Browse Forums Paving & Concreting 1 Jun 24, 2013 12:04 pm Hi guys, i am looking or somewhere to buy sand and gravel mix for a concrete slab in Brisbane. any recommendations would be much appreciated. On that note is the correct micture for a small slab 1:2:4, cement sand gravel 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 18294 I'm putting a new floor in my kitchen, slate flagging on a standard concrete slab. I have allowed for a bed thickness of up to 20mm to accommodate the different… 0 17536 |