Line Marking Hume ACT

A concrete recycling facility in Hume had us mark their operations building floor. We quoted from photos and a basic description. When we arrived, the floor was poured with recycled aggregate concrete — crushed concrete used as the aggregate in a new slab pour. The surface profile was highly variable: dense zones where the aggregate was tight, porous zones where gaps between aggregate particles were visible, and surface areas where the recycled aggregate had a different absorption rate to fresh concrete.

We applied our standard film-forming primer and marked. Adhesion varied dramatically between zones — tight in the dense areas, weak in the porous ones. About 25% of the floor needed rework with penetrating primer, which impregnates the variable surface rather than relying on a uniform film bond.

The fix was straightforward. The lesson was: we should have assessed the slab type during the quote, not on arrival. Recycled aggregate concrete is common in Hume's construction and demolition recycling sector. It looks like standard concrete from photos. It behaves very differently under a coating. A physical visit to assess the floor before quoting is now standard for any Hume industrial facility with unknown slab specification.

Hume is Canberra's heavy industrial fringe — the ACT's waste management, demolition, concrete and construction recycling sector clusters here, along with heavy logistics and industrial businesses. TCCS approved. Cold climate protocols apply May through September, as with all ACT sites.