POUR NEW CONCRETE OVER OLD?

[Don87]

the morer i readses, the cofuseder i gits!!!

:rotfl:

 

[mjaybee]

OK here's the last bit of advice you need. Like I said earlier, I've been in the concrete industry for 25 years but I'm 59 years old, so when my front and back patios were poured, I hired a concrete contractor to do the work and then I went to work, which was not pouring (and yes that is a correct term for it, as it pours out of a truck, it doesn't place out of a truck) it. My point is, hire a concrete contractor with experience.

 

[case245]

you can do it yourself all you need to get portland cement and sand mix it 50to1 its not that hard take your time

 

[mjaybee]

you can do it yourself all you need to get portland cement and sand mix it 50to1 its not that hard take your time

It may not look hard, but there's more to it then just getting cement and sand. I seen bad jobs from people who thought is wasn't that hard. Concrete is something you want to look good around your house. You don't want to do it twice.

 

[Rock knocker]

you can do it yourself all you need to get portland cement and sand mix it 50to1 its not that hard take your time

Check your math, aggregate has to be in there somewhere

 

[Carl Bert]

It may not look hard, but there's more to it then just getting cement and sand. I seen bad jobs from people who thought is wasn't that hard. Concrete is something you want to look good around your house. You don't want to do it twice.

Yeah I have to agree with mjaybee. Unless you can find at least one person, who has some experience with concrete, you shouldn't attempt it yourself. I'm not trying to say that you're not capable, come to think of it, I don't even know the size of this job, but it does take some experience to do the whole job from start to finish.

How big is this pad anyway?

 

[Don87]

Yeah I have to agree with mjaybee. Unless you can find at least one person, who has some experience with concrete, you shouldn't attempt it yourself. I'm not trying to say that you're not capable, come to think of it, I don't even know the size of this job, but it does take some experience to do the whole job from start to finish.

How big is this pad anyway?

9x12. post number 1.

 

[Carl Bert]

9x12. post number 1.

So you're pouring just under 1 1/2 or 1.3333 yds if your doing a 4" slab. Are you getting a truck or mixing by hand? If you're mixing by hand you definitely want some help. One guy mixing while the other is dumping and spreading. If you get a truck, then yes it can be done by one person, but he still needs to know something about pulling up and finishing concrete.

If you do get a truck, you are going to want to find one that mixes on site. The truck comes with all dry materials and they mix exactly what you need on site. The other option is pre-mix concrete, which is the typical concrete truck you see on the road. Problem with pre-mix is price. You're going to need, what is called a "short load" which can get very expensive, depending on how they charge in your area. In my area you pay a fortune for a short load.

Hope this helped.

 

[mjncad]

It may not look hard, but there's more to it then just getting cement and sand. I seen bad jobs from people who thought is wasn't that hard.

I've drawn up more concrete details in my life than I care to think about, and concrete IN THEORY is easy; but in reality there is a lot more to it than just pouring a wet mix of glop and making it strong and look good. Personally I hate working with concrete, whether new or old.

If you do get a truck, you are going to want to find one that mixes on site. The truck comes with all dry materials and they mix exactly what you need on site.

Hope this helped.

I used one of these on-site mix trucks on a project requiring about 1 to 1.5 cubic yards of concrete, and it worked great. It was easy to have the operator tweak the mix as we were pouring the concrete.

 

[crashz]

I'm a civil engineer and like Gary, spent a lot of time providing Quality Control or Quality Assurance, as well as design for concrete projects.

I'm not going to add to the the confusion here as much of the advice has some merit. But I personally would follow Gary's advice with and emphasis on the "well drained" subgrade.

BTW - "Placing" is the correct term. As well as "curing" rather than drying.