News from CED Students Around the Globe
A 7-member team of third year civil engineering students from ACI NEDUET Student Chapter represented NED University of Engineering & Technology at the ACI (American Concrete Institute) Spring Virtual Concrete Solutions Competition 2021 and won 1st prize in the Most Innovative Design/Developmental Use of Concrete Category.
The ACI Spring Concrete Solutions Competition 2021 was open to ACI Student Chapters from across the globe. Teams were required to submit a YouTube video to demonstrate/explain how their use of concrete could positively impact the world at large. The top 20 submittals were shortlisted for a live interview with judges during the ACI Virtual Concrete Convention on 28th March.
This was the first time that any team from NED University of Engineering and Technology or from Pakistan had participated in this global competition. The teams that were shortlisted included teams from USA, Philippines, Bangladesh, Lebanon, Jordan, Mexico, Ecuador, and Peru. Most of these teams had been participating in ACI’s event for years. Despite this, the solution given by NED’s young innovators made its way to the top in the category of the Most Innovative Design/ Developmental use of concrete, amongst all these formidable opponents.
NEDUET’s team presented the use of Sugarcane Bagasse Ash (SCBA) as a partial replacement of cement in concrete, thereby significantly reducing the carbon footprint of the cement industry without compromising on the functionality and technical aspects of concrete.
In picture (from left to right): Mudassir Rehman, Muneeb Ahmad, Ammar Siddiqi, Talha Bhutto, Faculty Advisor: Dr Shamsoon Fareed, Alyina Hashmi, Faiza Hassan, Sadia Ajmal.
The concrete is widely used construction material having one of its main constituents of cement which contributes around 8% of the global Carbon dioxide emission. In order to achieve cement production with sustainability, Team NEDIA proposed use of sugarcane bagasse as a partial replacement in the cement for preparing concrete. For this purpose, the use of the blend of Portland cement and finely grounded sugarcane bagasse ash (20% by weight of cement) in the preparation of the concrete was proposed. The use of such practice not only reduced the carbon footprint of cement, but it also integrated the deportation of SCBA from landfills. Furthermore, based on the already published articles, it was observed that this blend of cement has 76% more silicate and 6% more aluminum oxide content than the ordinary Portland cement (OPC). It exhibited higher electrical resistivity, lower expansion and have lower specific gravity than OPC. It also has substantially lower heat of hydration, lower chloride ion permeability and water penetration. Moreover, concrete prepared from such blend of cement exhibited 3.4% increase in the split tensile strength after 28 days curing and 9.4% increase in the compressive strength after 56 days curing. Therefore, it can be concluded that its a win-win case for both, concrete’s functionality and global warming.
Alyina Rizwan Hashmi
Muhammad Talha Bhutto
Sadia Ajmal Khan
Muhammad Muneeb Ahmad
Muddasir Rehman Khuhro
Faculty Advisor: Dr Shamsoon Fareed, Assistant Professor, Dept. of Civil Engineering