Fix Your Future Climate Action SDG 13 Hello WE ARE TEAM BOBA And today we will be talking about how waste management will play a big role in making Auckland a circular economy Our focus is the construction industry ID: 772568
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Fix Your Future: Climate Action SDG 13
Hello! ‹#› WE ARE TEAM BOBA And today, we will be talking about how waste management will play a big role in making Auckland a circular economy. Our focus is the construction industry.
Why is the construction industry relevant to climate action? What can be improved? Let’s get back to basics.
Cement is created from mixing superheated limestone and clay. To reach the heat of 700 ° C, combustion reactions created by fossil fuels are used. This creates a lot of CO2 emissions in itself. Additionally, the chemical reaction of the two materials fusing also produces CO2 as a byproduct. Creation of CementAnaerobic digestion (AD) of organic waste to create biogas which can be used to trigger the combustion reaction. Companies like Eco Stock & Scion have already invested in AD plants.Fossil fuels are still cheap compared to biogas. Therefore, in the future, Auckland Council may assist in making biogas a marketable commodity via subsidy.‹#›
RECYCLING CONCRETE Problem Number 2 with the Construction Industry ‹#›
Construction and demolition waste also represents Auckland’s largest single waste stream, at around 40% of total weight going to landfill. - Auckland Council ‹#›
Structural integrity is tightly regulated and many private building projects that use recycled concrete requires consent. There is also low market demand for recycled concrete due to the availability of virgin concrete. You can grind demolished concrete into aggregates and add it as an ingredient to “virgin concrete”. This will affect the quality and strength of concrete but not unreasonably. ‹#›Concrete is 100% recyclable.
Concrete recycling is done by sorting out uncontaminated rubble by size. This is difficult to do on-site where most recycling is done. Therefore, off-site concrete recycling sector in coordination with on-site recycling must grow. ANOTHER CHALLENGE: Transportation‹#›
How do we inspire the use of recycled concrete? Non-load bearing purposes RECREATIONAL With urban development comes residents wanting recreational benefits. E.g. Ruakura Inland Port. We can introduce Skate Parks, Basketball & Tennis Courts.PRIVATEMany New Zealanders live on farms or own baches. To get better access to these areas, they can use recycled concrete in replacement of gravel. Carports, driveways, pathways.‹#›
Becoming circular with Crushed Glass A study done by the Ellen MacArthur foundation observed that glass is a superior aggregate ingredient in concrete compared to other recycled materials. The major expense of recycling glass is the sorting of it. ‹#›
To summarise: Fossil Fuel Reduction Biogas use will lead cement creation to becoming a carbon neutral process. Recycled Glass Additive Will introduce more uses for recycled glass.‹#›Non-load bearing usagesWill inspire the usage of recycled concrete to the public.Circular economyRecycled concrete will attract jobs and economic growth in this sector, also drastically reducing concrete waste. On-site and off-site recyclingWill reduce cost of recycling and economic feasibility of marketing recycling concrete.
Thanks for listening! ‹#›