Joea, if you are on reactive/problem soil, I read in the AS for plumbing that compacted clay is required and not crushed rock/gravel. So I guess it may depend on your situation
Browse Forums Building Standards; Getting It Right! Re: Protecting your Slab 401Feb 24, 2015 8:05 pm Joea, if you are on reactive/problem soil, I read in the AS for plumbing that compacted clay is required and not crushed rock/gravel. So I guess it may depend on your situation Re: Protecting your Slab 402Feb 24, 2015 8:07 pm Slab Heave Recipient Joea, if you are on reactive/problem soil, I read in the AS for plumbing that compacted clay is required and not crushed rock/gravel. So I guess it may depend on your situation I'm on reactive H class soil. Thanks for the information I will try and hunt down a reference somewhere Re: Protecting your Slab 403Feb 24, 2015 8:08 pm Check out the slab heave thread, I'm pretty sure I posted that info whilst trying to assist another member. Re: Protecting your Slab 404Feb 24, 2015 8:19 pm Slab Heave Recipient Check out the slab heave thread, I'm pretty sure I posted that info whilst trying to assist another member. Cheers will do Re: Protecting your Slab 405Mar 05, 2015 2:24 pm Slab was poured yesterday. Not really happy with the quality of it. A lot of 'honeycombing' and it was pointed it out to me already that the front storm water point should be 150 mm from the concrete slab. I have forwarded the pictures to my inspector already....
You guys are going to have a field day with these photos! Any advice or issues you can see that I have missed are welcome. Also, can anyone advise what the best way to rectify the 'honeycombing' is? http://s1371.photobucket.com/user/joeas ... lab%20Pour *Edit added photos instead of link only. http://i1371.photobucket.com/albums/ag297/joeassi/Slab%20Pour/IMG_1445_zpsozmuiyiz.jpg http://i1371.photobucket.com/albums/ag297/joeassi/Slab%20Pour/IMG_1439_zps2aj1ifsz.jpg http://i1371.photobucket.com/albums/ag297/joeassi/Slab%20Pour/IMG_1437_zps25q15y3j.jpg http://i1371.photobucket.com/albums/ag297/joeassi/Slab%20Pour/IMG_1436_zpscjntptuk.jpg http://i1371.photobucket.com/albums/ag297/joeassi/Slab%20Pour/IMG_1434_zps1lran8xo.jpg http://i1371.photobucket.com/albums/ag297/joeassi/Slab%20Pour/IMG_1423_zpsqnkb3sf1.jpg http://i1371.photobucket.com/albums/ag297/joeassi/Slab%20Pour/IMG_1426_zpsak66ovik.jpg Re: Protecting your Slab 406Mar 05, 2015 2:49 pm Joea, rather than point us to another site, load them on here. Photobucket takes an age to load particularly on my ancient Mac. While there is some honeycombing it isn't that bad and certainly not as bad as some of the photos of slabs that have been posted onto these forums. I don't know why a lot of concreters don't use a vibrator to compact their pours better ? Concreting 101. Stewie Re: Protecting your Slab 407Mar 05, 2015 2:58 pm Stewie D Joea, rather than point us to another site, load them on here. Photobucket takes an age to load particularly on my ancient Mac. While there is some honeycombing it isn't that bad and certainly not as bad as some of the photos of slabs that have been posted onto these forums. I don't know why a lot of concreters don't use a vibrator to compact their pours better ? Concreting 101. Stewie Stewie D, Apologies for the inconvenience. I usually use Photobucket to post photos on here so I thought instead of 'cluttering' this topic with 5-10 photos I would reduce it to one simple link. Thanks for the feedback. Yes I agree and even the night before, the inspector specifically requested them to make sure they vibrate the slab properly. They assured us they would but it seems they didn't really care. I have also been told that this could also because the concrete was poured a little dry? Not sure if that means they took to long too pour or it didn't have enough water in it. Makes me wonder what the concrete is like on the inside and centre of the slab. I'm hoping it won't be found to be a structural issue. Cheers. Re: Protecting your Slab 409Mar 05, 2015 7:28 pm Crazyk While it is not a model slab, it certainly isn't the worst I've seen. I suspect they may just epoxy grout up those sides. I agree Re: Protecting your Slab 410Mar 05, 2015 8:11 pm tlblhayward Crazyk While it is not a model slab, it certainly isn't the worst I've seen. I suspect they may just epoxy grout up those sides. I agree Thanks guys, yes I agree it's not the worst I've seen either but it's bad right? Should I be concerned about the integrity of the slab? The thing that s**ts me is that the same team poured two other PD slabs opposite us and although half the size of ours about 95% of those slabs looks good. Good for those home owners but not us Re: Protecting your Slab 411Mar 15, 2015 3:40 pm Hi all, I went out to our site today and marked all the areas I wanted repaired on the slab. Yes, this was communicated with our builder and they agreed with it. As CrazyK said, they will be using some structural grout to fix those areas. I have put up some photos on our blog. http://www.dunedin29.blogspot.com.au/20 ... arked.html One thing I did find was that the 'hole' in the slab for the bathtub uncovers the waffle pods below. I'm pretty sure this is a termite risk and a pretty serious issue. Can anyone confirm? Thank you. Re: Protecting your Slab 412Mar 15, 2015 4:21 pm Joe... the photo of the stormwater pipe IN the slab is a big worry to me. Unless I'm mistaken, stormwater pipes are meant to be not just outside the slab but a minimum distance away from it. One of ours was moved because it was too close. The visible waffle pod has got me confused!? I don't understand why they need a gap in the slab around the pipe at all!? Re: Protecting your Slab 413Mar 15, 2015 4:39 pm tlblhayward Joe... the photo of the stormwater pipe IN the slab is a big worry to me. Unless I'm mistaken, stormwater pipes are meant to be not just outside the slab but a minimum distance away from it. One of ours was moved because it was too close. The visible waffle pod has got me confused!? I don't understand why they need a gap in the slab around the pipe at all!? Hi Brenton, Yes it is a big stuff up on their behalf and our independent inspector didn't pick it up either. They are going to relocate that pipe to 150 mm from the slab edge and 'repair' the slab. As for the hole in the slab. I'm guessing it's because the bath tub goes in that section and the plumbing needs to be done under it. If not, we have a big problem. Can anyone confirm if this is true? Is a hole in a slab required around the drain of the bath tub? Thank you. Re: Protecting your Slab 414Mar 15, 2015 4:41 pm Baths do not go into the slab, they are framed and sit above it. How are they going to repair the slab when there is meant to be steel in the edge beam? Re: Protecting your Slab 415Mar 15, 2015 4:45 pm tlblhayward Baths do not go into the slab, they are framed and sit above it. How are they going to repair the slab when there is meant to be steel in the edge beam? I know that... I am talking about the drain from the bottom of the bath tub. Is there enough clearance between the bottom of the bath tub and the slab to do the plumbing? I'm not sure on the details of the repair. Waiting to hear back or see how they repair it then I can comment. Re: Protecting your Slab 416Mar 15, 2015 4:48 pm joea tlblhayward Baths do not go into the slab, they are framed and sit above it. How are they going to repair the slab when there is meant to be steel in the edge beam? I know that... I am talking about the drain from the bottom of the bath tub. Is there enough clearance between the bottom of the bath tub and the slab to do the plumbing? I'm not sure on the details of the repair. Waiting to hear back or see how they repair it then I can comment. Keep us updated with what they propose. Re: Protecting your Slab 417Mar 15, 2015 4:49 pm tlblhayward joea tlblhayward Baths do not go into the slab, they are framed and sit above it. How are they going to repair the slab when there is meant to be steel in the edge beam? I know that... I am talking about the drain from the bottom of the bath tub. Is there enough clearance between the bottom of the bath tub and the slab to do the plumbing? I'm not sure on the details of the repair. Waiting to hear back or see how they repair it then I can comment. Keep us updated with what they propose. For sure. The blog/forum will be the first to be updated. Re: Protecting your Slab 418Mar 16, 2015 6:35 am Your inspector should be giving you all the answers you ask on this forum. Yes the void is required for plumbing under bath and remember they have to fit "S" trap to stop sewer gasses so they do need working room, however if they have taken it too deep and exposed waffles then your slab is no longer integral termite barrier. Repairs and treatment will be required. If your inspector is also accredited timber pest inspector then he will know how repairs have to be done. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Protecting your Slab 419Mar 16, 2015 7:25 am building-expert Your inspector should be giving you all the answers you ask on this forum. Yes the void is required for plumbing under bath and remember they have to fit "S" trap to stop sewer gasses so they do need working room, however if they have taken it too deep and exposed waffles then your slab is no longer integral termite barrier. Repairs and treatment will be required. If your inspector is also accredited timber pest inspector then he will know how repairs have to be done. Hi Branko, I have forwarded my questions onto my building inspector. I do like to discuss these questions on the forum as I hope that one day others may benefit from the answers given by professionals such as yourself. Thank you for your answer. It is as I suspected but appreciate the expert advice. I will follow it up. Re: Protecting your Slab 420Mar 16, 2015 7:38 am Just looking from a distance: The bath 'blockout' is pretty normal. A foam block installed prior to the concrete being poured around it, once cured is removed. To me the edges look rough because the forms were taken off (or the supports taken away) early and the slurry layer has pulled off revealing some honeycombing. Yes the edges could have been vibrated more, will there be any degradation as a result? Well 'parge' the edge and make sure it doesn't have an effect. Pretty simple really. Where you are coming from is where you are going to... Thanks for the insights, that makes perfect sense, and yeah, I will be leaning on the experience of the excavator operator entirely. 6 16106 4 6194 The concreter will take and reuse. In my case I bought structural LVLs and scraped them back and used them as joists. 1 5150 |