How to use crushed recycled glass in construction

From Howtopedia - english

1) Some building inspectors will allow you to use crushed glass in place of gravel underneath slab-on-grade concrete. It works similar to gravel and in some cases it may be free from the local recycling center.

2) Some building inspectors will allow you to use crushed glass in place of gravel for septic drain fields. It works similar to gravel in this application and in some cases may be available free from the local recycling center.