mixes. The mechanical performances are affected by the axes of loaded, percentages of CR and interlayer bond strength of the composites. Hence these factors must be controlled to ensure the required strength for its applications is achieved.