Browse Forums Paving & Concreting Re: Thickness of concrete vs. mesh size 21Oct 30, 2014 8:37 am Decided to bump this as I have a similar question. Which is better if it matters from driveway, carport, patio and perimeter? Thicker concrete (100mm or 110mm) or stronger mesh (SL72 or SL82), will be getting 32mpa if it helps Has anyone done an exposed aggregate for driveway, carport and front perimeter but used coloured concrete for the rest of the house? Is there a huge difference between coloured and natural grey concrete? $? Sealing? Cheers! http://boostaoakfordsa.wordpress.com Site works: 26/8/14 Trench: 2/9/14 Slab: 8/9/14 Frame: 18/9/14 Bricks: 24/10/14 2nd fix: 24/11/14 Handover: End Feb 2015 Re: Thickness of concrete vs. mesh size 22Oct 30, 2014 8:38 pm Higher MPa concrete will be stronger and more durable however increasing reo can also be beneficial as it will give greater tensile strength capability to the concrete. For a driveway I wouldn't bother with the reo just the concrete. Most driveways crack because of poor workmanship. Very rare will you see these guys use bar chairs to correctly space the reo for 25mm cover. They just throw the mesh on the ground and pull it up as they go. This leads to significant inconsistencies in reo height and ultimately renders it useless because it will rust & expand because of inadequate cover and crack the concrete. Re: Thickness of concrete vs. mesh size 23Nov 07, 2014 9:39 am Aiah My sisters house slab was double layer of SL92 @ 100mm thick. The slab was to be polished, she had the engineer drop the spec to one layer of 82, she wanted some cracking... she got it. MY last shed slab had one layer of SL62, still totally crack free years later. Re: Thickness of concrete vs. mesh size 24Nov 07, 2014 9:52 am Lex but by the looks of it, even if they "promise" a 100mm thick concrete, it may very well be 60 or 80 at places, IT most definitely should not be. 100mm is the minimum thickness, and when doing the boxing, in places it will be up to 50mm deeper (ie 150mm) to make sure the minimum is maintained. Re: Thickness of concrete vs. mesh size 25Jan 28, 2015 7:44 pm need some advice here.. Got the below quote from my 'prospective builder".. "We use 100mm concrete, MPA25 hard concrete SL92 mesh and n 16 bars" Can anyone enlighten me are the above speces standard for builders (in Victoria) or higher quality ?? Re: Thickness of concrete vs. mesh size 26Jan 28, 2015 9:55 pm annielee need some advice here.. Got the below quote from my 'prospective builder".. "We use 100mm concrete, MPA25 hard concrete SL92 mesh and n 16 bars" Can anyone enlighten me are the above speces standard for builders (in Victoria) or higher quality ?? That is a good basic spec for something like a driveway slab. But to get the best result you need to Lay the concrete on a well prepared base. Make sure the joints are done properly (see http://www.anewhouse.com.au/2012/11/con ... nt-joints/) Hold the reinforcement at the correct level with'Bar Chairs' Make sure no water is added at site (MPA25 concrete is the strength with the water added at the mixing plant and additional water will lower the final strength) Have the concrete properly vibrated. The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: Thickness of concrete vs. mesh size 27Jan 28, 2015 10:45 pm I think you will find for crack & tempreture control, it's min. cross sectional area of steel per m2 You also need to consider durability and min cover. As3600 doesnt refer to batching and mix ratios but I am sure there is more to consider than cement and water ratio (although very important) for eg aggregate size & grading , sand and moisture contents etc. Less water / leaner overall mix generally increases the strength of the concrete and reduces shrinkage cracking the concrete is harder to work and requires vibration etc IMO.chemicals to increase workability should be avoided. Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Thickness of concrete vs. mesh size 28Sep 10, 2015 1:48 pm Old thread but would like to ask question if someone is happy to help. Pouring concrete for garage floor. Which option is better? 1) 20mpa with 14mm stone from boral concrete, f53 mesh, 100 thickness 2) 20mpa, f62 mesh (is there a r62? i suspect it is a typo), 80mm thickness Timeline: viewtopic.php?f=31&t=76782 Re: Thickness of concrete vs. mesh size 29Sep 11, 2015 8:19 am Hi Sofia14 Do you have a large (heavy) or a small (light) vehicle? Is your driveway paved or concrete? For the heavy vehicle you want the the thicker concrete 6X6X.1m =3.6m3 they order 4m3 waste is used for the edge thickening 6x6x.08m = 2.88m3 they order 3m3 no thickening BTW it's now called SL62 mesh and its costs a couple of dollars extra p/m2 http://www.midaliasteel.com/products/mesh/ I would definitely upgrade mesh and make sure they compact the soil properly Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Thickness of concrete vs. mesh size 30Sep 11, 2015 10:27 am Light vehicle (sedan). Driveway will be paved. It is less than a meter in length, very short. Timeline: viewtopic.php?f=31&t=76782 Re: Thickness of concrete vs. mesh size 31Sep 11, 2015 6:11 pm I would go the 100mm slab thoughout w/- extra thickening abutting pavers and you should make sure you get it..HTH Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Thickness of concrete vs. mesh size 32Jun 27, 2020 10:10 am 150mm 32mpa slab. Sl82 or Sl92 what would you recommend? Will have heavy machinery at times on slab. Re: Thickness of concrete vs. mesh size 33Jun 27, 2020 12:26 pm Wirepower84 150mm 32mpa slab. Sl82 or Sl92 what would you recommend? Will have heavy machinery at times on slab. Probably SL81 but your engineer should specify. I would recommend to consider Cupolex system (cupolex.com.au) as it is can withstand load bearing pressure 6x+ of a standard slab (up to 100 Nm and with elastic response at 80 Nm!). And to achieve this you would only need 60 mm 25 mpa slab on top of 260 mm Cupolex with 668 mesh + D10 bars at 560 mm centers. MATE!!! I've checked their website and it's a 90% match at least. I've just called them and sent the pic through to confirm it's the same product. Thank you heaps. 3 6657 Hello everyone Please advice me how can I install mesh security window or we cab say mesh flyscreen inside while the pvc plantation shutters are already installed? Is… 0 11822 It is so easy to do yourself. Even if you are not very handy. You literally only need a few basic things from bunnings. Honestly even with the most basic skills I know… 3 823 |