Spray Bitumen onto Concrete

[Bungee123]

Can anyone advise me please. We want to apply bitumen onto concrete walls which have cracked. Quite a large area so spray on preferred. Concrete is new and has plenty of reinforcement. Cracks are 0.2mm-1mm maximum. Thanks

 

[stretch3050]

Chap near me does a spray called rubber spray solutions. https://www.rubberpraysolutions.co.uk/

 

[S J H]

I think you'll struggle if it's proper bitumen. If you warm it up it will go on with a brush like normal paint.

 

[Stock]

There are two part silicone based products for what you want, often referred to as brown and black jack. This is what i would recommend as it can be sprayed on rolled on and is easily repaired.

It will require two coats which is why you have 2 colours.
http://www.gardner-gibson.com/products/waterproofing/black-jack-6125-9-30---wp

 

[Unbrako precast]

If you hire a good "airless sprayer" you would only need to thin it slightly or warm it up as suggested , if you use bitumen . They are very fast , alternatively a roller is good enough if you haven't got a huge area to do.

 

[rob1]

are you gpoing to store grain/rape in it ? Dont think thats allowed now,if muck silage guess thats ok

 

[Bungee123]

Thanks for your comments folks, it's for the walls of an AD plant. Quite a large area but not sure whether we need to do the whole thing or just the cracks? Any suggestions appreciated

 

[Stock]

Thanks for your comments folks, it's for the walls of an AD plant. Quite a large area but not sure whether we need to do the whole thing or just the cracks? Any suggestions appreciated

If you have cracks that will allow water or acidic compounds to access the re-bar then all of the concrete exposed will need to be covered with at least two coats. Now the larger gaps should be fixed with a repair grout like Fosroc http://www.fosroc.com/products/by-solution/concrete-repair/

 

[RWG Contracts]

Thanks for your comments folks, it's for the walls of an AD plant. Quite a large area but not sure whether we need to do the whole thing or just the cracks? Any suggestions appreciated

How deep are the cracks? Any pictures?

 

[Unbrako precast]

It's unusual to have cracks on a shuttered face , did it cure to quickly or was there no expansion joints and it's made some ?

 

[Bungee123]

It's unusual to have cracks on a shuttered face , did it cure to quickly or was there no expansion joints and it's made some ?

It's a long story but the original designs did have expansion joints but a 'professional' insisted they were removed and extra steelwork put in instead, basically we had no choice but to remove them!

 

[RWG Contracts]

It's a long story but the original designs did have expansion joints but a 'professional' insisted they were removed and extra steelwork put in instead, basically we had no choice but to remove them!

Make the professional pay

 

[milkloss]

It's a long story but the original designs did have expansion joints but a 'professional' insisted they were removed and extra steelwork put in instead, basically we had no choice but to remove them!

Was this 'professional' a family member? It usually is

 

[Pond digger]

Could it be lined with fibreglass? Would be pricey I suspect.

 

[Bungee123]

Was this 'professional' a family member? It usually is

No, it was a proper professional with letters after there name and an 'I know all the answers' attitude!!!

 

[Stock]

No, it was a proper professional with letters after there name and an 'I know all the answers' attitude!!!

If this is the case why is one here asking the great unwashed for information and direction...........................

 

[milkloss]

If this is the case why is one here asking the great unwashed for information and direction...........................

Yes, he should have professional insurance. Knock it down and start again? (Or at least get the cash so you could if you wanted to!)

 

[Bungee123]

Just looking for some advice re the fix thanks folks, whose to blame is being dealt with through the proper channels

 

[RWG Contracts]

No, it was a proper professional with letters after there name and an 'I know all the answers' attitude!!!

I have letters after my name but I definitely wouldn't call myself a professional

 

[Unbrako precast]

I would chase them out with a 5" angle grinder and decent width 5mm diamond blade , blow the dust out thoroughly and fill with a good quality polyurethane mastic , like "Soudal sudaflex" , or "Sika flow " .
Warm the tubes up and cut the nozzle thin so it gets right in , travel upwards wipe of flush and it shouldn't take any harm.

DON'T , leave any gaps and get it well in on a dry clean surface !!