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Discussion Starter · #1 ·
hello,

ok, first of all, im not a mason, by anymeans, but i think i have an idea of what im doing. i want to extend the patio concrete slab that is currently there. i didnt dig yet, but it looks to be about a 3" slab of concrete, judging by how deep the water drain in the slab is set in. the exiting slab is 10'x10'. i want to extend it another 10'x10'. now the questions!
1) do i use item #4 for a base before pouring the concrete? or just #2 stone?
2) should the dirt/sand be tamped berfore putting in the item#4 or stone?
3) when i build the forms, i should make sure they are flush with the existing slab, and tapered away from the house, correct? and what should the pitch be?
4) should i put a piece of that felt like board between the existing slab, and the new slab for exspantion?
5) would it be fesible to use the ready mixed concrete in a bag for this job? or buy the morter and the sand in bags, and have stone/item#4 deleivered?
and how many bags of premixed, or how many bags of sand, morter, and how much stone/item#4 for will i need? if "I" mix the concrete, what is the formula for the mix?
how much water should i use?
should i layer wire mesh over the stone/item#4, or under? should i use the wire mess that looks like fencing?
6)after i pour the concrete, i pull the wire mesh up into the concrete so it is somewhat intwrined in the mix, and not lying on the bottom, correct?
7)before i rake the concrete, should i tap on the sides of the form, all the way around to release as much trapped air as possible?

well, please let me know what u all think! thank u, any help will be greatly appriciated!

bob
 

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Discussion Starter · #3 · (Edited)
Extending Concrete Slab

tscarborough,

thanks for the info! item#4 or maybe its just item4, is used as a base under blacktop. it is like a fine crushed stone, with a binder added to compact better. what do u mean by "road base"?and when u say "10/10 wire, do u mean the wire mesh that comes in sheets? or in a roll? and drill holes into the side of the exsiting slab, so that the rebar is 6" into the exsiting slab, and 6" sticking into the form area so both slabs will be held together when the new slab is cured? and do u mean acually "grease" the rebar before inserting into the slab??? can i use rebar for stakes too? can i use red bricks about 3" thick with holes in them to hold the wire mesh off the ground? i have alot of them kicking around! sorry if im asking anoying questions, but i dont have much experience in this field, but beleive i could pull it off, and maybe save some money in the long run...bob
 
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