The letterbox is the opening which allows self leveling concrete grouting compounds such as Renderoc LA55 to flow into a hole in the side of a concrete structure which needs to be filled. The forms are fixed to the concrete structure and sealed with silicone sealer to prevent the grout from leaking out.

Aluminum pallet and header forming system for precast concrete construction that create a watertight seal for utility vaults and other applications.

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How To Pour Garden Shed Concrete Slab- www.gardenshedsonline.com.au

Watch this first video on how to pour a concrete floor for you garden shed, aviary or workshop.

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How to calculate the number of reinforcement bars to go into a slab.

A concretor finishing a slab with a concrete troweling machine.

No more wooden forms and hard labour to assemble the forms.

This is an easy time saving, labour saving new product to forming up your concrete slab. Can be done in a day. Pre engineered to your specific size. All in one kit. Steel frames, rebar, bolts and hardware for your concrete floor. Once done and cement is poured, you are ready to build. Email me for more information at ardcominc@hotmail.com

A few blokes pouring a concrete slab in a shed. Concretors pour, screed, bull-float and finish a concrete slab foe a shed. Pay attention and see how the guy edging is also nicely covering his tracks leaving no trace of the edging tool.

Precasting six cone shaped concrete structures 2 at a time for the Adelaide Aqua Port Stanvac Desalination project.

Scaffolding

The 400 mm thick bases for the concrete units was poured first and the 2600 mm cone shaped section will be added on top. After the bases are poured, the scaffolding is added to enable steel fixing, formwork erection and pouring of concrete.

Tube and Fitting Scaffold

Internal Formwork

The internal formwork is 1800 mm diameter (not cone shaped) which includes 2 x 6mm plywood layers bent into shape and screwed into the vertical timbers one layer at a time.

Cone Formwork Internal

External Formwork

The external formwork below is cone shaped. It will also be skinned with 2 x 6mm plywood layers. It will take a bit longer to screw the ply to the external formwork because of all the extra cutting into the cone shape.

Cone Formwork External

Below we see the skinned external formwork being added to the structure in 2 parts. There is no way this formwork would fit around the steel in one piece, so we split it in half, lifted it in two crane lifts and joined it all up in position.

Cone Formwork

Finished Precast Concrete Unit

Below we see the finished 30 tonne pre-casted concrete unit. It will later be placed on a barge with the other 5 units and floated out to Port Stanvac Desalination Project.

Cone Shaped Pre Cast Concrete

Plain old circular formwork is a bit easier than cone shaped formwork.

Here’s another thrust block formwork job we had to do, but this time it was below the water table which means that water would be continually pouring into the job the whole time.

Thrust Block Excavation

Imagine arriving at this job and they say they want a couple of thrust blocks around these pipes, and they want it quick coz it’s “just a couple of thrust blocks”

Pumping the Water Out

Not only that, Des had to be very careful while digging out this watery goop to avoid damage to the fiber optic telecomminications and electrical cables while the pump pumps water out all day long. Des named this job The Swamp Monster

Concrete Thrust Blocks (Pump Still Pumping)

Finally the job is done and the Concrete Thrust Blocks are in position. The formwork for this job was almost the same as this other thrust block formwork we did.