Question 1

What is exposed aggregate concrete?

Accepted Answer

Exposed aggregate concrete is a decorative finish where the top layer of cement paste is washed or brushed away while the concrete is green, revealing natural stones and pebbles embedded in the mix. The result is a textured, slip-resistant surface popular for driveways, paths, and pool surrounds in Adelaide.

Question 2

How long does exposed aggregate concrete last in Adelaide?

Accepted Answer

Exposed aggregate concrete typically lasts 25–40 years with minimal maintenance. The aggregate stones are harder than the surrounding cement paste, making the surface highly wear-resistant. Sealing every 3–5 years with a penetrating sealer maintains colour and protects against Adelaide's UV exposure, heat, and oil staining.

Question 3

How do I maintain an exposed aggregate driveway?

Accepted Answer

Rinse regularly to remove leaf matter and dirt. Reseal with a penetrating sealer every 3–5 years to prevent staining and UV fade. Avoid high-pressure washing directly on the aggregate, as it can loosen the stone bond over time. Treat oil stains immediately with a degreaser and stiff-bristled brush.

Question 4

Can exposed aggregate be applied over existing concrete?

Accepted Answer

No. Exposed aggregate requires stones to be embedded in the full concrete pour — it cannot be applied as a thin overlay. Existing concrete must be removed before installation. Thin decorative micro-toppings exist but do not match the durability or appearance of genuine exposed aggregate concrete.

Question 5

What colours and stone types are available for exposed aggregate in Adelaide?

Accepted Answer

Kenset Construction offers a range of aggregate blends including natural river pebbles, crushed granite, basalt, and quartz in colours from cream and honey to charcoal and terracotta. The cement matrix can also be tinted with oxide pigments to complement your home's colour palette. We carry sample boards for selection.