Browse Forums Owner Builder Forum 1 Dec 21, 2008 12:48 pm "The fearless are merely fearless. People who act in spite of their fear are truly brave" - James A. LaFond-Lewis Re: Things to look out for when doing the slab 4Jan 02, 2009 4:00 pm "The fearless are merely fearless. People who act in spite of their fear are truly brave" - James A. LaFond-Lewis Re: Things to look out for when doing the slab 9Jan 06, 2009 3:59 pm borg Slab will fail if it starts to crack significantly. This will most likely happen if you cut the steel mesh (reo). How deep and how long did they cut. Up to 2 metres. Partly through mesh and others surface channels. Done about 5 months ago. Only fine cracks developing from the point where it was cut - via stress risers? Re: Things to look out for when doing the slab 10Jan 12, 2009 12:23 am Hi Dymo69, no i dont think u'll have any trouble, i've just had an engineer friend of mine look at some fine surface cracks that have occured on my slab while i was away on holidays and i also asked about the situation u outlined.
he said fine cracks were shrinkage cracks due to hotter days- when we looked closely we found all the cracks are in the biggest open areas where the floor is exposed longest to the sun family room, lounge room & garage. there were no cracks in passages, bathrooms, laundry, office, smaller bedrooms or pantry - walls closer together & keep sun off the floor in these areas. b4 i went away i was keeping slab moist, & delayed putting roof on to allow the internal bricks to completely dry after our wetest ever Nov so that i wouldn't have trouble with render lifting. i've never had shrinkage cracks occur in a slab b4, but engineer says there are more slabs with them than without these days! it appears to me that some of this may happen becos of the extra chemical curing agents they put in these days, don't get me wrong i also recon that todays slabs are very, very strong & far better than old days, but IMO part of the trade off for strength is these surface cracks that again IMO probably happen becos the surface material is a lighter density than main core - ie trowelling machine brings sand, finer aggregate & water to the surface. my slabs has been down for 5 months & the engineer said that major structural cracks usually occur soon after the slab is poured, open up very quickly & get relatively wide very quickly, u can put a coin in them! if these do happen, today there are a lot of ways to stabilise problems with pins & special glues!!! so if ur cracks r fine cracks they could well still be shrinkage... cheers tony Re: Things to look out for when doing the slab 11Jan 12, 2009 9:15 am Quote: he said fine cracks were shrinkage cracks due to hotter days- when we looked closely we found all the cracks are in the biggest open areas where the floor is exposed longest to the sun family room Our slab's been baking in this blasted heatwave for 3 weeks. It developed quite a few cracks in spite of the thorough wetting in the first 10 days, some of them running all the way across, but they all seem to be surface. I'll have someone to come and have a look at it. Chris My father rode a camel, I drive a car, my son flies in a jetliner, his son will ride a camel.Saudi saying The DIY project can be broken into two major steps. Planning and Design and Construction. Both of these steps are as important as one another to ensure you give… 0 5416 Hi group, have some damage to the door frame and skirting board. It's a side door to the laundry area. Only has a security door. I had a termite inspection (note drill… 0 5632 0 2383 |