It seems to me that slabs are rather expensive, so I am thinking of making some. I need the slabs to have a bar texture on top so that they are non slip when laid on a slope. Anyone any experience of making these, also a source of moulds please?
My god that sounds a bit of a faff.
Can't you get wholesale or reclaimed slabs to keep the cost down ?
Unless you're covering millions of m=B2, (in which case you'd need a whole load of moulds) i'd buy 'em.
Cheers
Paul.
I'm no expert (far from it) but I'd assume that you'd put the relief to create the texture in the bottom of the mould, then turn the slabs over once set.
Forget it. I made some caps and finials once, never again.
What I've done - not exactly for this. Obtain a large 2" sheet of polystyrene. For 50cm slab. Cut 3 80*80cm squares. Cut out 50cm square, with side relief. | \ / | (so it comes out easily). Stick this to the bottom slab with contact adhesive or something. To use. Spray with vegetable oil. Weigh out quantities of small aggregate, sand, cement, water, and mix in a bucket, using a drill mixer, and boiling water, with some accellerant. Pour into mould. Place some string loops into the mould, so that you can lift it out easily. Place top on mould. Cure, repeat. Edit the mould using a sander on a dremel, or a blowtorch.
Alternatively, you can use a greased concrete mould, if you saturate it with grease, and the relief angles are adequate. Having a valve or hole, to introduce compressed air or a hosepipe into the back, to press it out, may make it easier.
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