In a groundbreaking study published in ‘Tehnički Vjesnik’, Abdul Hafeez Buller from the Kulliyyah of Engineering at the International Islamic University Malaysia has shed light on the potential of recycled aggregates in green concrete. This research addresses a pressing concern in the construction industry: the over-exploitation of natural resources and the resulting environmental degradation.
As the construction sector grapples with rising costs and sustainability challenges, Buller’s findings present a dual opportunity: reducing expenses while promoting eco-friendly practices. The study reveals that replacing 50% of natural coarse aggregates with recycled aggregates derived from demolished concrete not only conserves resources but also offers a viable alternative without significantly compromising performance. “Our research indicates that while recycled aggregates exhibit higher water absorption and lower specific gravity, they still provide acceptable mechanical properties for construction applications,” Buller noted.
The implications of this research are significant. The unit weight of concrete made with recycled aggregates (RAC) is reported to be 11% lighter than that of traditional concrete, weighing in at 1957 Kg/m³. This reduction in weight could lead to lower transportation costs and enhanced structural efficiency in new builds. Moreover, the study highlights that tensile strength reductions, while evident in RAC cylinders, remain within theoretical limits, suggesting that the material can be effectively used in various structural applications.
As construction companies increasingly seek to balance cost with sustainability, Buller’s work could shape future developments in concrete production. The ability to utilize recycled materials aligns perfectly with the industry’s shift towards greener practices, potentially influencing standards and regulations in material sourcing. “By adopting recycled aggregates, we can not only lower our carbon footprint but also pave the way for a more sustainable future in construction,” Buller emphasized.
With the construction sector under pressure to innovate, the findings from this study could catalyze a broader acceptance of recycled materials, leading to significant changes in how concrete is produced and utilized. As the demand for sustainable building practices rises, this research serves as a timely reminder of the potential benefits of integrating recycled materials into mainstream construction.
For those interested in exploring this topic further, the full study is available in ‘Tehnički Vjesnik’ (Technical Gazette), a journal dedicated to advancing engineering knowledge. More information about the lead author’s work can be found on the Kulliyyah of Engineering’s website.
