Expanding bolts into concrete...

Get the test-tube cleaner brush and hoover out this time!

Reply to
Andy Burns
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Might do...

None of the ones that came out had the cross-cut wedged full of dust, though, as you'd expect if that was the problem.

Reply to
Adrian

Get them out, and use resin to embed anchor bolts in whatever ugly hole you're left with?

Reply to
Zapp_Brannigan

You don?t need to do that with that design of bolt.

Reply to
sam

In message , JimK writes

Angle grinder:-)

No seriously! Angle grind a shallow slot either side of the pin and use a claw hammer or wrecking bar to lever it out.

Reply to
Tim Lamb

Those bolts turned up, and have been fixed. To start with, I thought we'd got a similar raging f*ck-up - they just did not want to go into the holes I'd drilled out to 20mm. A bit of gentle tapping got the first one far enough in to be THOROUGHLY not-coming-out-again, but gentle tapping got it no further in. Hitting hard with a piece of wood as a bolt-end- protector didn't do much, either.

Remove the bit of wood, and batter away with the club hammer, and they did go all the way home. And they are NEVER coming out again... The ramp is now properly bolted down, and all finished and tested. I'm just waiting for a 30mm socket to arrive, then I can properly torque the nuts, instead of just nipping 'em up - then we can shove a car into the air.

Thanks for all the suggestions. Last week was a bit stressful because of this...

Reply to
Adrian

Have you checked the size of your drill? Masonry bits wear out and get skinnier quite quickly.

Tim

Reply to
Tim+

Hadn't thought about that. The 19mm SDS I was using was brand new. The

20mm is older and of unknown history (sourced from freecycle) but looks like it's not done too much more than help fill a shed up.
Reply to
Adrian

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