Pavement
- Publication no: AP-G97-22
- ISBN: 978-1-922700-29-2
- Published: 25 January 2022
- PDF (free) Download
The purpose of this guideline is to provide potential recyclers with the information they need to gain a better understanding of how recycled crushed glass (RCG) should be processed to make it fit-for-purpose for infrastructure applications.
This guideline provides readers with a point of reference to review process considerations, technical notes and the current market practices for producing RCG products for use as a sand replacement in road construction such as bedding sand, drainage, landscaping, backfill and concrete applications.
The guideline includes information on the most common pieces of equipment used in crushing, processing, and cleaning. It also provides process examples in practice. Case studies of current recycled crushed glass plants and their operations are also presented.
It is recognised that RCG is not a new product or technology. However, the applications and variability of glass have substantially increased in complexity.
Watch a detailed webinar with report authors Dr James Grenfell and Dr Didier Bodin.
- 1. Introduction
- 1.1 Background
- 1.2 Purpose
- 2. Processes Used to Convert Waste Glass to RCG
- 3. Structure of the Guideline
- 4. RCG Product Applications
- 4.1 Introduction
- 4.2 Bedding Sand Replacement
- 4.3 Drainage, Embankment Fill and Landscaping
- 4.4 Concrete
- 5. Managing RCG Quality
- 5.1 Stockpile Management
- 5.2 Testing for Conformity
- References
- Appendix A Crushing
- A.1 General
- A.2 Morphology of Crushing
- A.3 Primary Crushing – Particle Size Reduction (Passing 100 mm Sieve)
- A.3.1 Jaw Crusher
- A.4 Secondary Crushing Equipment – Particle Size Reduction – Sand (Passing 10 mm Sieve)
- A.4.1 Hammer Crusher
- A.4.2 Typical Secondary Crusher Range
- A.5 Tertiary Crushing Equipment (Particle Size Reduction – Powdered) (Passing 0.075 mm Sieve)
- A.5.1 Cone Crusher
- A.5.2 Ball Mill Crusher
- A.5.3 Vertical (VSI) and Horizontal (HSI) Shaft Impactors
- Appendix B Processing
- B.1 Optical Sorter
- B.2 Magnetic Belt Sorter
- B.3 Air Classifier
- B.4 Eddy Current Separator
- Appendix C Cleaning
- C.1 Washing and Separating Equipment
- C.1.1 Fine Material Screw Washer
- C.1.2 High-rate Thickeners
- C.1.3 High-rate and High-density Thickeners
- C.1.4 Paste Thickeners
- C.1.5 Dewatering Screens (Drying/Drier)
- Appendix D Mobile Plants
- Appendix E Case Studies
- E.1 State and Federal Specifications, and Commercial Trials for the use of RCG
- E.2 Example #1 RCG Plant
- E.3 Example #2 RCG Plant