The challenge with recycling is to combine strict environmental controls with cost-efficient methods to make recycling an economically viable proposition.
Materials such as asphalt, concrete, brick and natural stone from infrastructure and building demolition can be both an environmentally responsible resource and a cost-effective option to virgin rock material production.
Recycled aggregate can replace or supplement many of the materials currently used in construction around the world.
The right preparation is a cornerstone of successful recycling. This demands thorough understanding of the materials and processes in order to ensure a quality end product and avoid damage to equipment.
Currently, only 50% of aggregates are recycled. However, the European Union wants that figure to reach 70% by 2020. If this becomes legislation, an additional 80 million tonnes of material will need to be recycled each year.
Recycling techniques: Materials
Reclaimed asphalt can be resized and processed into recycled aggregate using crushing and screening methods. This material can then be reused in new asphalt production, bonded road base or non-bonded upper course material for roads.
Concrete can be processed using crushing and screening to produce cement bonded base course, aggregate materials for new concrete production or high-quality trench fillers/drainage course material.
Brick and natural stone can be reused as a base course material or bulk materials (hardcore) for drainage. It can also be converted into manufactured sharp sand for new brick production.
Recycling techniques: Preparation
You can increase crusher capacity by up to 50% through good preparation of the input material. The maximum size should be about 80% of the crusher inlet opening.
Metal pieces must first be extracted from material such as slag, using excavators with grabs and a strong electromagnet.
For slag recycling, a belt protection plate is needed under the crusher to ensure metal in the crushed slag does not damage the discharge belt. An over-band magnet on the discharge conveyor is used to discharge ferrous metals from the crusher material.
Recycling expertise: How we deliver
The recycling industry has experienced a huge degree of change over the past 15 years. Increasing mechanization has made sites safer, more efficient and more environmentally sound than ever before.
Sandvik products have helped pioneer this shift, enabling contractors to tackle a wider range of tasks with a line-up of increasingly specialized attachments.
High productivity in recycling
Sandvik mobile crushers and screens are designed to generate high volumes of desirable end products. They can be used to resize, shape and separate recycled materials into saleable products with maximum efficiency.
Our equipment is easy to transport, operate and maintain. It ensures a reliable and cost-effective solution for onsite processing of recycling materials, while ensuring the operation meets all relevant local health and safety requirements.
Dedicated to recycling
Sandvik has a continuous focus on creating products that are in line with the environmental and emissions legislation. We work closely with a number of environmental agencies and associations, including the European Quality Association of Recycling.
Contact us for advice on product selection or other technical support.