Browse Forums Paving & Concreting 1 Aug 03, 2010 3:06 pm Hi Everyone, Its that time again, and we have decided to build a owner build a new house in WA (thread to come once I scan the drawings). We are intending to have approx 160m2 of polished concrete right through the middle of the house. Also we have around 220m2 of regular grey concrete to do. I was looking for any insight on how the slab should be poured, as this would involve 2 different concrete contractors, and would be very hard to arrange to be done the same day. Does anyone know how to go about laying a 2-part slab say, 2 weeks apart, expecially to minimise cracking/seperation and also with termite management? Or would be solution be to lay a complete slab, with the room to be polished sunken ~150mm into the ground, then to come in and fill this room in with the colored (and much more expensive) concrete for polishing later? Hoping someone who has a nice polished room in a recent build has some idea how the builder did the job Thanks, Russ Re: Polished concrete, slab pour? 2Aug 10, 2010 10:43 pm Pour the Polished mix to fill more area than you intend to polish and the rest is grey PM me if you need futher help Where you are coming from is where you are going to... Re: Polished concrete, slab pour? 3Aug 11, 2010 11:05 am Pouring the slab in 2 pours would cost you, both money and time. Ive worked on projects where the polished sections were recessed 100mm and poured after the build was at lock up. Cheapest and easiest option is Onc's, thats the way id have it done, be wary if you have a particularly finicky engineer tho, some wont like the idea of 2 different mixes in the same monolithic pour. Re: Polished concrete, slab pour? 4Aug 11, 2010 11:50 am Should be Ok if they are the same MPA. And continuous. Where you are coming from is where you are going to... Re: Polished concrete, slab pour? 5Aug 11, 2010 12:09 pm onc_artisan Should be Ok if they are the same MPA. And continuous. Yeah I wouldn't be worried about it. Poured a slab a few weeks ago only about 90sqm but was 300mm thick and a ridiculous amount of steel, Engineer wouldn't let us fill the bulk of the slab with grey concrete, had to use the same mix throughout. The special mix to polish was more than double the cost of normal 32mpa, ended up being a very expensive exercise. Re: Polished concrete, slab pour? 6Aug 11, 2010 9:49 pm Why not have the whole lot polished? You have to have flooring down and to our way of thinking, at least it is one floor finished early! We have gone for the whole downstairs including alfresco and portico ... and now probably kitchen bench tops. this stuff is pricey but so are tiles and wood! We have also stuck underfloor heating in ours ... and we are very excited to see the final product. I sound like I am Oncs paid advertiser but this guy is ever so easy to deal with, nothing is a hassle and he LOVES his work (or so it seems!) and so far, so good! Even my fussy husband is pleased! Re: Polished concrete, slab pour? 7Aug 12, 2010 2:23 am but I think that is the wrong way around. I should be telling everyone how easy it was to deal with you. Everything that could be organized ... was! You did make our lives easy by being prepared to hear what we had to say and we just worked with what we had. It was funny interacting with the other tradies, radiant heating and the plumber. It was quite cohesive. Even if it was a large footing set to do Anyhow, time for bed. Where you are coming from is where you are going to... Re: Polished concrete, slab pour? 8Aug 13, 2010 5:51 pm kayandandy Why not have the whole lot polished? You have to have flooring down and to our way of thinking, at least it is one floor finished early! We have gone for the whole downstairs including alfresco and portico ... and now probably kitchen bench tops. this stuff is pricey but so are tiles and wood! We have also stuck underfloor heating in ours ... and we are very excited to see the final product. I sound like I am Oncs paid advertiser but this guy is ever so easy to deal with, nothing is a hassle and he LOVES his work (or so it seems!) and so far, so good! Even my fussy husband is pleased! Hi Kayandandy, Do you have some pics of your floor. Would love to see them. We are having Polished Concrete but the grano is too busy working to take pictures. Your concreter sounds like a good bloke. Hope mine is just as good Re: Polished concrete, slab pour? 9Aug 13, 2010 5:53 pm Where you are coming from is where you are going to... Re: Polished concrete, slab pour? 10Aug 13, 2010 6:00 pm Where you are coming from is where you are going to... The concreter will take and reuse. In my case I bought structural LVLs and scraped them back and used them as joists. 1 5855 yep, clearly mark where the infloor heating pipes are before drilling or nailing 1 6374 Building Standards; Getting It Right! is this for a residential dwelling or a shed? If its for a dwelling, its out of tolerance and a "mistakes happen" isnt a good enough excuse to just move on. 1 2696 |