I have to set a bunch of anchors in new (poured friday) concrete using Hilti hy150 epoxy. I have never worked with this stuff and any ideas/comments/guidance would be appreciated. My big questions are
1) How long of a set time do I have?
2) Clean up and what type of personal protective gear? I assume disposible gloves, but what else.
3) How full do I fill the drilled holes?
As far as to why I am drilling in anchors when the ‘crete was just poured, ask the engineer. It is his idea.
I meditate, I burn candles, I drink green tea, and still I want to smack someone.
Replies
about seven minute
gloves it doesnt come off, the skin will first
all the way
make sure you clean out the hole.
make sure you clean out the hole
make sure you vaccum out the hole
did I mention yet make sure you clean the dust out the holes
BB,How important is it to clean out the holes?
I was planning on an air compressor and blowing out the hole. What do you think?I meditate, I burn candles, I drink green tea, and still I want to smack someone.
we alway make them vaccum or blow the hole and then have a small bottle brush and brush the hole. If there is just a little cement dust the epoxy will stick to the dust and pull right out. the epoxy need to stick to the concrete and not the dust.did I mention you need to clean the hole, it might help
As brownbagg mentioned-Clean out the hole and depending on how hot it is you have a couple of minutes. I usually get everything prepped which includes
1) All holes drilled
2) All holes vacuumed and cleaned and cleaned again
3) Bolts with nut and washer next to hole
4)All holes cleaned again.
5) Hammer and wrench ready.
Then we bust open the epoxy and put on the mixer head. Squeeze in enough to fill hole-tap in bolt-keeping thread clean-move onto the next one. The biggest pain with the system is the mixer sometimes cures shut if you do not move fast enough so have extra mixer nozzles at hand-not necessary if you are able to get them in quick. Do not fill a hole with epoxy until you are ready to set the pin-Hard to get in if it cures-don't ask how I know.
Bruce
What hiker said pretty much covers it - I have the Hilti MD 2000 cartridge gun which works
well . The extra mix spouts are essential . I also keep rags and a bucket nearby for drips and
screwups -as was mentioned it sticks to everything permanently. Good luck.
The weather is calling for 50 degrees and light rain- Should I be concerned?
Thanks to everybody for the helpful informationI meditate, I burn candles, I drink green tea, and still I want to smack someone.
The 50* temp will give you more working time than if it was 70*. If you drill your holes just prior to setting the pins/ rods, you won't have wetness issues.Do not vacuum the holes. Blow them out instead with compressed air - a lot. You're done blowing when no dust comes out, at all. We use a tip that goes 4" into the hole. A vacuum may not be able to reach the dust in the bottom of the hole.Depending on the size of the pin/ rod, you only need to fill the hole 1/2 - 2/3 full. Any more than that and you'll have a lot of squeeze-out, more of a mess and more crape to cut away so your 2x's will sit flat. By your second one, you'll have the amount figured out.Have the rods set next to each hole. Preparation and organization is key.Insert the nozzle all the way in and start to pull out after you start pulling the trigger. We buy extra nozzles ($1@). Be sure to buy the correct type.Insert rod while turning it - half turn.Fill, insert. Fill, insert. Fill, insert. Etc.3/8" rod = 7/16" hole.
1/2" rod = 5/8" hole.
5/8" rod = 3/4" hole.
3/4" rod = 7/8" hole.Hope this helps,Frankie
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I need to ask ... does the concrete need to cure a week or more before setting the anchors? I have used the epoxy anchors several times, but it was always on well cured concrete. The day after the bolts were set, we had a testing lab come in and do a pull test on every bolt. I have had some fail.
"Put your creed in your deed." Emerson
"When asked if you can do something, tell'em "Why certainly I can", then get busy and find a way to do it." T. Roosevelt
By the time weget there, the 'crete will have cured for 4 days. The anchor bolts are for a brackets that bolt to the bottom of a timber post. The brackets are part of the anchor system for a timberframe picnic pavilion. The engineer spec'd (4) 1 inch by 12 inch long bolts per post base. The original idea was that the steel post bases would be incorperated into the pour, but they need to be in the exact spot for our timberframe. And as how the timberframe is still being built, it would have been difficult to give the concrete crew the measurements. The idea behind such mammoth post bases is to anchor the building against up-thrust. The weight of the building will keep it down- Mostly white oak.I meditate, I burn candles, I drink green tea, and still I want to smack someone.
One addition to all the other suggestions, Cut the bottom of the anchor on an angle (if it isn't already done) so the anchor doesn't hydraulic. It will make it easier to go in and will keep it from popping itself back up.