I need to pour a slab for parking motorcycles - 7m * 3m * 12cm (no idea about burger units).

 

How much would it cost to order a concrete mix truck? Last time we ordered one, we paid 1800 Bath per something (cubic meter, I don't know?). Slab is 2.52 meters^3  which would make it 4500Baht, if I'm right, does it make sense? Seems little too much?

 

Other option would be mix it by myself - I have 140 litres concrete mixer. Do you thing it would be possible to end up with reasonable result? I was pouring a lot of footings etc., sometimes like 20 mixes per evening. But I have no idea how much would the slab take. And how would that turn up?

Go the concrete truck route.

If you want to park weight on it you will need to use reo mesh.

i would have thought a steel reinforced 12cm base would be overkill to park motorbikes, but they could be really big bikes.

Simpler way would be to use concrete pavers. Cheap, easily delivered, and obviously satisfactory as are used for roads in places.

Just have to use a decent base of compacted sand, and the real benefit is no cracking, and easily removed if necessary to bury something underneath. I never even considered using a slab when I was living in LOS.

I think I saw this problem in 3rd grade math class.

If you have a concrete mixer then do it yourself. 

If you were mixing for footing foundations and and pouring then to mix for a slab will be easier for you. 

Don't see why you ask, you know the cubic M requirement already so, how many bags of cement and rough sand & stone needed is easy to work out. 

For around 3m3 it's easier to get a cement truck.

Good preperation, truck in, job finished. 

I'd go for a strong mix  and reo, just incase you want to put heavier weight on it in the future.

Doing it with a mixer is good fun but takes a while. (Also probably going to have more animal footprints on it). ????

Call a mixer for 3 cbm . It is about 2700 to 2800 for parking type of concrete. If you do it by yourself (not sure if you hire more guys for help) it would take a long time and you won't be able to make it "one piece" slab. 
note; be prepared to use the left over for something else. In case other projects. 
 

 

8 hours ago, thaibeachlovers said:

 and easily removed if necessary to bury something underneath.

Or someone underneath. 

7 x 3 = 21 m/2 that's a sizeable slab.

You must put reo-bar in and add at least 1 expansion joint x 2 minimum.

To be sure of no random cracking, also use a heavier gauge e.g no less than 4 mm than the tiny gauge reo-bar Thai's tend to use - which is not anywhere near Oz standards and if at the lesser gauge invites random cracking. 

The issues with mixing and pouring small amounts i.e.a wheelbarrow at a time with a small mixer like you've got is the cure time between pours compromises the structural integrity of the slab - melding of each barrow load at the pour boundaries creates this weakness.

Remember your in a hot country where MPA needs to be quite high to slow the quick drying time of any pour whether truck or barrow styled mixes.

If you get your crete from a reputable supplier they can/will add cure-slowing agents to the mix to help with the fast cure time due to the inherent heat here. If the slab is under cover, and against the house then maybe add a waterproofing agent to deter ground moisture rising through it.

 

Order the concrete ready mixed route ....

much easier ....  just prepare your area with the timber boxing, re-bar and that's it.

12cm thick is an overkill for parking,  I would do 10cm/100mm

7x3.0.10 =  2.1cbm 

order 2.2 cubic meters by truck.  

 

If you do it yourself, just to save a couple of thousand baht max,  and all that work with bags, sand, gravel, mixing .....  no thanks.

 

 

 

 

17 minutes ago, Tropposurfer said:

7 x 3 = 21 m/2 that's a sizeable slab.

You must put reo-bar in and add at least 1 expansion joint x 2 minimum.

To be sure of no random cracking, also use a heavier gauge e.g no less than 4 mm than the tiny gauge reo-bar Thai's tend to use - which is not anywhere near Oz standards and if at the lesser gauge invites random cracking. 

The issues with mixing and pouring small amounts i.e.a wheelbarrow at a time with a small mixer like you've got is the cure time between pours compromises the structural integrity of the slab - melding of each barrow load at the pour boundaries creates this weakness.

Remember your in a hot country where MPA needs to be quite high to slow the quick drying time of any pour whether truck or barrow styled mixes.

If you get your crete from a reputable supplier they can/will add cure-slowing agents to the mix to help with the fast cure time due to the inherent heat here. If the slab is under cover, and against the house then maybe add a waterproofing agent to deter ground moisture rising through it.

 

total volume is only  2.1cbm if he goes 10cm thick which is fine. 

You  can purchase the lowest grade of the mixed cement that should be less than 1,800. 

You can spread it up in ca. 10cm thick layer by yourself, no need to bother with any rebars if the terrain is compact (more or less).

There 2 cbm trucks available, should be enough.  

 

Yesterday I got delivered 2 pallets of ceramic tiles. If I had this roofed motorcycle parking, I would let the truck back on that slab and put it down there. Slab will be right next to road and roofed. Because of this I want it to be at least 12cm thick. I don't think it will be much more money and it could come handy in future.

 

About paving it - wouldn't it required a concrete slab underneath anyway? If I wanted it to withstand truck driving on it?

 

The slab is L shaped (around the corned of the house). I was thinking about putting around house polyester insulation boards to keep a little space between house and slab to allow it expanding, moving. 

Keep the concrete cool and moist from the very beginning, but after the concrete has set (about 8 hours after pouring), flood it with water for as long as possible--at least one week.  Curing under water can strengthen concrete by something like 50% for three days, 60% for a week, and nearly 80% in four weeks (going off the top of my head--these figures will be online somewhere).  In other words, immersing the slab in water will give strength to it (and decrease cracking) that will make up for some lack in depth.

 

Many people are too rushed to take the time for this step, but it can make a huge difference to the durability of the concrete.  It will also help the concrete to become more water resistant, i.e. less permeable to water.  This can be either an advantage or a disadvantage, depending on one's perspective, but I consider it more of an advantage with a slab because less water penetration should help to prevent soil cavitation (hollows) below the slab.

 

Concrete should have as little water as possible when mixed for maximum strength, and adding the water too soon would weaken it.  But once the concrete has hardened, while still "green", it can be completely submersed in water which will help it to remain cool, uniform in temperature (reduces cracking potential), and improves the curing process.

2 hours ago, AndyAndyAndy said:

Yesterday I got delivered 2 pallets of ceramic tiles. If I had this roofed motorcycle parking, I would let the truck back on that slab and put it down there. Slab will be right next to road and roofed. Because of this I want it to be at least 12cm thick. I don't think it will be much more money and it could come handy in future.

 

About paving it - wouldn't it required a concrete slab underneath anyway? If I wanted it to withstand truck driving on it?

 

The slab is L shaped (around the corned of the house). I was thinking about putting around house polyester insulation boards to keep a little space between house and slab to allow it expanding, moving. 

If you want to pave it,   you just need compacted crusher dust for a base, medium fine black stone,  it's used under pavers.  Lay the crusher dust down then spread it out and compact, water then compact, then lay pavers on top.  Provided rain water cannot infiltrate underneath the pavers and was the base out it will be fine.  Trucks drive on pavers at times.  After a few months it will have settled rock hard and no issue. 

6 hours ago, steven100 said:

order 2.2 cubic meters by truck.  

Nobody sells 2.2 cbm , 

2 cbm will be charged for delivery. 
perhas 3 cbm at no charge for delivery 

18 hours ago, steve187 said:

i would have thought a steel reinforced 12cm base would be overkill to park motorbikes, but they could be really big bikes.

So is 120cm dept.  100cm enougth 9mm reo.

1 hour ago, The Theory said:

Nobody sells 2.2 cbm , 

2 cbm will be charged for delivery. 
perhas 3 cbm at no charge for delivery 

Small trucks have 1/2 cub orders in our area.

8 hours ago, The Theory said:

Nobody sells 2.2 cbm , 

2 cbm will be charged for delivery. 
perhas 3 cbm at no charge for delivery 

small trucks sell 1/2 cbm ..... so order 2.5 cbm .....   

You can order as much as you want, but:

There is a fee for less than about 3cbm. And they never do free delivery for that little order. 
 

On 9/18/2022 at 12:52 AM, Adumbration said:

Small trucks have 1/2 cub orders in our area.

Sure they do, but how much does that 1/2 cbm will cost ?!!!