CA_Tallguy, it doesn’t generally need to be waterproof. It just needs to stay in place. If it’s a small area like that it’ll be easy. Cut some slots into the concrete with an angle grinder and it won’t fall out.
I spoke to pros about waterproofing first and they told me if I do that then I can forget about them warranting any work they do. Pebblecrete sticks well to concrete/cementiious shell. Less so to waterproofing membranes.
The admixes the professionals use aren’t for waterproofing typically, they’re to aid workability and adhesion.
Use your cement and pebbles (and some acrylic admix if you want) and patch away. Trowel it flush with the existing and then expose pebbles when it’s ready. Practice various mixes on some concrete. I practiced on cheap concrete pavers until I could do it and was happy with colour.
Please note that with the PVA you shouldn’t apply it as a layer on its own, you can only use as an admix with cement. PVA re emulsifies in water so if you’ve applied a pure layer of it you risk it delaminating.
You seem to have pebbles. Go buy a bag of cement and mix up a batch and have a go. Do that prior to trying out admixes.
I spoke to pros about waterproofing first and they told me if I do that then I can forget about them warranting any work they do. Pebblecrete sticks well to concrete/cementiious shell. Less so to waterproofing membranes.
The admixes the professionals use aren’t for waterproofing typically, they’re to aid workability and adhesion.
Use your cement and pebbles (and some acrylic admix if you want) and patch away. Trowel it flush with the existing and then expose pebbles when it’s ready. Practice various mixes on some concrete. I practiced on cheap concrete pavers until I could do it and was happy with colour.
Please note that with the PVA you shouldn’t apply it as a layer on its own, you can only use as an admix with cement. PVA re emulsifies in water so if you’ve applied a pure layer of it you risk it delaminating.
You seem to have pebbles. Go buy a bag of cement and mix up a batch and have a go. Do that prior to trying out admixes.