Browse Forums DIY, Home Maintenance & Repair 1 Jun 24, 2013 12:02 pm Hey Guys, i am looking for somewhere to buy sand and gravel mixture for a concrete slab in Brisbane. Any good recommendations would be much appreciated. there is only 20% difference in concrete strength between 20 mpa and 25 mpa, so check with your engineer first if it fits his calculation tolerances. There are ways to… 6 18776 2 4711 2 10303 |