fast set
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4,071 Posts
Calcium chloride
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5,832 Posts
Do you want the concrete to be harder or stronger? If you need a hard surface, that is controlled by the finish and use of hardener. If you need stronger, that is controlled by the mix.
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15,726 Posts
i don't need either, its just fence posts.
i saw that the fast set bags are nearly twice the price, and i wondered why.
and thought = if i can diy that myself, for a lot less cost, then "maybe" i would.
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4,071 Posts
If you do use an accelerator, be very careful when mixing as you could cause a flash set, probably would be better if you don't use it, being it's only fence posts.
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2,736 Posts
Has anybody tried the expanding foam stuff for setting a post?
http://www.homedepot.com/p/Sika-33-fl-oz-Fence-Post-Mix-483503/205671519
I am itching for a job where I can try this out.
http://www.homedepot.com/p/Sika-33-fl-oz-Fence-Post-Mix-483503/205671519
I am itching for a job where I can try this out.
A small hanful of this per bag will make a huge difference in set times:
http://www.homedepot.com/p/Snow-Joe...loride-Crystals-Ice-Melter-MELT25CC/205668915
http://www.homedepot.com/p/Snow-Joe...loride-Crystals-Ice-Melter-MELT25CC/205668915
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15,726 Posts
now THAT is interesting. i think i already have some.
would that effect the strength of the concrete ?
please be a little more specific about "huge"
This should be more informative than the "off the hip" info I supplied you with earlier:
http://www.calciumchloride.com/concrete.shtml
http://www.calciumchloride.com/concrete.shtml
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15,726 Posts
excellent, thanx !
but, i am having trouble figuring out just how much to add. 2% flake, i know i don't have flake. perhaps i cannot even use the stuff i have.
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In flake form, you would use 2 lbs. per 100lbs. of cement per cu. yd. for 2%ca cl, in liquid form it would be 2 qts. per 100 lbs. and never use more than 2% solution.
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i have MORTON SAFE-T-MELT , safe for plants. its not flake, but it is small rocks. smaller than regular rock salt. i bought this assuming it was safer than salt, to use on my old PT front steps.
my understanding is that Calcium Chloride is not salt, is that right ?
my understanding is that Calcium Chloride is not salt, is that right ?
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4,071 Posts
No, it is salt, and the reason i said not to exceed 2% in solution is because it can have the opposite effect and act as a retarder instead of an accelerator.
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17 Posts
I have used a lot of the foam for posts and love it. You can buy 4 gallons off Amazon for $150, kind of expensive but I am barb wire fencing my 26 acres, so getting concrete to all holes is very difficult, my skid steer can not even get to all the places needed. The foam is said to also seal the post from below ground rot. Getting the right amount mixed is a learning curve, it also depends on the air temperature for the rise of the mix. But it cures quickly and is rock solid.
I don't know why you would need fast setting mix? Do not add as much water and it will set very rapidly.
I don't know why you would need fast setting mix? Do not add as much water and it will set very rapidly.
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