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Any concrete experts? (Different Q) Al Bundy 09-16-2006
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Posted by on September 17, 2006, 8:53 am

Al Bundy wrote:
> The other day I noticed a small hole (2" maybe) right in the middle of the
> concrete driveway. Concrete around it is in good shape. Funny though.
> Concrete appears to be somewhat thin because dirt appears to be where the
> hole is. Maybe piss-poor high spot when originally done many many years
> ago.
>
> I know I need to do something because the surface water when it rains is
> gonna make it get bigger at an accelerated rate now. Why the hole appears
> is another separate issue of course.
>
> Should I dig out dirt with like a screwdriver down a few inches and fill it
> with concrete? I know concrete would be better but what about mortar mix. I
> have a partial bag of that laying around. Could toss in some small stones.
>
> Yea I know. I could start digging out those few inches and find there is a
> bottom of the iceberg hole underneath. I'll have to tap around the hole to
> see what it sounds like.

If your mortar mix has been laying around, it might have gone bad.
Make up a small test batch first to make sure it sets up well.

My big box store sells 10-lb baglets of concrete and mortar mix for ~
$2.

I use latex-modified concrete whenever possible. It makes small
repairs much more durable. The bottled -latex has a good shelf life
so you can keep it around for next year's projects. I have a six
year old bottle which still does the job.


Jason


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Posted by Al Bundy on September 17, 2006, 8:12 pm
jazon48@yahoo.com wrote in

>
> Al Bundy wrote:
>> The other day I noticed a small hole (2" maybe) right in the middle
>> of the concrete driveway. Concrete around it is in good shape. Funny
>> though. Concrete appears to be somewhat thin because dirt appears to
>> be where the hole is. Maybe piss-poor high spot when originally done
>> many many years ago.
>>
>> I know I need to do something because the surface water when it rains
>> is gonna make it get bigger at an accelerated rate now. Why the hole
>> appears is another separate issue of course.
>>
>> Should I dig out dirt with like a screwdriver down a few inches and
>> fill it with concrete? I know concrete would be better but what about
>> mortar mix. I have a partial bag of that laying around. Could toss in
>> some small stones.
>>
>> Yea I know. I could start digging out those few inches and find there
>> is a bottom of the iceberg hole underneath. I'll have to tap around
>> the hole to see what it sounds like.
>
> If your mortar mix has been laying around, it might have gone bad.
> Make up a small test batch first to make sure it sets up well.
>
> My big box store sells 10-lb baglets of concrete and mortar mix for ~
> $2.
>
> I use latex-modified concrete whenever possible. It makes small
> repairs much more durable. The bottled -latex has a good shelf life
> so you can keep it around for next year's projects. I have a six
> year old bottle which still does the job.
>
>
> Jason
>


Thanks for the reply. I got the mortar mix less than a month ago. It
should be good if I choose to go that route.


Posted by RicodJour on September 17, 2006, 11:25 am
Al Bundy wrote:
> The other day I noticed a small hole (2" maybe) right in the middle of the
> concrete driveway. Concrete around it is in good shape. Funny though.
> Concrete appears to be somewhat thin because dirt appears to be where the
> hole is. Maybe piss-poor high spot when originally done many many years
> ago.
>
> I know I need to do something because the surface water when it rains is
> gonna make it get bigger at an accelerated rate now. Why the hole appears
> is another separate issue of course.
>
> Should I dig out dirt with like a screwdriver down a few inches and fill it
> with concrete? I know concrete would be better but what about mortar mix. I
> have a partial bag of that laying around. Could toss in some small stones.
>
> Yea I know. I could start digging out those few inches and find there is a
> bottom of the iceberg hole underneath. I'll have to tap around the hole to
> see what it sounds like.

Hydraulic cement would be the best choice. It expands as it sets so it
will really lock into the hole (clean the edges like you're going to
eat off of them), and the stuff is waterproof. It won't match the
existing driveway concrete, but neither will anything else you do.

R


Posted by Al Bundy on September 17, 2006, 8:50 pm

> Al Bundy wrote:
>> The other day I noticed a small hole (2" maybe) right in the middle
>> of the concrete driveway. Concrete around it is in good shape. Funny
>> though. Concrete appears to be somewhat thin because dirt appears to
>> be where the hole is. Maybe piss-poor high spot when originally done
>> many many years ago.
>>
>> I know I need to do something because the surface water when it rains
>> is gonna make it get bigger at an accelerated rate now. Why the hole
>> appears is another separate issue of course.
>>
>> Should I dig out dirt with like a screwdriver down a few inches and
>> fill it with concrete? I know concrete would be better but what about
>> mortar mix. I have a partial bag of that laying around. Could toss in
>> some small stones.
>>
>> Yea I know. I could start digging out those few inches and find there
>> is a bottom of the iceberg hole underneath. I'll have to tap around
>> the hole to see what it sounds like.
>
> Hydraulic cement would be the best choice. It expands as it sets so
> it will really lock into the hole

Makes sense.

> (clean the edges like you're going
> to eat off of them),

May not be clean enough. Have chowed a sandwich with portland cement dust
on me and around. Hopefully it only causes cancer in California. I'm not
in CA :-)

> and the stuff is waterproof. It won't match the
> existing driveway concrete, but neither will anything else you do.

Kinda hard to mix up time as an ingredient.

>
> R
>


Thanks for the reply...

Posted by John Hines on September 19, 2006, 6:46 pm

>> and the stuff is waterproof. It won't match the
>> existing driveway concrete, but neither will anything else you do.

Being a driveway, carefully placed oil drips will do the job of
camouflage in no time at all.


--
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