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Aiah
243 Posts
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Aiah

Joined 13 December 2009
Bronze Member
5 years5 yearsAiahAiah posted:
Polished concrete

I was quoted 700+ per cu for a mix with off white cement...quite pricey.

5 years5 yearsAiahAiah posted:
Cost to have concrete driveway put in?

sounds very cheap.

6 years6 yearsAiahAiah posted:
2 pour slab

looks pretty good to me.
dang you got some retaining to do!

6 years6 yearsAiahAiah posted:
2 pour slab

I did one about 20 years ago, put all the steel work in as usual for the whole job as if it was going to be a single monolithic pour.
poured…

6 years6 yearsAiahAiah posted:
2 pour slab

If engineer has okay,d it all should be well.

6 years6 yearsAiahAiah posted:
2 pour slab

I wanna see pics if they do it in 2 pours.
ill be suprised if engineer would even let them.

6 years6 yearsAiahAiah posted:
2 pour slab

I wouldnt want it done like that, but it can be done, make sure the engineers know, and that they take adequate steps to waterproof the joint.
Would be better…

6 years6 yearsAiahAiah posted:
3 Year old slab moving, now blamed on Landscaping

This could happen to any type of slab, the cover is far likely to remain more constant on a waffle slab if anything.
I deal with many engineers, each seem to…

6 years6 yearsAiahAiah posted:
P Class Slab - what is involved in laying

Ive seen P sites with 100mm polystyrene sheets laid onto the plastic membrane and then the 300mm waffle pods laid on top of them.
the slab was completely isolated from the…

6 years6 yearsAiahAiah posted:
Waffle pod slab and piers.

If I were to have a waffle slab, id insist on 350mm piers at 1800mm spacing, no less than 600mm deep around the entire perimeter of the house.
I've seen…

6 years6 yearsAiahAiah posted:
3 Year old slab moving, now blamed on Landscaping

Builders are at the mercy of engineers, if it was expensive and failed, it wasnt expensive enough, engineers should have "engineered" your foundations to work.

6 years6 yearsAiahAiah posted:
coloured concrete curing question of concern - please help!

Its true, concrete can look mottled or blotchy as it cures.
Is it coloured through mix? throw on colour?
Photos would help.

6 years6 yearsAiahAiah posted:
3 Year old slab moving, now blamed on Landscaping

@Adam.m
The waffle design looks far more rigid than a raft slab, unless there are key joints how are they designed for movement?

6 years6 yearsAiahAiah posted:
3 Year old slab moving, now blamed on Landscaping

I don't see the logic in excavating into a highly reactive site and encasing large sections of it inside a raft slab.
Both a raft and waffle slab should be resting…

6 years6 yearsAiahAiah posted:
3 Year old slab moving, now blamed on Landscaping

It can happen to any slab that's either incorrectly engineered or installed.
If i had a P class site, id prefer a waffle slab.

6 years6 yearsAiahAiah posted:
cost for drop edge beams - concrete slab

Id say the price includes everything else extra that goes along with dropped edge beams.
more work, more excavations, more steel, more concrete, more bricks + 20-30% builders margin....

6 years6 yearsAiahAiah posted:
Polished concrete benchtops

Cheng does some really cool stuff with concrete.
I went to one of his showrooms in San Fran.
won one of his awards too.... http://www.concreteexchange.com/2011-be ... arity.html

6 years6 yearsAiahAiah posted:
Slab over existing slab?

If the garage slab has a 1200 high corefilled retaining wall on it, another 100mm of concrete over the top aint going to be a problem.
Ive done dozens of them.

6 years6 yearsAiahAiah posted:
Slab over existing slab?

how deep are the edge beams in the existing slab?
I personally wouldn't be overly worried about the weight, the load is spread out.
Its a simple procedure, no need to complicate…

6 years6 yearsAiahAiah posted:
Slab over existing slab?

Just pour over the top, Throw down some filll dust to save on concrete, scrape a few thickened beams in and cover with plastic.
If the existing slab is already piered…

6 years6 yearsAiahAiah posted:
Thickness of concrete vs. mesh size

In my experience the higher the mpa, the nicer the crete is to work with. 80 slump 32mpa is always better to work with than 80 slump 20mpa.

6 years6 yearsAiahAiah posted:
Thickness of concrete vs. mesh size

Why is 32mpa harder work than 20 or 25?

6 years6 yearsAiahAiah posted:
Rendering concrete floor

There are coatings available... ive never seen one thats looks particularly good.

6 years6 yearsAiahAiah posted:
Thickness of concrete vs. mesh size

correct

6 years6 yearsAiahAiah posted:
Thickness of concrete vs. mesh size

The 82 was standard for the H class slab, the engineer beefed it up because she was having it polished

6 years6 yearsAiahAiah posted:
Thickness of concrete vs. mesh size

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,…

6 years6 yearsAiahAiah posted:
Thickness of concrete vs. mesh size

i wouldnt go any smaller than 72 for a driveway, even at 80mm it will be fine

6 years6 yearsAiahAiah posted:
Thickness of concrete vs. mesh size

72 with 100mm is fine
ive seen 100mm slabs with F92 as specified by engineers

6 years6 yearsAiahAiah posted:
Slab poured - is this an issue?

I dont think you have an issue with slab strength, just the termites. as long as thats sorted, all is well.

6 years6 yearsAiahAiah posted:
Slab poured - is this an issue?

looks suss to me, need a better photo.
a piece of waffle pod may have been broken off and floated to the surface, if so, odd that it wasnt fixed on…

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Polished concrete
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Joined homeone
13 December 2009

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