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Product Stewardship is the concept of manufacturers taking responsibility for their products through to end of life.
By doing this, it’s hoped manufactures will design products that maximise resource efficiency and reduce long-term waste.
Designing out waste is not necessarily an approach that works for all sectors. Ready-mix concrete is ubiquitous in the built environment. It’s also highly perishable.
In this case, the most practical approach is to capture this excess stream of high quality certified ready mix concrete and upcycle it into equally high-quality precast concrete products.
These upcycled products are designed in such a way that they can be easily used over and over again. This is the Envirocon Product Stewardship approach.
We’re New Zealand’s first and only construction-related product stewardship scheme accredited by the Minister for the Environment under the Waste Minimisation Act 2008.
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Concrete is made up of very carbon-intensive materials. The cement used in concrete is kiln dried, the kilns are often coal-fired. It is estimated that cement production alone contributes 10% of global emissions.
Concrete is essential to the infrastructure that supports modern civilization. As a result, an enormous amount of research has gone into how to make concrete more sustainable.
Within the NZ context, the primary approach to increasing the sustainability of concrete has been to substitute recycled materials in concrete production.
Using a small amount of crushed recycled concrete (<20%) and using fly ash to substitute cement are two of the most common approaches to concrete sustainability. Both these approaches are contained in the Environmental Choice NZ standard for green concrete.
Product stewardship offers a different approach – we argue the only truly sustainable approach.
We recognize that there is no easy fix to concrete sustainability, it is both essential and unsustainable. Our approach in this case is to eliminate waste, so we are maximizing resource use. We then use a design-led approach to creating products that can be reused over and over again. Product stewardship allows the embedded carbon footprint to be stretched over a longer life and more structures.
In 2008 the New Zealand Parliament passed the Waste Minimisation Act. This marked a change in approach to the regulation of waste and achieved broad political support.
The Act introduced the idea of Product Stewardship into the New Zealand regulatory framework. It allowed for both voluntary and mandatory schemes. Mandatory schemes are created through the designation of priority products by the Minister for the Environment. If a waste stream is designated a priority product all manufacturers, importers, and retailers of the designated product are responsible for the end of life management .
Priority products are chosen based on the detrimental environmental effect of the product at the end of life, the volume of the waste stream, and the effectiveness of a product stewardship scheme in managing the waste stream. In short, the ready mix concrete industry meets all criteria.
The Envirocon Product Stewardship Scheme is an industry-based voluntary scheme. Our members have recognised that regulation in this area is a matter of when, not if. By being voluntary the Envirocon Scheme is able to offer an affordable, sustainable, regulatory proof solution.
